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Hitachi RAS-(2-3)HVRN(S)(2), Service Manual

The Hitachi RAS-(2-3)HVRN(S)(2) Service Manual is a comprehensive user guide for this advanced air conditioner model. With detailed instructions and illustrations, this manual is essential for troubleshooting, maintenance, and optimal utilization of the product. Download for free from manualshive.com and unlock the full potential of your Hitachi air conditioner.

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10  Servicing

405

SMGB0064 rev.0 - 08/2011

10

 
1. High pressure switch.
2. Pressure switch for control.
3. Brazing.

 







Removing four-way valve coil

1 

Remove the pipe cover following 

Removing pipe cover

, see on page 401

.

2 

Remove three (3) fixing screws and remove the upper cover.

3 

Remove the front cover following 

Removing front cover

, see on page 401

.

4 

Remove the electrical box cover.

5 

Disconnect the PCN6 connector on the control PCB of the electrical box.

1: PCN6 Connector (Green)
 

 

6 

Remove one (1) fixing screw to remove the 4-way valve coil.

1. 4-way valve.
2. 4-way valve coil.
3. Screw.

N O T E

• 

DO  NOT  touch  electrical  components  while  the  LED1 

(Red) is ON to avoid electrical shock. Wait until the LED 

turns off.

3

1

2

  







Removing electronic expansion valve coil

1 

Remove the pipe cover following 

Removing pipe cover

, see on page 401

.

2 

Remove three (3) fixing screws and remove the upper cover.

3 

Remove the front cover following 

Removing front cover

, see on page 401

.

4 

Remove the electrical box cover.

5 

Remove seven (7) fixing screws and remove the side cover.

Summary of Contents for RAS-(2-3)HVRN(S)(2)

Page 1: ...08 2011 Service Manual UTOPIA DC INVERTER IVX 2 2 5 HP ES SERIES H V RN S 2 E H V RNM 2 E UTOPIA DC INVERTER IVX 2 2 5 HP ES SERIES RAS 3 6 HVRNM2E RAS 4 12 HRNM 2 E RAS 2 3 HVRN S 2 RAS 4 6 HVRNS2E RAS 4 10 HRNS 2 E ...

Page 2: ......

Page 3: ...6 7 8 9 10 11 12 In dex General information Unit Installation Piping work and refrigerant charge Electrical Wiring Control System Optional functions Test Run Troubleshooting Spare Parts Servicing Electrical checks of main parts Maintenace notes ...

Page 4: ...IV SMGB0064 rev 0 08 2011 Index ...

Page 5: ...NM 11 2 5 Installation space Initial ckeck 12 2 5 1 RAS 3HVRNM2E RAS 2 3 HVRN S 2 RAS 4 10 H V RNS2E 12 2 5 2 RAS 4 6 H V RNM2E RAS 8 10 HRNSE 16 2 5 3 RAS 8 12 HRNM 20 2 6 Place provision 22 2 6 1 Place provision for RAS 3 12 H V RNM 2 E and RAS 4 10 H V RNS 2 E 22 2 6 2 Place provision only for RAS 2 3 HVRN S 2 25 2 7 Optional parts and installation 28 2 7 1 Optional parts and installation for R...

Page 6: ...g selection 77 3 4 4 Twin and triple system installation 78 3 4 5 Connecting flare adapter only for RAS 2 2 5 HVRN2 79 3 4 6 Drain discharging boss 80 4 Electrical Wiring 81 4 1 General check 82 4 2 Electrical wiring for the outdoor unit IVX Series 83 4 2 1 Electrical wiring connection for the outdoor unit 83 4 2 2 Setting the DIP switches for the outdoor unit 84 4 3 Electrical wiring for the outd...

Page 7: ...VX Series 142 5 5 2 Standard control functions for ES Series 151 6 Optional functions 161 6 1 Outdoor units IVX and ES series 162 6 1 1 Available ports 162 6 1 2 Configuration 164 6 1 3 Description of optional input signals 165 6 1 4 Description of optional output signals 166 6 1 5 Optional functions 167 7 Test Run 173 7 1 Checking procedure before the test run 174 7 2 Test run procedure using the...

Page 8: ...01 8 3 3 Self Checking procedure of the Indoor Unit PCB only for RPK 303 9 Spare Parts 325 9 1 Spare parts for IVX Series 326 9 2 Spare parts for ES Series 341 10 Servicing 359 10 1 Introduction 360 10 2 Servicing for IVX series 361 10 2 1 Outdoor unit RAS 3HVRNM2E 361 10 2 2 Outdoor units RAS 4 6 H V RNM2E 372 10 2 3 Oudoor units RAS 8 12 HRNM 385 10 3 Servicing for ES Series 401 10 3 1 Outdoor U...

Page 9: ...d 464 12 4 Abnormally high operation sound in the ceiling type indoor unit 465 12 5 Alarm code 31 466 12 6 Not cooling well due to insufficient installation space for the outdoor unit 467 12 7 Caution with the refrigerant leakage 468 12 7 1 Maximum permissible concentration of the HCFC gas 468 12 7 2 Calculation of the refrigerant concentration 468 12 7 3 Countermeasure for the refrigerant leakage...

Page 10: ...x Contens SMGB0064 rev 0 08 2011 ...

Page 11: ...2 1 1 2 Introduction 2 1 1 3 Environment friendly units 2 1 2 Applied symbols 3 1 3 Product guide 4 1 3 1 Classification of IVX series outdoor unit models 4 1 3 2 Classification of ES series outdoor unit models 4 1 3 3 Product guide Outdoor units 5 1 3 4 Accessory code list 6 G ener al info rmati on 1 ...

Page 12: ... heat pump resulting in an air conditioning system valid for the whole year in which the installation of additional and specific systems a not necessary 2 2 5HP Series composed by the smallest capacity units specially designed for installation where a single combination is the most suitable solution IVX With nominal capacities from 7 1 kW to 30 0 kW cooling mode IVX series is the series with the h...

Page 13: ...o your safety and phy sical wellbeing Not taking these instructions into account could lead to serious very serious or even fatal injuries to you and others in the proximities of the unit In the texts following the danger symbol you can also find information on safe procedures during unit installation C AUTION The text following this symbol contains information and instructions relating directly t...

Page 14: ...Three phase unit 3N 400V 50Hz R Inverter system N R410A refrigerant M IVX Series E Made in Europe Made in Japan RAS XX H V R N M 2 X 1 3 2 Classification of ES series outdoor unit models Unit type outdoor unit RAS Position separating hyphen fixed Capacity HP 2 2 5 3 4 5 6 8 10 H Heat Pump V Single phase unit 1 230V 50Hz Three phase unit 3N 400V 50Hz R Inverter system N R410A refrigerant S ES Serie...

Page 15: ...eck the exact classification for each unit model type power and series in Classification of IVX series out door unit models see on page 4 ES series Outdoor Units ES Single phase 1 Three phase 3 HVRN 2 E HRNSE Unit Code Unit Code Unit Unit Code RAS 2HVRN2 60288390 7E306107 RAS 2 5HVRN2 60288391 7E306108 RAS 3HVRNS2 60288392 7E306109 RAS 4HVRNS2E 7E306020 RAS 4HRNS2E RAS 5HVRNS2E 7E306021 RAS 5HRNS2...

Page 16: ...NP280B Snow protection hood air inlet of rear side Zinc plate For 4 6HP IVX and 8 10HP ES ASG NP280BS2 Snow protection hood air inlet of rear side Stainless plate For 4 6HP IVX and 8 10HP ES ASG NP335B Snow protection hood air inlet of rear side Zinc plate For 8 12HP IVX 60291434 ASG NP335BS2 Snow protection hood air inlet of rear side Stainless plate For 8 12HP IVX ASG NP56L Snow protection hood ...

Page 17: ... 5 2 RAS 4 6 H V RNM2E RAS 8 10 HRNSE 16 2 5 3 RAS 8 12 HRNM 20 2 6 Place provision 22 2 6 1 Place provision for RAS 3 12 H V RNM 2 E and RAS 4 10 H V RNS 2 E 22 2 6 2 Place provision only for RAS 2 3 HVRN S 2 25 2 7 Optional parts and installation 28 2 7 1 Optional parts and installation for RAS 2 3 HVRN S 2 28 2 7 2 Optional parts and installation RAS 3HVRNM2E RAS 4 6 H V RNS2E 33 2 7 3 Optional...

Page 18: ... area not accessible by the general public Aluminium fins have very sharp edges Pay attention to the fins in order to avoid injury Do not install the indoor units in a flammable environment to avoid a fire or an explosion Check to ensure that the ceiling slab is strong enough If not strong enough the indoor unit may fall down on you Do not install the indoor units outdoor unit remote control switc...

Page 19: ... shown below RAS 3HVRNM2E RAS 4 6 H V RNM2E RAS 2 3 HVRN S 2 RAS 8 12 HRNM RAS 4 6 H V RNS2E RAS 8 10 HRNSE 1 A B C D 1 A B C D 1 Wire rope A Over 60º B 0 7 to 1 0 m C Do not remove the plastic band or the corrugate paper frame D Pass the wire ropes through each lifting hole in the wooden base as shown C AUTION Lift the outdoor unit in its factory packaging with 2 wire ropes For safety reasons ens...

Page 20: ...with two ropes as shown below At leat two persons are needed to move the unit RAS 2 3 HVRN S 2 a 515 mm b 180 mm h 275 mm 1 RAS 3HVRNM2E a 590 mm b 185 mm h 370 mm 1 RAS 4 6 H V RNS2E For 4 HP a 635 mm b 180 mm h 335 mm For 5 6 HP a 630 mm b 190 mm h 360 mm RAS 4 6 H V RNM2E a 615 mm b 190 mm h 570 mm 1 RAS 8 12 HRNM a 615 mm b 190 mm h 570 mm RAS 8 10 HRNSE For 8 HP a 325 mm b 206 mm h 565 mm For...

Page 21: ...the following accessories are packed with the unit N O TE If any of these accessories are not packed with the unit please contact your dealer Accessory Appearance Quantity RAS 8HRNM RAS 10HRNM RAS 12HRNM Gasket 1 1 1 Pipe flange for refrigerant gas piping 1 1 1 Ring core 1 1 1 Cable tie 1 1 1 Compressed sheet 1 1 1 ...

Page 22: ...ct to direct sunlight on the back wall ensure the length marked with be 400 or greater Ensure 250 mm or more of the side space on the pipe cover side Upper Side Blocked Single Installation Multiple Installation Two units or more Pipe Cover Pipe Cover Fifteen mm of space is acceptable for one of the lateral sides Ensure 250 mm or more of the side space on the pipe cover side Allow 250 mm of service...

Page 23: ...th right and left sides shall be open Pipe Cover Pipe Cover Be sure to use the fan direction guide Leave open both right and left sides Be sure to use the fan direction guide Allow 250 mm of service space between units Serial installation allowed up to two units Leave open both right and left sides The length A is as show in the following table L A 0 L 1 2H 100 or greater 1 2H L H 200 or greater W...

Page 24: ...Cover Pipe Cover Ensure 250 mm or more of the side space on the pipe cover side Ensure 250 mm or more of the side space on the pipe cover side Upper Side Blocked Pipe Cover Pipe Cover Ensure 250 mm or more of the side space on the pipe cover side Ensure 250 mm or more of the side space on the pipe cover side ...

Page 25: ...ater from upper unit falling on the lower unit Ensure 250 mm or more of the side space on the pipe cover side Allow 400 mm of service space above the top board Be sure to use the fan direction guide Allow 250 mm of service space between units Serial side way installation allowed but leave open both right and left sides Close the part A not to allow the outlet air bypassed Install to avoid the drai...

Page 26: ...ht and left sides Be sure to use the fan direction guide Allow 100 mm of space between units Leave open both right and left sides When subject to direct sunlight on the back wall ensure the length marked with be 500 or greater Upper Side Blocked Single Installation Multiple Installation Two units or more 100 mm or more of the side space is acceptable on the service cover side Dimensions in shows n...

Page 27: ...e between units Both right and left sides shall be open Be sure to use the fan direction guide Leave open both right and left sides Be sure to use the fan direction guide Allow 100 mm of space between units Serial installation allowed up to two units Leave open both right and left sides The length A is as shown in the following table L A 0 L 1 2H 200 1 2H L H 300 When L H use a base for outdoor un...

Page 28: ...ght and left sides Close the part A not to allow the outlet air bypassed Install to avoid the drain water from upper unit falling on the lower unit Upper Side Blocked Single Installation Multiple Installation Be sure to use the fan direction guide Close the part A not to allow the outlet air bypassed Install to avoid the drain water from upper unit falling on the lower unit Be sure to use the fan ...

Page 29: ...approx 100 mm of space from the side unit Leave open both right and left sides The length A is as shown in the following table L A 0 L 1 2H 200 1 2H L H 300 NOTE When L H use a base for outdoor unit to make L H Close the base not to allow the outlet air bypassed Be sure to use the fan direction guide in order to ensure the length marked with ...

Page 30: ...8 12 HRNM Single installation Around sides are open Around sides are open with obstacles above Around sides are closed Around sides are open with obstacles above Multiple installation Around sides are open Around sides are open with obstacles above Multi Row ...

Page 31: ...qual or greater than L H Unit height 1650 mm base concret height L A B 0 L 1 2 H 600 or more 300 or more 1 2H L H In this situation ensure that the base is closed and does not allow the airflow to short circuit In each case install the outdoor unit so that the discharge flow is not short circuited When the installation dimension results the one marked with an mount the air flow guide ...

Page 32: ...150 4 Anchor bolt M10 Ø12 5 Hole 5 Drainage Wide 100 x Depth 150 6 Drainage 7 Vibration proof rubber N OT E Space for downward piping space 1 2 3 4 5 6 7 4 Anchor bolt location in case of RAS 8 12 HRNM 1 1 The whole base of the outdoor unit should be installed on a foundation When using vibration proof material it should also be positioned in the same place When installing the outdoor unit on a fi...

Page 33: ... be dificult to remove the service cover B 1 2 3 Fix unit to the wall 1 Fix the unit onto the wall as shown in the figures Field supplied bracket 2 Secure the foundation to avoid noise and warping 3 To avoid vibrations transferring to the building use a rubber mat RAS 3HVRNM2E RAS 4 6 H V RNM2E RAS 4 6 H V RNS2E RAS 8 12 HRNM RAS 8 10 HRNSE A 1 2 2 1 1 Rubber material 2 Fixing plate NOTE In RAS 8 ...

Page 34: ... support 2 Anchor bolts 3 Supplied by the installer C A U TION Follow these installation procedures carefully The installation must be done so as to ensure that the outdoor unit does not lean vibrate make a noise or fall in the event of strong gusts of wind or earthquakes Calculate the resistance to vibration caused by earthquakes to guarantee that the installation is sturdy enough to prevent fall...

Page 35: ... operation RAS 3HVRNM2E RAS 4 6 H V RNM2E RAS 4 6 H V RNS2E RAS 8 12 HRNM RAS 8 10 HRNSE C AUTION An excessively strong wind blowing against the outlet of the outdoor unit may cause reverse rotation and damage to the fan motor 2 6 2 Place provision only for RAS 2 3 HVRN S 2 1 Secure the outdoor unit with the anchor 1 Base of outdoor unit 2 Nut 3 Special washer M12 4 Anchor bolts 5 Filled mortar 6 ...

Page 36: ...dditional drainage around the foundation 1 Drain hole 30x80 2 Drain hole 3 30x80 3 Front side 1 2 3 5 The whole of the base of the outdoor unit should be installed on a foundation When using vibration proof mat it should also be positioned the same way When installing the outdoor unit on a field supplied frame use metal plates to adjust the frame width for stable installation as shown in Figure 1 ...

Page 37: ...ildings where strong wind is ex pected against the product 1 Choose a location where the outlet or inlet side of the product will not be exposed to strong wind 2 When the outlet is exposed to strong wind Direct strong wind may cause lack of air flow and adversely affect to normal function C AUTION Excessive strong wind against the outdoor unit outlet may cause inverse rotation and damage the fan a...

Page 38: ... 2 1 Mounting dimension 2 Air flow guide Air discharge direction Upward downward left right Material Weather proof polypropylene resin Color Gray Weight 1 4 kg Accessories Fixing screw 4x M5 SUS x 12 4x M5 SUS x 30 Installation manual Self screw 2x M4 x 13 Installation restriction Wind Guard or Snow protection hood is not available to install with air flow guide Guard net is available to be instal...

Page 39: ... 2 Air flow 3 Outdoor unit 4 M5 fixing screw x4 Accessories 5 Air flow guide 1 2 3 4 4 5 Service space In case of upward air discharge In case of right and left sides air discharge enough space for air discharge is required The downward air discharge is also available In such case install the base under the unit to secure enough space for air discharge In case of serial units installation air disc...

Page 40: ...rd Attaching example of air wind guard Attach the air flow guide to the air discharge grille with four 4 screws supplied The fixing holes are located at 4 positions on the grille Screw tightening torque 2 4 3 1 N m Do not remove the air discharge grille for air flow guide installation C A U TION If the air guide is installed without discharge grille it may cause injury due to rotating fan Two wind...

Page 41: ...y wire rope to prevent overturning 1 2 3 4 5 Rear suction hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Upper front panel Upside 1 4 Upper front panel Downside 1 5 Hole for safety wire rope to prevent overturning 6 Fixing screw Accessories Left suction hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Upper front panel Upside 1 4 Upper front panel Downsi...

Page 42: ...sheet Iron Stainless NSSC180 Bonderized steel sheet Iron Stainless NSSC180 Bonderized steel sheet Iron Stainless NSSC180 Color Gray 1 0Y8 5 0 5 or approximation Gray 1 0Y8 5 0 5 or approximation Gray 1 0Y8 5 0 5 or approximation Weight 3 kg 6 kg 3 kg Assembling Knockingdown parts assembled at field Components Hood For air discharge part x 1 For rear side air intake x 1 For left side air intake x 1...

Page 43: ...ity 1 per unit 1 1 2 1 Mounting dimension 2 Air flow guide Air discharge direction Upward downward left right Material Weather proof polypropylene resin Color Gray Weight 1 9 kg Accessories Fixing screw x 4 M5 SUS x 20 Installation manual Installation restriction Wind Guard or Snow protection hood is not available to install with air flow guide Guard net is available to be installed together Attac...

Page 44: ...stall the base under the unit to secure enough space for air discharge In case of serial units installation air discharge should be upward 1 Min 200 mm 2 Outdoor unit 3 Air flow guide 4 Passage side 1 2 3 4 Wind guard Specifications Model WSP 335A Quantity 1per unit 1 1 2 2 3 1 Mounting dimension 2 Air flow 3 3 4xØ7 Material Galvanized sheet metal baked painting Color Gray 1 0Y8 5 0 5 Weight 5 5 k...

Page 45: ...harge grille it may cause injury due to rotating fan One windguard cover installation 1 Air discharge grille 2 Wind guard 3 Air discharge grille 4 Outdoor unit 5 M5 fixing screw x4 Accessories 1 2 3 4 5 Service space Both sides of the outdoor unit should be open No obstacles should be placed in the air discharge side 1 Min 200 mm 2 Outdoor unit 3 Wind guard 1 2 3 Snow protection hood Air discharge...

Page 46: ...Left suction hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Front panel Upside 1 4 Front panel Downside 1 5 Fixing hole x 2 6 Fixing screw Accessories A Enlarged view of A Fixing Hole 2 1 3 4 5 6 A A A Attaching example of snow protection hood 1 1 1 1 1 2 3 4 A B C 5 6 7 1 Fixing screw Accessories 2 Rear suction hood 3 Wire rope Optional For overturning protection 4 Air disc...

Page 47: ...ake x 1 Unit Fixing screw 4 M5x12 tapping screw 5 M5x14 tapping screw 6 M5x12 tapping screw Unit Fixing screw SUS 6 M5x12 tapping screw 6 M5x14 12 M5x12 tapping screw 12 M5x14 10 M5x12 tapping screw 10 M5x14 Installation manual Installation restriction Installation with Guard net or Wind guard is not available Installation with Guard net is not available Safety wire rope for overturning prevention...

Page 48: ...ns on the grille Screw tightening torque 2 4 3 1 N m Do not remove the air discharge grille for air flow guide installation C A U TION If the air guide is installed without discharge grille it may cause injury due to rotating fan Two flow guides installation 1 Air discharge grille 2 Air flow 3 Air flow guide see the note 4 Outdoor Unit 5 M5 fixing screw x4 Accessories N OT E Air flow direction of ...

Page 49: ... hood is not available to install with Wind guard Attaching example of air wind guard Attach the air flow guide to the air discharge grille with four 4 screws supplied The fixing holes are located at 4 positions on the grille Screw tightening torque 2 4 3 1 N m Do not remove the air discharge grille for air flow guide installation C AUTION If the air guide is installed without discharge grille it ...

Page 50: ...ixing screw Accessories 6 Hole for safety wire rope to prevent overturning 1 2 3 4 5 6 Rear suction hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Upper front panel Upside 1 4 Upper front panel Downside 1 5 Fixing screw Accessories 6 Hole for safety wire rope to prevent overturning 3 4 2 1 5 6 Left suction hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3...

Page 51: ...1 2 2 2 2 2 A B C 3 4 5 6 6 7 7 1 Left suction hood 2 Fixing screw Accessories 3 Rear suction hood Upper side 4 Wire rope Optional For overturning protection 5 Rear suction hood Lower side 6 Air discharge hood 7 Air discharge grille 8 Air discharge grille A Front side B Left side C Rear side ...

Page 52: ...ake x 1 Fixing screw 4 M5x12 tapping screw 11 M5x14 tapping screw 8 M5x12 tapping screw Fixing screw SUS 6 M5x14 tapping screw 6 M5x14 24 M5x14 tapping screw 24 M5x14 12 M5x12 tapping screw 12 M5x14 Installation manual Installation restriction Installation with Guard net Wind guard or Air flow guide is not available Installation with Guard net is not available Safety wire rope for overturning prev...

Page 53: ...s on the grille Screw tightening torque 2 4 3 1 N m Do not remove the air discharge grille for air flow guide installation C AUTION If the air guide is installed without discharge grille it may cause injury due to rotating fan Two flow guides installation 1 Air discharge grille 2 Air flow 3 Air flow guide see the note 4 Outdoor Unit 5 M5 fixing screw x4 Accessories N O TE Air flow direction of bot...

Page 54: ...ood is not available to install with Wind guard Attaching example of air wind guard Attach the air flow guide to the air discharge grille with four 4 screws supplied The fixing holes are located at 4 positions on the grille Screw tightening torque 2 4 3 1 N m Do not remove the air discharge grille for air flow guide installation C A U TION If the air guide is installed without discharge grille it ...

Page 55: ...rge hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Front panel 1 4 Stay 4 5 Fixing screw Accessories 6 Hole for safety wire rope to prevent overturning 1 2 3 4 5 6 Rear suction hood Nº Part name Quantity 1 Right side plate 1 2 Left side plate 1 3 Upper front panel Downside 1 4 Upper front panel Upside 1 5 Fixing screw Accessories 6 Hole for safety wire rope to prevent overtu...

Page 56: ...ing screw Accessories A 316 A 1587 250 3 4 1 2 6 230 5 347 330 330 330 235 296 8 5 Ø15 R 7 A Attaching example of snow protection hood 1 2 2 2 2 2 A B C 3 4 5 5 6 6 7 8 1100 1650 390 1 Left suction hood 2 Fixing screw Accessories 3 Rear suction hood Upper side 4 Wire rope Optional For overturning protection 5 Air discharge hood 6 Air discharge grille 7 Rear suction hood Lower side 8 Outdoor unit ...

Page 57: ... 5 or approximation Gray 1 0Y8 5 0 5 or approximation Weight 3 kg 14 kg 8 kg Assembling Knockingdown parts assembled at field Components Hood For air discherge part x 1 For rear side air intake x 1 Upper side x 1 lowe side x 1 For left side air intake x 1 Fixing screw 4x M5x12 l tapping screw 10x M5x14 l tapping screw 8x M5x12 l tapping screw Fixing screw SUS 6x M5x12 l tap ping screw 6x M5x14 l 2...

Page 58: ...2 Unit Installation 48 SMGB0064 rev 0 08 2011 ...

Page 59: ...e pressure by check joint 56 3 2 7 Refrigerant charge quantity 57 3 2 8 Pump down refrigerant 59 3 3 Outdoor Units IVX Series 60 3 3 1 Piping connection 60 3 3 2 Refrigerant piping length 65 3 3 3 Refrigerant piping selection 66 3 3 4 Twin and triple system installation 67 3 3 5 Drain discharging boss 68 3 4 Outdoor Units ES Series 70 3 4 1 Piping connection 70 3 4 2 Refrigerant piping length 75 3...

Page 60: ...re insulation if it is installed in a location where the ambient humidity may condensate on the drain pipe outer surface This condensation could drop and cause damage The insulation for the drain pipe must be selected in order to ensure that the vapour is sealed and in order to prevent the condensation forming The drain trap should be installed next to the indoor unit designed according to good pr...

Page 61: ...t the drain pump will start working automatically 3 Make sure that the water flows smoothly and that no water leakage occurs If you cannot find water at the end of the drain pipe pour again approximately 1 8 litres of water into the drain pan 4 Turn the power supply off N O T E Pay attention to the insulation material thickness when the left side piping is installed If the insulation material is t...

Page 62: ...ls which cause copper powder When cutting pipes secure the part for brazing in accord ance with both national and local regulations Use security glasses and gloves for cutting or welding works Piping Connection When connecting liquid piping for units with piping longer than 15 meters apply a piping size of Ø9 53 mm 3 8 inches Fix the connecting pipe as shown in the following figure using the insul...

Page 63: ...erial and can be a source of future leakages Insulation Attach the pipe insulation to each branch using vinyl tape Attach also insulation to field supplied pipes in order to prevent the capacity decrease according to the ambient air conditions and dewing on the low pressure pipe surface 1 Cap 2 Field supplied insulation 3 Do not make a gap N O T E When polyethylene foam is applied it is recommende...

Page 64: ... through the pipe ends Oxidation film during brazing without blowing nitrogen Insufficient flushing by nitrogen after brazing Clogging of expansion valve capillary tube and filter Oxidation of oil Compressor failure Insufficient cooling or heating com pressor failure Pipe Protection 1 Mounting Caps 2 Taping 3 Pinching Flushing 3 No leakage No leakage shall exist Brazing failure Failed flaring work...

Page 65: ...0 1 0 41 8 Ø31 75 0 12 Ø32 0 0 1 0 47 12 0 09 0 0 13 0 12 0 0 13 Ø19 05 0 09 Ø19 3 0 1 0 44 10 Ø38 1 0 12 Ø38 3 0 1 0 52 14 0 09 0 0 16 0 12 0 0 18 A basic brazing method is shown below 1 Pre heat the outer tube for better flowing of the filler metal 2 Heat inner side tube evenly 3 Rubber plug 4 Packless valve 5 High pressure hose 6 0 03 to 0 05 MPa 0 3 to 0 5 Kg cm2 G 7 Reducer valve open this va...

Page 66: ... being used in the room If the flare nut is tightened too hard the flare nut may crack after a long time and cause refrigerant leakage 3 2 6 Caution of the pressure by check joint When the pressure is measured use the check joint of gas stop valve A and use the check joint of liquid piping B in the figure below At that time connect the pressure gauge according to the following table because of hig...

Page 67: ...ngth ℓ m Additional Charge Factor P RAS 3HVRNM2E 2 4 30 0 04 RAS 4H V RNM2E 3 8 30 0 06 RAS 5H V RNM2E 4 0 30 0 06 RAS 6H V RNM2E 4 0 30 0 06 RAS 8HRNM 7 3 30 RAS 10HRNM 7 8 30 RAS 12HRNM 8 5 30 1 Refrigerant shall be added if L is longer than the chargeless length shown in the table above Calculate the additional amount as follows A 30 m B 8 m C 8 m Chargeless Length ℓ for 4HVRNM2E is 30 m accord...

Page 68: ...actor P RAS 2HVRN2 1 6 30 0 03 RAS 2 5HVRN2 1 6 30 0 03 RAS 3HVRNS2 1 9 20 0 03 RAS 4H V RNS2E 2 8 20 0 04 RAS 5H V RNS2E 2 9 30 0 06 RAS 6H V RNS2E 2 9 30 0 06 RAS 8HRNSE 6 0 30 0 065 RAS 10HRNSE 6 2 30 0 12 1 Refrigerant shall be added if L is longer than the chargeless length shown in the table above Calculate the additional amount as follows A 30 m B 8 m C 8 m Chargeless Length ℓ for 4HVRNS2E ...

Page 69: ...W1 1 pin of the outdoor unit PCB at the ON side for cooling operation Close the liquid stop valve and col lect the refrigerant 4 When the pressure at lower pressure side gas stop valve indicates 0 01 MPa 100 mmHg perform the following procedures immediately Close the gas stop valve Set the DSW1 1 pin at the OFF side To stop the unit operation 5 Turn OFF the power source CAUTION Measure the low pre...

Page 70: ...ole 3 Right side piping work Knock out hole 4 Bottom side piping work Piping cover 5 Front side piping work Knock out hole 6 Front side piping cover 1 2 3 4 5 6 A Push down the cover slowly B Rear cover C Front side piping cover D Rear side piping cover A B C D Make holes in the piping cover or cabinet for taking the pipes out Take the piping cover away from the unit and make holes by cutting alon...

Page 71: ...ing work and refrigerant charge 61 SMGB0064 rev 0 08 2011 3 1 Service cover 2 Hook three places two fan 2 Hook two places one fan 1 2 For the front and side piping 1 Front piping hole 2 Side piping hole 1 2 ...

Page 72: ...Mount the piping cover in order to avoid water entering into the unit Seal the holes where pipes and wires are inserted by us ing an insulation field supplied 3 If the field supplied piping is connected with stop valves di rectly it is recommended to use a tube bender 4 Check that the stop valves are closed completely before con necting pipes 5 Connect the field supplied refrigerant pipes to the i...

Page 73: ...supplied 4 Cap 5 Refrigerant Pressure To outdoor unit 6 Seat Surface Fully closed position 7 Check Joint Only the charging those can be connected 8 Cap 9 O Ring Rubber 10 Spindle valve Open Counterclockwise Close Clockwise Tighten torque Nm Valve type Model A B C D Liquid valve 3 6HP 7 9 34 42 34 42 14 18 Gas valve 3 6HP 9 11 34 42 68 82 14 18 Liquid valve 8HP 7 9 37 40 16 10 12HP 7 9 37 60 16 Gas...

Page 74: ... gas leakage at the flare nut connection by using nitrogen gas to increase the pressure at 4 15 MPa for outdoor units inside of the field supplied piping Operate the vacuum pump for 1 to 2 hours until the pressure decreases lower than a pressure of 756 mmHg in vacuum For charging refrigerant connect the gauge manifold using charging hoses with a refrigerant charging cylinder to the check joint of ...

Page 75: ...on Unit Maximum piping length between Outdoor and each indoor unit L Actual Equivalent Maximum Height difference Outdoor unit is higher than indoor unit Indoor unit is higher than Outdoor unit H RAS 3HVRNM2E 50 70 30 20 RAS 4H V RNM2E 70 90 RAS 5H V RNM2E 75 95 RAS 6H V RNM2E The possible combination between Outdoor Unit and Indoor Unit are the following Single System Twin System Triple System L A...

Page 76: ...r Unit Pipe Size Multikit Distributor Liquid Piping Gas Piping Twin Triple Quad RAS 3HVRNM2E Ø9 53 Ø15 88 TE 03N E 102SN2 RAS 4H V RNM2E Ø9 53 Ø15 88 TE 56N E 102SN2 TRE 06N RAS 5H V RNM2E Ø9 53 Ø15 88 TE 56N E 102SN2 TRE 06N TRE 56N TE 03N or TE 56N 3 RAS 6H V RNM2E Ø9 53 Ø15 88 TE 56N TRE 06N TRE 56N TE 03N or TE 56N 3 RAS 8HRNM Ø9 53 1 Ø25 40 2 TE 08N E 162SN2 TRE 810N QE 810N RAS 10HRNM Ø12 70...

Page 77: ...aller than Hin m Maximum height between indoor units Hin m H V RNM 2 E 3 0 Installing distributor 1 Install the distributor supplied by HITACHI on request A tee can not be installed instead of a branch pipe Example Twin system 2 Installing the Distributor Fix the branch pipe horizontally to the pillar wall or celling Piping must not be fixed rigidly to the wall as thermal expansion and contraction...

Page 78: ...ily used as a drain receiver and the drain water in it is discharged this drain boss is used to connect the drain piping Model Applicable Model DBS 26 H V RNM 2 E Connection procedure 1 Insert the rubber cap into the drain boss up to the extruded portions 2 Insert the boss into the unit base and turn approximately 40 degree counterclockwise 3 The outer diameter section of the drain boss is 32 mm 4...

Page 79: ...3 Piping work and refrigerant charge 69 SMGB0064 rev 0 08 2011 3 Bottom base view 1 Drain pipe 2 Extruded portion 3 Drain boss 4 Rubber cap 5 Drain hole of base 1 1 2 3 4 5 ...

Page 80: ...le 3 Right side piping work Knock out hole 4 Bottom side piping work Piping cover 5 Front side piping work Knock out hole 6 Front side piping cover 1 2 3 4 5 6 A Push down the cover slowly B Rear cover C Front side piping cover D Rear side piping cover A B C D Make holes in the piping cover or cabinet for taking the pipes out Take the piping cover away from the unit and make holes by cutting along...

Page 81: ... Pipe cover 3 Stop valve 4 Connecting piping 5 Liquid 6 Gas A Direction to remove Pipe Cover For the front and side piping 1 Front piping hole 2 Side piping hole 1 2 To use racking or conduit tubes check the size and remove the stiped parts following the slit N O T E Place insulation field supplied to protect cables and pipes from being damaged by plate edges ...

Page 82: ...nserted by using an insulation field supplied 3 If the field supplied piping is connected with stop valves directly it is recommended to use a tube bender 4 Check that the stop valves are closed completely before connecting pipes 5 Connect the field supplied refrigerant pipes to the indoor unit and outdoor unit Apply the oil thinly at the seat flare nut and pipe before tightening The required tigh...

Page 83: ...d 4 Cap 5 Refrigerant Pressure To outdoor unit 6 Seat Surface Fully closed position 7 Check Joint Only the charging those can be connected 8 Cap 9 O Ring Rubber 10 Spindle valve Open Counterclockwise Close Clockwise Tighten torque Nm Valve type Model A B C D Liquid valve 2 6HP 7 9 34 42 34 42 14 18 Gas valve 2 6HP 9 11 34 42 68 82 14 18 Liquid valve 8 10HP 8 40 40 16 Gas valve 8 10HP 13 45 100 9 O...

Page 84: ...increase the pressure at 4 15 MPa for outdoor units inside of the field supplied piping Operate the vacuum pump for 1 to 2 hours until the pressure decreases lower than a pressure of 756 mmHg in vacuum For charging refrigerant connect the gauge manifold using charging hoses with a refrigerant charging cylinder to the check joint of the liquid line stop valve Charge the proper quantity of refrigera...

Page 85: ...esigned using the following table Piping length specification Unit Maximum piping length between Outdoor and each indoor unit L Actual Equivalent Maximum Height difference Outdoor unit is higher than indoor unit Indoor unit is higher than Outdoor unit H RAS 2HVRN2 50 30 20 RAS 2 5HVRN2 RAS 3HVRNS2 30 RAS 4H V RNS2E 50 RAS 5H V RNS2E RAS 6H V RNS2E RAS 8HRNSE 50 70 RAS 10HRNSE ...

Page 86: ...gest of B the longest of D E C the longest of F G N OT E L H are the length height indicated in the above chart For twin the length is the distance between the outdoor unit and the farthest indoor unit Piping length after branch pipe B C D 1 After branch pipe B C D the pipe length should be shorter than 10 m 2 All branch pipe B C D it depend of case should be balanced Twin Triple Quad B C differen...

Page 87: ...9 53 Ø15 88 TE 56N RAS 6H V RNS2E Ø9 53 Ø15 88 TE 56N TRE 06N RAS 8HRNSE Ø9 53 Ø25 4 TE 08N TRE 810N TE 08N TE 04N TE 04N RAS 10HRNSE Ø9 53 2 Ø25 4 TE 08N TE 08N TE 56N TE 56N N O T E The sizes of the indoor and outdoor units are different Adjust the flare adapter accessories to the joint part of the indoor piping Piping connection size of indoor units Indoor Unit Gas piping size mm Liquid piping ...

Page 88: ...in m B Smaller than Hin m Maximum height between indoor units Hin m H V RNS E 2 0 5 Installing distributor 1 Install the distributor supplied by HITACHI on request A tee can not be installed instead of a branch pipe Example Twin system 2 Installing the distributor Fix the branch pipe horizontally to the pillar wall or ceiling The piping must not be fixed rigidly to the wall as thermal expansion an...

Page 89: ... pipeInstall the header horizontally Example Triple Branch pipe 1 Gas piping 2 Liquid piping 3 4 5 Connecting flare adapter only for RAS 2 2 5 HVRN2 1 Liquid line 2 Flare nut Accessories 3 Pipe Accessories 4 Indoor unit 5 Flare adapter Accessories 6 Gas line 7 Pipe Field supplied 1 2 3 4 5 6 7 The piping sizes for indoor unit and outdoor unit are different Attach the flare adapter accessories at t...

Page 90: ...2 Insert the boss into the unit base and turn approximately 40 degree counterclockwise 3 The outer diameter section of the drain boss is 32 mm 4 A drain pipe should be field supplied N OT E Do not use this drain boss set in a cold area because the drain water may freeze This drain boss may not be sufficient to collect drain water If collecting a big amount of drain water should be necessary provid...

Page 91: ...lectrical wiring for the outdoor unit ES Series 88 4 3 1 Electrical wiring connection for the outdoor unit 88 4 3 2 Setting the DIP switches for the outdoor unit 89 4 4 Electrical wiring between indoor unit and outdoor unit 93 4 5 Wire sizes 95 4 5 1 Wire sizes for IVX Series 95 4 5 2 Wire sizes for ES Series 97 4 5 3 H LINK II System 99 4 6 Electrical wiring diagrams 108 4 6 1 Electrical wiring d...

Page 92: ...trical components inside the unit to prevent them getting damaged In worst cases a fire may occur Tightly secure the wires with the cord clamp inside the indoor unit N OT E In case of performing a test run operation take especially care because some security features are disabled the units will operate during 2 hours without Thermo OFF and the 3 minute guard for compressor protection will not be e...

Page 93: ... and fix the cables using the cable tie accessory As shown in next figure do not insert the cables from different sides into the ring core 1 N L2 Wire 2 L1 Wire 2 Connect the three phase power supply source wires L1 L2 L3 and N for 400V 50Hz to the terminal board Connect the ground wire to the plate in the electrical box Model RAS 4 6 HRNM2E Model RAS 8 12 HRNM 1 1 2 3 4 5 1 Signal wire 2 Earth 3 ...

Page 94: ...t of the fixing screw of the service access panel If you do so you will not be able to remove the fixing screw 1 Power wires 2 Signal wires 1 2 4 2 2 Setting the DIP switches for the outdoor unit Quantity and position of DIP switches The PCB1 see the electrical wiring diagram plane a in the outdoor unit is operated with 6 types of dip switches one rotary switch and 3 types of push switch ...

Page 95: ...without turning the power source off the contents of the setting are invalid DSW1 Test Run Function Setting position Setting before shipment Test run for cooling Test Run for heating Forced stop of compressor 1 The compressor is OFF during this operation N O TE It is possible to select the cancellation of the outdoor hot start control by pushing both PSW1 PSW3 simul taneously during 3 seconds This...

Page 96: ... set by PSW C A U TION The cancellation of the outdoor hot start control configuration could damage the compressor if it is usually used In that case the unit warranty will be void DSW3 Capacity setting Unit Setting position Unit Setting position Unit Setting position RAS 8HRNM RAS 3HVRNM2E RAS 10HRNM RAS 4HVRNM2E RAS 4HRNM2E RAS 12HRNM RAS 5HVRNM2E RAS 5HRNM2E RAS 6HVRNM2E RAS 6HRNM2E DSW4 RSW1 R...

Page 97: ...lead setting JP1 6 Setting before shipment JP1 JP2 JP3 JP4 JP5 JP6 1 0 0 1 1 1 N O TE 0 Open 1 Short circuit The function selection using the jumper lead setting is shown in the table below Setting Function Details JP1 Only for RAS 8 12 HRNM Cooling 15 ºC Heating When JP1 is set to open temperature range for cooling mode is fixed until 15 ºC Not available for individual indoor control JP2 Not used...

Page 98: ...bles from different sides into the ring core 1 N L2 Wire 2 L1 Wire 2 Connect the power supply source wires L1 and N for 230V 50Hz and L1 L2 L3 and N for 400V 50Hz to the terminal board Connect the ground wire to the plate in the electrical box RAS 2 3 HVRN S 2 RAS 4 6 HVRNS2E Model RAS 8 10 HRNSE 1 2 3 4 5 1 2 3 4 1 2 3 1 Power wires 2 PCB 3 Earth terminal 4 Side cover 5 Transmission wires 1 Trans...

Page 99: ...nt of the fixing screw of the service access panel If you do so you will not be able to remove the fixing screw 1 Power wires 2 Signal wires 1 2 4 3 2 Setting the DIP switches for the outdoor unit Quantity and position of DIP switches The PCB1 see the electrical wiring diagram plane a in the outdoor unit is operated with 6 types of dip switches one rotary switch and 3 types of push switch ...

Page 100: ...hes without turning the power source off the contents of the setting are invalid DSW1 Test Run Function Setting position Setting before shipment Test run for cooling Test Run for heating Forced stop of compressor 1 The compressor is OFF during this operation N OT E It is possible to select the cancellation of the outdoor hot start control by pushing both PSW1 PSW3 simul taneously during 3 seconds ...

Page 101: ...the outdoor hot start control configuration could damage the compressor if it is usually used In that case the unit warranty will be void DSW3 Capacity setting Unit Setting position Unit Setting position Unit Setting position Unit Setting position RAS 2HVRN2 RAS 4HVRNS2E RAS 4HRNS2E RAS 8HRNSE RAS 2 5HVRN2 RAS 5HVRNS2E RAS 5HRNS2E RAS 10HRNSE RAS 3HVRNS2 RAS 6HVRNS2E RAS 6HRNS2E DSW4 RSW1 Refriger...

Page 102: ... 10 HP 230V Setting before shipment 400V setting before shipment Jumper lead setting JP1 6 Setting before shipment JP1 JP2 JP3 JP4 JP5 JP6 1 0 0 1 1 1 N OT E 0 Open 1 Short circuit The function selection using the jumper lead setting is shown in the table below Setting Function Details JP1 Not used JP2 Not used JP3 Not used JP4 Fixing for Cooling Only When JP4 is set to open operation mode is fixe...

Page 103: ...g of other indoor units in the same refrigerant cycle If not set the automatic address function is performed N O TE Follow the local codes and regulations when performing the electrical wiring field and equipment Use twisted shielded pair wires for transmission wiring between the outdoor unit and the indoor unit and also for the transmission wiring between the indoor units in case of an H Link con...

Page 104: ...ted pair cable or shielded pair cable Power source from the outdoor unit to the indoor unit Independent power source of outdoor unit and indoor unit Operating line twisted shielded pair cable or shielded pair cable DC5V non pole transmission H LINK system DC5V non pole transmission H LINK system Indoor unit Indoor unit Outdoor unit of system no 0 Outdoor unit of system no 0 ...

Page 105: ...mm2 RAS 5HRNM2E 13 4 0 mm2 RAS 6HRNM2E 13 2 5 mm2 RAS 8HRNME 3N 380 415V 50Hz 13 2 2 5 mm2 RAS 10HRNME 17 1 4 0 mm2 RAS 12HRNME 21 2 4 0 mm2 N O TE 1 Except RPI 8 0 10 0 Follow local codes and regulations when selecting field wires The above wire sizes marked with 2 are selected at the maximum current of the unit according to the Eu ropean standard EN60 335 1 Use wires not lighter than the ordinar...

Page 106: ...Use shielded wires for transmission wires between the indoor and the outdoor units and connect the shielded part to the ground screw in the electrical box of the indoor unit as shown below Use wires not lighter than the ordinary neoprene polychloroprene sheathed flexible cord code designation H05RN F Main switches types Select the main switches current breaker in according to the next table Model ...

Page 107: ...2E 3N 400V 50Hz 13 4 0 mm2 RAS 5HRNS2E 13 4 0 mm2 RAS 6HRNS2E 13 4 0 mm2 RAS 8HRNSE 20 6 0 mm2 RAS 10HRNSE 23 6 0 mm2 N O TE 1 Except RPI 8 0 10 0 Follow local codes and regulations when selecting field wires The above wire sizes marked with 2 are selected at the maximum current of the unit according to the eu ropean standard EN60 335 1 Use wires not lighter than the ordinary neoprene polychloropr...

Page 108: ... A U TION Use shielded wires for transmission wires between the indoor and the outdoor units and connect the shielded part to the ground screw in the electrical box of the indoor unit as shown below Use wires not lighter than the ordinary neoprene polychloroprene sheathed flexible cord code designation H05RN F Main switches types Select the main switches current breaker in according to the next ta...

Page 109: ...eds Two transmission wires connecting each indoor and outdoor unit for a total of 64 refrigerant cycles Connection wiring for all indoor and outdoor units in series FSN2 E NEW PC ART CURRENT PC P2HTE RAS H V RN M S 2 E N O TE The RCI FSN 2 3 E unit can be connected to the P G23WA2 panel cutting bridge J4 In both combinations some of the functions of the indoor unit cannot be used ...

Page 110: ...its 0 63 Max number of indoor units 160 Max number of sets 200 N OT E Sets Indoor units outdoor units central control HL H LINK HL II H LINK II 2 System with indoor units outdoor units H LINK II remote control and H LINK central control Range number of refrigerant circuits 0 15 Range number of indoor units 0 15 Max number of indoor units 128 Max number of sets 145 N OT E Sets Indoor units outdoor ...

Page 111: ... 0 63 Max number of indoor units 128 Max number of sets 145 N O TE Sets Indoor units outdoor units central control HL H LINK HL II H LINK II 4 System with indoor units outdoor units H LINK and H LINK II remote control and H LINK central control Range number of refrigerant circuits 0 15 Range number of indoor units 0 15 Max number of indoor units 128 Max number of sets 145 N O TE Sets Indoor units ...

Page 112: ...connect wires for all the indoor units and all the outdoor units in series You can apply this H LINK II system to following models Indoor Unit Outdoor Unit RCI M RAS 3 12 H V RNM2 E RAS 2 10 H V RN S 2 E RDC RPI M RPK RPF RPFI RPC H LINK II features It is possible to control up to 160 indoor units 64 groups of indoor units with only one control panel using the PSC 64S controller It is possible to ...

Page 113: ...or units that can be connected 64 units per H LINK system Maximum indoor units that can be connected 4 units per cycle and 160 units per H LINK II system in case of SET FREE series will be added Maximum wiring length total 1000 m including CS NET WEB Recommended cable twist shielded pair cable or shielded pair cable with a section over 0 75 mm Voltage DC5V ...

Page 114: ...2 Using H LINK system with air conditioners with a central control device The system examples are shown below a Using H LINK system for air conditioning systems without a central control device CSNET WEB or PSC 5S Line connection for all units including Utopia and DC inverter Line connection for each floor Connection with one main line and with the branch lines for the units ...

Page 115: ... H LINK II system is usually to connect the available outdoor units In this case the CS NET WEB wiring can be connected at any point of the H LINK II wiring In case of not using a central control device when the electrical wiring is performed In this case you must connect the H LINK II wiring to all the systems Usually to connect the outdoor units is the easiest implementation to con nect them in ...

Page 116: ...4 Electrical Wiring 106 SMGB0064 rev 0 08 2011 DIP Switch setting of indoor PCB and Outdoor PCB It is required to set DIP switches of every indoor unit and outdoor unit ...

Page 117: ...in the first 16 system positions as shown in the following figure There are 42 systems 16 with FSN1E indoor units type and 26 with FSN3E indoor units type N O TE An H LINK II is capable of controlling up to 160 indoor units If using PSC 5S and CSNET WEB 2 0 only compatible with H LINK take into account that it will only recognize 16 indoor units and 16 outdoor units ...

Page 118: ...4 CP20 R111 C33 R1 JP2 CP19 QN2 R89 R112 R96 R3 R2 R67 R66 CP21 Q203 D15 J1 R65 Z1 C108 RY2 RY1 JP11 JP12 R116 R115 C112 JP6 JP4 JP5 R117 R118 C110 CB3 CB2 CB1 U V W PCN401 DCL2 DCL1 DM3 DM2 DM1 T S R CN1 CN4 CN207 CN206 CN204 CN203 CN202 RD CN201 WH PCN202 RD WH PCN201 ê ê 1 1 1 1 1 1 1 1 1 1 D5 R35 C17 D10 D9 2 NF CN2 Surface Surface W 0V 220V 240V CN6 CN2 THM7 THM9 THM8 EFS1 EFR1 PCN2 PCN5 PCN6...

Page 119: ...4 Electrical Wiring 109 SMGB0064 rev 0 08 2011 4 RAS 4 6 HVRNM2E ...

Page 120: ...4 Electrical Wiring 110 SMGB0064 rev 0 08 2011 RAS 4 6 HRNM2E ...

Page 121: ... CA CS1 2 SVA1 A2 SVF TB1 2 TF1 Solenoid valve for hot gas bypass Terminal board Transformer Thermistor for fin temperature Thermistor Surge absorber THM 7 9 ZNR THM RVR Contactor for compressor motor Reactor I F Connector Diode module Dip switch on PCB1 Fuse Inverter system power module Motor for compressor Motor for outdoor fan Micro computer control expansion valve Noise filter Printed circuit ...

Page 122: ...4 Electrical Wiring 112 SMGB0064 rev 0 08 2011 4 6 2 Electrical wiring diagrams for ES Series RAS 2 2 5 HVRN2 ...

Page 123: ...4 Electrical Wiring 113 SMGB0064 rev 0 08 2011 4 RAS 3HVRNS2 ...

Page 124: ...4 Electrical Wiring 114 SMGB0064 rev 0 08 2011 RAS 4 6 HVRNS2E ...

Page 125: ...4 Electrical Wiring 115 SMGB0064 rev 0 08 2011 4 RAS 4 6 HRNS2E ...

Page 126: ...4 Electrical Wiring 116 SMGB0064 rev 0 08 2011 RAS 8 10 HRNSE ...

Page 127: ...5 2 2 Outdoor units PCB for ES Series 123 5 3 Protection and safety control 126 5 3 1 Protection and safety control for IVX Series 126 5 3 2 Protection and safety control for ES Series 127 5 4 Standard operation sequence 128 5 4 1 Standard operation sequence for IVX Series 128 5 4 2 Standard operation sequence for ES Series 135 5 5 Standard control functions 142 5 5 1 Standard control functions fo...

Page 128: ...ed opening degree at normal control starting After ward controlled to optimize I U liquid pipe temp Tl The expansion valve opening degree is controlled according to the number of connected I U Specified opening degrees control led by temp on the top of com pressor Td Outdoor fan Fan step is operated for O U liquid pipe temp Te stabiliza tion control increased number of I U step up decreased number...

Page 129: ...MCU Relay drive circuit Electrical control expansion valve drive circuit Transmission circuit Transmission circuit Protection circuit Fan control Indoor unit MCU Transmission circuit Relay drive circuit Electrical control expansion valve drive circuit Remote control MCU Remote control switch CH1 MV MOF1 RVR SVA B F MOF2 MV MS MIF Indoor unit Outdoor unit Multiple signals Single signals Operation s...

Page 130: ...t Control range of expansion valve opening degree is deter mined to optimize I U gas pipe temp Tg I U liquid pipe temp Tl difference Specified opening degree at normal control starting After ward controlled to optimize I U liquid pipe temp Tl Specified opening degrees control led by temp on the top of com pressor Td Outdoor fan Fan step is operated for O U liquid pipe temp Te stabiliza tion contro...

Page 131: ... for compressor CT1 Current transformer MIF Motor for indoor fan PSH High pressure switch MOF1 2 Motor for outdoor fan RVR 4 Way valve MS Motor for auto louver SVA B F Solenoid valve MV Electronic expansion valve PSC Pressure switch for control CMC Compressor magnetic contactor EHW Electric heater CH Crankcase heater MCU Micro Computer ...

Page 132: ...the PCB Connector indication PCN1 Fuse PCN2 PCB1 connection from outdoor to indoor unit PCN5 Crankcase heater of compressor oil PCN6 Output optional function PCN7 Output optional function PCN8 Pressure switch protection PCN9 Compressor contactor PCN13 Pressure switch control THM7 Outdoor air temperature thermistor THM8 Pipe temperature thermistor THM9 Compressor temperature thermistor CN2 Current ...

Page 133: ... switches firstly turn off power source and set the position of the dips switches If the switches are set without turning off the power source the contents of the setting are invalid 5 2 2 Outdoor units PCB for ES Series RAS 2 3 HVRN S 2 PCB1 LED indication LED1 Red Power source for the PCB LED2 Green This LED indicates the inverter transmission status LED3 Yellow This LED indicates the transmissi...

Page 134: ...or for outdoor fan CN25 For inspection CN26 For inspection CN27 For inspection CN28 For inspection CN301 Transmission to PCB1 Switch indication DSW1 Test run DSW2 Piping length DSW3 Capacity DSW4 Ref cycle number DSW5 End terminal resistance DSW6 Optional function RSW1 Ref cycle number PSW1 Manual defrost operation switch The defrost option is manually available under the forced defrost area PSW2 ...

Page 135: ... outdoor to indoor unit Connector indication CN11 Transformer 230V CN14 Transmission between PCB1 and DIP IPM CN15 Transmission between PCB1 and DIP IPM EFS1 Power protection Switch indication DSW1 PCB1 Test run DSW2 Piping length and selection function DSW3 Capacity code DSW4 RSW1 Ref cycle number DSW5 End terminal resistor DSW6 Power source setting PSW1 2 3 Push switch on PCB N O TE The mark ind...

Page 136: ... the outdoor units RAS 3 6 H V RNM2E Model RAS 3HVRNM2E RAS 4H V RNM2E RAS 5H V RNM2E RAS 6H V RNM2E For compressor High pressure switch Cut out MPa 4 15 0 05 0 15 Cut in 3 20 0 15 For control Fuse A 1φ 230V 50Hz 40 40 50 50 3φ 400V 50Hz 2X20 2X20 2X20 CCP timer setting time min Non adjustable 3 For condenser fan motor C Automatic reset non adjustable each one for each motor Internal thermostat Cu...

Page 137: ... H V RN S 2 E Mode RAS 2 2 5 HVRN2 RAS 3HVRNS2 RAS 4HVRNS2E RAS 5HVRNS2E RAS 6HVRNS2E For compressor High pressure switch Cut out MPa 4 15 0 05 0 15 Cut in 3 20 15 For control Fuse A 1φ 230V 50Hz 25 25 40 50 50 CCP timer setting time min Non adjustable 3 For condenser fan motor C Automatic reset non adjustable each one for each motor Internal thermostat Cut out For control circuit Fuse capacity on...

Page 138: ...1 22 After power supply Temp on the top of comp Temp on the top of comp Temp on the top of comp 4 hours 2 hours 4 hours 2 hours 50 ºC 30 ºC 50 ºC 30 ºC 40 ºC 30 ºC 40 ºC 30 ºC Ta 20 ºC Ta 20 ºC I U Air intake temp COOLING operation to 1 Higher than set temp 2 ºC Lower than set temp 5 ºC 5 ºC Power to Y52C ON 1 sec Outdoor temp No Yes Outdoor fan MOF operation Test Run Hot start protection is activ...

Page 139: ...pump 60 ºC 55 ºC Power to CH ON Power to CH OFF Power to Y52C OFF Stop of MOF for unit with EHW Power to YH2 OFF Yes No RUN STOP lamp OFF DRY set fan speed set temp indication continuously ON STOP Power to I U OFF Power to O U OFF Indication LCD OFF Power to PCB in I U OFF Power to CH OFF Power to PCB in O U OFF from 1 Pressing AUTO LOUVER switch Stop of AUTO LOUVER Start of AUTO LOUVER Alternativ...

Page 140: ...dicated Indication of unit stoppage cause d1 22 After power supply Temp on the top of comp Temp on the top of comp Temp on the top of comp 4 hours 2 hours 4 hours 2 hours 50 ºC 30 ºC 50 ºC 30 ºC 40 ºC 30 ºC 40 ºC 30 ºC Ta 20 ºC Ta 20 ºC Power to YH2 ON MD ON for unit with drain pump Power to EHW ON I U Fan Operation Low I U Air intake temp DRY operation Power to MC OFF Power to MIF OFF 6 min I U f...

Page 141: ...pump 60 ºC 55 ºC Power to CH ON Power to CH OFF Power to Y52C OFF Stop of MOF for unit with EHW Power to YH2 OFF Yes No STOP Power to I U OFF Power to O U OFF Indication LCD OFF Power to PCB in I U OFF Power to CH OFF Power to PCB in O U OFF RUN STOP lamp OFF DRY set fan speed set temp indication continuously ON from 1 Pressing AUTO LOUVER switch Stop of AUTO LOUVER Start of AUTO LOUVER Alternativ...

Page 142: ...ours 2 hours 4 hours 2 hours 50 ºC 30 ºC 50 ºC 30 ºC 40 ºC 30 ºC 40 ºC 30 ºC Ta 20 ºC Ta 20 ºC I U air intake HEATING operation to 1 Higher than set temp 2 ºC Lower than set temp 25 ºC 30 ºC Lower than 25 ºC Power to CMC ON 1 sec I U air discharge temp Yes Power to MOF Power to PCB in O U ON Pressing FAN switch Air over switch HIGH indication MEDIUM indication LOW indication Power to YH2 for 20 se...

Page 143: ...n 50 ºC RUN STOP lamp OFF DRY set fan speed set temp indication continuously ON STOP Power to I U OFF Power to O U OFF Indication LCD OFF Power to PCB in I U OFF Power to CH OFF Power to PCB in O U OFF Slow fan speed I U discharge air temp Operation at Slow Speed Lower than 40 ºC After 2 min Higher than 40 ºC Shorter than 2 min Reset of timer for defrosting from 1 Pressing AUTO LOUVER switch Stop ...

Page 144: ...wer to RVR OFF DEFROST indication Power to MIF OFF Power to MOF OFF No Defrosting stop condition Defrosting operation Yes No DEFROST disappears Power to RVR ON Inverter Frequency of Comp Yes No Power to MOF ON I U intake air temp I U fan operation LOW Power to MC OFF Higher than set temp 2ºC Lower than set temp 2ºC I U intake air temp Operation at low fan speed MIF 30ºC 25ºC to 30ºC 25ºC ...

Page 145: ...5 Control System 135 SMGB0064 rev 0 08 2011 5 5 4 2 Standard operation sequence for ES Series Cooling operation Continues in the next page ...

Page 146: ...ump 60 ºC 55 ºC Power to CH ON Power to CH OFF Power to Y52C OFF Stop of MOF for unit with EHW Power to YH2 OFF Yes No RUN STOP lamp OFF DRY set fan speed set temp indication continuously ON STOP Power to I U OFF Power to O U OFF Indication LCD OFF Power to PCB in I U OFF Power to CH OFF Power to PCB in O U OFF from 1 Pressing AUTO LOUVER switch Stop of AUTO LOUVER Start of AUTO LOUVER Alternative...

Page 147: ...5 Control System 137 SMGB0064 rev 0 08 2011 5 Dry operation Continues in the next page ...

Page 148: ...ump 60 ºC 55 ºC Power to CH ON Power to CH OFF Power to Y52C OFF Stop of MOF for unit with EHW Power to YH2 OFF Yes No STOP Power to I U OFF Power to O U OFF Indication LCD OFF Power to PCB in I U OFF Power to CH OFF Power to PCB in O U OFF RUN STOP lamp OFF DRY set fan speed set temp indication continuously ON from 1 Pressing AUTO LOUVER switch Stop of AUTO LOUVER Start of AUTO LOUVER Alternative...

Page 149: ...5 Control System 139 SMGB0064 rev 0 08 2011 5 Heating operation Continues in the next page ...

Page 150: ...5 Control System 140 SMGB0064 rev 0 08 2011 ...

Page 151: ...ower to RVR OFF DEFROST indication Power to MIF OFF Power to MOF OFF No Defrosting stop condition Defrosting operation Yes No DEFROST disappears Power to RVR ON Inverter Frequency of Comp Yes No Power to MOF ON I U intake air temp I U fan operation LOW Power to MC OFF Higher than set temp 2ºC Lower than set temp 2ºC I U intake air temp Operation at low fan speed MIF 30ºC 25ºC to 30ºC 25ºC ...

Page 152: ...5 Control System 142 SMGB0064 rev 0 08 2011 5 5 Standard control functions 5 5 1 Standard control functions for IVX Series Freezing protection during cooling process or dry operation ...

Page 153: ...emperature CMC OFF Outlet air temp of I U Heating operation Is it continuous for more than 3 min Discharge air temp of indoor unit Is setting temp lower than inlet air temp of indoor unit CMC ON Compresor RUN Compressor stop Higher than 65 ºC Yes Lower than 60 ºC Yes Lower than 65 ºC Higher than 60 ºC ...

Page 154: ... 5 Normal opening of the electronic expansion valve Coling operation 480 pulse 100 Heating operation a Set of target temperature TdSH 20 25 ºC b Simulation PI control for the electronic expansion valve The electronic expansion valve opening is controlled so that the thermistor temperatures for the compressor can reach the target temperature The electronic expansion valve opening is controlled as s...

Page 155: ...5 Control System 145 SMGB0064 rev 0 08 2011 5 Activation for protection device control ...

Page 156: ... Yes Pipe surface temp of outdoor unit heat exchanger 30 ºC No Pipe surface temp of outdoor unit heat exchanger 40 ºC No Same step Step up Step down Yes Yes Pressure switch for control ON Step up Yes Is it continuous for more than 1 min No Yes Is it continuous for more than 3 min 8 12HP 5 min Yes No MOF2 MOF1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ON regulated OFF ON speed 1 ON speed 2 Fan steps Mof ...

Page 157: ...4 rev 0 08 2011 5 N O TE This sequence is for the standard operation 1 Fan step at start Outdoor temp Tao Air flow ratio Tao 2 C 15 2 C Tao 12 C 25 12 C Tao 22 C 40 22 C Tao 27 C 60 27 C Tao 32 C 80 32 C Tao 37 C 100 37 C Tao 110 ...

Page 158: ...e switch for control ON Outdoor liquid pipe temp Te same condition Pressure switch for control OFF ON VL decreased and pressure switch for control ON Is fan operated more than 3 min Is fan operated more than 3 min 110 1 step up 1 step down Yes TrL TrL1 2 ratio 100 Temp on the top of comp 95ºC No No No Yes 7 ºC 1 ºC Yes Yes Yes No 2 step down No Yes No Yes No Yes A Yes 1 Inlet air temp of indoor un...

Page 159: ...5 Control System 149 SMGB0064 rev 0 08 2011 5 MOF2 MOF1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ON regulated OFF ON speed 1 ON speed 2 Fan steps Mof 1 Mof 2 ...

Page 160: ...ormal condition Alarm 02 when the outdoor air flow is decreased by a sea sonal wind against air outlet When the CMC is ON during cooling operation PSC is ON and Tc is higher than Tc1 4 C forced thermo off operation will be performed Tc Outdoor piping temperature Tc1 Outdoor piping temperature when PSC is ON PSC ON 3 60 MPa However if it occurs more than 6 times during operation forced thermo off o...

Page 161: ...5 Control System 151 SMGB0064 rev 0 08 2011 5 5 5 2 Standard control functions for ES Series Freezing protection during cooling process or dry operation ...

Page 162: ...mperature CMC OFF Outlet air temp of I U Heating operation Is it continuous for more than 3 min Discharge air temp of indoor unit Is setting temp lower than inlet air temp of indoor unit CMC ON Compresor RUN Compressor stop Higher than 65 ºC Yes Lower than 60 ºC Yes Lower than 65 ºC Higher than 60 ºC ...

Page 163: ...c expansion valve is set at a specified opening a Specified opening during heating operation 1 minute 4 During the cooling and the defrosting operations the electronic expansion valve is set at the specified opening 5 Normal opening of the electronic expansion valve Coling operation 480 pulse 100 Heating operation a Set of target temperature TdSH 20 25 ºC b Simulation PI control for the electronic...

Page 164: ...5 Control System 154 SMGB0064 rev 0 08 2011 Activation for protection device control ...

Page 165: ...n step at start Step up Is fan operated more than 3 min No No Yes Pipe surface temp of outdoor unit heat exchanger 30 ºC No Pipe surface temp of outdoor unit heat exchanger 40 ºC No Same step Step up Step down Yes Yes Pressure switch for control ON Step up Yes Is it continuous for more than 1 min No Yes Is it continuous for more than 3 min Yes No ...

Page 166: ...8 2011 N OT E This sequence is for the standard operation 1 Fan step at start Outdoor temp Tao Air flow ratio Tao 2 C 15 2 C Tao 12 C 25 12 C Tao 22 C 40 22 C Tao 27 C 60 27 C Tao 32 C 80 32 C Tao 37 C 100 37 C Tao 110 2 Temp diference 5 C ...

Page 167: ...re switch for control ON Outdoor liquid pipe temp Te same condition Pressure switch for control OFF ON VL decreased and pressure switch for control ON Is fan operated more than 3 min Is fan operated more than 3 min 110 1 step up 1 step down Yes TrL TrL1 2 ratio 100 Temp on the top of comp 95ºC No No No Yes 7 ºC 1 ºC Yes Yes Yes No 2 step down No Yes No Yes No Yes A Yes 1 Inlet air temp of indoor u...

Page 168: ...5 Control System 158 SMGB0064 rev 0 08 2011 Preheating control of compressor ...

Page 169: ...air flow is decreased by a sea sonal wind against air outlet When the CMC is ON during cooling operation PSC is ON and Tc is higher than Tc1 4 C forced thermo off operation will be performed Tc Outdoor piping temperature Tc1 Outdoor piping temperature when PSC is ON PSC ON 3 60 MPa However if it occurs more than 6 times during operation forced thermo off operation will not be performed Cause of st...

Page 170: ......

Page 171: ... 6 O pt ional func t ions 6 Index 6 1 Outdoor units IVX and ES series 162 6 1 1 Available ports 162 6 1 2 Configuration 164 6 1 3 Description of optional input signals 165 6 1 4 Description of optional output signals 166 6 1 5 Optional functions 167 ...

Page 172: ... system has Input connector CN1 has two ports to configure two input options out of the five options the system has The system has ten optional functions that are programmed in the PCB of the outdoor unit 6 1 1 Available ports The system has the following input and output ports Content Setting of the port in the PCB of the indoor unit Remarks Outlet Inputs i1 1 2 of CN1 Contact i2 2 3 of CN1 Conta...

Page 173: ...nnect ing the JST XHP 3 connector Five wires with connectors as one set Wire control Voltage 12V DC 0 5 mm2 Wire power Voltage 230V 2 0 mm2 N O TE The connection of the input signal is only an example Keep the CN1 and CN2 wires as short as possible Do not run the wires along 230 V 400 V ac power cables separately install them at a distance of more than 30 cm The cables may intersect If you install...

Page 174: ...mption and establish an average consumption of 50 of the rate point This is very useful for installations that run 24 hours a day CN1 and CN2 6 Current control demand 75 This signal allows to regulate current consumption and establish an average consumption of 75 of the rate point This is very useful for installations that run 24 hours a day CN1 and CN2 7 Current control demand 100 This signal all...

Page 175: ...you change the input output terminal name The flowchart shown on the side reflects the changes on the 7 segment display when you press PSW2 and PSW3 3 After selecting the input output terminal name select your required function by pushing the PSW1 4 After setting the pin 6 of DSW2 to OFF the selected contents are memorized in the PCB of the outdoor unit and imme diately afterwards the function sel...

Page 176: ...this function is disconnected it becomes available again Connect the cabling and use the materials as shown in Available ports see on page 162 Current control demand 5 6 7 This is an input function that turns on when it detects that the frequency of the compressor reaches 50 75 or 100 The frequency of the compressor is determined when the maximum current reaches the established limit Connect the c...

Page 177: ...n Available ports see on page 162 Note that the contact of auxiliary relay X3 is closed when an operation signal is issued Defrost operation signal 04 This optional signal is used to pick up when defrosting turns on It is very useful to check if the indoor unit is in thermo OFF Connect the cabling and use the materials as shown in Available ports see on page 162 Note that the contact of auxiliary ...

Page 178: ... the outdoor unit is ON set the following DIP switches on the printed circuit board of the indoor unit as follows set pin 5 of DSW2 to ON Because of these settings the function selection mode becomes available and the following indication appears on the 7 segment display Fixing of demand function Available d e 1 This indicates that the fixing of demand function is available 2 By pressing push swit...

Page 179: ... If the demand function is not set at the input terminal indication this function can not be activated Indoor temperature setting for energy saving This function can be activated when the customer wants to reduce the system power consumption The setting tem perature will be increased or decreased depends if it is in cooling or heating mode Setting defrosting at low speed Using this option you can ...

Page 180: ...on start area Fixing of frequency No setting for this function is available Cool draft protection 1 This function can be activated when the minimum discharge Air temperature falls down to 8 ºC in cooling operation Outdoor fan stop and compressor frequency forcibly declines to prevent discharge air temperature from dropping Cool draft protection 2 This function can be activated when the minimum dis...

Page 181: ...units is under defrosting the other outdoor units defrosting is cancelled After one outdoor unit defrosting is completed another outdoor unit starts defrosting operation To activate this option the jumper JP5 of the outdoor unit PCB1 must be cut R407C piping If you are using conventional R410A refrigerant instead of R407C refrigerant pressure will be increased To avoid pressure increase will activ...

Page 182: ......

Page 183: ...e the test run 174 7 2 Test run procedure using the remote control switch 176 7 3 Test run procedure using the wireless remote control switch 178 7 4 Test run procedure from the outdoor unit side 180 7 5 Check list 181 7 5 1 Check list for IVX Series 181 7 5 2 Check list for ES Series 189 ...

Page 184: ... liquid line are fully open 2 Make sure that there is no refrigerant leakage The flare nuts sometimes loosen because of the vibration during the transportation 3 Make sure that the refrigerant piping and the electrical wiring belong to the same system Make sure that the setting of the unit number of DSW1 DSW6 and RSW1 of indoor units correspond to the system 4 Make sure that the setting of the DIP...

Page 185: ...utdoor DB 0 ºC and above Heating operation Indoor DB 27 ºC and below N O TE Stoppage of compressor operation The compressor is NOT available within 4 hours after turning ON the power supply Stoppage code d1 22 If the compressor should be within 4 hours turn ON the power and wait for more than 30 seconds Press PSW1 and PSW3 on the outdoor PCB simultaneously for more than 3 seconds The forced thermo...

Page 186: ...pply line are incorrect or loosened a The connection bet ween the remote control and the unit is correct b Connecting points of the remote control cable c The contact of the connectors of the remote cable d The screw fastening of each terminal board The counting number of the connected units is incorrect The setting of the unit number is inco rrect The connection of the control cables between each...

Page 187: ...s the point 3 The flickering indicator is different from the one above The unit does not start The unit starts once and then stops The connection of the thermistor or other connectors is incorrect There is tripping of the protector Check the alarm code in chapter 8 Service personnel should do the checking The operation lamp flashes 1 time 1 sec And the unit N 00 Alarm code dd and Unit code E 00 fl...

Page 188: ...eceiver of the the indoor unit flickers 0 25 seconds ON 0 25 seconds OFF Then the yellow LED turns OFF While the LED is flickering the unit will not operate because the unit is initializing 2 Set the TEST RUN mode By pressing the SET switch and the OFF TIME switch simulta neously for more than three seconds The LCD should look like the LCD on the right figure The TEST RUN mode is not operating 3 S...

Page 189: ...hortage or any other reason perform the emergency operation as follows COOL switch Press the COOL switch in order to start the cooling process Press the COOL switch again in order to stop the cooling process HEAT switch Press the HEAT switch in order to start the heating process Press the HEAT switch again in order to stop the heating process N O TE During the emergency operation the yellow LED bl...

Page 190: ...e that the indoor units start to operate in accord with the test run of the outdoor unit If you start the test run from the outdoor unit and you stop the test run from the remote control switch the test run function of the remote control switch is cancelled Howe ver the test run function of the outdoor unit is not cancelled If the more than one indoor unit is connected with one remote control swit...

Page 191: ... 6 Check the outdoor temperature Inlet DB____ C WB ____ C Outlet DB____ C WB ____ C 7 Check the refrigerant temperature Operating mode cool or heat Discharge gas temperature Td _____ C Liquid pipe temperature Te _____ C 8 Check the pressure Discharge pressure Pd _____kg cm2 G Suction pressure Ps _____kg cm2 G 9 Check the voltage Rated voltage _____V Operating voltage L1 L2______V L1 L3______V L2 L...

Page 192: ...harge pressure MPa Indoor unit temp DB ºC Outdoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Outdoor unit temp DB ºC Indoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Indoor unit temp DB ºC Outdoor unit inlet temp WBºC N OT E When ambient temperature is less than 30 ºC outdoor fan volume decrease The above curves indicate pressures under the following ...

Page 193: ... 57 Ps 0 74 0 70 0 70 0 70 0 70 Cooling 4 HP Pd 2 58 2 56 2 54 2 55 2 52 Ps 0 87 0 85 0 83 0 83 0 78 Heating Pd 2 32 2 52 2 68 2 57 2 57 Ps 0 70 0 70 0 70 0 70 0 70 Cooling 5 HP Pd 2 70 2 69 2 68 2 69 2 58 Ps 0 82 0 79 0 83 0 83 0 79 Heating Pd 2 49 2 55 2 63 2 40 2 40 Ps 0 68 0 68 0 68 0 68 0 68 Cooling 6 HP Pd 2 75 2 74 2 73 2 76 2 76 Ps 0 78 0 76 0 80 0 80 0 78 Heating Pd 2 64 2 64 2 72 2 72 2 ...

Page 194: ...or unit temp DBºC Indoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Indoor unit temp DBºC Outdoor unit inlet temp WBºC N OT E The above curves indicate pressures under the following conditions Indoor fan speed HIGH Indoor total capacity 100 compared with the capacity of the outdoor unit Connected 4 indoor units Piping length 7 5 m main piping 5m branch piping 2 5 m x 4 Do no...

Page 195: ...oor unit temp DBºC Indoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Indoor unit temp DBºC Outdoor unit inlet temp WBºC N O TE The above curves indicate pressures under the following conditions Indoor fan speed HIGH Indoor total capacity 100 compared with the capacity of the outdoor unit Connected 4 indoor units Piping length 7 5 m main piping 5 m branch piping 2 5 m x 4 Do ...

Page 196: ...or unit temp DBºC Indoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Indoor unit temp DBºC Outdoor unit inlet temp WBºC N OT E The above curves indicate pressures under the following conditions Indoor fan speed HIGH Indoor total capacity 100 compared with the capacity of the outdoor unit Connected 4 indoor units Piping length 7 5 m main piping 5 m branch piping 2 5 m x 4 Do n...

Page 197: ...y con nected Check to ensure that MV1 to CN5A is correctly connected 8 Is exp valve MV1 coil correctly connected Check to ensure that each coil is correctly mounted on the valve 9 Are the refrigeration cycle and electrical wiring system incorrectly connected Check to ensure that refrigerant is flowing into indoor units by operating one refrigerating cycle only from the outdoor unit 10 Is opening o...

Page 198: ...ntrolled by MV of each indoor units During a heating operation Td is controlled by MV1 If expansion valves are incorrectly connected correct control is not available resulting in compressor seizure depending on liquid refrigerant returning conditions or motor winding insulation failure de pending on overheating conditions 9 If the refrigeration cycle and electrical system are incorrectly connected...

Page 199: ... ____ C Outlet DB____ C WB ____ C 7 Check the temperature of the refrigerant Operating mode cooling or heating Discharge gas temperature Td _____ C Liquid pipe temperature Te _____ C 8 Check the pressure Discharge pressure Pd _____kg cm2 G Suction pressure Ps _____ kg cm2 G 9 Check the voltage Nominal voltage _____V Service voltage L1 L2______V L1 L3______V L2 L3______V Initial voltage _____V Phas...

Page 200: ...ooling operation Heating operation Discharge pressure Pd MPa Discharge pressure MPa Outdoor unit temp DB ºC Indoor unit inlet temp WBºC Discharge pressure Pd MPa Discharge pressure MPa Indoor unit temp DB ºC Outdoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Outdoor unit temp DB ºC Indoor unit inlet temp WBºC Suction pressure Ps MPa Suction pressure MPa Indoor unit temp DB º...

Page 201: ...r unit inlet temp WBºC N O TE When ambient temperature is less than 30 ºC outdoor fan volume decrease The above curves indicate pressures under the following conditions Indoor fan speed HIGH Indoor total capacity 100 compared with the capacity of the outdoor unit Connected 1indoor unit for RAS 2 6 H V RN S 2 E and connected to two indoor for RAS 8 10 HRNSE Piping length 7 5 m main piping 5m branch...

Page 202: ...0 0 81 Heating Pd 2 20 2 68 2 61 2 80 2 67 Ps 0 66 0 63 0 63 0 63 0 63 Cooling 4 HP Pd 2 83 2 91 2 92 2 92 2 91 Ps 0 88 0 82 0 77 0 79 2 Heating Pd 2 32 2 68 2 86 2 73 3 11 Ps 0 65 0 68 0 64 0 63 0 64 Cooling 5 HP Pd 2 87 2 90 2 91 2 92 Ps 0 88 0 82 0 77 0 79 Heating Pd 2 50 2 84 2 63 2 37 Ps 0 65 0 66 0 66 0 66 Cooling 6 HP Pd 2 95 3 00 2 99 Ps 0 77 0 73 0 79 Heating Pd 2 65 2 71 2 38 Ps 0 65 0 6...

Page 203: ...y con nected Check to ensure that MV1 to CN5A is correctly connected 8 Is exp valve MV1 coil correctly connected Check to ensure that each coil is correctly mounted on the valve 9 Are the refrigeration cycle and electrical wiring system incorrectly connected Check to ensure that refrigerant is flowing into indoor units by operating one refrigerating cycle only from the outdoor unit 10 Is opening o...

Page 204: ...ntrolled by MV of each indoor units During a heating operation Td is controlled by MV1 If expansion valves are incorrectly connected correct control is not available resulting in compressor seizure depending on liquid refrigerant returning conditions or motor winding insulation failure de pending on overheating conditions 9 If the refrigeration cycle and electrical system are incorrectly connected...

Page 205: ...al operation of the devices 198 8 2 Troubleshooting procedure for IVX an ES Series 204 8 2 1 Alarm code 204 8 2 2 Troubleshooting in check mode 283 8 2 3 Troubleshooting by means of the 7 segment display 290 8 2 4 Troubleshooting by means of the flashing alarm LEDs for RPK FSN2M 294 8 2 5 Cause of inverter stoppage 295 8 3 Procedure for checking each main part 299 8 3 1 Self checking procedure of ...

Page 206: ...or Unit Disconnection of the operating line between the outdoor and the indoor units Duplication of the Indoor Unit number Normal case The 7 segment display of the outdoor unit is not indicated Abnormal case If there is something wrong the 7 segment display of the outdoor unit displays the following indications Cause Indication Remarks A The indoor units are not supplied with power 03 continues to...

Page 207: ... Measure the insulation resistance Remove the cause of the short circuit and replace the fuse Failure of indoor unit fan motor Measure the insulation resistance Remove the cause of the short circuit and replace the fuse Failure of the transformer at the indoor unit side Measure the voltage at the sec ondary side Replace the transformer Disconnected cable of the remote control switch Connect the ca...

Page 208: ...use Check item Action Turn OFF the main switch RUN LED is ON and the LCD is indicated However the system does not operate For example the indoor fan the outdoor fan or the compressor does not operate Failure of the indoor unit fan motor Disconnected coil Measure the coil resistance by means of the tester Replace the Indoor unit fan motor Burnt out coil Measure the insulation resist ance Failure of...

Page 209: ...peed does not change Failure of the Discharge Air Temp Thermistor Failure of the Thermis tor Check the Thermistor by means of the self check mode 2 Replace or Correctly connect the wiring when it is abnormal Disconnected Wire of the Thermistor Failure of the Remote Control Switch Check it by means of the self check mode 1 Replace if it failed Failure of PCB for the indoor unit Replace if PCB fails...

Page 210: ...ng Remove the clogging Check the connection cord and the connector Replace the connector Is there an operation sound from the coil Replace the coil Is the thermistor on the com pressor normal Replace the thermistor Is the thermistor installed cor rectly on compressor Correctly install the thermistor Clogged strainer in the indoor unit clogging at the low pressure piping Check the temp difference a...

Page 211: ...e refrigerant after the vacuum pumping Clogging of the dis charge piping Check for clogging Remove the clogging Failure or malfunction of the expansion valve Check for clogging Remove the clogging Check the connection cord and the connector Replace the connector Is there an operation sound from the coil Replace the coil Is the thermistor on the com pressor normal Replace the thermistor Is the ther...

Page 212: ...e the fan motor Excessively low air temp through the outdoor unit heat ex changer Check for any short circuited air to the outdoor unit Remove the cause of the short circuited air Defrosting is insuffi ciently completed Check the thermistor for the defrost operation Replace the thermistor for the defrost operation Excessively high dis charge pressure Insufficient air flow to the indoor unit heat e...

Page 213: ...tacle at the outdoor fan Check the obstacles Remove the obstacles Watching condition for the heating process Wait for the switching of the 4 Way Valve 1 3 minutes If the 4 Way Valve does not switch check for insufficient refrigerant Indoor fan does not operate when the com pressor operates Discharge pressure does not increase higher than 1 5 Mpa due to the insufficient refrigerant Check the operat...

Page 214: ...supplier Power supply failure All displays disappear If the unit stops due to a power shortage it will not start again even though the power comes back on Carry out the start up operations again If the power failure lasts less than 2 sec onds the unit will start again automatically Electrical noise The displays can disappear from the screen and the unit can stop This is because the microcomputer h...

Page 215: ...g of indoor unit number Duplication of indoor unit number 38 Abnormality of protective circuit in outdoor unit Failure of indoor unit PCB incorrect wiring connection to indoor unit PCB 41 Pressure Cooling overload possible activation of high pressure device O U pipe thermistor temp is higher than 55 ºC and the compressor top temp is higher than 95 ºC O U protection device is activated 42 Heating o...

Page 216: ...ory Type of Abnormality Main cause b1 IU No setting Incorrect unit No setting Over 64 indoor units setting by no or indoor unit address 96 Sensor on KPI Unit Room temperature thermistor Failure of thermistor sensor connection 97 Outdoor temperature thermistor ...

Page 217: ... or the fan operation Phenomenon Cause Check item Action Turn OFF the main switch Activation of the float switch High Drain Level Clogging of the drainage Check the drain pan Remove the clogged foreign particles Faulty float switch Fault Check the continuity when the drain level is low Replace the float switch if faulty Faulty contacting Measure the resistance by means of the tester Fix the loosen...

Page 218: ...or running Does CMC1 ON when starting Faulty PCB1 No Yes Is the voltage 240V or 220V existing at the 1 to 3 of PCN9 during Y52C is ON No Is the protective device still operating No Does CMC1 turn ON for more than 3 seconds Yes No Faulty PCB1 Yes Yes Normal PCB1 Is the CMC1 coil broken Is the protective device still operating Yes Faulty CMC1 No Yes No Yes Remove the cause after checking 1 High pres...

Page 219: ... High Pressure Switch Faulty Pressure Switch Measure the discharge pressure Check the conti nuity after the decrease of the pressure Replace the pressure switch if faulty Insufficient Contacting Measure the resistance by means of the tester Fix the looseness Replace the connector Incorrect Connection Check the connections Repair the connections Activation of the high pres sure switch due to the ex...

Page 220: ...ckers and ALARM is displayed on the remote control switch The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm is indicated when one of safety devices is activated during compressor running ...

Page 221: ...ent Contacting Measure the resistance by means of the tester Fix the looseness Replace the connector Incorrect Connection Check the connections Repair the connections Faulty Magnet Switch Incorrect Connection Check wiring Repair connections Re place Magnet Switch Malfunction A Contact Check connections Activation of the high pres sure switch due to the excessively high discharge pressure Faulty or...

Page 222: ...on the display of the outdoor unit PCB This alarm is displayed when an abnormal operation is maintained for three minutes after the normal transmission between the indoor units and the outdoor unit Also an abnormal operation is maintained for 30 seconds after the micro computer is automatically reset The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the starti...

Page 223: ...low on PCB1 flickering more than once in 10 seconds Does the alarm occur with all the indoor units Faulty PCB1 Yes Is LED3 yellow ON even if CN2 of PCB1 is removed Yes Faulty PCB1 Check other indoor units No Check the wiring between the outdoor unit and the indoor units or the fuse EF1 for PCB1 Set correctly Faulty PCB1 1 In case that terminal resistance DSW5 1P is OFF when H Link II connection is...

Page 224: ...tance Remove the short circuit and replace the fuse Faulty solenoid coil for the magnetic switch for the comp motor Measure the resistance of coil Replace the magnetic switch and the fuse Failure of the outdoor unit fan motor Measure the resistance between the wires and the insulation resistance Replace the outdoor unit fan motor and fuse Faulty transformer Measure input voltage Replace transforme...

Page 225: ...on the display of the outdoor unit PCB This alarm is displayed when an abnormal operation is maintained for three minutes after the normal transmission be tween the indoor units and the outdoor unit Also an abnormal operation is maintained for 30 seconds after the micro computer is automatically reset The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the start...

Page 226: ...8 Troubleshooting 216 SMGB0064 rev 0 08 2011 ...

Page 227: ...ce the fuse Faulty solenoid coil for the mag netic switch for the comp motor Measure the resistance of coil Replace the magnetic switch and the fuse Failure of outdoor unit fan motor Measure the resistance between the wires and the insulation resist ance Replace the outdoor unit fan motor and fuse PCB1 Power circuit failure PCB1 Measure output voltage 1 Replace PCB1 Disconnected wires insufficient...

Page 228: ...uter is automatically reset The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the starting of the outdoor unit Is power fuse for outdoor unit EF1 or EF2 normal Replace fuse if blown No Yes Note Investigate the cause of fuse blown Disconnect CN6 of PCB1 Is LED2 green on PCB1 flashing Faulty PCB1 No Yes Reconnect CN6 of PCB1 Is LED2 green on PCB1 flashing Faulty...

Page 229: ...on No Replacing wires repairing tightening screws and incorrect wiring Power source wiring for the outdoor unit Faulty PCB PCB1 for the control PCB for the inverter Disconnected wires to PCB Check the connections Repair the wiring connections Faulty PCB Replace PCB if faulty Incorrect wiring Disconnected wires insufficient contacting Check the continuity Check for looseness of connection screws Re...

Page 230: ...ture section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm is displayed when the abnormal operation is maintained for 30 seconds after the normal transmission between the outdoor unit PCB1 and inverter PCB2 Also the abnormal operation is maintained for 30 seconds after the micro computer is automatically reset The alarm is displayed when the abn...

Page 231: ...8 Troubleshooting 221 SMGB0064 rev 0 08 2011 8 RAS 4 6 H V RNS2E 1 N O TE Regarding the checking of DC fan motor refer to section Procedure of checking other main parts for ES Series see on page 312 ...

Page 232: ...the connection No Replacing wires repairing tightening screws and incorrect wiring Power source wiring for the outdoor unit Faulty PCB PCB1 for the control PCB2 for the inverter Disconnected wires to PCB Check the connections Repair the wiring connections Faulty PCB Replace PCB if faulty Incorrect wiring Disconnected wires insufficient contacting Check the continuity Check for looseness of connect...

Page 233: ... number and the alarm code are displayed on the display of the outdoor unit PCB This alarm is displayed when the main power source phase is reversely connected or one phase is not connected RAS 4 12 H V RNM 1 E RAS 3 6 HVRNM 1 E Phenomenon Cause Check item Action Turn OFF the main switch Activation of reverse phase sensor in the outdoor unit Reverse or single phase Check it according to the electr...

Page 234: ... it Faulty PCB2 Replace it Check the wiring PCB2 and capacitors CB In case the wiring is correct replace the PCB2 Compressor stops immediately lower than 20 Hz Compressor stops when frequency increases Approx 20 Hz to 60 Hz Is the power supply voltage 230V 10 No Yes Is the voltage over 187V during operation Does the voltage fall during the operation because of the operation of other apparatus Does...

Page 235: ...ltage fall during the operation because of the operation of other apparatus Does LED201 on ISPM is ON Is the connection between ISPM and reactor PCL with capacitors CB1 2 or CMC Is the DC voltage over 460V Frequency can increase higher than 60 Hz How is the compressor operation Connect correctly Check capacitors CB1 2 Replace the capacitors Capacitors have high voltage Be extremely carefull 1 Chec...

Page 236: ... DCL or CMC Is the DC voltage over 460V Frequency can increase higher than 60 Hz How is the compressor operation Connect correctly Check capacitors CB1 2 Replace the capacitors Capacitors have high voltage Be extremely carefull 1 Check the wiring and the cable capacity Restart the operation No Yes Yes No No Yes Yes No No Yes Faulty Normal Be extremely carefull because of the high voltage N OT E 1 ...

Page 237: ... are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm code is displayed when the voltage between terminal P and N of DIP IPM is insufficient and the alarm has three occurrences in 30 minutes If the number of occurrences is smaller than two the retry operation is per formed The alarm code 06 Means...

Page 238: ...8 Troubleshooting 228 SMGB0064 rev 0 08 2011 RAS 4 6 H V RNS2E 3 340V N OT E 1 Checking procedures of IPM is indicated in item Procedure of checking other main parts for ES Series see on page 312 ...

Page 239: ... high voltage perform the high voltage discharge work refer to the item Procedure of checking other main parts for ES Series see on page 312 2 Regarding replacing or checking method for the inverter PCB refer to the item Procedure of checking other main parts for ES Series see on page 312 ...

Page 240: ...led correctly on the compressor Install it correctly No Yes Is it at cooling or heating mode when the alarm has occurred Heating operation Heating Cooling Cooling operation Check the I U expansion valve opening and the temperature on the top of the compressor by the outdoor unit PCB Check the O U expansion valve opening and the temperature on the top of the compressor by the outdoor unit PCB I U e...

Page 241: ...splayed on the display of the outdoor unit PCB This alarm code is indicated as follows When the temperature at the top of the compressor is lower than condensing temperature and indoor expansion valve opening is lower than 300 pulse for 30 minutes in cooling operation retry operation will be performed once When outdoor expansion valve opening is lower than 70 pulse for 30 minutes in heating operat...

Page 242: ... if faulty Faulty PCB Fault Replace PCB and check operation Replace PCB if faulty Disconnected Wires for Ex Valve Control Check connections Repair wiring connections Faulty Discharge Gas Thermistor Fault Measure resistance Replace thermistor if faulty Incorrect Mounting Check mounting state See Alarm Code 08 Correctly mount thermistor Incorrect Connection Check connections Remove looseness replace...

Page 243: ...r than 140 C for 5 seconds under cooling operation 1 This alarm is indicated when the temperature of the thermistor on the top of the compressor is maintained higher than 120 C for 10 minutes or higher than 140 C for 5 seconds under heating operation 1 N O TE 1 For RAS 3HVRNM2E the temperature is 115 ºC and 125 ºC in cooling and heating mode Is the thermistor on top of compressor normal Faulty the...

Page 244: ...ure section The unit number and the alarm code are displayed on the display of the outdoor unit PCB The alarm appears during cooling operation when the compressor top thermistor remains at Tdc 1 C or above for 10 minutes or at Tdc 2 C or above for 5 seconds The alarm appears during heating operation when the compressor top thermistor remains at Tdh 1 C or above for 10 minutes or at Tdh 2 C or abov...

Page 245: ...n 0 24 kΩ or cut greater than 840 kΩ during the cooling process or the heating process The system is automatically restarted when the fault is removed Phenomenon Cause Check item Action Turn OFF the main switch Faulty air inlet thermistor Fault Check the resistance Replace the thermistor if faulty Incorrect connection Check the connection Repair the wiring and the connections Faulty PCB Replace PC...

Page 246: ... are displayed on the display of the outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kΩ or cut greater than 840 kΩ during the cooling process or the heating process The system is automatically restarted when the fault is removed Phenomenon Cause Check item Action Turn OFF the main switch Faulty air outlet thermistor Fault Check the resistance Rep...

Page 247: ...alarm code are displayed on the display of the outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kΩ or cut greater than 840 kΩ during the cooling process or the heating process The system is automatically restarted when the fault is removed Phenomenon Cause Check item Action Turn OFF the main switch Faulty freeze protection thermistor Fault Check t...

Page 248: ...rm code are displayed on the display of the outdoor unit PCB This alarm code is displayed when the thermistor is short circuited less than 0 24 kΩ or cut greater than 840 kΩ during the cooling process or the heating process The system is automatically restarted when the fault is removed Phenomenon Cause Check item Action Turn OFF the main switch Faulty gas piping thermistor Fault Check the resista...

Page 249: ...han 840 kΩ during the cooling process or the heating process The system is automatically restarted when the fault is removed Phenomenon Cause Check item Action Turn OFF the main switch Faulty fresh outdoor air Econof resh thermistor Fault Check the resistance Replace the thermistor if faulty Incorrect connection Check the connection Repair the wiring and the connec tions Faulty PCB Replace PCB and...

Page 250: ...ature of the internal thermostat for the indoor fan motor is higher than 130 C Phenomenon Cause Check item Action Turn OFF the main switch Activation of the internal thermostat for the indoor unit fan motor Faulty indoor unit fan motor Measure the coil resistance and the insulation resist ance Replace the motor if faulty Faulty internal thermostat Fault Check the continuity after the fan motor tem...

Page 251: ... alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the following conditions occurs three times in 30 minutes Indoor fan rotates less than 70 rpm for 5 seconds during operation When the cause is checked by means of this flow chart confirm tha...

Page 252: ...e unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the following conditions occurs three times in 30 minutes Indoor fan rotates less than 70 rpm for 5 seconds during operation Set air flow volume Hi before starting this chec...

Page 253: ...he alarm code are displayed on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 1 kΩ or cut greater than 6 MΩ during the cooling or heating operation Phenomenon Cause Check item Action Turn OFF Main Switch Faulty top of compressor thermistor Fault Check resistance Replace thermistor if faulty Incorrect connection Check wiring to PCB1...

Page 254: ...st run mode only In the case that the thermistor is abnormal during the operation the operation continues based on the assumption that the outdoor temperature is 35 C cooling 6 C heating Is the thermistor THM7 TA connected to PCB1 Connect it No Outdoor unit ambient thermistor Yes Is the resistance of THM7 between 0 24 kΩ and 500 kΩ Faulty thermistor No Yes Faulty PCB1 90 80 70 60 50 40 30 20 10 0 ...

Page 255: ...is displayed when the thermistor is short circuited less than 0 2 kΩ or cut greater than 500 kΩ during the operation However this alarm occurs during the test run mode only In the case that the thermistor is abnormal during the operation the operation continues based on the assumption that the outdoor temperature is 35 C Cooling 6 C Heating RAS 4 10 H V RNS 1 E Phenomenon Cause Check item Action T...

Page 256: ...he thermistor check all the thermistors as shown below The evaporating thermistor during the heating process is attached to the heat exchanger as shown in the figure below If this the thermistor is faulty such as short circuit less than 0 2kΩ or cut more than 500kΩ during opera tion this alarm is displayed The position is indicated below Phenomenon Cause Check item Action Turn OFF the main switch ...

Page 257: ...pacity Phenomenon Cause Check item Action Turn OFF Main Switch Incorrect Capacity Setting of Indoor Unit Check combination of indoor units and capacity setting on PCB Correctly set dip switch DSW3 Incorrect Capacity Setting of Outdoor Unit Check capacity setting on outdoor unit PCB Correctly set dip switch DSW3 Total Indoor Unit Capacity Connected to the Outdoor Unit is Beyond Permissible Range Ch...

Page 258: ...e configured using the rotary switch RSW1 The alarm code appears when five or more indoor units are connected to one outdoor unit The alarm code appears when the indoor and outdoor unit refrigerant system and address are set to 64 or above In such a case the alarm code b1 appears on the remote control switch N OT E The alarm code may appear when H LINK system is employed for indoor outdoor unit tr...

Page 259: ...t number and the alarm code are displayed on the display of the outdoor unit PCB This alarm code is indicated when AC 220V or 240V is supplied to voltage PCN9 1 and 3 on PCB1 in the outdoor unit during CMC is opened Is 220VAC or 240VAC applied PCN9 1 and 3 during stoppage Faulty PCB1 No Check wiring connection except PCB1 Yes PCB1 is normal N14 CN15 PCN10 PCN13 PCN8 PCN9 SEG1 Y52C Y20A Y21 YCH DSW...

Page 260: ...arm code appears if approx DC12V is supplied to the DIP IPM connector see table below when the inverter operation is commanded after five seconds following activation of the remote control switch Place the tester as shown in the diagram below to check the connector of PCN401 The connector shall remain inserted DC12V will constantly be detected and disturb the diagnosis if the connector of PCN401 i...

Page 261: ...ing Replace DIP IPM N O TE For PCB self diagnosis see Page 420 of Technical Catalogue Service Manual This alarm Alarm Code 38 may appear when the operation is started if the Faston terminal of the high pres sure switch 63H1 is improperly connected or damaged open circuit fault See also Alarm Code 02 Activa tion of Outdoor Unit Protection Device ...

Page 262: ...s activated at following condition Evaporation temperature of outdoor unit is more than 55 degree and top of compressor temperature is more than 95 degree Is CMC ON Faulty PCB1 No Yes Is the voltage between PCN9 1 and 3 220V 240V No Is protection device activated No Is CMC ON Yes No Faulty PCB1 Yes Yes Check the following value by remote control switch 1 Top of compressor temperature 95ºC or less ...

Page 263: ...nection Check connections Repair connections Overcharged refrigerant Check cycle operating temp Charge refrigerant correctly Mixture of non condensable gas in refrigerant cycle Check ambient temp and pressure Recharge refrigerant after vacuum pumping Clogging of discharge piping Check for clogging Remove clogging Faulty or malfunction of expansion valve Check for clogging Remove clogging Check con...

Page 264: ...arm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB Abnormality indication will appear when the protection device is activated during compressor operation at cooling see Note with the outdoor unit evaporation temperature higher than 55 C AND the compressor top temperature higher ...

Page 265: ...8 Troubleshooting 255 SMGB0064 rev 0 08 2011 8 RAS 4 6 H V RNS2E ...

Page 266: ...8 Troubleshooting 256 SMGB0064 rev 0 08 2011 RAS 8 10 HRNSE ...

Page 267: ...nection Check connections Repair connections Overcharged Refrigerant Check cycle operating temp Charge refrigerant correctly Mixture of Non Condensable Gas in Refrigerant Cycle Check ambient temp and pressure Recharge refrigerant after vacuum pumping Clogging of Discharge Piping Check for clogging Remove clogging Faulty or Malfunction of Expansion Valve Check for clogging Remove clogging Check con...

Page 268: ... PCB This alarm code is indicated when the protection device is activated at following condition Liquid refrigerant piping temperature of indoor unit is more than 55 ºC and top of compressor temperature is more than 95 ºC Is CMC ON Faulty PCB1 No Yes Is the voltage between PCN9 1 and 3 220V 240V No Is protection device activated No Is CMC ON more than 3 seconds Yes No Faulty PCB1 Yes Yes Check the...

Page 269: ...tions Faulty of outdoor fan control Check decreasing air flow volume at pressure switch for control activative Replace thermistor for evaporating temp if faulty Faulty of pressure switch for control Check activated pressure and connecting wire Replace it if pressure switch for control is faulty Overcharged refrigerant Check cycle operating temp Charge refrigerant correctly Mixture of non condensab...

Page 270: ...and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB Abnormality indication will appear when the protection device is activated during compressor operation at heating see Note with the outdoor unit evaporation temperature higher than 55 C and the compressor top temperature higher than 95 C...

Page 271: ...8 Troubleshooting 261 SMGB0064 rev 0 08 2011 8 RAS 8 10 HRNSE ...

Page 272: ...ncorrect Connection Check connections Repair connections Faulty of Outdoor Fan Control Check decreasing air flow volume at pressure switch for control activative Replace thermistor for evaporating temp if faulty Faulty of Pressure Switch for Control Check activated pressure and connecting wire Replace it if pressure switch for control is faulty Overcharged Refrigerant Check cycle operating temp Ch...

Page 273: ...n Turn OFF Main Switch Faulty indoor unit liquid refrigerant temp thermistor Faulty outdoor unit evaporating temp thermistor Fault Check resistance Replace thermistor if faulty Incorrect Connection Check wiring to PCB Repair wiring and connections Faulty PCB Outdoor Unit Indoor Unit Replace PCB and check operation Replace PCB if faulty Excessively Low Suction Pressure in Vacuum Liquid Line Stop Va...

Page 274: ...7V during operation Yes Is it 170V single phase or 340V 3 phases or more during operation when other devices are operating Yes Is the compressor running current the same as rated current Yes Check the capacity and wiring of the power source Check the fan Check for clogging at heat exchanger Check the stop valves and expansion valve Check the compressor Restart expansion valve Charge refrigerant co...

Page 275: ...alarm code are displayed on the display of the outdoor unit PCB In the case that the evaporating temperature Cooling Liquid Refrigerant Piping Temp of Indoor Unit Heating Evaporating Temp of Outdoor Unit is lower than 37 C 250 350 kΩ and the thermistor on top of compressor is higher than 90 C for 10 minutes retry operation is performed 3 minutes after compressor stoppage However when the state occ...

Page 276: ...e compressor is maintained at 15 18 Hz after the compressor is started one of the absolute values of the running current at each phase U U V and V is less than 1 5 A including 1 5A Before the compressor is operated at the end of position control the current wave value is less than 5 0 A Group A RAS 2 3 HVRN 1 E S Group B RAS 3 6 HVRNM S E RAS 5 6 HRNM1E RAS 4 6 HVRNS1E Group C RAS 8 12 HRNM RAS 8 ...

Page 277: ...uit between phase lines replace the compressor Yes Yes Faulty No No Check the PCB2 Good Replace IPM or Dip IPM Replace IPM and PCB2 Coat the silicon grease to all the touched face between the IPM and the radiated fin fully 4 Is the silicon grease coated all over between the IPM or Dip IPM and the radiated fin Good Yes Is the heat exchanger of outdoor unit clogged Remove clogging Replace the PCB2 F...

Page 278: ... ISPM such as short circuited grounded overcurrent or control voltage decrease Turn off power disconnect U V W from compressor terminals and restart Does the protecting function activate 2 Check the transistor module 1 Check the compressor If there is a short circuit between phase lines replace the compressor Yes Yes Faulty No No Replace the transistor module Good Yes Is the heat exchanger of outd...

Page 279: ...ects the abnormal operation 7 times or more than 7 times in 30 minutes The retry operation is performed six times Conditions The abnormal current to the inverter PCB or DIP IPM such as short circuited grounded overcurrent or control voltage decrease RAS 4 6 HVRNS1E N O TE 1 Regarding replacing or checking method for the DIP IPM refer to section Procedure of checking other main parts for ES Series ...

Page 280: ...rease N OT E 1 Perform the high voltage discharge work by referring to the item Procedure of checking other main parts for ES Series see on page 312 before checking and replacing the inverter components 2 Regarding replacing or checking method for inverter components refer to the item Procedure of checking other main parts for ES Series see on page 312 3 Turn ON the No 1 switch of the dip switch D...

Page 281: ...ormed twice Conditions When the temperature of the thermistor for inverter fin excess 100 C RAS 4 12 HRNM 2 E or 80 C RAS 3 6 HVRNM2E 3 times in 30 minutes this alarm is indicated and the operation is stopped In the case the occurrence is smaller than 2 times retry is performed No Replace the dipIPM ISPM IPM 1 Restart the operation Does it trip soon Yes Remove the clogging Is the heat exchanger of...

Page 282: ...ayed when the inverter fin temperature increases the abnormal value three times within 30 min utes The retry operation is performed twice Conditions When the temperature of the thermistor for inverter fin excess 80 ºC RAS 4 6 HVRNS2E or 100 ºC RAS 8 10 HRNSE 3 times in 30 minutes this alarm is indicated and the operation is stopped In the case the occurrence is smaller than 2 times retry is perfor...

Page 283: ...he unit number and the alarm code are displayed on the display of the outdoor unit PCB In case that the abnormality of alarm code 55 occurs four times within 30 minutes the alarm code of abnormality occurred for the fourth time is indicated Retry operation is performed up to third time of abnormality occurrence Conditions When the transmitting abnormality occurs between dipIPM or IPM and PCB2 this...

Page 284: ...alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB This alarm is displayed when below condition is activated 3 times including 3 in 30 minutes Retry operation is per formed up to the occurrence of 2 times Condition of Activation When the PCB1 does not receive the frequency signal from Inverter Module this ala...

Page 285: ...layed when the following phenomenon occurs 3 times in 30 minutes including 3 Retry operation is performed up to the occurrence of 2 times Actual frequency from PCB2 is less than 10 Hz after inverter frequency output form PCB1 Condition of Activation This alarm is indicated when PCB2 is not performed normally RAS 8 10 HRNSE N O TE 1 Regarding replacing or checking method for the inverter components...

Page 286: ... No 1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the compressor After troubleshooting turn OFF the No 1 switch of the dip switch DSW1 on PCB2 4 Use the silicon grease provided as accessory Service Parts No P22760 ...

Page 287: ...cated The abnormality occurs when the fan motor is stopped Yes This alarm is indicated due to detected overcurrent by the contrary wind This is normal Does the motor run Remove the foreign matter Does the fan stop by the foreign matter Check to remove the connector connection of CN15 on PCB1 and CN201 CN202 PCN201 PCN203 on PCB5 Faulty Restart operation No Alarm code is not indicated Yes No Are th...

Page 288: ...nit PCB The fan motor stops when the revolution output from the fan motor is 20 rpm for RAS 2 3 HVRN S 2 10 rpm for RAS 4 10 H V RNS 2 E or lower during 30 seconds after the fan motor activation The alarm is indicated when the abnormality is repeated 4 times for RAS 2 3 HVRN S 2 10 times for RAS 4 10 H V RNS 2 E within 5 minutes after the first detection N OT E In the case that the fan motor does ...

Page 289: ...ted on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the unit No and alarm code are indicated on the display of the outdoor unit PCB1 This alarm is indicated when the thermistor detects inverter fin temperature greater than 100 C or less than 10 C during the cooling operation or heating operation ...

Page 290: ...tically restarted when the fault is removed Is THM1 connected to intake of PCB Connect it No Yes Is the resistance of THM1 between 0 24kΩ and 840kΩ Faulty thermistor No Yes Faulty PCB Phenomenon Cause Check item Action Turn OFF the main switch Faulty air inlet thermistor Fault Check the resistance Replace the thermistor if faulty Incorrect connection Check the connection Repair the wiring and the ...

Page 291: ...omatically restarted when the fault is removed Is THM2 connected to intake of PCB Connect it No Yes Is the resistance of THM2 between 0 24kΩ and 840kΩ Faulty thermistor No Yes Faulty PCB Phenomenon Cause Check item Action Turn OFF the main switch Faulty air inlet thermistor Fault Check the resistance Replace the thermistor if faulty Incorrect connection Check the connection Repair the wiring and t...

Page 292: ...normality 02 Tripping of protection device in outdoor unit 07 Decrease in discharge gas superheat 08 Increase in discharge gas temperature 41 Cooling overload 42 Heating overload 47 Low pressure decrease protection activating You can check these alarms using the check mode 1 Follow the action that is indicated in each alarm chart You can clear these alarms only by turning OFF the main switch to th...

Page 293: ...te control in the following cases 1 When the RUN LED is flickering 2 To trace back the cause of the malfunction after restarting from the stoppage while the RUN LED is flickering 3 To check during the normal operation or during the stoppage 4 To monitor the inlet air temperature and the discharge air temperature ...

Page 294: ...8 Troubleshooting 284 SMGB0064 rev 0 08 2011 ...

Page 295: ... remote sensor C 6 Outdoor unit ambient temp C 7 Indoor unit heat exchanger gas pipe temp C 8 Outdoor unit evaporating temp during heating C 9 Control information 10 Discharge gas temp at the top of the comp chamber C 11 Thermo temp of the remote control switch Thermistor is open circuited or PCB is defective Thermistor is short circuited or PCB is defective Indication of the category code Indicat...

Page 296: ...e heater Note 1 Indication of micro computer input output 12 Micro computer input output in indoor unit 13 Micro computer input output in outdoor unit Indication of unit stoppage cause 14 Cause of stoppage Abnormal operation occurrence counter 15 Abnormal operation occurrence counter 16 Instantaneous power failure occurrence counter in indoor unit 17 Transmission error occurrence counter between r...

Page 297: ...n other indoor unit thermo off 22 Hot start after 4 hours switch on the outdoor unit 24 Cold draft protection 2 N O TE Explanation of Terms Thermo ON A condition where an indoor unit is requesting the compressor to operate Thermo OFF A condition where an indoor unit is not requesting the compressor to operate Even if stoppage is caused by Alarm 02 is not always displayed If the transmission betwee...

Page 298: ...8 Troubleshooting 288 SMGB0064 rev 0 08 2011 ...

Page 299: ... Compressor pressure frequency indication 9 Discharge pressure high x 0 1 MPa 10 Suction pressure low x 0 01 MPa 11 Control information 12 Operating frequency Hz Indication of the category code Indication of the temperature etc Corresponds to check mode 1 Corresponds to check mode 1 Corresponds to check mode 1 Corresponds to check mode 1 Corresponds to check mode 1 Corresponds to check mode 1 Corr...

Page 300: ...nit 3 Auto addressing starts Checking method by 7 segment display Operating conditions and each part of refrigeration cycle can be checked by 7 segment and push switches PSW on the PCB in the outdoor unit During checking data do not touch the electric parts except for the indicated switches because 220 240 V 400 V in case of RAS 4 6 HRN M S 2E RAS 8 12 HRNM and RAS 8 10 HRNSE is applied to them Pa...

Page 301: ... 100 00 flashes Temperature at the top of compressor 08 8 d 82 00 142 ºC In case that temperature is higher than 100 ºC the last two digits flash Evaporating temperature at heating 09 8 E 3 19 80 ºC Ambient air temperature 10 8 o 12 19 80 ºC Cause of stoppage at in verter 11 i8 9 See table at the next page Inverter fin temperature 12 8 f 82 10 100 ºC Inverter fin temperature 13 A1 10 0 199 ºC Inve...

Page 302: ... Decrease 6 Over Voltage 7 Abnormal Transmission 8 Abnormal Current Detection 9 Instantaneous Power Failure Detection 11 Reset of Micro Computer for Inverter 12 Earth Fault Detection from Compressor 13 Open Phase Detection 14 Inverter Malfunction 15 Inverter Malfunction 16 Inverter Malfunction 17 Transmission Error 18 Abnormal Current Detection 19 Abnormal Protective Device N OT E To finish checki...

Page 303: ... to Inverter Voltage Decrease Retry due to Inverter Overvoltage 19 Other Retry 20 Different Operation Mode between Indoor Outdoor Units Only for Individual Twin Triple Quad Types 21 Forced Thermo OFF Only for Simultaneous Twin Triple Quad Types 22 Forced Thermo OFF During Compressor Pre heating 24 Thermo OFF during Energy Saving Operation Mode Cancellation of Forced Thermo OFF Turn ON the power so...

Page 304: ...m 02 Unit protection This alarm is activated when the blinks sequence is two times ON two seconds OFF Alarm 03 Transmission error This alarm is activated when the blinks sequence is three times ON two seconds OFF Alarm 04 Inverter outdoor unit error This alarm is activated when the blinks sequence is four times ON two seconds OFF For the rest of the alarms the blink sequence is one second ON one s...

Page 305: ...rotection Device Activation 63H1 02 19 Protection Detection Device Abnormality 38 Protection control code on 7 segment display 1 Protection control code is displayed on 7 segment when a protection control is activated 2 Protection control code is displayed while function is working and goes out when released 3 When several protection control are activated code number with higher priority will be i...

Page 306: ...on control is indicated Retry indication disappears if the stop signal comes from all rooms Code Protection control P 7 Inverter Retry P 8 N OT E The protection control code being indicated on 7 segment display is changed to an alarm code when the ab normal operation occurs Also the same alarm code is indicated on the remote control switch Activating condition of protection control code For follow...

Page 307: ...equency Decrease In case of Demand Control Setting Pb Low Pressure Decrease Protection Low Pressure Switch for Control is activated Frequency Decrease PC Cold Draft Protection TO 10 ºC and ε 2 6 Frequency Decrease ε Pd 0 1 Ps 0 1 TO Outlet Temperature of Indoor Unit P7 Inverter Retry Automatic Stoppage of Transistor Module Activation of Electronic Thermal or Abnormal Current Sensor When activating...

Page 308: ... 4 5 6 8 10 Current A 10 5 16 0 24 0 24 0 17 5 20 0 4 HP 230V 400V Demand setting 3 4 5 6 8 10 Current A 100 11 5 13 0 17 0 20 0 8 5 11 0 75 8 5 10 0 13 0 15 0 6 0 8 0 50 5 5 6 5 8 5 10 0 4 0 5 0 5 HP 230V 400V 3 4 5 6 8 10 Current A 8 0 12 0 15 0 18 5 13 0 13 0 ...

Page 309: ...he following troubleshooting procedure for testing the PCB in the indoor unit and outdoor unit If you are using a wireless remote control switch with the built in receiver part of the wall type indoor unit and you need to perform the above checking perform the following procedure 1 Turn OFF the power supply 2 Disconnect the connector CN25 on PWB M 3 Connect the PC ART ...

Page 310: ...he remote control switch and the indoor unit ADDS RN In this troubleshooting procedure checking of the following parts of the PCB is not available PCB in Indoor Unit Relay circuit DIP switch option circuit fan circuit protection circuit PCB in Outdoor Unit Relay circuit DIP switch option circuit If this troubleshooting is performed in the system by means of the central station the indication of th...

Page 311: ...ge 6 The LCD indication changes as shown below The remote control switch automatically starts to check the transmission circuit 5 The LCD indication changes as shown below Depress all the switches 13 switches one by one Every time the switch is depressed the number of the indication of A part in the figure below increases one by one NOTES 1 Any order of depressing switches is available Depressing ...

Page 312: ...mote control switch is activated again the RUN indicator is ON and the operation is started Therefore depress switch and stop operation NOTES 1 In case that the operation is not automatically started when the remote control switch is activated again the detection circuit for momentary stoppage may be abnormal However it would not interfere the normal operation There is a case that the operation is...

Page 313: ...Turn ON the main power switch Check Mode starts Refer to the next page a Analog Test b Relay Test 5 After finishing the self checking procedure turn OFF the power and reset the DIP switch as before Self checking procedures in the check mode for RPK FSN2M Check item State of mode Confirmation method A Initialize Exp valve and auto louver Exp Valve fully open fully closed Auto louver is horizontally...

Page 314: ...re that no high voltage exists If LED201 is ON after start up and LED201 is OFF after turning OFF power source the voltage will decrease lower than DC50V b Connect connecting wires to an electrical soldering iron c Connect the wires to terminals P and N on DIP IPM Discharging is started resulting in hot soldering iron Pay at tention not to short circuit between terminal P and N d Wait for 2 or 3 m...

Page 315: ...er to U V and W of transistor module measure the resistance If all the resistances are from 1 to 5kΩ it is normal b By touching the side of the tester to the P terminal of transis tor module and the side of tester to U V and W of transistor module measure the resistance If all the resistances are greater than 100kΩ it is normal c By touching the side of the tester to the N terminal of transis tor ...

Page 316: ...al b By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances are greater than 500kΩ it is normal c By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances...

Page 317: ...turn the fan motor shaft by hand Normal Fan motor shaft turns smoothly Faulty No continuous rotary torque movement felt when turning the motor by hand This occurs because the internal magnet of the fan motor breaks the movement when the internal electronic circuit of the fan motor has a short circuit fault 2 Measure the fan motor resistance using a tester Measurement procedure 1 Remove the fan mot...

Page 318: ...breakage based on or several Ω several kΩ or 0Ω or 3 Coil resistance of electrical parts Lower fan motor Part Name Model Fan motor model Rated power Wiring diagram Lead wire color Resistance Ω at 20 Outdoor unit lower fan motor RAS 8 10 HRNM SC121HSA 120W Black Blue Main winding Thermo Auxiliary winding Red Orange White Bet Black White Bet Blue Red Bet Black Blue 23 3 10 0 8 10 12 8 10 RAS 8 12 HR...

Page 319: ...the side of the tester to R and S of ISPM measure the re sistance If all the resistances are more than 100 kΩ it is normal e By touching the side of the tester to the P terminal of ISPM and the side of the tester to U V and W of ISPM measure the resistance If all the resistances are more than 1 kΩ it is normal f By touching the side of the tester to the P terminal of ISPM and the side of the teste...

Page 320: ...d the outlet temperature of the expansion valve decreases after the cooling process starts Locked fully open It is abnormal under the following conditions after the heating process for more than 30 minutes the discharge gas temperature of the compressor is not 10 C higher than the condensing temperature and there is no other faults such as an excessive charge of refriger ant and others Other parts...

Page 321: ... Check to ensure that refrigerant is flowing into indoor units by operating one refrigerating cycle only from the outdoor unit 10 Is opening of exp valve completely closed locked Check the following by the check mode of outdoor units 1 Liquid Pipe Temp TL Air Intake Temp Ti during Cooling Operation 2 Liquid Pipe Temp TL Air Intake Temp Ti during Heating Operation 11 Is opening of exp valve fully o...

Page 322: ... de pending on liquid refrigerant returning conditions or motor winding insulation failure depending on overheating condi tions 9 If the refrigeration cycle and electrical system are incorrectly connected abnormally low suction pressure operation is maintained or abnormally high discharge pressure operation is maintained resulting in giving stress to the compres sor since their correct control is ...

Page 323: ... voltage will decrease lower than DC50V b Connect connecting wires to an electrical soldering iron c Connect the wires to terminals P and N on DIP IPM Discharging is started resulting in hot soldering iron Pay at tention not to short circuit between terminal P and N d Wait for 2 or 3 minutes and measure the voltage once again Check to ensure that no voltage is charged 1 DIP IPM 2 Plug 3 Electrical...

Page 324: ...h of the tester to DIP IPM 52C terminal and to DIP IPM R S terminals to measure the resistance Normal if all three terminals have 100 kΩ or greater 3 Touch of the tester to of DIP IPM DMI soldered part and of the tester to DIP IPM R S terminals to measure the resistance Normal if all three terminals have 1 kΩ or greater 4 Contrary to 3 touch of the tester to of DIP IPM DMI and of the tester to DIP...

Page 325: ...inals to measure Non faulty if 9 13 are checked and satisfied Measure with 1 kΩ range of a tester 1 2 Internal Circuit of ACT Part of Inverter Module 1 External Appearance and Internal Circuit of Transistor Module NOTE DO NOT use a digital tester 1 9 Check items 1 8 10 Touch of the tester to DIP IPM DCL2 terminal and to P of ISPM DIP IPM soldered part to measure the resistance Normal if all three ...

Page 326: ...l solder bit c Connect the wires to terminals P and N on IPM Discharging is started resulting in hot solder bit Pay attention not to short circuit between terminal P and N d Wait for 2 or 3 minutes and measure the voltage once again Check to ensure that no voltage is charged 1 Solder bit 2 Plug 3 Connecting wires 4 Transistor module IPM 1 2 3 4 1 Drive circuit 2 Overheating protection circuit 3 Se...

Page 327: ... it is normal c By touching the side of the tester to the N terminal of transis tor module and the side of tester to U V and W of transistor module measure the resistance If all the resistances are from 1 to 5kΩ it is normal d By touching the side of the tester to the N terminal of tran sistor module and the side of tester to U V and W of transistor module measure the resistance If all the resista...

Page 328: ... to the terminals 3 NOs of the diode module measure the resistance If all the resistances are greater than 500kΩ it is normal c By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances are from 5 to 50kΩ it is normal ...

Page 329: ...f all the resistances are greater than 500kΩ it is normal Checking procedure for the ISPM Rectification parts of internal circuit of ISPM Common Remove all the terminals of the ISPM before check If items a to h are performed and the results are satisfactory ISPM is normal Measure it under 1 kΩ range of a tester C AUTION Perform the high voltage discharge procedure as de scribed Do not use a digita...

Page 330: ...he side of the tester to R and S of ISPM measure the re sistance If all the resistances are more than 100 kΩ it is normal e By touching the side of the tester to the P terminal of ISPM and the side of the tester to U V and W of ISPM measure the resistance If all the resistances are more than 1 kΩ it is normal f By touching the side of the tester to the P terminal of ISPM and the side of the tester...

Page 331: ...SPM DIP IPM damage which may result from operation combined with a faulty fan motor check also if the fan motor is not damaged when ISPM DIP IPM is replaced C AUTION For the shake of safety turn OFF the power before start working Working checking with the power ON may disturb correct diagnosis and may result in failure Models for ES DC motor s included in different models Model Pieces RAS 2 2 5 HV...

Page 332: ...ending on the type of the tester any tester can be used to determine any short circuit or breakage based on or several Ω several kΩ or 0Ω Other parts Part name Unit models Model code Resistance Ω Drain up motor RCI 1 0 FSN3E RCIM 1 5 5FSN2 RPI 2 0 6 0FSN3E ADP 1403 139 00 at 21 ºC RCD 1 0 6 0FSN2 KJV 1004 347 00 at 20 ºC Solenoid gas for gas bypass RAS 4 6 HVRNS2E RAS 8 10 HRNSE 105 52 52 50Hz 154...

Page 333: ...s exp valve MV1 correctly connected Check to ensure that MV1 to CN5A is correctly connected 8 Is exp valve coil MV1 correctly connected Check to ensure that each coil is correctly mounted on the valve 9 Are the refrigeration cycle and electrical wiring system incorrectly connected Check to ensure that refrigerant is flowing into indoor units by operating one refrigerating cycle only from the outdo...

Page 334: ...ctrical wave becomes unstable giving stress to the motor winding resulting in winding insulation failure 7 8 During a cooling operation SH is controlled by MV of each indoor units During a heating operation Td is controlled by MV1 If expansion valves are incorrectly connected correct control is not available resulting in compressor seizure depending on liquid refrigerant returning conditions or mo...

Page 335: ...9 Spare Parts 325 SMGB0064 rev 0 08 2011 9 Spar e P art s 9 Index 9 1 Spare parts for IVX Series 326 9 2 Spare parts for ES Series 341 ...

Page 336: ...9 Spare Parts 326 SMGB0064 rev 0 08 2011 9 1 Spare parts for IVX Series RAS 3HVRNM2E Cycle and structural parts ...

Page 337: ... 14 Special Nut 15 Condenser Assembly Heat exchanger 15 1 15 2 15 1 Header L Assy Assembly 15 2 Header G Assy Assembly 16 Attaching Plate Not included in 15 17 End Plate Assy 18 Partition Plate 19 Accumulator 20 4 way valve assy Assembly 20 1 D Pipe Assy Assembly 20 1 1 Pressure Switch PSC Control 20 1 2 Pressure Switch PSH High 20 1 3 Silencer 20 2 EVO Assy Assembly 20 2 1 Expansion Valve EVO 20 ...

Page 338: ...el Plates Components Harness 2 P Plate Assy Assembly 2 1 2 9 2 1 Reactor 2 2 Noise Filter 30A 2 3 Magnetic Contactor 2 4 Spacer For Noise Filter 2 5 Transformer TF 2 6 Fuse 40A 2 7 Terminal Board TB 2 8 Printed Circuit Board PCB Main PO052 Assy 2 9 Holder For PCB Main 3 Power Unit Assy 3 1 Inverter Fin Assy DIP IPM 17A ...

Page 339: ...9 Spare Parts 329 SMGB0064 rev 0 08 2011 9 RAS 4 6 HVRNM2E Cycle and structural parts ...

Page 340: ... Heat exchanger 19 1 19 2 19 Condenser Assembly Heat exchanger 19 1 19 2 19 1 Pipe L Assy Assembly 19 1 1 EVO Assy Assembly 19 1 1 1 Expansion Valve EVO 19 1 1 2 Strainer 19 2 Header G Assy Assembly 20 Attaching Plate Not included in 19 21 End Plate Assy Not included in 19 22 Partition Plate 23 Accumulator Assy Assemby 24 4 way valve assy Assembly 24 1 SVA Assy Assembly 24 1 1 Solenoid Valve SVA 2...

Page 341: ... 2 Terminal Board TB 2 3 Transformer TF 2 4 Printed Circuit Board PO081 Assy 2 5 Noise Filter NF1 2 6 Reactor Unit DCL 2 7 Fuse Holder 2 8 Fuse 50A 2 9 Mag Contactor CMC1 2 10 Spacer For Noise Filter 2 12 Spacer For PCB1 2 13 Push Spacer For PCB1 3 Power Unit Assy Assembly 3 1 3 2 3 1 Power Stay Assy 3 2 Inverter Fin Assy 5 6 HP DIP IPM 25A 4 HP DIP IPM 17A 4 Stay ...

Page 342: ...9 Spare Parts 332 SMGB0064 rev 0 08 2011 RAS 4 6 HRNM2E Cycle and structural parts ...

Page 343: ...ut 18 Rubber Cap 19 Condenser Assembly Heat exchanger 19 1 19 2 19 1 Pipe L Assy Assembly 19 1 1 EVO Assy Assembly 19 1 1 1 Expansion Valve EVO 19 1 1 2 Strainer 19 2 Header G Assy Assembly 20 Attaching Plate Not included in 19 21 End Plate Assy Not included in 19 22 Partition Plate 23 Accumulator Assy Assemby 24 4 way valve assy Assembly 24 1 SVA Assy Assembly 24 1 1 Solenoid Valve SVA 24 2 Press...

Page 344: ...9 Spare Parts 334 SMGB0064 rev 0 08 2011 Electrical parts ...

Page 345: ...Terminal Board TB 2 3 Transformer TF 2 4 Printed Circuit Board PO081 Assy 2 5 Noise Filter NF1 2 6 Reactor Unit DCL 2 7 Fuse Holder 2 8 Fuse 2 x 20A 2 9 Mag Contactor CMC1 2 10 Spacer For Noise Filter 2 12 Spacer For PCB1 2 13 Push Spacer For PCB1 3 Power Unit Assy Assembly 3 1 3 2 3 1 Power Stay Assy 3 2 Inverter Fin Assy 5 6 HP DIP IPM 25A 4 HP DIP 1IPM 17A 4 Stay ...

Page 346: ...8 2011 RAS 8 12 HRNM Cycle and structural parts U34 U34 U30D U27B U27A U21A U21B U30A U71B U71A U77A U77B U30C U01A U01B U79 U81 U77B U77E U42 U28 U55 U51 U01C U30B U77C U77D U40A U40B U15B U15A U58 U15C U78 U70 U32B U32A U98A U98B U51 ...

Page 347: ...Thermistor U15C Thermistor U15D Thermistor U16A Noise filter U16B Noise filter U17 Transistor module U18 Diode module U21A Exp valve coil for U21B Exp valve U27A Stop valve U27B Stop valve U28 Check joint U30A Strainer U30B Strainer U30C Strainer U30D Strainer U32A Vibration absorber U32B Vibration absorber U34 Air grille Air outlet U40A Condenser assembly U40B Condenser assembly U42 Check valve U...

Page 348: ... Parts 338 SMGB0064 rev 0 08 2011 Electrical parts View from P U82A U72 U74C View from Q U04 U16A U65B U85E U16B U65C U65A Q U85B U14B U82B U85C U85D U65B U65A U65C P U74A U74B U18 U14A U14A U17 U65D U15D U85A ...

Page 349: ...pare Parts 339 SMGB0064 rev 0 08 2011 9 Electrical parts cont U82A U72 U74C U18 U15D U65D U85A U17 U14A P U65A U65C U65B U85C U85D U82B U14B U65B U16A U04 View from P Drawing number SPN200617 RAS 8 12HRNM ...

Page 350: ...r U74C Resistor U77A Solenoid valve U77B Solenoid valve U77C Solenoid valve U77D Solenoid valve U77E Solenoid valve U78 Oil heater U79 Four way valve assy U81 Coil for 4 way valve U82A Reactor U82B Transformer U85A Printed circuit board For inverter P U85B Printed circuit board Fan control U85C Printed circuit board For control U85D Printed circuit board Fan control U85E Printed circuit board Phas...

Page 351: ...MGB0064 rev 0 08 2011 9 9 2 Spare parts for ES Series RAS 2 2 5 HVRN2 Cycle structural and electrical parts U01A U34A U81 U01B U40 U82 U71 U48 U38 U51 U70 U78 U28 U21B U34B U15A U21A U79 U15C U15B U32A U27B U27A U32B U89 ...

Page 352: ...Expansion valve U21B Coil for expansion valve U27A Stop valve Gas line U27B Stop valve Liquid line U28 Check joint U32A Vibration absorber U32B Vibration absorber U34A Air grille Outlet U34B Air grille Inlet U38 Piping set U40 Condenser assembly U48 Electrical box assembly U51 Propeller fan U70 Compressor U71 Motor U78 Oil heater U79 Four way valve assembly U81 Coil for 4 way valve U82 Transformer...

Page 353: ...343 SMGB0064 rev 0 08 2011 9 RAS 3HVRNS2 Cycle structural and electrical parts U01A U34A U81 U01B U40 U82 U98B U71 U98E U48 U51 U70 U78 U28 U21B U34B U04 U98A U15A U98C U21A U79 U15C U15B U32A U27B U27A U32B U89 U98D ...

Page 354: ... expansion valve U27A Stop valve Gas U27B Stop valve Liquid U28 Check joint U32A Vibration absorber U32B Vibration absorber U34A Air grille Outlet U34B Air grille Inlet U38 Piping set U40 Condenser assembly U48 Electrical box assembly U51 Propeller fan U70 Compressor U71 Motor U78 Oil heater U79 Four way valve assembly U81 Coil for 4 way valve U82 Transformer U89 Accumulator U98A Cabinet panel U98...

Page 355: ...9 Spare Parts 345 SMGB0064 rev 0 08 2011 9 RAS 4 6 HVRNS2E Cycle structural ...

Page 356: ...ger 18 1 18 2 18 1 Header L Assy Assembly 18 2 Header G Assy Assembly 18 2 Header G Assy Assembly 18 2 1 EVO Assy Assembly 18 2 1 1 Expansion Valve EVO 18 2 1 2 Strainer 19 Attaching Plate Not included in 18 20 Stay Not included in 18 21 Condenser Support 22 End Plate Assy 23 Partition S Plate 24 Accumulator Assembly 25 4 Way Valve Assy Assembly 25 1 SVA Assy Assembly 25 1 1 Solenoid Valve SVA 25 ...

Page 357: ...9 Spare Parts 347 SMGB0064 rev 0 08 2011 9 Electrical parts ...

Page 358: ...2 Terminal Board TB 2 3 Transformer TF 2 4 Printed Circuit Board PO081 Assy 2 5 Noise Filter NF1 2 6 Reactor Unit DCL 2 7 Fuse Holder 2 8 Fuse 50A 2 9 Mag Contactor CMC1 2 10 Spacer For Noise Filter 2 12 Spacer For PCB1 2 13 Push Spacer For PCB1 3 Power Unit Assy Assembly 3 1 3 2 3 1 Power Stay Assy 3 2 Inverter Fin Assy 5 6 HP DIP IPM 25A 4 HP DIP IPM 17A 4 Stay ...

Page 359: ...9 Spare Parts 349 SMGB0064 rev 0 08 2011 9 RAS 4 6 HRNS2E Cycle structural ...

Page 360: ...ly Heat exchanger 18 1 18 2 18 1 Header L Assy Assembly 18 2 Header G Assy Assembly 18 2 1 EVO Assy Assembly 18 2 1 1 Expansion Valve EVO 18 2 1 2 Strainer 19 Attaching Plate Not included in 18 20 Stay Not included in 18 21 Condenser Support 22 End Plate Assy 23 Partition S Plate 24 Accumulator Assembly 25 4 Way Valve Assy Assembly 25 1 SVA Assy Assembly 25 1 1 Solenoid Valve SVA 25 2 Pressure Swi...

Page 361: ...9 Spare Parts 351 SMGB0064 rev 0 08 2011 9 Electrical parts ...

Page 362: ...Terminal Board TB 2 3 Transformer TF 2 4 Printed Circuit Board PO081 Assy 2 5 Noise Filter NF1 2 6 Reactor Unit DCL 2 7 Fuse Holder 2 8 Fuse 2 x 20A 2 9 Mag Contactor CMC1 2 10 Spacer For Noise Filter 2 12 Spacer For PCB1 2 13 Push Spacer For PCB1 3 Power Unit Assy Assembly 3 1 3 2 3 1 Power Stay Assy 3 2 Inverter Fin Assy 5 6 HP DIP IPM 25A 4 HP DIP IPM 17A 4 Stay ...

Page 363: ...9 Spare Parts 353 SMGB0064 rev 0 08 2011 9 RAS 8 10 HRNSE Cycle and structural ...

Page 364: ...al Nut 19 Rubber Cap 20 Condenser For RAS 8HRNSE Assembly Heat exchanger 20 1 20 2 20 1 Header G Assy Assembly 20 2 Header L Assy Assembly 20 2 1 EVO Assy Assembly 20 2 1 1 Expansion Valve EVO 20 2 1 2 Strainer 21 Condenser For RAS 10HRNSE Assembly Heat exchanger 21 1 21 2 21 1 Header G Assy Assembly 21 2 Header L Assy Assembly 22 Coil for EVO 22 Attaching Plate Not included in 20 21 23 Attaching ...

Page 365: ...064 rev 0 08 2011 9 No Part name Remarks 30 Valve Stay 31 Valve Stay Not included in 27 32 Thermistor TA Air 33 Thermistor TE Piping 34 Thermistor TD Compressor 35 Thermo Attaching Plate 36 Condenser Support 37 Accessory Pipe ...

Page 366: ...9 Spare Parts 356 SMGB0064 rev 0 08 2011 Electrical parts ...

Page 367: ...13 3 1 Power Plate 3 2 Radiation Fin 3 3 Diode Module DM 3 4 Transistor Module IPM 3 5 Printed Circuit Board PCB for Inverter PV041 3 6 Plastic Material Collar 3 7 Plastic Material Bush 3 8 Plastic Material Spacer 3 9 Thermistor Fin Thermistor 3 10 Capacitor Assy Harness PC301 3 11 Noise Suppressor ZNR Assy 3 12 Capacitor For RAS 8HRNSE 440V AC 6 µF 3 13 Capacitor For RAS 10HRNSE 440V AC 7 5 µF 5 ...

Page 368: ......

Page 369: ... IVX series 361 10 2 1 Outdoor unit RAS 3HVRNM2E 361 10 2 2 Outdoor units RAS 4 6 H V RNM2E 372 10 2 3 Oudoor units RAS 8 12 HRNM 385 10 3 Servicing for ES Series 401 10 3 1 Outdoor Units RAS 2 2 5 HVRN2 and RAS 3HVRNS2 401 10 3 2 Outdoor Units RAS 4 6 H V RNS2E 408 10 3 3 Outdoor Units RAS 8 10 HRNSE 420 ...

Page 370: ... all electrical maintenance Do NOT touch the electrical components when the LED201 Red on the inverter PCB is ON to avoid electrical shock N OT E All compressors are connected by brazing Check to ensure whether there are flammable things around or not when using a burner for pipe connections if not oil existing pipe inside may ignite Do not expose the refrigerant cycle to the atmosphere for a long...

Page 371: ... fixing screws 2 Slide the service cover downward and remove it 3 Pay attention of not falling off the service cover 1 Service cover 1 Removing bottom service cover and rear cover 1 Remove five 5 screws which fix the bottom service cover Pull and remove the bottom service cover 2 Remove the upper cover following Removing service cover see on page 361 3 Remove seven 7 screws which fix the rear cove...

Page 372: ... cover according to the section Removing service cover see on page 361 in this chapter 2 Remove the air outlet grille according to the section Removing air outlet grille see on page 362 in this chapter 3 Remove the upper cover according to the section Removing upper cover see on page 362 in this chapter 4 Disassemble the fan blade by removing the cap nuts and washers fixing the fan blade onto the ...

Page 373: ...e check to ensure that the colors of the connectors on the PCN202 are matched with the wires Fix the air outlet grille firmly to the shroud Fan components and technical features Power supply 230V 50Hz Fan motor DC fan motor DPI IPM PCN202 1 3 PCN202 2 3 4 Screw for motor fixing DC Fan Motor M4 Screw with spacer x 4 Removing the compressor 1 Remove the service cover and the lower part of the servic...

Page 374: ...cover 2 Rear panel 3 Check joint 4 Rear pipe cover 5 Crankcase heater 6 Valve Stay 1 2 3 4 5 6 4 Remove the rubber cap and the thermistor on the top of the compressor 1 Sound proof cover 2 Oil heater 3 Cut part A Direction to remove the cover 3 2 1 A ...

Page 375: ...wer case 1 2 3 4 5 6 7 8 9 A 1 Thermistor holder 2 Holder 3 Td Thermistor 4 Thermistor fixing plate 5 Rubber cap Th Thermistor 6 Indication of terminal number 7 Terminal box cover 8 Compressor 9 Compressor wires 10 Fix it with screw 11 Compressor wires 3 wires A Details for compressor terminals ...

Page 376: ...ge pipe from the compressor Isolate the wires and electrical components to protect them from the burner flame when brazing the connection pipes 7 Remove the two 2 nuts fixing the compressor and remove the compressor from the unit by lifting it Slightly incline it forward and lift 8 For brazing the compressor connection pipes first cool down the compressor piping side covering it with wet cloth The...

Page 377: ... plate Do not touch the electrical components when LED201 Red located on the W surface PCB is ON in order to avoid an electrical shock Removing reversing valve coil 1 Remove the service cover according to the section Removing service cover see on page 361 in this chapter 2 Open the P mounting plate according to the section Opening electrical box P mounting plate see on page 367 in this chapter D A...

Page 378: ...ons Removing service cover see on page 361 and Removing bottom service cover and rear cover see on page 361 in this chapter 2 Collect the refrigerant from the check joint according to the section Removing the compressor see on page 363 3 Remove the reversing valve coil according to the section Removing reversing valve coil see on page 367 4 Remove one 1 fixing screw for the valve mounting plate 5 ...

Page 379: ...n valve EV0 2 Brazing part 5 Reassemble the parts in the reverse order of removing pro cedures 1 2 Remove solenoid valve 1 Remove the service cover and the rear service panel according to the sections Removing service cover see on page 361 and Removing bottom service cover and rear cover see on page 361 described in this chapter 2 Collect the refrigerant from the check joint according to the secti...

Page 380: ... this chapter Disconnect all the connectors in the PCB Remove the PCB by sliding four 4 holders in the arrow direction Remove the PCB for power distribution of the compressor and the motor To remove the PCB slide the four 4 holders in the arrow direction 1 Holder 4 pcs 2 PCB1 for control 2 Removing the relay PCB Remove the service cover according to the section Removing service cover see on page 3...

Page 381: ...ly strong force to the electric components and PCBs to avoid damage Removing other electrical components 1 Remove the service cover according to the section Removing service cover see on page 361 in this chapter 2 Open the P mounting plate by rotating it to the left according to the section Opening electrical box P mounting plate see on page 367 in this chapter 3 Check to ensure the LED201 Red of ...

Page 382: ...gn particles do not expose open to atmos phere for long periods If necessary seal pipe ends using caps or tape 1 Remove the four 4 fixing screws 2 Slide the service cover downward and remove it 3 Pay attention of not falling off the service cover 1 Service cover 1 Remove air outlet grille 1 Remove the eight 8 fixing screws 2 Lift the air outlet grille holding the lower parts 3 Release the extruded...

Page 383: ...Lower part of service cover 4 Fixing portion for outdoor temperature thermistor 5 Air inlet grille rear side 6 Pull 1 2 2 3 4 5 6 N O TE The length of fixing screws for the outdoor temperature thermistor is different than all other screws in the machine as an assembly poka yoke Removing outdoor fan motor 1 Remove the service cover according to the section Removing service cover see on page 372 in ...

Page 384: ...IPM PCN202 1 3 PCN202 2 3 4 AC Fan Motor DOWN DIP IPM PCN201 1 3 PCN201 2 3 4 Screw for motor fixing DC Fan Motor UP 4 x M4 screw with spacer AC Fan Motor DOWN 4x M4 screws with spacer Motor clamp and wiring fixing position 1 2 3 4 5 1 Motor clamp 2 Fan motor lead wire 3 Plastic tie 4 DC Fan Motor UP 5 DC Fan Motor DOWN 5 Remove the fan motor connector from the PCN202 and PCN203 at the electrical ...

Page 385: ... connectors on the PCN201 and PCN202 are matched with the wires Fix the air outlet grille firmly to the shroud Removing the compressor 1 Remove the service cover and the lower part of the service panel according to the section Removing service cover seeonpage 372 and thesection Removing the lower partofservice panel and rear panel see on page 373 In case thatthe outdoor unit is installed close to ...

Page 386: ...e the cover 3 2 1 A 1 Thermistor holder 2 Holder 3 Td Thermistor 4 Thermistor fixing plate 5 Rubber cap Th Thermistor 6 Indication of terminal number 7 Terminal box cover 8 Compressor 9 Compressor wires 10 Fix it with screw 11 Compressor wires 3 wires A Details for compressor terminals 1 2 3 4 5 6 7 8 9 A ...

Page 387: ...cts and liquids when performing piping brazing work 6 Remove the suction pipe and the discharge pipe from the compressor Isolate the wires and electrical components to protect them from the burner flame when brazing the connection pipes 7 Remove the two 2 nuts fixing the compressor and remove the compressor from the unit by lifting it Slightly incline it forward and lift 8 For brazing the compress...

Page 388: ...pe 3 Cover pipes with wet cloth 4 See compressor position table below 5 Vibration Proof rubber 2 6 Nut and washer 7 Vibration Proof rubber 1 Fixation of the compressor to the bottom plate Compressor position 1 2 3 4 Vibration proof rubber 1 x x x x Vibration proof rubber 2 x x Nut x x ...

Page 389: ...itch and control pressure switch from the brazing neck using a burner 1 Upper cover 2 Rear cover 3 Electrical box 4 Brazing part 5 Pressure switch for control PSC 6 Discharge pipe 7 High pressure switch PSH 1 2 3 4 4 5 6 7 Opening electrical box P mounting plate 1 Remove the service cover according to the section Removing service cover see on page 372 in this chapter Remove the six 6 screws fixing...

Page 390: ...2 in this chapter 2 Open the P mounting plate according to the section Opening electrical box P mounting plate see on page 379 in this chapter 1 2 3 1 2 1 PCB 2 Upper cover 3 Rear cover 1 Reversing valve coil 2 SVA RAS 4 6 HVRNM2E RAS 4 6 HRNM2E 1 2 1 2 1 PCN7 SVA Solenoid valve 2 PCN6 RVR Reversing valve coil 1 PCN7 SVA Solenoid valve 2 PCN6 RVR Reversing valve coil N OT E Do not touch the electr...

Page 391: ...on page 372 and Removing the lower part of service panel and rear panel see on page 373 in this chapter 2 Collect the refrigerant from the check joint according to the section Removing the compressor see on page 375 3 Remove the reversing valve coil according to the section Removing the coils for reversing and solenoid valve SVA1 SVA2 and SVF see on page 380 4 Remove one 1 fixing screw for the val...

Page 392: ...ing flame 1 Expansion valve EV0 2 Brazing part 5 Reassemble the parts in the reverse order of removing proce dures 1 2 Removing solenoid valve 1 Remove the service cover and the rear service panel according to the sections Removing service cover see on page 372 and Removing the lower part of service panel and rear panel see on page 373 described in this chapter 2 Collect the refrigerant from the c...

Page 393: ...apter Disconnect all the connectors in the PCB Remove the PCB by sliding four 4 holders in the arrow direction Remove the PCB for power distribution of the compressor and the motor To remove the PCB slide the four 4 holders in the arrow direction 1 Holder 4 pcs 2 PCB1 for control 2 Removing the relay PCB Remove the service cover according to the section Removing service cover see on page 372 in th...

Page 394: ...r damages will occur Check to ensure that the electrical wires will not be caught between the assembled electrical components and the mounting plates when the W electrical components surface is reassembled D A N GER Identify the terminal numbers with mark band When reassembling the terminals have to be connected to the correct numbers If incorrectly connected malfunctions or damages will occur In ...

Page 395: ...e magnetic contactor CMC1 Remove the two 2 screws fixing the magnetic contactor and remove the magnetic contactor Remove the four 4 screws fixing the reactor and remove the reactor DCL Disconnect all the wires connected with the noise filter NF1 Remove the noise filter by clamping the top of the holder 6 portions with a pincher Identify the terminal numbers with mark band When reassembling the ter...

Page 396: ...fixing screws 2 Lift the air outlet grille holding the lower parts 3 Release the extruded hook of the air outlet grille from the shroud 1 Air outlet grille 2 Shroud 1 2 Removing upper cover 1 Remove the eleven 11 screws fixing the upper cover 2 Lift the upper cover upwards 1 Upper cover 1 ...

Page 397: ... The length of fixing screws for the outdoor temperature thermistor is different than all other screws in the machine as an assembly poka yoke Removing outdoor fan motor 1 Remove the service cover according to the section Removing service cover see on page 385 in this chapter 2 Remove the air outlet grille according to the section Removing air outlet grille see on page 386 in this chapter 3 Remove...

Page 398: ...with the cable tie or the cord clamp If not it may cause the disconnection of the fan motor s lead wire 7 In order to avoid cutting edges mount the rubber bush at the partition plate when inserting the motor wire through it If not it may cause the disconnection to the fan motor s lead wire N O TE When assembling the motor ensure the cables section directly downwards Fix the protection tube edge en...

Page 399: ...ation cover wrapped around the compressor and remove the terminal box cover at the compres sor fixed by one 1 screw Disconnect the compressor wires in the terminal box and remove the sound insulation cover 1 Upper Cover 2 Check joint 3 Rear panel 4 Crankcase heater 5 Rear pipe cover 6 Valve stay N O TE Check and take note of each terminal number and indica tions for its correct connection at the r...

Page 400: ...Thermistor holder 2 Holder 3 Td Thermistor 4 Thermistor fixing plate 5 Rubber cap Th Thermistor 6 Indication of terminal number 7 Terminal box cover 8 Compressor 9 Compressor wires 10 Fix it with screw 11 Compressor wires 3 wires A Details for compressor terminals ...

Page 401: ...rge pipe from the compressor Isolate the wires and electrical components to protect them from the burner flame when brazing the connection pipes 7 Remove the two 2 nuts fixing the compressor and remove the compressor from the unit by lifting it Slightly incline it forward and lift 8 For brazing the compressor connection pipes first cool down the compressor piping side covering it with wet cloth Th...

Page 402: ...ving service cover see on page 385 in this chapter 2 Collect the refrigerant from the check joint according to the sec tion Removing the compressor see on page 389 in this chapter 3 Disconnect the fasten terminals from the pressure switches Cut the high pressure switch 63H1 and control pressure switch 63H2 from the brazing neck using a burner 1 Upper cover box 2 Rear cover 3 Electrical box 4 Brazi...

Page 403: ...4 5 6 7 D A NGE R Check that the LED201 red located on the W surface PCB is OFF when opening the P mounting plate Do not touch the electrical components when LED201 Red located on the W surface PCB is ON in order to avoid an electrical shock Removing the coils for the reversing and solenoid valves SVA1 SVA2 and SVF 1 Remove the service cover according to the section Removing service cover see on p...

Page 404: ...al box P mounting plate see on page 393 in this chapter D A N GER Check that the LED201 red located on the W surface PCB is OFF when opening the P mounting plate Do not touch the electrical components when LED201 Red located on the W surface PCB is ON in order to avoid an electrical shock 3 Remove the CN5A connector on the control PCB of the electrical box 4 Hold the expansion valve coil and sligh...

Page 405: ...ve Protect the connecting wires and pipe insulation from the brazing frame 7 Remove the reversing valves from its assemblies 4 brazed parts 8 Perform the brazing with a blowtorch remove and reassemble the reversing valve by cooling the pipes first with wet cloth in order to avoid brazing material entering the reversing valve 9 Reassemble the parts in the reverse order of removing procedures contai...

Page 406: ... valve coil according to the section Removing the coils for the reversing and solenoid valves SVA1 SVA2 and SVF see on page 393 in this chapter 4 Remove the brazing and flare nuts as shown in the figure Using a blowtorch and previously cooling the pipe side with wet cloth in order to avoid brazing material entering the reversing valve Solenoid Valve SVA1 2 brazing parts Solenoid Valve SVA2 2 brazi...

Page 407: ...age 385 in this chapter Disconnect all the connectors in the PCB Remove the PCB by sliding four 4 holders in the arrow direction Remove the PCB for power distribution of the compressor and the motor To remove the PCB slide the four 4 holders in the arrow direction 1 Holder 4 pcs 2 PCB1 for control 2 Removing the relay PCB Remove the service cover according to the section Remo ving service cover se...

Page 408: ... damages will occur Correctly insert two wires of U and V phases for the power cable of inverter compressor into the current sensor CTU and CTV on PCB2 Connect Phase U power cable with the current sensor CTU and CTV on PCB2 Connect the Phase U power cable with the current sensor Phase U CTU and Phase V power line with current sensor Phase V CTV If connected incorrectly malfunction or electrical co...

Page 409: ...diode module Remove the two 2 screws fixing the diode module Remove the diode module from the electrical box 2 Disconnect all the wirings connected to the transistor module as shown below Disconnect the wirings of connector CN2 CN206 and CN207 Disconnect the wirings from P N U V W on the transistor module Remove the three 3 screws fixing the PCB2 and then remove the PCB2 from the transistor module...

Page 410: ...e W surface PCB is ON in order to avoid an electrical shock N OT E Disconnect all the wires connected with the smoothing capacitor CB CB1 CB2 CA The wire has polar characters Identify the wire mark band and the indication on the smoothing capacitor when wire connecting Remove the two 2 screws fixing the smoothing capacitor and remove the smoothing capacitor Disconnect all the wires connecting with...

Page 411: ...ver 1 Removing front cover 1 Remove the pipe cover following Removing pipe cover see on page 401 2 Remove three 3 fixing screws and remove the upper cover 3 To remove the front cover remove eight 8 fixing screws and three 3 left nails 1 1 2 1 Upper cover 1 Front cover 2 Nails Removing outdoor fan 1 Remove the pipe cover following Removing pipe cover see on page 401 2 Remove three 3 fixing screws a...

Page 412: ...ving the compressor N OT E Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust into the cycle Be sure to replace the compressor immediately after removing Seal to the suction and discharge pipes when the refrigerant cycle is left unattached for a prolonged time Remove the cap of new compressor right before the replacement Before mounting the compressor...

Page 413: ...the thermistor on top of the compressor Check the wiring color and layout when disconnecting Connecting wires in wrong order at reassembling may result in compressor damage 1 Compressor Top Thermistor Mount onto Terminal Cover with Metal Fitting 2 Yellow 3 White 4 Red 5 Terminal cover 6 M5 nut 1 2 3 4 5 6 6 Remove the suction and discharge pipes from the compressor Be sure to separate the blazing ...

Page 414: ...ead wires 1 1 2 2 3 4 5 6 7 1 Compressor 2 Accumulator 3 Push nut 4 Vibration proof rubber 5 Two push nuts 6 Three vibration proof rubber 7 Accumulator Removing high pressure switch and pressure switch for control 1 Remove the pipe cover following Removing pipe cover see on page 401 2 Remove three 3 fixing screws and remove the upper cover 3 Remove the front cover following Removing front cover se...

Page 415: ...trol PCB of the electrical box 1 PCN6 Connector Green 6 Remove one 1 fixing screw to remove the 4 way valve coil 1 4 way valve 2 4 way valve coil 3 Screw N O TE DO NOT touch electrical components while the LED1 Red is ON to avoid electrical shock Wait until the LED turns off 3 1 2 Removing electronic expansion valve coil 1 Remove the pipe cover following Removing pipe cover see on page 401 2 Remov...

Page 416: ...alve coil 2 Expansion valve body N OT E DO NOT touch electrical components while the LED1 Red is ON to avoid electrical shock Wait until the LED turns off Removing electrical components Removing Electrical Box 1 Remove the pipe cover following Removing pipe cover see on page 401 2 Remove three 3 fixing screws and remove the upper cover 3 Remove the electrical box cover 4 Remove one 1 fixing screw ...

Page 417: ... to bend or apply much force onto PCB in order to avoid PCB failure N O TE 1 To connect wiring at reassembling ensure that the terminal numbers and wiring mark band codes are matched Incorrect wiring may result in malfunction or damage of electrical components 2 Different dip switch setting shall be applied for each model when the electrical box is replaced See chapter 8 Troubleshooting 3 Pay atte...

Page 418: ...he entire electrical box must be replaced DO NOT touch electrical components while the LED1 Red is ON to avoid electrical shock Wait until the LED turns off 10 3 2 Outdoor Units RAS 4 6 H V RNS2E Removing service cover N OT E Follow the procedure below to remove main parts and components For mounting follow the reverse procedure of removal Do not expose the refrigerant cycle to the atmosphere for ...

Page 419: ...ree 3 upper and lower fixing screws Pay attention not to drop the service cover 1 Service cover 1 Remove outlet grille 1 Remove four 4 screws which fix the outlet grille 1 Air outlet grille 2 Shroud 1 2 Removing upper cover 1 Remove the upper cover upward after removing nine 9 fixing screws 1 Upper cover 1 ...

Page 420: ...ear cover eight 8 screws for two fan models the inlet grill is fixed with four 4 Pull backward and remove the rear cover 1 2 3 1 2 3 1 Outlet grille 2 Rear cover 3 Bottom service cover 1 Outdoor air thermistor attachment 2 Inlet grille 3 Rear cover Removing outdoor fan motor 1 Remove the service cover following Removing service cover see on page 408 2 Remove the outlet grille following Remove outl...

Page 421: ...g screws 4x M4 screws 4x M6 screws with spacer 1 2 3 4 1 Motor clamp 2 Plastic tie 3 Wire 4 Motor N O TE 1 To mount the motor be sure to place the lead wire outlet downward Adjust the propeller fan and shroud not to contact with each other 2 Fix the motor lead wire onto the motor clamp using a plastic tie as shown in the table on the previous page to avoid obstructing the propeller fan 3 Mounting ...

Page 422: ...coil from the solenoid valve Removing solenoid valve coil 20A see on page 418 4 Remove the Faston terminals of high pressure switch and the pressure switch for control from the switch body 5 Remove connectors on the control PCB THM7 Outdoor Air THM8 Piping THM9 Compressor top PCN5 Crankcase Heater 6 Remove connectors on the DIP IPM CN202 7 Remove the compressor power wire from the compressor 8 To ...

Page 423: ...cting wires in wrong order at reassembling may result in compressor damage 6 Remove the rubber cap and the thermistor attached on top of the compressor 7 Remove the crankcase heater 1 2 3 4 5 6 N OTE Compressor piping must be connected by brazing MAKE SURE that any flammable material is not around before heating with burner for the oil inside the piping may flame up Do not expose the refrigerant c...

Page 424: ...Thermistor holder 2 Holder 3 Td Thermistor 4 Thermistor fixing plate 5 Rubber cap Th Thermistor 6 Indication of terminal number 7 Terminal box cover 8 Compressor 9 Compressor wires 10 Fix it with screw 11 Compressor wires 3 wires A Details for compressor terminals ...

Page 425: ...ny abnormality Ensure the pull out force greater than 20 Nm If the Faston ter minal is identified faulty replace with a new one b Ensure the fixture of the lead wires 1 2 3 4 5 6 7 1 Suction pipe 2 Discharge pipe 3 Cover pipes with wet cloth 4 See compressor position table below 5 Vibration Proof rubber 2 6 Nut and washer 7 Vibration Proof rubber 1 Fixation of the compressor to the bottom plate Co...

Page 426: ...r clockwise approximately 90 Check that the LED201 red on the inverter PCB PCB2 is OFF when opening P mounting plate 1 P Plate 2 Upper cover 3 Screw 4 Two 2 screws 1 2 3 4 4 D A N GER DO NOT touch electrical components while the LED201 Red is ON to avoid electrical shock Wait until the LED turns off Removing four way valve coil 1 Remove the service cover following Removing service cover see on pag...

Page 427: ...eck that the LED201 red on DIP IPM is OFF when the P plate is opened 3 Disconnect the CN5A connector on the control PCB of the electrical box 4 Hold the coil of the expansion valve and pull out upward The expansion valve coil is equipped with a lock mechanism Ensure that the coil is locked when replacing 1 Expansion valve coil 2 Unlock 3 Pull out upward 1 2 3 D ANGER DO NOT touch electrical compon...

Page 428: ...moving electrical components Removing control PCB 1 Remove the service cover following Removing service cover see on page 372 2 Remove all the wiring connected to the control PCB 3 Move the four 4 holders to the direction marked with the arrow and remove the PCB 1 Holder 2 Control PCB 3 Transformer 4 Terminal board 5 P Plate 1 2 3 4 5 6 D A N GER DO NOT touch the electrical components on the PCB P...

Page 429: ...iation fin 1 Four 4 screws 2 DIP IPM 1 2 Removing other electrical components 1 Remove the service cover following Removing service cover see on page 408 2 Open the P plate turning counter clockwise approximately 90 following Opening electrical box P plate see on page 416Check that the LED201 red on DIP IPM is OFF when the P plate is opened D ANGER DO NOT touch electrical components while the LED1...

Page 430: ... and components For mounting follow the reverse procedure of removal Do not expose the refrigerant cycle to the atmosphere for a long period to avoid moisture or dust entering into the cycle Be sure to replace parts immediately after removing Seal the refrigerant cycle when left unattached for a long period 1 Remove the four 4 fixing screws slide the service cover downward and remove Pay attention...

Page 431: ...ver and remove the upper cover upward 1 Upper cover 1 Removing the bottom service cover and rear cover 1 Remove five 5 screws fixing the lower part of service cover and remove the lower part of service cover by pulling towards front side 2 Remove the upper cover according to the item Removing upper cover see on page 421 3 Remove eight 8 screws fixing panel and remove the rear panel by pulling in t...

Page 432: ...g Removing air outlet grille see on page 421 3 Remove the upper cover following Removing upper cover see on page 421 4 To remove the propeller fan remove the cap nut and washer which fix the propeller fan onto the motor shaft Use a puller when the propeller fan and motor shaft are fixed too tightly 1 1 2 3 4 1 Upper cover 1 Fan motor lead wire 2 Motor clamp 3 Fan motor 4 Screw with spacer 5 Remove...

Page 433: ...n motor lead wires 2 When mounting the motor ensure the cables point directly downward Fix the protection tube edge downward to ensure the water may not keep in it Adjust the clearance between shroud and propeller fan so that they do not contact 3 Fix the motor wires onto the motor clamp with a plastic tie to prevent them from obstructing the propeller fans 4 Mounting Propeller Fan Insert the skid...

Page 434: ... Removing service cover see on page 420 2 Remove the upper cover following Removing upper cover see on page 421 3 Remove four 4 screws which fix the electrical box 4 Pull up and remove the electrical box 1 Electrical box 2 Upper cover 3 Compressor 1 2 3 N OT E Wiring must be removed to dismount the electrical box 1 Remove the 4 way valve coil from the 4 way valve Removing four way valve coil see o...

Page 435: ...o the partition plate Removing the compressor 1 Remove the service cover upper cover bottom service cover and rear cover following Removing service cover see on page420Removinguppercover seeonpage421andRemovingthebottomservicecoverandrearcover seeonpage421 When the outdoor unit is installed close to a wall remove the refrigerant piping and move the unit from the wall 2 Remove the electrical box fo...

Page 436: ...of cover 2 Oil heater 3 Cut part A Direction to remove the cover 1 Thermistor holder 2 Holder 3 Td Thermistor 4 Thermistor fixing plate 5 Rubber cap Th Thermistor 6 Indication of terminal number 7 Terminal box cover 8 Compressor 9 Compressor wires 10 Fix it with screw 11 Compressor wires 3 wires A Details for compressor terminals 1 2 3 4 5 6 7 8 9 A 3 2 1 A ...

Page 437: ...es are matched Incorrect wiring numbers may result in inverse rotation and damage of the compressor 8 Remove the suction pipe and discharge pipe from the compressor Isolate the wires and electrical components to protect from the burner flame at brazing 9 Remove two 2 nuts fixing the compressor and remove the compressor from the unit by lifting in the condition of slightly inclining forward 10 When...

Page 438: ...g service cover see on page 420 2 Collect the refrigerant from the check joint according to the section Removing the compressor see on page 425 a Pull out the Faston terminals b Remove the high pressure switch PSH and pressure switch for control PSC from the brazing part of the dischar ge pipe 1 Upper cover 2 Rear cover 3 Electrical box 4 Brazing part 5 Pressure switch for control PSC 6 Discharge ...

Page 439: ...over 2 P Plate 3 Screw 4 Two 2 screws 5 Electrical box view from top 6 P Mounting plate 7 Opening direction of P Mounting Plate 1 2 3 4 5 6 7 D ANGER DO NOT touch electrical components while the LED201 Red is ON to avoid electrical shock Wait until the LED turns off Removing reversing valve coil 1 Remove the service cover according to the item Removing service cover see on page 420 2 Check to ensu...

Page 440: ... cover following Removing service cover see on page 420 2 Open the P plate following Opening electrical box P Mounting Plate see on page 429 Check that the LED201 red on DIP IPM is OFF when the P plate is opened 3 Disconnect the CN5A connector on the control PCB of the electrical box 4 Hold the coil of the expansion valve and pull out upward The expansion valve coil is equipped with a lock mechani...

Page 441: ...ding following the Removing service cover see on page 420 and the Removing the bottom service cover and rear cover see on page 421 2 Collect the refrigerant from the check joint following the Removing the compressor see on page 425 3 Remove the reversing valve coil following the Removing reversing valve coil see on page 429 4 Remove one 1 fixing screw and a band RAS 8HRNSE only for reversing valve...

Page 442: ...er and rear cover following the Removing service cover see on page 420 and the Removing the bottom service cover and rear cover see on page 421 2 Collect the refrigerant from the check joint following the Removing the compressor see on page 425 3 Remove the coil following the Removing reversing valve coil see on page 429 4 Remove the brazing as show in the figure below Electronic Expansion Valve M...

Page 443: ...B Pay attention not to bend or apply much force onto PCB in order to avoid PCB failure 1 Spacer 2 Middle Part of Spacer 3 PCB 1 3 5 A Enlarged View of P B Electrical Box View from Top C Spacer for PCB 1 3 5 1 1 1 1 A B 2 3 C Removing Inverter Components and Capacitor for AC Fan Motor 1 Remove the service cover following the Removing service cover see on page 420 2 Open the P mounting plate by rota...

Page 444: ...ing attach those bushes and collars 1 2 A B 3 4 5 6 7 8 9 10 No Part Quantity 1 P Mounting Plate 2 Opening Direction of P Mounting Plate 3 M5 Screw for Diode Module 2 4 M4 Screw for Radiation Fin 8 5 M4 Screw for CA 1 6 CA 7 M3 Screw for PCB2 4 8 Bush for PCB2 4 9 PCB2 10 Spacer for PCB2M4 1 11 Collar for PCB2 Transistor 4 12 Screw for IPM 4 13 Module IPM 14 Radiation Fins 15 Fin Thermistor 16 Dio...

Page 445: ... electrical box 5 Reassemble the parts in the reverse order of removing order 1 Screws for PCB2 M3 2 Screw M5 3 Fixing screws for transistor module M4 4 Led201 5 Screws for PCB M3 6 CN207 7 CN026 8 CN2 8 9 1 5 2 1 10 3 4 5 6 7 5 2 1 Removing Capacitor for AC Fan Motor CA 1 Disconnect the wirings of capacitor for AC fan motor CA 2 Remove one 1 screw for fixing the capacitor and remove the capacitor...

Page 446: ...netic contactor Removing Reactor DCL 1 Remove four 4 screws fixing the reactor and remove the reactor DCL Removing Resistors RS1 RS2 R1 R2 1 Remove one 1 screw fixing the resistor and remove each resistor Removing Reverse Phase Relay PCB PCB4 1 Remove the four 4 spacers and remove the PCB4 Removing Noise Filter NF1 1 Remove the noise filter by unhooking the top of the holder 6 portions Removing Fu...

Page 447: ...ate 10 R2 11 RS1 12 RS2 13 M4 Screw for Resistor 14 CB2 15 M4 Screw for CB2 2 16 Saddle 1 2 3 4 5 6 7 8 9 10 No Part Quantity 1 P Mounting Plate 2 Fuse Holder 3 EF1 EF2 4 M4 Screw for Fuse Holder 5 NF1 6 Holder for NF1 6 7 PCB4 8 Spacer for PCB4 4 9 Spacer for PCB4 2 10 Long nose Pliers 11 PCB4 12 Spacer A N O TE The removing method for spacer of PCB4 is as follows 1 2 3 4 5 6 7 8 9 A 10 ...

Page 448: ......

Page 449: ...hermistor 451 11 3 Electronic expansion valve 453 11 4 High pressure protection device 454 11 5 Noise filter NF 455 11 5 1 Noise filter for 3N 455 11 5 2 Noise filter for 1 456 11 6 Capacitor CB1 CB2 457 11 7 Reactor DCL 458 11 7 1 Reactor DCL for 3N 458 11 7 2 Reactor DCL for 1 458 11 8 Scroll compressor 459 11 8 1 Reliable mechanism for low vibrating and low sound 459 11 8 2 Principle of compres...

Page 450: ...S 4 12 HRNM 2 E 6 25A RAS 3 6 HVRNM 2 E 15 30A Control Method Vector control Vector control Range output frequency 20 115HZ 20 115HZ Accuracy of frequency 0 01 0 01 Controlled frequency 0 01Hz at applicable frequency range 0 01Hz at applicable frequency range Output characteristics Conditions 1 Power source voltage AC380 415V 2 Non loading free output 3 Ammeter type volt meter X1 1 Conditions 1 Po...

Page 451: ...e than 150 of the rated current Rated current x 150 Rated current x 105 1 Short circuit trip of arm 2 Instantaneous overcurrent trip 3 Instantaneous overcurrent trip 4 Electronic thermal trip Internal protection IPM Condition is maintained longer than 30 seconds or accumulated longer than 3 minutes during 10 minutes sampling time Protection of transistor module IPM has four protection function for...

Page 452: ...ruction 3 Output voltage 4 Soft start stop frequency 5 Failure signal 6 Activation of protection device 7 Overload signal 8 Charged indication A Frequency HIGH B Frequency LOW C All bit 1 D Operation E The changing speed depends on the outer setting F Output G Transmit error 30 sec H Protection activation I Activation recovery ...

Page 453: ... Level of detection When the current detected by current sensor reaches 150 of the rated current overcurrent is detected Instanta neous overcurrent When the current detected by current sensor exceeds 105 of the rated current continuously for 30 seconds or for 3 5 minutes in total during a 10 minutes period overcurrent is detected Electric thermal relay b Function When abnormalities are detected th...

Page 454: ...of stoppage cause is transmitted to PCB1 c Cancellation of protection function Transmission for signal code of stoppage cause is cancelled when a stopping order is issued or main power source is cut off Overload control 1 Level of detection When the output current exceeds 105 of the maximum output current an abnormality is detected 2 Function An overload signal is issued when output current exceed...

Page 455: ...equency 31 115Hz 20 115Hz 20 115HZ 20 115Hz Accuracy of frequency 0 01Hz at applicable frequency range Controlled frequency 0 01Hz at applicable frequency range Output characteristics Conditions 1 Power source voltage AC220 240V or AC 230V 2 Non loading free output 3 Ammeter type volt meter X1 1 Conditions 1 Power source voltage AC380 415V 2 Non loading free output 3 Ammeter type volt meter X1 1 C...

Page 456: ... 15 to 18Hz after starting except 2 2 5 3 HP 6 to 10 Hz Cause of abnormality Failure of current sensor Failure of IPM 2 2 5 3 8 10 HP or DIP IPM 4 5 6 HP Failure of compressor fan motor Disconnected wiring Overcurrent protection for inverter RAS 2 2 5 HVRN2 RAS 3HVRNS2 1 2 4 10µs 50ms 30s Time Rated Current x 150 Rated Current x 105 RAS 4 6 HVRNS2E Time Detecting current is more than 150 of the ra...

Page 457: ... has a short circuit 2 Running current reaches the maximum rated current 3 Abnormal temperature is measured by internal thermistor 4 Control voltage decreases abnormally Overload control Overload control as a current greater than rated current X105 Overload control release at a current smaller than rated current X 88 Fin temperature increase The unit is stopped when the fin temperature is higher t...

Page 458: ...ruction 3 Output voltage 4 Soft start stop frequency 5 Failure signal 6 Activation of protection device 7 Overload signal 8 Charged indication A Frequency HIGH B Frequency LOW C All bit 1 D Operation E The changing speed depends on the outer setting F Output G Transmit error 30 sec H Protection activation I Activation recovery ...

Page 459: ...of detection When the current detected by current sensor reaches 150 of the rated current overcurrent is detected Instanta neous overcurrent When the current detected by current sensor exceeds 105 of the rated current continuously for 30 seconds or for 3 5 minutes in total during a 10 minutes period overcurrent is detected Electric thermal relay b Function When abnormalities are detected the inver...

Page 460: ...of stoppage cause is transmitted to PCB1 c Cancellation of protection function Transmission for signal code of stoppage cause is cancelled when a stopping order is issued or main power source is cut off Overload control 1 Level of detection When the output current exceeds 105 of the maximum output current an abnormality is detected 2 Function An overload signal is issued when output current exceed...

Page 461: ...mpressor motor winding will be burnt out 3 When the upper part temperature of compressor increases du ring heating operation the unit is controlled according to the following method An electronic expansion valve of outdoor units is are opened to return the liquid refrigerant to the compressor through the accumulator decreasing compressor tempe rature If the compressor upper part temperature increa...

Page 462: ...sting Over 132 ºC 5 seconds continuously Thermistor for outdoor ambient temperature The thermistor resistance characteristics are shown in the figure Thermistor for evaporating temperature of outdoor unit in heating operation for defrosting The characteristics for the thermistor is the same with the value of outdoor ambient temperature thermistor as shown in the figure 90 80 70 60 50 40 30 20 10 0...

Page 463: ...RNS 2 E Type UKV 10 0 USRT series UKV 5 0USRT series for MVB Refrigerant R410A Working temperature range 30 C 65 C operation time of the coil less than 50 Mounting direction Drive shaft in vertical direction within an angle of 45 C as maximum Flow direction Reversible Drive method 4 Phase canned motor method Rated voltage DC12V 1 8 V Drive condition 83PPS pulse width at ON 36 mm sec OFF 60 mm sec ...

Page 464: ...Upper cover 3 Rear cover 4 Brazing 5 Pressure switch for control PSC 6 Discharge pipe 7 High pressure switch PSH 1 2 3 4 5 6 3 7 1 For controlling the high pressure not to increase excessively during heating operation the gas by pass circuit and the air volume of the outdoor fan is controlled automatically 2 The gas by pass circuit which is composed of the solenoid valve and the capillary tube for...

Page 465: ...the power supply side Terminals indicated with LOAD are connected to the inverter side and terminals indicated with LINE to the power supply side RAS 4 6 HRNM2E 400V 50Hz RAS 4 6 HRNS2E 400V 50Hz RAS 8 12 HRNM 380 415V 50Hz RAS 8 10 HRNSE 400V 50Hz Items Specifications Model 4LFB 16830 2FA Rated current AC415V 27 A Permissible temperature range 25 ºC to 85 ºC Circuit diagram Load Line ...

Page 466: ...e inverter to the power supply side Terminals indicated with LOAD are connected to the inverter side and terminals indicated with LINE to the power supply side RAS 4 6 HVRNM2E 230V 50Hz RAS 4 6 HVRNS2E 230V 50Hz Items Specifications Model LFB 14930 3M Rated current AC230V 30 A Permissible temperature range 25 ºC to 85 ºC Circuit diagram Load Line ...

Page 467: ...CB2 This part is used for changing the alternative current to the direct current for the inverter Connect two capacitor in line and used Items Specifications Models LNX2G472MSEAHE Capacity of static electricity 4700 μF Rated voltage 400 VDC Permissible temperature range 25 ºC to 95 ºC ...

Page 468: ...8 10 HRNSE 400V 50Hz Items Specifications Character 1 0 mH 10 at 1 kHz Rated current 30 A Direct resistance 22 8 mΩ 20 at 20 C Permissible temperature range 20 ºC to 60 ºC 11 7 2 Reactor DCL for 1 This part is used for changing the alternative current to the direct current for the inverter RAS 4 6 HVRNM2E 230V 50Hz RAS 4 6 HVRNS2E 230V 50Hz Items Specifications Character 0 59 mH 15 at 1 kHz Rated ...

Page 469: ...s is inhaled from the inlet port at the outer frame of the fixed scroll 2 The gas inside of the compression space is compressed toward the center of the scroll 3 The compression space is minimum at the center of the scroll and the gas compressed at the maximum is discharged from the outlet port of at the center of the scroll 4 The above procedures suction compression discharge is repeated continuo...

Page 470: ......

Page 471: ... Not cooling well due to insufficient installation space for the outdoor unit 467 12 7 Caution with the refrigerant leakage 468 12 7 1 Maximum permissible concentration of the HCFC gas 468 12 7 2 Calculation of the refrigerant concentration 468 12 7 3 Countermeasure for the refrigerant leakage according to the KHK standard 468 12 8 Maintenance work 469 12 9 Service and maintenance record 470 12 10...

Page 472: ...dary power source on the transformer correct Disconnect the secondary side of the transformer and check the voltage by means of a tester Indoor unit transformer Secondary side Primary side 220 230 or 240 V Circuit and voltage 12 V 12 V 3 Is the wiring loosened or inco rrectly connected Check the wiring connection on the PCB Thermistor connectors Connector of the remote control cable Connector of t...

Page 473: ...insufficient refrigerant charge resulted in the overheating of the discharge gas and the oil deterioration which was finally due to the separated operation despite the alarm code 08 Countermeasure 1 The compressor was replaced with a new compressor 2 The correct refrigerant amount was charged according to the refrigerant piping length and the connected indoor units Remarks Additional refrigerant c...

Page 474: ...farthest position Cause If the location of an outdoor unit is 20 meters lower than the location of the indoor units resetting of the DIP switch DSW3 is required However no setting was performed Therefore the largest discharge pressure was not increased This resulted in an in sufficient cooling performance for the indoor unit Outdoor unit Indoor units Insufficient cooling Countermeasure The setting...

Page 475: ...h Cause The indoor units were installed without the ducts Since there scarcely was any external static pressure an abnormally big air volume was supplied This resulted in a higher air speed through the heat exchanger Damper Indoor unit A Filter Countermeasure In order to reduce the airflow rate a plate that is used as a damper at the discharge gas side was added Remarks Note that the running curre...

Page 476: ...n of the indoor units and the outdoor unit was the following ON OFF ON ON ON ON Power Source This system was used in a tenant building One of tenant s customers turned off the main switch for the indoor unit while other indoor units are running This results in a different setting of the total indoor unit capacity in the same refrigerant cycle Countermeasure All the main switches for the indoor uni...

Page 477: ...em from excessively high suction pressure was activated the frequency of the compressor was decreased and the cooling capacity was also decreased accordingly As the outdoor units in line were installed back to back with a distance of 600 mm between each outdoor unit s back the hot discharged air from other outdoor units was circulated Countermeasure Ensure that sufficient space should be secured f...

Page 478: ...ms 2 Calculate the room volume V m of each room 3 Calculate the refrigerant concentration C kg m of the room according to the following equation C R V R Total quantity of charged refrigerant kg V Room volume m C Refrigerant concentration 0 44 kg m3 for the R410A Use this value only for reference because this value is not fixed yet 12 7 3 Countermeasure for the refrigerant leakage according to the ...

Page 479: ...rial Check for any peeled thermal insulator on the cabinet Repair the thermal insulator 5 Electrical equipment Activation Check for an abnormal activation of the magnetic contactor the auxiliary relay the PCB and others Line condition Pay attention to the working voltage the working amperage and the working phase balance Check for any faulty contact that is caused by the loosened terminal connecti...

Page 480: ...ood Not Good 16 Check for a leakage in the 4 way valve ditto Good Not Good 17 Check for a leakage in the check valve ditto Good No Good 18 Check for a leakage in the accumulator ditto Good Not Good 19 Check for a leakage in the strainer ditto Good Not Good 20 Check for a leakage in the electronic expansion valve ditto Good Not Good 21 Check for a leakage in the piping ditto Good Not Good 22 Check ...

Page 481: ...intenace notes 471 SMGB0064 rev 0 08 2011 12 No Check item Action Judgement 37 Instructions to the client about the cleaning method Done Not yet 38 Instructions to the client about the operation Done Not yet ...

Page 482: ...U expansion valve opening Eo 4 9 Temp at the top of compressor Td 4 10 Evaporating temp at heating TE 4 11 Ambient air temp To 4 12 Cause of stoppage at inverter iT 4 13 Inverter secondary current A2 4 14 O U address nA 5 Indoor unit unit No 1 5 1 I U expansion valve opening EA 5 2 Liquid pipe temp of I U Free ze protection LA 5 3 I U intake air temp iA 5 4 I U discharge air temp oA 5 5 Cause of I...

Page 483: ...rial No RAS Serial No RAS Serial No 8 3 I U intake air temp iA 8 4 I U discharge air temp oA 8 5 Cause of I U stoppage dA N O TE O U Outdoor Unit I U Indoor unit FAN1 FAN2 Constant speed fan 52C CMC PSH High pressure switch 20A Solenoid valve SVA 20F Solenoid valve SFV 21 Reversing valve RVR CH Oil heater Multiply 1 8 by the code on the 7 segment ...

Page 484: ...Comp top temp bA 98 Thermo temp of remote control switch bb C Micro computer state indication I U micro computer C1 O U micro computer C2 D Stopping cause state indication Stopping cause state indication d1 E Alarm occurrence Times of abnormality E1 Times of power failure E2 Times of abnormal transmitting E3 Times of inverter tripping E4 F Automatic louver state Louver sensor state F1 H Pressure f...

Page 485: ...12 Maintenace notes 475 SMGB0064 rev 0 08 2011 12 O U ex valve 1 L2 9E O U ex valve 2 L3 O U ex valve B L4 P Running current indication reference Comp current P1 9F ...

Page 486: ...he check valve may cause an incorrect brazing due to the gas pressure at the brazing of the discharge piping If the compressor replacing mode is performed again set the DSW4 4 to OFF and keep the DSW4 4 at the OFF side during ten minutes Then start according to the procedure No 6 10 Collect the refrigerant by means of the refrigerant collection Perform either A or B depending on the process 10 The...

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Page 488: ...ance with the standard ISO 14001 of AENOR Spain for its Environmental Management systems accordance with the standard Hitachi certifies that our products have met EU consumer safety health and environmental requirements Hitachi Air Conditioning Products Europe S A Ronda Shimizu 1 Polig Ind Can Torrella 08233 Vacarisses Barcelona Spain HITACHI participates in the Eurovent Certification Programme th...

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