Hitachi FSXN Series Service Manual Download Page 362

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Instructions for the customer for cleaning
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Instructions for the customer for the
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Instructions for the customer for operation

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12 Maintenance notes

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SMGB0065 rev. 1 - 12/2010

Summary of Contents for FSXN Series

Page 1: ...S 10FSXN RAS 12FSXN RAS 14FSXN RAS 16FSXN RAS 18FSXN RAS 20FSXN RAS 22FSXN RAS 24FSXN RAS 26FSXN RAS 28FSXN RAS 30FSXN RAS 32FSXN RAS 34FSXN RAS 36FSXN RAS 38FSXN RAS 40FSXN RAS 42FSXN RAS 44FSXN RAS 46FSXN RAS 48FSXN RAS 50FSXN RAS 52FSXN RAS 54FSXN ...

Page 2: ... information 1 Unit installation 2 Piping work and refrigerant charge 3 Electrical wiring 4 Control system 5 Optional functions 6 Test run 7 Troubleshooting 8 Spare parts 9 Servicing 10 Electrical checks of the main parts 11 Maintenance notes 12 ...

Page 3: ...on 22 3 Piping work and refrigerant charge 29 3 1 Outdoor unit 30 3 1 1 Refrigerant pipe selection 30 3 1 2 Copper pipes sizes connection and insulation 30 3 1 3 Pipe connection kit 36 3 1 4 Precautions for the installation of the outdoor unit 38 3 1 5 General instructions on the installation of refrigerant pipes 39 3 1 6 Refrigerant pipe connection for heat pump systems 2 pipes 41 3 1 7 Refrigera...

Page 4: ...high discharge air temperature prevention control only for RCI RCD and RPI 6 HP 105 5 2 10 Protection control 106 5 2 11 Control of CH unit CH 6 0 10 0 N1 109 5 3 Control and safety devices 111 5 3 1 Outdoor unit 111 5 3 2 CH unit 111 6 Optional functions 113 6 1 Setting method 114 6 2 External input and output setting 115 6 2 1 External input function setting 116 6 2 2 External output function se...

Page 5: ...by using the remote control switch 238 8 5 Troubleshooting by using the 7 segment display 245 8 6 RSW DSWs and LEDs functions 257 8 7 Checking procedures for each main part 262 8 7 1 Self checking of PCB using the remote control 262 8 7 2 Self checking of the remote control switch 265 8 7 3 Checking procedures for other main parts 267 9 Spare parts 275 9 1 Cabinet and fan components for outdoor un...

Page 6: ...switch PSH1 PSH2 319 10 13 2 Removing the high pressure sensor Pd and low pressure sensor Ps 319 10 14 Removing the liquid pipe thermistor 320 10 15 Removing the ambient temperature thermistor 322 10 16 Removing other electrical components 323 10 16 1 Removing the PCB1 and electrical components for the electrical box 323 10 16 2 Removing the PCB2 for the inverter 325 10 16 3 Removing the diode mod...

Page 7: ...349 12 3 Alarm code 31 350 12 4 Not cooling well due to insufficient installation space for the outdoor unit 351 12 5 Precautions in the event of refrigerant leaks 352 12 5 1 Maximum permissible concentration of hydrofluorocarbon HFC 352 12 5 2 Calculation of the refrigerant concentration 352 12 5 3 Countermeasures in the event of refrigerant leaks 352 12 6 Maintenance work 354 12 7 Service and ma...

Page 8: ...2 Introduction 2 1 1 3 Environment friendly units 2 1 2 Safety 3 1 2 1 Symbols used 3 1 3 Product guide 4 1 3 1 Classification of outdoor unit models and CH units 4 1 3 2 Product guide Outdoor units 4 1 3 3 Accessory code list 6 1 General information 1 SMGB0065 rev 1 12 2010 1 ...

Page 9: ... specific models No claims will be accepted based on the data illustrations and descriptions included in this manual No type of modification must be made to the equipment without prior written authorisation from the manufacturer 1 1 2 Introduction HITACHI presents the FSXN series which belongs to the SET FREE series characterised by its modular design The application of a single unit called a base...

Page 10: ...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 CAUTION The text following this symbol contains information and instructions relating directly to your safety and physical wellbeing No...

Page 11: ...acity of connectable indoor units HP 6 0 6 0 HP 10 0 6 1 to 10 0 HP N R410A refrigerant 1 Generation XX XX N 1 1 3 2 Product guide Outdoor units RAS outdoor units RAS FSXN outdoor units RAS FSXN 3 Unit Code Unit Code RAS 8FSXN 60288346 RAS 14FSXN 60288349 RAS 10FSXN 60288347 RAS 16FSXN 60288350 RAS 12FSXN 60288348 RAS 18FSXN 60288351 NOTE To obtain the different working range powers please refer t...

Page 12: ... 12FSXN RAS 14FSXN RAS 14FSXN RAS 12FSXN RAS 14FSXN RAS 14FSXN RAS 14FSXN RAS 14FSXN RAS 16FSXN HP 32 34 36 38 40 42 Model RAS 32FSXN RAS 34FSXN RAS 36FSXN RAS 38FSXN RAS 40FSXN RAS 42FSXN Combination RAS 16FSXN RAS 16FSXN RAS 18FSXN RAS 12FSXN RAS 12FSXN RAS 12FSXN RAS 16FSXN RAS 18FSXN RAS 18FSXN RAS 12FSXN RAS 12FSXN RAS 12FSXN RAS 14FSXN RAS 16FSXN RAS 18FSXN HP 44 46 48 50 52 54 Model RAS 44F...

Page 13: ...e pipe connection kit 70526110 MC 30XN Branch pipe pipe connection kit 70526111 CH 6 0N1 CH Unit 60291633 CH 10 0N1 CH Unit 60291634 DBS TP10A Drain Boss 60291683 E 102SN2 Branch pipe multikit 70524001 E 162SN2 Branch pipe multikit 70524002 E 242SN2 Branch pipe multikit 70524004 E 302SN2 Branch pipe multikit 70524005 E 52XN2 Branch pipe multikit 70525000 E 102XN2 Branch pipe multikit 70525001 E 16...

Page 14: ...port lifting and handling of the units 8 2 1 3 Installation space RAS 8 18 FSXN 10 2 1 4 Center of gravity 11 2 1 5 Installation 11 2 1 6 Foundation and anchorage of outdoor unit 20 2 2 CH units 22 2 2 1 Transportation and handling CH units 22 2 2 2 CH unit installation 22 2 Unit installation 7 SMGB0065 rev 1 12 2010 2 ...

Page 15: ...tion of the unit CAUTION In areas with high electromagnetic turbulence a fuse may blow or the unit stop or an alarm may be triggered In this case stop the system and restart it to remove the alarm Make sure that the base of the foundations is flat and strong enough to bear the weight of the unit Install the outdoor unit in an area with enough space around the unit to permit service and maintenance...

Page 16: ...nit DANGER Always use textile slings in good condition without cuts or wear and with the correct capacity for lifting the outdoor unit Do not fit the slings on the wooden base C of the unit The wooden base is only designed to protect the base of the unit during transportation it will not withstand the strain of lifting the unit Do not use metal cables to lift the unit Metal cables may slip on the ...

Page 17: ... than 1500 mm a space of 500 h2 2 mm is required at the front A If the rear wall is higher than 500 mm a space of 300 h1 2 mm is required at the back B If a wall D is installed in front of the unit a ventilation hole C should be made in the wall When the space over the unit is less than 1500 mm or the space around the unit is closed a duct is required to prevent short circuits between the inlet ai...

Page 18: ...540 305 590 2 1 5 Installation Installation with walls in two directions If the units installed are adjacent to high buildings without walls in two directions a space of 300 mm is required at the rear side of the unit 300 10 400 500 h2 2 300 200 300 400 W W W W W NOTE All measurements are in mm Top view The arrow indicates the front of the unit W No limit for side wall height 2 Unit installation 1...

Page 19: ... W 300 h1 2 10 500 20 20 500 h2 2 W Rear to rear installation 1 Rear to rear installation 2 500 h2 2 900 500 h2 2 20 20 10 W 200 500 h2 2 500 400 400 500 h2 2 W NOTE All measurements are in mm Top view The arrow indicates the front of the unit W No limit for side wall height 2 Unit installation 12 SMGB0065 rev 1 12 2010 ...

Page 20: ...he following figures include the space necessary for typical installation and maintenance work for operation in refrigeration mode at an outdoor temperature of 35 C If the outdoor temperature is higher and if there is the possibility of short circuit between the inlet and outlet air locate the most suitable dimensions by calculating the air flow current in comparison with the dimensions given For ...

Page 21: ...wind protector C At locations where snow is frequent place hoods field supplied on the air inlet and outlet areas B and C preventing the wind A from directly affecting the air outlet Also a higher base foundation should be installed in order to prevent the accumulation of snow D Install the unit at a sunny location 2 Unit installation 14 SMGB0065 rev 1 12 2010 ...

Page 22: ...ods Paint the hoods in accordance with Munsell code 1 0Y 8 5 0 5 beige color Use self tapping screws M5 for fixing the hoods Reinforce the hoods with brackets if necessary All measurements are in mm RAS 8 12 FSXN P 6 7 No Name 1 Air discharge hood 2 Rear suction hood 3 Left suction hood 4 Right suction hood 5 Safety cable to prevent overturning 6 Air flow direction front side 7 Air flow direction ...

Page 23: ... 1 Air discharge hood 2 Rear suction hood 3 Left suction hood 4 Right suction hood 5 Safety cable to prevent overturning 6 Air flow direction front side 7 Air flow direction rear side 2 Unit installation 16 SMGB0065 rev 1 12 2010 ...

Page 24: ... 4 places Drill a pilot hole into the punch mark and mount the fixing plate Enlarge view of B 1 1 1 1 1 2 fixing screw Enlarge view of C 1 1 2 fixing screw Air discharge hood for RAS 8 12 FSXN Ø Ø A D C D C 935 150 464 14 934 2 Unit installation 17 SMGB0065 rev 1 12 2010 2 ...

Page 25: ...hood 1 Right plate 1 1 2 Left plate 1 1 3 Front panel 1 1 4 Front panel 2 1 5 Front panel 3 1 6 Front panel upper 1 7 Front panel lower 1 8 Side plate 1 9 Left fixing plate for front 1 10 Right fixing plate for front 1 11 Left fixing plate for rear 1 12 Right fixing plate for rear 1 Air discharge hood for RAS 14 18 FSXN 1195 150 464 Ø Ø A D C D C 14 1194 2 Unit installation 18 SMGB0065 rev 1 12 20...

Page 26: ...uction rear hood 1 Right plate 1 1 2 Left plate 1 1 3 Front panel 1 1 4 Front panel 2 1 5 Front panel 3 1 6 Front panel upper 1 7 Front panel lower 1 8 Side plate 1 9 Left fixing plate for front 1 10 Right fixing plate for front 1 11 Left fixing plate for rear 1 12 Right fixing plate for rear 1 Left suction hood for RAS 8 18 FSXN Α Β 605 C C 2 Unit installation 19 SMGB0065 rev 1 12 2010 2 ...

Page 27: ...pth C Anti vibration insulation material D Refrigerant pipes The foundations for the installation of the outdoor unit must be more than 150 mm above ground level The foundations require perimeter drainage to help drain condensation When a system of condensation drainage pipes is required for the outdoor unit the genuine accessory DBS TP10A should be used Do not fit drainage pipes or collection tra...

Page 28: ...Does not produce strange noises Remains secure in the event of strong winds or earthquakes Position of anchorage bolts NOTE All measurements are in mm Secure the outdoor unit using the field supplied anchorage bolts A Openings for the anchorage bolts 4x 38 x 15 1 Outdoor unit SET FREE RAS 8 12 FSXN 2 Outdoor unit SET FREE RAS 14 18 FSXN Diagram of fastening of outdoor unit using field supplied anc...

Page 29: ... unit The combination of the CH unit and indoor unit is as follows Model Indoor unit quantity Total indor capacity HP CH 6 0N1 1 to 7 Less than 6 0 CH 10 0N1 1 to 8 6 0 10 0 NOTE The excess of the total capacity may cause insufficient performance and abnormal sound Be sure to connect within the allowable total capacity In case that the indoor unit total capacity is 10 0 HP for CH 10 0N1 the perfor...

Page 30: ...material ID16 2 ID38 3 ID20 1 ID22 2 ID43 3 Clamp 6 6 ID Inner diameter Initial check Install de CH unit with a proper clearance around it for maintenance working space as shown in the figure Model A B CH 6 0N1 300 70 CH 10 0N1 400 70 C Electrical box D Service space 300 x 300 E Service access door 450 x 540 F 2 suspension bolt M10 or W3 8 field supplied G Upper side H Bottom side NOTE All measure...

Page 31: ...ectly radiated to the electrical box or intermediate wiring Operating line 2 Install the CH unit and components as far as practical or at least 3 meters from the electromagnetic wave radiator 3 Install a noise filter when the power supply emits harmful noises The installation place should be convenient for the refrigerant piping or electrical wiring connection Do not install the CH unit in the pla...

Page 32: ... M10 5 Concrete For concrete slab Hole in anchor 1 Part A 2 Part B 3 Unit body 4 Use a holesaw to make a hole 5 Inserting 6 Break a head portion of anchor by using a hummer 7 Fixing 8 Fixing bolt Resin capsule Use the resin capsule within a warranty period It affects for 6 months from the manufacturing date 1 Stiffening agent 2 Glass 3 Stone 4 Epoxy resin 5 Resin capsule 6 Use a holesaw to make a ...

Page 33: ...Required time is as shown in the following table Ambient temp C Time 20 Min 30 minutes 15 Min 1 hour 10 Min 2 hours 5 Min 4 hours 0 Min 8 hours 2 Unit installation 26 SMGB0065 rev 1 12 2010 ...

Page 34: ...x After moving the electrical box the wiring should be put into the edge saddle and bounded with the wire clip Refer to enlarged view of A below 5 Mount the electrical box 6 Rotate the service cover for the electronic expansion valve 180 degrees and mount it 7 Mount the service cover for the electrical box D B C 2 2 4 3 3 1 1 6 6 A 6 5 7 5 7 A See below the enlarged view B Service cover for electr...

Page 35: ...s Suspension Bolt 2 M10 or W3 8 Nut 6 M10 or W3 8 Washer 4 M10 or W3 8 2 Hanging the CH unit To hang the CH unit hold it from the bottom of the casing Insert the suspension bolt into the groove part of the suspension bracket as shown in the figure below Ensure that the washers are correctly fixed to the suspension bracket After hanging the unit the piping and wiring connection should be done insid...

Page 36: ...llation of refrigerant pipes 39 3 1 6 Refrigerant pipe connection for heat pump systems 2 pipes 41 3 1 7 Refrigerant pipe connection for heat recovery systems 3 pipes 49 3 1 8 Refrigerant charge 58 3 1 9 Precautions in the event of refrigerant leaks 63 3 1 10 Drainage pipes 64 3 2 CH unit 66 3 2 1 Considerations 66 3 2 2 Piping materials 66 3 2 3 Cautions for piping connection work 66 3 2 4 Refrig...

Page 37: ...ant pipes depends directly on the power of the outdoor unit If larger diameter refrigerant pipes are used the circuit lubrication oil tends to separate from the gas carrying it The compressor will be seriously damaged due to a lack of lubrication If smaller diameter refrigerant pipes are used the gas or liquid refrigerant will have serious difficulties in circulating System performance will be aff...

Page 38: ...e is no dust or dampness on the inside Before you install the pipes clean the inside with oxygen free nitrogen gas to eliminate any remains of dust or other substances CAUTION Do not use hand saws circular saws abrasive grinders or other tools that generate shavings Strictly follow national or local regulations regarding occupational health and safety Wear appropriate means of protection during cu...

Page 39: ...ø28 6 ø28 6 ø31 75 ø12 7 ø12 7 ø15 88 RAS 18FSXN ø28 6 ø28 6 ø31 75 ø15 88 ø15 88 ø19 05 RAS 20FSXN RAS 22FSXN RAS 24FSXN RAS 26FSXN ø31 75 ø31 75 ø34 9 ø19 05 ø19 05 ø22 2 RAS 28FSXN RAS 30FSXN RAS 32FSXN RAS 34FSXN RAS 36FSXN ø38 1 ø38 1 ø41 3 ø19 05 ø19 05 ø22 2 RAS 38FSXN RAS 40FSXN RAS 42FSXN RAS 44FSXN RAS 46FSXN RAS 48FSXN RAS 50FSXN RAS 52FSXN RAS 54FSXN 3 Piping work and refrigerant charg...

Page 40: ...Keep the ends of the pipes covered while other installation work is being carried out to avoid the entry of dampness or dirt Do not place the pipes directly on the ground without appropriate protection or adhesive vinyl tape to cover the ends Where the pipe installation is not completed for a certain amount of time braze the ends of the pipe to seal Then fill it with oxygen free nitrogen gas throu...

Page 41: ... a connection with flare fitting Minimum thickness of the connection Diameters mm R410A ø6 35 0 5 ø9 53 0 6 ø12 7 0 7 ø15 88 0 8 ø19 05 0 8 ø22 2 0 9 ø25 4 0 95 ø28 6 1 0 ø31 75 1 1 ø38 1 1 35 ø43 3 1 45 ø44 5 1 55 Distance between sides B of the nut A Diameters mm B ø6 35 17 ø9 53 22 ø12 7 26 ø15 88 29 ø19 05 36 Connection of pipes from the installation to the outdoor unit 1 Gas connection low pr...

Page 42: ...high pressure G Gas pipe low pressure only for heat recovery systems with CH units H Cover of refrigerant gas and liquid pipes I Cover insulation Accessories factory supplied with the unit Accessory Application RAS 8FSXN RAS 10FSXN RAS 12FSXN RAS 14FSXN RAS 16FSXN RAS 18FSXN Accessory for pipes connection for refrigerant pipe high pressure 1 ø22 2 ø15 88 ø22 2 ø19 05 ø25 4 ø22 2 ø25 4 ø22 2 ø25 4 ...

Page 43: ...1 Ø38 1 ID28 6 ID31 75 Ø31 75 Ø31 75 ID31 75 ID25 4 ID34 9 OD31 75 ID31 75 ID28 6 ID25 4 ID28 6 ID25 4 OD31 75 OD38 1 ID41 3 ID15 88 ID19 05 Ø25 4 ID9 53 ID12 7 ID15 88 Ø19 05 Ø19 05 ID19 05 B A ID12 7 ID15 88 OD19 05 ID9 53 MC 30AN Connection kit 1 Gas line Gas line reducer Liquid line Liquid line reducer B A D ID31 75 ID38 1 Ø38 1 ID28 6 ID31 75 Ø31 75 Ø31 75 ID31 75 ID25 4 OD31 75 ID31 75 ID28 ...

Page 44: ...19 05 OD25 4 ID19 05 ID15 88 ID22 2 ID15 88 ID19 05 Ø25 4 ID9 53 ID12 7 ID15 88 Ø19 05 Ø19 05 ID19 05 B A ID12 7 ID15 88 OD19 05 ID9 53 MC 30XN Connection kit 1 Gas line low pressure Gas line high pressure Gas line reducer low pressure Gas line reducer high pressure Liquid line Liquid line reducer B A D ID31 75 ID38 1 Ø38 1 ID28 6 ID31 75 Ø31 75 Ø31 75 ID31 75 ID25 4 B A D ID31 75 ID38 1 Ø38 1 ID2...

Page 45: ... kit at a lower level with respect to the connection of the refrigerant pipes of the outdoor unit A 200 300 A 200 A 200 300 300 If the connection kit is placed above the refrigerant pipe connection of the outdoor unit keep a maximum of 300 mm between the connection kit and the base of the outdoor unit In addition an oil recovery unit A minimum 200 mm should be fitted between the connection kit and...

Page 46: ...unit The pipe diameter allocated must be respected in line with the instructions given in Chapter Pipe size selection see on page 30 The units must be located and the gas pipes laid particularly when the outdoor unit is at a different height to the indoor unit in line with the instructions given in chapter Precautions for the installation of the outdoor unit see on page 38 System performance depen...

Page 47: ...ally cold irradiation is the temperature gain experienced by the gas as when it circulates under pressure and at such low temperatures along the inside of the pipes it is actually liquid and obtains the outdoor temperature boiling at a very low temperature to turn into gas As a result of the temperature gain although it is actually perceived as cold emission it loses its capacity to cool and the s...

Page 48: ...r refrigeration pipes or clamps to suspend the pipes as shown in the diagram 3 1 6 Refrigerant pipe connection for heat pump systems 2 pipes Pipe sizes for RAS 8 18 FSXN Base unit a All measurements are in mm Model RAS 8 FSXN RAS 10 FSXN RAS 12 FSXN RAS 14 FSXN RAS 16 FSXN RAS 18 FSXN a Gas ø19 05 ø22 2 ø25 4 ø25 4 ø28 6 ø28 6 Liquid ø9 53 ø9 53 ø12 7 ø12 7 ø12 7 ø15 88 If the main refrigerant pip...

Page 49: ...5 4 ø28 6 ø28 6 ø28 6 ø28 6 Liquid ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø15 88 ø15 88 c Gas ø19 05 ø19 05 ø22 2 ø25 4 ø25 4 ø25 4 ø28 6 ø28 6 ø28 6 Liquid ø9 53 ø9 53 ø9 53 ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø15 88 If the main refrigerant pipe specified in the table is not available at the installation location select the size given in brackets In this case prepare a suitable reducer Main pipe Alt...

Page 50: ...igerant pipe specified in the table is not available at the installation location select the size given in brackets In this case prepare a suitable reducer Main pipe Alternative pipe and reducer Main pipe Alternative pipe and reducer ø9 53 ø9 53 ø12 7 ø25 4 ø25 4 ø28 6 ø12 7 ø12 7 ø15 88 ø28 6 ø28 6 ø31 75 ø15 88 ø15 88 ø19 05 ø31 75 ø31 75 ø34 9 ø19 05 ø19 05 ø22 2 ø38 1 ø38 1 ø41 3 ø22 2 ø22 2 ø...

Page 51: ... 9 14 Nm Liquid 14 18 Nm E Refrigerant gas liquid pipe F O ring P Refrigerant gas liquid pressure CAUTION Do not force the valve open buffer this could damage the seat of the valve A spare valve seat is not supplied When performing the start up test open valve to the full Otherwise the system may be damaged Refrigerant pipe connection RAS 8FSXN A B C E D F RAS 10FSXN A C F G E B RAS 12FSXN A H H C...

Page 52: ...s using copper pipes specifically for use with refrigerant When laying the pipes make sure that they do not directly rest on or touch walls or other parts of the building when the refrigerant is flowing through the pipes this could cause strange noises Specific torques for the flared connections Flared connection mounting see on page 40 While welding apply a flow of nitrogen gas inside the pipe Fu...

Page 53: ...nit B C secondary outdoor units D connection kit 1 E connection kit 2 F indoor units Size of pipes 1 Pipe diameter for the outdoor unit 2 Diameter of the main pipe from the base unit or connection kit 1 to the first branch 2 HP outdoor unit Equivalent pipe length 100 m HP outdoor unit Equivalent pipe length 100 m Gas Liquid Gas Liquid 8 ø19 05 ø9 53 18 24 ø28 6 ø15 88 10 ø22 2 ø9 53 26 34 ø31 75 ø...

Page 54: ...the reducer field supplied 3 Where the refrigerant pipe length is greater than 100 m the pipe diameter does not have to be increased after the first branch Where the size of the multikit is greater than that of the first branch adjust the size of the multikit to the first branch Where the diameter of the pipe selected after the first branch is greater than the diameter of the pipe after it use the...

Page 55: ...c 30 m or d e f 30 m Up to 2 From 41 m to 90 m Up to 1 Figure 1 40 Figure 2 Not available NOTE 1 Main pipe branch distribution from one 1 multikit to two 2 multikits d e f a b c B A B B B A main branch B indoor units Figure 1 two branches on the main pipe Figure 2 capacity ratio of the indoor units 40 A B 41 90 m 41 90 m A 20 80 A main branch B secondary branch A main branch Figure 3 distributor u...

Page 56: ... a suitable reducer Main pipe Alternative pipe and reducer Main pipe Alternative pipe and reducer ø9 53 ø9 53 ø12 7 ø22 2 ø22 2 ø25 4 ø12 7 ø12 7 ø15 88 ø25 4 ø25 4 ø28 6 ø15 88 ø15 88 ø19 05 ø28 6 ø28 6 ø31 75 ø19 05 ø19 05 ø22 2 Pipe sizes for RAS 20 36 FSXN Combination of two units A B C a b c C a b c 1 B A 2 A main outdoor unit B secondary outdoor unit C connection kit 1 indoor units on left s...

Page 57: ... 6 Gas high pressure ø15 88 ø15 88 ø19 05 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 Liquid ø9 53 ø9 53 ø9 53 ø12 7 ø12 7 ø12 7 ø12 7 ø12 7 ø15 88 If the main refrigerant pipe specified in the table is not available at the installation location select the size given in brackets In this case prepare a suitable reducer Main pipe Alternative pipe and reducer Main pipe Alternative pipe and reducer ø9 53 ø9 5...

Page 58: ...19 05 ø19 05 ø19 05 c Gas low pressure ø25 4 ø28 6 ø28 6 ø28 6 ø28 6 ø28 6 ø28 6 ø28 6 ø28 6 Gas high pressure ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 Liquid ø12 7 ø12 7 ø15 88 ø15 88 ø15 88 ø15 88 ø15 88 ø15 88 ø15 88 d Gas low pressure ø25 4 ø25 4 ø25 4 ø25 4 ø28 6 ø28 6 ø28 6 ø28 6 ø28 6 Gas high pressure ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 ø22 2 Liquid ø12 7 ø12 7 ø12...

Page 59: ... be taken to ensure that the flame from the blow torch does not fall on the body of the stop valve A and J on the compressor N and cover or on the insulation bushings by inserting a metal plate L in front of the oil return pipe M Details of the gas and liquid stop valves 1 Gas valve 2 Liquid valve A Plug Tightening torque Gas 50 58 Nm Liquid 30 42 Nm B Hexagonal wrench To open or close the valve C...

Page 60: ... before removing the stop pipe Otherwise the pipe may explode when heated with the blow torch Special care should be taken to ensure that the flame from the blow torch does not fall on the body of the stop valve on the compressor and cover or on the insulation bushings insert a metal plate in front of the oil return pipe Gas stop valve see on page 43 Connect the indoor units to the outdoor units u...

Page 61: ...t low pressure 2 E1 Gas connection kit high pressure 1 E2 Gas connection kit high pressure 2 F1 Liquid connection kit 1 F2 Liquid connection kit 2 G Accessory for connection of pipes L shaped H Outdoor unit 3 I Outdoor unit 2 J Outdoor unit 1 K Accessory for connection of pipes Z shaped N Accessory for connection of pipes Size of pipes ø mm and selection of multikit 3 pipes a H4 b L3 CH L4 c H3 L5...

Page 62: ... 99 ø25 4 ø22 2 ø12 7 36 ø38 1 ø31 75 ø19 05 16 17 99 ø28 6 ø22 2 ø12 7 4 Pipe diameter between the CH unit and the multikit 3 pipes and 2 pipes 9 CH unit Maximum combination of indoor units 8 Capacity of indoor units 3 pipes 2 pipes Gas low pressure Gas high pressure Gas Liquid CH 6 0N1 7 0 8 1 5 ø15 88 ø12 7 ø12 7 15 ø9 53 1 6 4 0 ø15 88 ø12 7 ø15 88 ø9 53 4 1 6 0 ø19 05 ø15 88 ø15 88 ø9 53 CH 1...

Page 63: ...ield supplied 3 Where the refrigerant pipe length is greater than 100 m the pipe diameter does not have to be increased after the first branch Where the size of the multikit is greater than that of the first branch adjust the size of the multikit to the first branch Where the diameter of the pipe selected after the first branch is greater than the diameter of the pipe after it use the same diamete...

Page 64: ...the CH unit according to the instructions given in this manual 4 Where the length of pipe L3 between each multikit and each indoor unit is considerably longer than on another indoor unit the refrigerant will not flow correctly and performance is lower in comparison with other models recommended pipe length up to 15 m Pipe branching restrictions Follow the instructions given in the table below for ...

Page 65: ...ranch B distributor A branch B distributor 3 1 8 Refrigerant charge Installation airtight test Check that the stop valves are fully closed to do so remove the covers and check that the valves are closed to the corresponding torque Heat pump system Details of the gas and liquid stop valves see on page 44 Heat recovery system Details of the gas and liquid stop valves see on page 52 Check that the ou...

Page 66: ... with R410A refrigerant gas should be used Do not open the stop valves on the outdoor unit DANGER Only use nitrogen gas when testing for leaks Never use oxygen acetylene or fluorocarbon gas these could result in an intoxication or explosion Apply a maximum pressure of 4 15 MPa of nitrogen gas to the installation Check there are no refrigerant leaks in the welds and the flared connections of all th...

Page 67: ...he units Maximum additional refrigerant charge The total additional charge must not exceed the maximum additional refrigerant charge indicated in the following table Outdoor unit Maximum additional refrigerant charge kg Outdoor unit Maximum additional refrigerant charge kg RAS 8 10 FSXN 28 RAS 18 24 FSXN 51 RAS 12FSXN 36 RAS 26 54 FSXN 63 RAS 14 16 FSXN 40 Method of calculation of the total additi...

Page 68: ... page 52 Charge the total additional refrigerant as calculated in chapter Method of calculation of the total additional refrigerant charge see on page 60 If it is not possible to charge the total quantity of additional refrigerant proceed as follows Fully open the gas stop valve in the case of the outdoor units of heat recovery systems open the high and low pressure gas valves Start the system run...

Page 69: ...ur on PCB1 to OFF and carry out the test run Excessive charge The refrigerant charge is excessive Calculate the refrigerant charge according to the length of the refrigerant pipes Collect the charged refrigerant appropriately and charge the unit with correct amount of refrigerant Insufficient charge The refrigerant charge is insufficient Check whether the unit has been charged with additional refr...

Page 70: ...nal legislation and local codes regarding safety requirements in the event of refrigerant leaks Maximum permitted concentration of hydrofluorcarbon HFC The R410A refrigerant gas used in the equipment is fireproof and not toxic DANGER In the event of a leak the gas will spread around the room displacing the air and could therefore result in asphyxia The maximum permitted concentration of HFC R410A ...

Page 71: ...with rain water requires draining Select a location for the unit which permits adequate drainage If necessary mount an installation suitable for the drainage of condensation DANGER Drainage must not take place in areas frequented by pedestrians In low temperatures the drainage water could freeze and lead to falls If it is necessary to install the outdoor unit in an area frequented by pedestrians a...

Page 72: ... A Drain pipe B Optional drain plug C Drain pipes field supplied D Base of unit Drain kit components Model Description Material colour Quantity Application DBS TP10A Drain pipe PP black 2 Drain pipe connection Drain plug PP black 2 Drain pipe plug Rubber plug CR black 4 Pipe and plug seal 3 Piping work and refrigerant charge 65 SMGB0065 rev 1 12 2010 3 ...

Page 73: ... for piping connection work A Connect the indoor outdoor connecting pipes Fix the pipes and pay attention not to contact with weak materials such as ceiling Otherwise abnormal sound may be heard due to the vibration of the piping B Apply refrigerant oil slightly on the sheet surface of the pipe and flare nut before the flaring work And then tighten the flare nut with the specified tightening torqu...

Page 74: ... 20 3 4 2 Unit mm 1 Service cover for electronic expansion valve 2 Low pressure pas pipe ponnection ø flare nut 3 Service cover for electrical box 4 High pressure gas pipe connection ø flare nut 5 Electrical box available for both sides 6 Gas pipe connection ø flare nut 7 Outdoor unit connecting side 8 Indoor unit connecting side Model Dimension A B C CH 6 0N1 ø15 88 82 89 CH 10 0N1 ø19 05 89 96 S...

Page 75: ... CH unit and also the connected indoor unit capacity is 0 8 1 5 HP use ø15 88 for the gas pipe Table 2 Piping conection size for CH unit Model Low pressure gas pipe mm High pressure gas pipe mm Gas pipe mm CH 6 0N1 ø15 88 ø15 88 ø15 88 CH 10 0N1 ø19 05 ø19 05 ø19 05 1 2 5 6 CH 3 4 IU IU 1 Upstream 2 Downstream 3 Low pressure gas pipe 4 High pressure gas pipe 5 Multi kit 6 Gas pipe IU Indoor unit C...

Page 76: ... Ø15 88 CH Unit 9 A In case that a branch is located downstream of the CH unit and also the connected indoor unit capacity is 0 8 1 5 HP perform the flaring work of the field gas pipe and connect it to the CH unit Connected indoor unit capacity HP CH 10 0N1 6 1 to 8 0 1 Ø19 05 2 Ø15 88 4 4 5 CH Unit 9 8 5 Ø19 05 6 8 0 to 10 0 1 Ø22 2 2 Ø19 05 4 4 4 CH Unit 9 5 Ø22 2 1 Low pressure gas pipe field s...

Page 77: ...3 2 2 CH Unit 3 1 Insulation 2 Clamp 3 Upper surface ID Inner diameter NOTE In case that the humidity inside the ceiling is high apply additional insulation to the flare nut connection Refer to the chapter initial check Initial check see on page 23 for more details 3 Piping work and refrigerant charge 70 SMGB0065 rev 1 12 2010 ...

Page 78: ...1 3 Connection of the power supply circuits 73 4 1 4 Setting of the DSW switches on PCB1 78 4 1 5 Electrical wiring diagram RAS 8 18 FSXN 82 4 2 CH unit 83 4 2 1 General information 83 4 2 2 General verifications 83 4 2 3 Electrical wiring connection CH units 83 4 Electrical wiring 71 SMGB0065 rev 1 12 2010 4 ...

Page 79: ...ectors and connection terminals have been selected correctly in line with the electrical data given a The electricity supply to the unit should be via an exclusive power control switch and protective circuit breaker certified and installed in accordance with local or national safety regulations b The electricity supply for the outdoor and indoor units should be separate Connect the voltage supply ...

Page 80: ...10 5 5 RAS 18FSXN 31 10 8 1 The cross sections of the cable should be selected for the maximum current of the unit in accordance with European Standard EN60 335 1 2 The cross sections of the cable have been selected for the maximum current of the unit in accordance with MLFC cable Flame Retardant Polyflex Wire manufactured by HITACHI Cable Ltd Japan NOTE Do not use cables that are lighter than the...

Page 81: ...to ensure if necessary consulting the distribution grid operator that the unit is connected only to a power supply where the short circuit power is greater than or equal to xx see Ssc column RAS 14FSXN 5089 RAS 16FSXN 1593 RAS 18FSXN 1532 The authorities responsible for the electrical power supply can apply restrictions relating to harmonics RAS 12FSXN Unit s outside the scope of IEC 61000 3 12 Co...

Page 82: ...wer supply wiring H shielded twist pair cable NOTE Completely seal the entrance to the duct using sealant etc to prevent water from entering Tighten the connection terminals as shown in the following table Size Tightening torque Nm M4 1 0 1 3 M5 2 0 2 4 M6 4 0 5 0 M8 9 0 11 0 M10 18 0 23 0 Connection of indoor units Connect each outdoor unit to a power supply line Install an earth leakage breaker ...

Page 83: ...door unit Between the outdoor unit and the CH unit Between the outdoor unit and the indoor unit on other refrigerant cycles CAUTION Do not connect power cables to communication terminals TB2 This could damage the circuit board For heat recovery systems connect the communication cable on the indoor unit used exclusively for refrigeration to TB2 terminals 1 and 2 on the CH unit Connect the earth wir...

Page 84: ...nit B Operation wiring shielded twisted pair cable or shielded pair cable 5 Vdc non polar H LINK field supplied C Distribution box field supplied D Indoor units E Operation wiring shielded twisted pair cable or shielded pair cable field supplied F Fuse field supplied G PC ART remote control H Indoor unit system No 0 I Indoor unit system No 1 J Transmission wire between A and A1 CB Circuit breaker ...

Page 85: ...plied D Indoor units E Operation wiring shielded twisted pair cable or shielded pair cable field supplied F Fuse field supplied G PC ART remote control H Indoor unit system No 0 I Indoor unit system No 1 J CH unit K Transmission wire between A and A1 CB Circuit breaker field supplied ELB Earth Leakage Breaker field supplied 4 1 4 Setting of the DSW switches on PCB1 Location of the DSW switches on ...

Page 86: ... 3 4 and 5 for checking DSW1 RSW1 refrigerant cycle number setting Setting required Setting before RSW1 supply 0 Setting before DSW1 supply 0 digit of tens Set each outdoor unit number on each refrigerant cycle Outdoor and indoor units belonging to the same refrigerant cycle set the same cycle number in the outdoor and indoor units indoor units DSW5 and RSW2 DSW1 RSW1 setting example for refrigera...

Page 87: ...OTE This combination of outdoor units must be set Setting for combination of units A unit 1 main B unit 2 C unit 3 2 1 ON 3 4 1 2 1 ON 3 4 2 1 ON 3 4 2 1 ON 3 4 A B C DSW7 supply voltage setting Setting not required 400V DSW10 communication setting Setting required A setting before supply B cancellation of final resistance NOTE C If the communication circuit fuse has opened the PCB1 board can only...

Page 88: ... E E E E E E E E E E A Main unit B Secondary unit C Secondary unit D Indoor units E Remote control NOTE Where two or more outdoor units are connected using the H LINK or H LINKII DSW10 contact 1 on the master or main unit must be set to OFF from the second refrigerant group of outdoor units If only one unit is installed the setting is not necessary 4 Electrical wiring 81 SMGB0065 rev 1 12 2010 4 ...

Page 89: ...4 1 5 Electrical wiring diagram RAS 8 18 FSXN 4 Electrical wiring 82 SMGB0065 rev 1 12 2010 ...

Page 90: ... shielded part to the earth screw in the electrical box of the indoor unit as shown the next page figure 4 2 2 General verifications 1 Make sure that the field selected electrical components main power switches circuit breakers wires conduit connectors and wire terminals have been properly selected according to the electrical data indicated in Technical Catalogue Make sure that the components comp...

Page 91: ...t A Power source cable size Transmitting cable size Earth wire size mm2 EN60 335 1 mm2 1 MLFC mm2 2 EN60 335 1 mm2 1 MLFC mm2 2 CH 6 0N1 1 220 240V 1Ø 50Hz 1 0 75 0 5 0 75 0 5 2 0 CH 10 0N1 NOTE Follow local codes and regulations when selecting field wires The wire sizes marked with 1 in the above table are selected at the maximum current of the unit according to the European Standard EN60 335 1 U...

Page 92: ...same CH unit the operation mode cooling heating for the indoor units will be the same NOTE Do not apply excessive voltage to the operating line DC5V non pole between outdoor unit and CH unit between CH unit and indoor unit between CH units Use 2 Core cable for the operating line Do not use 3 Core cable or over Connect the operating line for the outdoor unit to the terminal 1 and 2 of TB2 on the CH...

Page 93: ...f it is done the unit will be outside of warranty Before setting DIP switches firstly turn OFF power source and set the position of the DIP switches If the switches are set without turning OFF the power source the switches can not function NOTE The symbol indicates the position of the DIP switches Figures show setting before shipment 4 Electrical wiring 86 SMGB0065 rev 1 12 2010 ...

Page 94: ...99 5 2 4 Dry operation continued 100 5 2 5 Antifreeze protection control during the cooling or dry operation 101 5 2 6 Heating operation 102 5 2 7 Heating operation continued 103 5 2 8 Defrost operation 104 5 2 9 Excessive high discharge air temperature prevention control only for RCI RCD and RPI 6 HP 105 5 2 10 Protection control 106 5 2 11 Control of CH unit CH 6 0 10 0 N1 109 5 3 Control and sa...

Page 95: ...he compressor to reach the objective value TdSH control Control TdSH of the compressor to reach the objective value TdSH control Electronic expansion valve for the indoor unit heat exchanger Indoor unit heat exchanger SH PI control is carried out to reach objective value in the indoor unit heat exchanger SH Cooling setting Indoor unit heat exchanger SH Cooling setting PI control is carried out to ...

Page 96: ...rotation control is carried out to match its operation time in each of the outdoor units This control is carried out during the Thermo OFF of the outdoor unit In case of switch OFF or Thermo OFF after 120 minutes of operation the inverter compressor with the shortest operation time will be preferably turned on NOTE In order to carry out this function at least two outdoor units are required The ope...

Page 97: ...r compressor C Constant compressor RAS 50 54 FSXN Outdoor unit 1 Outdoor unit 2 Outdoor unit 3 I C I C I C Last time 1 4 2 5 3 6 Currently 2 5 3 6 1 4 Next time 3 6 1 4 2 5 I Inverter compressor C Constant compressor Compressor frequency control Operational control is carried out to optimise the compressor output frequency or to carry out the turning on and stopping while in constant operation in ...

Page 98: ...equency 50 Hz A Compressor operation condition B Frequency of Inverter compressor Hz C Target frequency Hz D Inverter compressor E Two Inverter compressors RAS 22 26 FSXN Power supply frequency 50 Hz A Compressor operation condition B Frequency of Inverter compressor Hz C Target frequency Hz D Inverter compressor E Two Inverter compressors F Inverter compressor constant compressor 5 Control system...

Page 99: ... 162 165 34 62 65 122 125 172 175 36 62 65 122 125 182 185 RAS 38 42 FSXN Power supply frequency 50 Hz A Compressor operation condition B Frequency of Inverter compressor Hz C Target frequency Hz D Inverter compressor E Two Inverter compressors F Three Inverter compressors G Three Inverter compressors constant compressor HP Objective frequency Hz 1 2 3 4 5 6 38 62 65 93 130 143 180 40 62 65 93 130...

Page 100: ...supply frequency 50 Hz A Compressor operation condition B Frequency of Inverter compressor Hz C Target frequency Hz D Inverter compressor E Two Inverter compressors F Three Inverter compressors G Three Inverter compressors constant compressor H Three Inverter compressors two constant compressors I Three Inverter compressors three constant compressors HP Objective frequency Hz 1 2 3 4 5 6 7 8 9 10 ...

Page 101: ...the heat exchanger SH objective value The number of outdoor unit 1 Heat exchanger mode Cooling mode Mainly cooling mode Mainly heating mode Heating mode Defrost mode COND D1 D1 1 D4 EVAP DEF1 Heat exchanger condition COND COND cond EVAP EVAP COND Reversing valve RVR2 OFF OFF OFF ON ON OFF RVR1 ON OFF OFF OFF OFF ON Expansion valve MV1 Pd Pd Heat exchanger SH Completely open MVB TdSH TdSH Ps protec...

Page 102: ...Single Signal Operation Signal Wireless Remote Control Switch Remote Control MCU Remote Control MCU Wireless Transmission Circuit Remote Control Switch Electrical Control Expansion Valve Drive Circuit Relay Drive Circuit MV MS MD MIF Indoor Unit Fan Control Circuit Protection Circuit Indoor Unit MCU A D Conversion Circuit A D Conversion Circuit Transmission Circuit Transmission Circuit Transmissio...

Page 103: ...or the drain pump MV Electronic expansion valve for the indoor unit MV1 Electronic expansion valve for the outdoor unit MVB Electronic expansion valve for the plate heat exchanger CMC1 2 Magnetic contactor for the compressor SVA Solenoid valve SVG Solenoid valve RVR1 2 Reversing valve PSH1 2 High pressure switch CH1 2 Compressor heater resistance CTu v Current sensor 5 Control system 96 SMGB0065 r...

Page 104: ...Control Switch Low High Medium ON Lower than Activation Level OFF Higher than Activation Level Switch Increasing Set Temp Switch Decreasing Set Temp Air Flow Change Over Switch Setting at COOL I U O U Indoor Unit Outdoor Unit Power to I U ON Pressing Temp Switch Pressing FAN Switch Pressing RUN STOP Switch FS to 1 Cooling Operation Higher than Set Temp Thermo ON Lower than Set Temp Thermo OFF Outd...

Page 105: ...er Stop of Auto Louver only for Air Panel or Indoor Unit with Auto Louver Power to MIF OFF RUN STOP Lamp OFF COOL Set Fan Speed Set Temp Indication Continuously ON Power to PCB in I U OFF Electronic Expansion Valve in I U Fixed Opening LCD Indication OFF Power to I U OFF Pressing RUN STOP Switch I U Indoor Unit 5 Control system 98 SMGB0065 rev 1 12 2010 ...

Page 106: ...ivation Level OFF Higher than Activation Level Setting at DRY I U O U Indoor Unit Outdoor Unit MD ON DRY Indication Set Temp indicated Switch Increasing Set Temp Switch Decreasing Set Temp FS Pressing RUN STOP Switch Run LED ON RUN is indicated to 2 PID Control for I U Electric Expansion Valve Higher than Set Temp Lower than Set Temp I U Air Intake Temp Outdoor Temp 5 C 5 C DRY Operation 3 min MIF...

Page 107: ...er Stop of Auto Louver only for Air Panel or Indoor Unit with Auto Louver Power to MIF OFF RUN STOP Lamp OFF COOL Set Fan Speed Set Temp Indication Continuously ON Power to PCB in I U OFF Electronic Expansion Valve in I U Fixed Opening LCD Indication OFF Power to I U OFF Pressing RUN STOP Switch I U Indoor Unit 5 Control system 100 SMGB0065 rev 1 12 2010 ...

Page 108: ... Temp Pipe Surface Temp of Indoor Heat Exchanger or Gas Pipe Surface Temp Is it continuous for more than 3 min MIF Operation at Set Fan Speed In Case of DRY Operation MIF OFF for 6 min No Yes Is it continuous for more than 3 min 6 min in case of DRY Operation 2 C 14 C 2 C 14 C No Yes After 15 min Liquid Pipe Temp of Indoor Heat Exchanger Fully Closed Electronic Expansion Valve in Indoor Unit The j...

Page 109: ...tch MIF Operation at Slow Speed Indoor Fan Stop for 3 min at max Run LED ON RUN ON Power to I U ON Setting Required Temp Setting Fan Speed Setting Operation Mode at HEAT Power to PCB in I U ON only for Indoor Unit with Auto Louver Auto louver 0 Reset Low High Medium Switch Increasing Set Temp Switch Decreasing Set Temp Air Flow Changeover Switch HEAT Indication HIGH Indication LOW Indication Indic...

Page 110: ...ection Operation Slow Indoor Fan MIF Speed 50 C 2 min after 2 min 40 C 40 C Indoor Fan Motor MIF OFF Indoor Unit Discharge Air Temp 50 C STOP Power to PCB in I U OFF Electronic Expansion Valve in I U and O U Fixed Opening RUN LED OFF HEAT Set Air Flow Set Temp Indication Continuously ON LCD Indication OFF Power to I U OFF Operation at Slow Indoor Fan Speed Indoor Unit Discharge Air Temp 5 Control ...

Page 111: ...g Degree of Electronic Expansion Valve PID Control for Super Cooling Electronic Expansion Valve RVR2 ON Compressor Operating at Low Frequency High Frequency Operation 1 Minute Later 1 The defrost signal is transmitted to the indoor unit during the defrost operation After the signal is received the remote control liquid crystal display indicates DEFROST and the indoor unit fan stops 2 For heat reco...

Page 112: ...r temperature prevention control only for RCI RCD and RPI 6 HP No Yes Yes No Thermo ON OFF Control of Indoor Unit Thermo OFF Thermo ON Heating Operation Discharge Air Temp of Indoor Unit Is it continuous more than 3 min Discharge Air Temp of Indoor Unit Is setting temp lower than inlet air temp of Indoor Unit 10 5 0 15 6 10 10 5 15 15 2 5 6 10 15 21 A B D C 5 Control system 105 SMGB0065 rev 1 12 2...

Page 113: ... pressure protection control The high pressure protection control is carried out to prevent the protection device from being activated due to an increase in high pressure during an anomaly and protect the compressor from excessive high pressure increases Operation mode P1 P2 P3 Cooling 3 45 3 40 3 20 Heating Heat recovery 3 35 3 30 3 10 NOTE 1 In the case of base unit combinations the control of t...

Page 114: ...allowed D Abnormal stoppage cause of the stop d1 17 1 For 180 seconds Inverter fin temperature increase protection control The inverter fin temperature increase protection control is carried out to prevent the damage of the inverter caused by the increase in inverter fin temperature NOTE 1 In the case of base unit combinations the control of the figure is carried out for the whole outdoors units t...

Page 115: ...ection control is carried out to protect the compressor from a transitory decrease in suction pressure NOTE 1 In the case of base unit combinations the control of the figure is carried out for the whole outdoor units to be connected 2 In order to carry out this control the suction temperature of each outdoor unit is calculated and the maximum value is used Ps suction pressure sensor detected value...

Page 116: ...N normal D degeneration 5 2 11 Control of CH unit CH 6 0 10 0 N1 The following table shows the expansion valve opening of CH unit at the steady condition The expansion valve opening right after the operation mode change such as thermo ON thermo OFF may not be matched with the table below Make sure that the opening should be checked after at least 6 minutes of mode change 1 Checking Method of CH Un...

Page 117: ...s included as cooling operation b When Outdoor Unit Compressor is Operated Refer to the table below for the expansion valve opening of CH unit when outdoor unit compressors are operated Outdoor unit Operation condition CH unit Expansion valve Indoor Unit Operation Mode Remote Control Setting Cooling Heating Cooling Thermo OFF Heating Thermo OFF FAN Cooling mode MVS1 600 600 600 600 MVS2 480 480 48...

Page 118: ...ing cold starts and remains enabled when the compressor is at a standstill Model RAS 8 12 FSXN RAS 14 18 FSXN Compressor Pressure switches Automatic restart one per compressor High pressure Disconnection MPa 4 15 0 05 0 15 Connection MPa 3 20 0 15 Fuse capacity 3N 400V 50Hz 40x2 40x2 32x2 Oil heater Power W 40x2 40x4 CCP timer Not adjustable Time setting min 3 Direct current module for fan Fuse ca...

Page 119: ...he Thermo OFF in heating mode 130 6 3 2 Night shift Low noise 131 6 3 3 Cancellation of the outdoor ambient temperature limit 132 6 3 4 Defrost for cold area change of defrost condition 133 6 3 5 SLo defrost setting 133 6 3 6 Cancellation of hot start 133 6 3 7 Demand function setting 133 6 3 8 Wave function setting 134 6 3 9 Cold draft protection 134 6 3 10 Adjustment of fan rotation 134 6 Option...

Page 120: ...e PSW in outdoor unit A setting from the PSW in outdoor unit B and C is valid 1 Press PSW1 for 3 seconds when remote control switches are OFF The Menu mode will be indicated 2 After carrying out the configuration press PSW1 for 3 seconds when the Menu mode is indicated The display will return to normal indication PSW4 PSW2 PSW4 PSW2 PSW1 PSW1 A B Menu mode PSW1 6 Optional functions 114 SMGB0065 re...

Page 121: ...f 80 current demand 10 Control of 100 current demand 11 Low noise level setting 1 12 Low noise level setting 2 13 Low noise level setting 3 0 Without setting Control function number Configuration of output functions 1 Operating signal 2 Alarm signal 3 Compressor ON signal 4 Defrost signal The following functions are set before shipment Name of the input terminal Connector pin number Setting functi...

Page 122: ...SW1 ON 3 After selecting Input Output Terminal Name press PSW3 or PSW5 and then choose Control Function No A By pressing PSW3 the number increases by 1 By pressing PSW5 the number decreases by 1 Control Function No 13 Press PSW3 return to 0 4 After the function number is selected press PSW1 for 3 seconds The display will return to its normal indication The selected contents will be memorised in th...

Page 123: ...oltage cables ground it one of the end of the shield cable The maximum length must be within 70 m Fixing of the heating mode Control function number 1 Fixing of the cooling mode Control function number 2 When the input terminals for setting the operation mode of the outdoor unit PCB1 are short circuited the operation mode can be fixed for cooling or heating mode Short circuit between terminals 1 a...

Page 124: ...ce X1 Auxiliary relay SS3 Demand stoppage switch Outdoor unit fan motor start stop Control function number 4 When the outdoor unit PCB1 input terminals for the outdoor unit fan motor are short circuited during the compressor stoppage all the outdoor unit fans will be operating at maximum speed However if the compressor is activated via the compressor operation the fan operation changes to normal c...

Page 125: ...e outdoor unit which is set at 100 80 70 60 and 40 The maximum running current of the outdoor unit will be selected as described in procedure External input and output setting see on page 115 Short circuit terminals 1 and 2 input 3 of CN18 to configure the current demand If the running current of the outdoor unit increases above the limit the indoor unit is put in Thermo OFF condition Stoppage cod...

Page 126: ...ompressor frequency and the outdoor unit fan frequency necessarily decreases The range of operation may be restricted In some cases the sound operation key values can be temporarily higher than the values in the table X1 1 2 CN18 X SS3 X1 a b c d a 3 pin connector b Outdoor unit PCB1 c Control circuit d Power source X1 Auxiliary relay SS3 Demand current stoppage Example Low noise setting 2 during ...

Page 127: ...lation or humidification operation Terminals 1 and 2 output 1 of the CN16 to set the operation signal a Auxiliary relay b 3 pin connector c Connector CN16 d Outdoor unit PCB1 Alarm signal Control function number 2 This function is used to receive the alarm signal The auxiliary contact relay RYa is closed when the alarm occurs The alarm signal will be sent to output terminals when the indoor units ...

Page 128: ... receive the defrosting signal The auxiliary contact relay RYa is closed during defrosting Terminals 1 and 3 output 2 of the CN16 to configure the defrost signal a Auxiliary relay b 3 pin connector c Connector CN16 d Outdoor unit PCB1 1 3 CN16 RYa RY b c a d 1 2 3 1 3 CN16 RYa RY b c a d 1 2 3 6 Optional functions 122 SMGB0065 rev 1 12 2010 ...

Page 129: ...W3 and PSW5 the function No can be selected PSW4 forward PSW2 backward Fill out the selected function setting No in the space of the table as shown SET Example 1 Item SEG2 SEG1 SET 1 Input Setting 1 CN17 1 2 pin i1 1 2 Input Setting 2 CN17 2 3 pin i2 2 3 Input Setting 3 CN18 1 2 pin i3 3 4 Output Setting 1 CN16 1 2 pin o1 1 5 Output Setting 2 CN16 1 3 pin o2 2 Setting before shipment Before shippi...

Page 130: ...rculator at Heating Function Thermo OFF FA 0 2 Night Shift ni 0 3 Cancellation of Outdoor Ambient Temperature Limit GS 0 4 Defrost for Cold Area Change of Defrost Condition Jo 0 5 SLo Fan Speed Defrost Setting bJ 0 6 Cancellation of Hot Start H 0 7 Priority Capacity Mode nU 0 8 Compressor Frequency Control Target Value for Cooling Hc 0 9 Compressor Frequency Control Target Value for Heating Hh 0 1...

Page 131: ... Not Prepared F2 0 26 Not Prepared F3 0 3 End of setting Press PSW1 for more than 3 seconds The display indication change to normal indication Turn OFF DSW4 4 NOTE After the setting is completed check that Menu is not shown in the display otherwise the air conditioner may not operate correctly 6 Optional functions 125 SMGB0065 rev 1 12 2010 6 ...

Page 132: ...ot Available Not Available Available Available Available Available Available Available Available Available Defrost for Cold Area Change of Defrost Condition SLo Fan Speed Defrost Setting Cancellation of Hot Start Priority Capacity Mode Indoor Expansion Valve Control Target Value for Heating Need No Setting Indoor Expansion Valve Control Target Value for Cooling Need No Setting Compressor Frequency...

Page 133: ... PSW5 PSW3 PSW5 Not Available Not Available Not Available Not Available Not Available Not Prepared Not Prepared Not Prepared Not Prepared Not Prepared Not Prepared Low Noise Setting Cold Draft Protection Fixing of Demand Function Adjustment of Fan Rotation Wave Function Setting Available Available Available Available Available Available Available Available Available Available Available Available A...

Page 134: ...g defrost operation 6 Cancellation of the hot start HT 00 Hot start available 01 Cancellation of the hot start 7 Priority capacity mode nU 00 No setting 01 Change in the maximum frequency limit value 02 Change in the current limit value 03 Change in the maximum frequency limit value and the current limit value 8 Target value of the compressor frequency for cooling Hc 00 Initial setting Targeted va...

Page 135: ...heating mode So 00 Thermo OFF unit expansion valve opening 150 325 pulses 01 Opening of the expansion valve 0 8 2 6 HP 175 pulses 2 5 HP or greater 300 pulses 02 Opening of the expansion valve 0 8 2 6 HP 100 pulses 2 5 HP or greater 150 pulses 03 09 Not prepared If set the setting item will be ignored by the control PCB 14 Indoor expansion valve initial opening of Thermo ON indoor unit in heating ...

Page 136: ...tection Fb 00 Initial setting 01 Outlet temperature 10 C 02 Outlet temperature 12 C 03 Outlet temperature 14 C 21 Not prepared FT 00 22 Fan rotation adjustment to prevent humming noises in multiple installation Fo 00 Initial setting 01 Change of fan rotation 15 rpm 02 Change of fan rotation 30 rpm 23 Not prepared LT 00 24 Not prepared F1 00 25 Not prepared F2 00 26 Not prepared F3 00 6 3 1 Indoor ...

Page 137: ...vel operation is required especially at night 1 Outdoor fan o C A Maximum rotation Rotation ratio B Outdoor temperature NOTE Maximum rotation is always 100 rotation ratio for the standard unit No limitation of the outdoor temperature 2 Frequency range cooling operation When Night Shift is not Set ni 0 When Night Shift is Set ni 1 Outdoor unit capacity HP Minimum frequency Hz Maximum frequency Hz C...

Page 138: ...tinued under a low temperature The limitation of the outdoor unit temperature area for heating mode is shown in the picture Setting condition Operation mode for cancellation 1 Heating 2 Cooling 3 Heating Cooling Heating operation A Indoor suction air temperature B Operation stoppage area C Outdoor temperature The limitation of the permissible outdoor temperature area in heating operation factory s...

Page 139: ...or fan stops during the defrost operation and starting of heating operation However the indoor fan can operate at low speed during the defrosting operation and starting of heating operation Setting condition Indoor fan operation 0 Indoor fan stop when heating operation starts Indoor fan stop during defrost operation 1 Indoor fan SLo during defrost operation 2 Indoor fan SLo when heating operation ...

Page 140: ...0min 20min 10min 20min A B A Electricity consumption 100 B Electricity consumption 40 to 80 Setting condition Current setting 1 40 2 60 3 70 4 80 6 3 9 Cold draft protection Press PSW3 and select the setting condition 1 to 3 to set the cold draft protection Fb When the indoor unit discharge air temperature drops to C and below at cooling operation the outdoor unit fan stops and the compressor freq...

Page 141: ...h 138 7 2 3 Test run from the outdoor unit 138 7 2 4 Checking at test run 140 7 2 5 Refrigerant cycle checklist 141 7 2 6 Automatic judgement system for refrigerant amount 143 7 2 7 Reset for accumulated operation time of compressor 1 2 after maintenance cUJ1 cUJ2 145 7 2 8 Test run check list 146 7 Test run 135 SMGB0065 rev 1 12 2010 7 ...

Page 142: ...3 4 Indoor unit TB2 1 2 A B CH unit TB2 1 2 3 4 Check that all the cables L1 L2 L3 and N R S and T are correctly connected to the power supply line If they are not correctly connected the unit will not work and the remote control will indicate alarm code 05 When this happens check and change the phase of the power supply line according to the sheet on the back of the service cover CAUTION Make sur...

Page 143: ...8 have been completed turn ON power supply to the outdoor unit The electricity is provided to the crankcase heater to heat the compressor The compressor may be damaged if not pre heated Therefore the compressor must be activated after the power supply is turned ON for at least 12 hours 10 Indoor and outdoor temperature To be used with cooling and heating operation Is the indoor temperature 27 C DB...

Page 144: ...The unit does not start The connecting wires of operating line are incorrect or loosened The unit does not start The connection of remote control cable is incorrect This is the same as item 3 1 2 and 3 The unit does not start or starts once and then stops The connection of the thermistors or other connectors are incorrect Tripping of protector exists or else Check by the alarm code table in the se...

Page 145: ...hen ensure you turn the power OFF to the indoor units in another refrigeration system in order to not carry out the test run Outdoor Unit Test Run Power OFF Indoor Unit The setting of DSW4 is not required for the test run from the remote control Manual OFF of the compressor 1 Setting Compressor manual OFF set DSW4 4 to the ON position 2 Reset Compressor ON set DSW4 4 in the OFF position 1 When DSW...

Page 146: ...low is smooth 2 Power supply voltage Check the power supply If the power supply is abnormal contact the electric company In general the voltage drop V2 occurs when starting as shown in the figure Initial Voltage Voltage Change V1 Starting Voltage V2 Operating Voltage V3 In order to protect the device comply with the following normal power supply voltage ranges Normal power supply voltage range Sup...

Page 147: ... OPERATION CUSTOMER ______________________ INSTALLER __________________________________ DATE ___________________ OUTDOOR UNIT MODEL __________________ OUTDOOR UNIT SERIAL NO ________________ INSPECTOR __________________ Indoor unit model Indoor unit serial number Piping length ________ m Additional refrigerant charge ________ kg 1 General No Check item Result 1 Combination of base units Is the set...

Page 148: ...mperature It is normal whenTG Ti 5 C TL thermistor failure Indoor unit expansion valve completely closed or partially open Short circuit 5 Is there any excessive difference between indoor unit at SH TG TL of indoor unit heat exchangers This is applicable when the inlet air temperature is 3 C higher than setting It is normal if the difference between units is within 7 C TL TG thermistor failure Ind...

Page 149: ...C when iE indoor unit expansion valve is 100 The difference in temperature between indoor units means the following b3 discharge air temperature b2 air inlet temperature indicated on the remote control by the check mode However this is only applicable when b2 Air inlet temperature b1 setting temperature is higher than 3 C Failure such as PCB wiring indoor unit expansion valve and coil Excessive pr...

Page 150: ...ng operation Before starting check the indoor and outdoor air temperature 3 Check the 7 segment display and press PSW1 The outdoor unit fan and the compressor will be activated The display will indicate The judgement takes between 30 and 40 minutes to carry out Check the data obtained against the following table When the result of the test is excessive refrigerant charge insufficient refrigerant o...

Page 151: ...ome cases when the number of indoor units connected exceeds the maximum recommended number and the outdoor temperature is over 35 C this check cannot be carried out 4 Is the total indoor units operating total capacity ratio 30 or lower 5 Is contact 4 of DSW4 compressor forced stoppage in the OFF position 4 Place contact 4 of DSW5 on PCB1 to the OFF position when the refrigerant amount is sufficien...

Page 152: ...emperature of the refrigerant Discharge gas temperature Td _____ C Liquid pipe temperature Te _____ C 8 Check the pressure Discharge pressure Pd _____ MPa Suction pressure Ps _____ MPa 9 Check the voltage Rated voltage _____ V Operating voltage L1 L2 _____ V L1 L3 _____ V L2 L3 _____ V Starting voltage _____ V Phase imbalance 1 V Vm _____ 10 Check the compressor input running current Input _____ k...

Page 153: ...r unit 159 8 1 7 Abnormal operation of the devices 160 8 2 Procedure for troubleshooting 168 8 2 1 Alarm codes 168 8 3 Troubleshooting by alarm code 170 8 3 1 Alarm codes 170 8 4 Troubleshooting in the check mode by using the remote control switch 238 8 5 Troubleshooting by using the 7 segment display 245 8 6 RSW DSWs and LEDs functions 257 8 7 Checking procedures for each main part 262 8 7 1 Self...

Page 154: ... 5 V between the outdoor and the indoor unit coincide properly according to the chapter 4 Otherwise some components will be damaged Check the connection of the wiring to the PCB and ensure that the following connections are not loose or removed 1 Thermistor connector each of them 2 Remote control cable connector 3 Transformer connector 4 Each connector of the main power supply circuit Check and en...

Page 155: ...eived from indoor unit in normal mode As for the following alarm codes however alarm code will be displayed on the 7 segment when alarm is detected by outdoor unit itself Alarm Code 03 Abnormal Transmission between Indoor Unit and Outdoor Unit Alarm Code 35 Incorrect Indoor and Outdoor Unit No Setting B Alarm code of smaller indoor unit address No will be displayed when alarm is received from mult...

Page 156: ...2 PSW4 PSW2 PSW2 PSW1 PSW4 PSW2 PSW4 PSW2 PSW4 PSW2 PSW4 PSW2 PSW4 PSW2 History is displayed up to 15 cases at the maximum in alarm occurrence order Alarm Inverter Retry Fan Controller Indication of Stoppage Cause Item AC d1 c1 Contents Alarm Code Retry Stoppage Micro Computer Reset Alarm Retry Code Item Contents Seg2 Seg1 10th 1st Outdoor Unit No Compressor Fan Controller No Alarm Retry Code Indi...

Page 157: ...art of the compressor Accumulated time AC O O d1 15 Accumulated time d1 O O 0A Abnormality transmitting between the outdoor units Accumulated time AC 0b Incorrect outdoor unit adress setting Accumulated time AC 0c Incorrect setting of the main outdoor unit Accumulated time AC 21 Abnormality high pressure sensor Accumulated time AC O 22 Abnormality of thermistor for outdoor air temperature Accumula...

Page 158: ...ulated time d1 O 45 Abnormality of high pressure increase Accumulated time AC O d1 13 Accumulated time d1 O 47 Activation of the low pressure decrease protection device Vacuum operation protection Accumulated time AC O d1 15 Accumulated time d1 O 48 Activation of the Inverter overcurrent protection device Accumulated time AC O O iTC d1 17 Accumulated time d1 O O iTC 51 Abnormal Inverter current se...

Page 159: ...tion between the indoor unit and the outdoor unit Accumulated time Ci 4 Restarting of the microcomputer due to a status control malfunction Accumulated time Ci 6 1 Alarm details AC alarm d1 retry Ci control information iTC Inverter stoppage code FTC Fan controller stoppage code Deletion of the alarm code history Press PSW1 and PSW3 for five seconds to delete the alarm code history while it is show...

Page 160: ...ailure of the constant speed compressor Abnormal discharge gas thermistor on the upper part of the compressor 39 Abnormal operating current in constant speed compressor Procedure remote control PC ART Simultaneously pressing the pushbuttons TEMP and A for 3 seconds will start the emergency operation mode The message EMG B is displayed on the remote control screen Operating condition The emergency ...

Page 161: ...Abnormal discharge gas thermistor 48 Activation of the overcurrent protection device 51 Abnormal Inverter current sensor 53 Inverter error signal detection 54 Abnormal Inverter fin temperature a Procedure 1 Turn OFF the main switches to all the indoor and outdoor units 2 Check the inverter PCB if it is damaged disconnect terminals U V W from the diode module isolate the disconnected terminals 3 Tu...

Page 162: ...essor due to the setting of DSW5 If the thermistor is short circuited this operation is available NOTE Measure the insulation resistance of the constant speed compressor Do not activate the emergency operation when the insulation resistance is 0 Ω Another compressor may be damaged due to the possibility that refrigerant oil may be oxidized In emergency operation the compressor frequency cannot nor...

Page 163: ...its protection under the following conditions Total capacity of Thermo ON indoor unit 50 capacity of the outdoor unit Total capacity of Thermo ON outdoor unit 10 HP The lack of Thermo ON in the indoor unit can cause a failure of the constant speed compressor because it gets turned on and stops repeatedly NOTE Measure the insulation resistance of the Inverter compressor Do not activate the emergenc...

Page 164: ...easure resistance between wires and insulation resistance Replace the AC chopper for indoor fan fan motor and fuse Failure of AC Chopper for Indoor Fan Replace the AC chopper for indoor fan and fuse Replace the AC chopper for indoor fan fan motor and fuse Replace the AC chopper for indoor fan and fuse Short Circuit Supplied between Wires Melted Fuse at Control Circuit Check for any uncovered part ...

Page 165: ... remote control Flashes every two seconds Cause Check Item Action Turn OFF Main Switch Check cable and connections Repair cable or connect it Phenomenon Disconnection or Insufficient Contacting of Remote Control Cable Check wiring and connections Repairing Incorrect Wiring Connection Incorrect Polarity Failure of Remote Control Switch Check it by self checking mode 1 Check it by self checking mode...

Page 166: ...fan motor Failure of Outdoor Unit Fan Motor Disconnected Coil Measure insulation resistance Burnt Out Coil Check connections Failure of One of PCBs Disconnected Wiring to PCB Check PCB by self checking 1 Correctly connect wiring Replace PCB if failed Check it by self checking 1 Check it by Check Mode 2 Failure of PCB Replace or correctly connect wires if abnormality exists Failure of Air Inlet The...

Page 167: ...et for input signal actually used If no signal is used set at 00 Cause Check Item Action Turn OFF Main Switch Phenomenon 1 Refer to Self checking of the remote control switch see on page 265 2 Refer to Troubleshooting in the check mode by using the remote control switch see on page 238 3 Even if the controllers are correct the compressor does not operate under the following conditions Indoor air t...

Page 168: ...Reversing Valve Disconnected Reversing Valve Coil Enforced power supply Replace reversing valve Incorrect Activation of Reversing Valve Check connectors Failure of Outdoor Unit PCB Disconnected Wires to PCB Correctly connect wiring Replace it when check mode is not available Failure of PCB Check PCB by self checking 1 Check connectors Failure of Indoor Unit PCB Disconnected Wires to PCB Correctly ...

Page 169: ...et of strainer Replace strainer in indoor unit Clogged Strainer in Indoor Unit Clogging at Low Pressure Piping Check for clogging Remove clogging Check for connection cord and connector Replace connector Check for clogged air filter Clean air filter Check for obstacle at inlet or outlet Remove obstacles Excessively Low Air Temp to Indoor Unit Heat Exchanger Insufficient revolution of indoor unit f...

Page 170: ... Speed Replace fan motor Insufficient Air Flow to Outdoor Unit Heat Exchanger Check for clogging Remove clogging Check for connecting cord and connector Replace connector Is there operation sound from coil Replace coil Is thermistor on compressor normal Replace thermistor Is thermistor installed correctly on compressor Correctly install it Failure or Malfunction of Expansion Valve Check temp diffe...

Page 171: ... Outdoor Unit Heat Exchanger Measure field supplied piping Use specified pipes Excessively Small Diameter or Long Piping Is outdoor unit heat exchanger clogged Remove clogging Is there any obstacles at inlet or outlet of outdoor unit Remove obstacles Is service space for outdoor unit sufficient Secure sufficient service space Check for speed of outdoor unit fan Replace fan motor Insufficient Air F...

Page 172: ... obstacles Check indoor fan speed Replace fan motor Insufficient Air Flow to Indoor Unit Heat Exchanger Check temp difference between inlet and outlet of reversing valve Check for leakage of solenoid valve Excessively High Suction Pressure Failure of Bypass Solenoid Valve Replace solenoid valve Replace failed expansion valve of indoor unit Replace reversing valve Malfunction or Internal Leakage of...

Page 173: ... Fan Runner is Hitting Casing Check it by viewing Adjust position of propeller fan Outdoor Unit Propeller Fan is Hitting Shroud Check surface of contacts Replace magnetic switch Hamming Sound from Magnetic Contactor Check each fixing screws Tightly fix it Abnormal Vibration of Cabinets Check obstacles Remove obstacles Obstacle at Outdoor Fan Check wiring Connect wiring correctly Disconnected Wirin...

Page 174: ...an controller and outdoor PCB Fan controller Outdoor PCB transmission fault loose connector broken cable blown fuse 05 Power phase Abnormality in the power phases Incorrect power supply inverted phase connection open phase 06 Voltage Abnormal inverter voltage Outdoor voltage drop insufficient power 06 Abnormal fan controller voltage Outdoor voltage drop insufficient power 07 Cycle Drop in discharg...

Page 175: ...nsufficient refrigerant refrigerant pipes clogging expansion valve locked in open position loose connector 48 Inverter overcurrent protection device activation Overload compressor fault 51 Sensor Abnormal inverter current sensor Current sensor fault 53 Inverter Inverter error signal detection Controller IC error signal detection overcurrent low voltage and short circuit protection 54 Abnormal inve...

Page 176: ...GND Is DC12V applied between 2 and GND of CN14 CN14 is not mounted in RPK type Activation of Safety Device such as Float Switch FS or Incorrect Wiring Faulty PCB Yes No PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB Cause Check Item Action Turn OFF Main Switch Phenomenon Activation of Float Switch Check continuity when drain level is low Check drain pan High Drain Level Faulty Float Switch C...

Page 177: ...ston terminal on PCB1 220V or 240V during LED ON Yes Is the protective device still operating No continuity between 1 and 3 of PCN2 PCN16 on PCB1 Is PCN2 or PCN16 on PCB1 loosened Yes Yes Yes Check activation of the following safety devices Remove the cause after checking High Pressure Switch PSH 4 15MPa Faulty PCB1 Faulty PCB1 Restart after connecting PCN2 or PCN16 on PCB1 correctly Check Wiring ...

Page 178: ... load Reduce heat load or use a bigger unit Check for hot air near the ceiling at Heating Make good circulation Check for short circuited air at Heating Remove short circuited air Check for other heat source Remove heat source Excessively High Temp Air to Indoor Unit Heat Exchanger Clogging of Heat Exchanger Remove clogging Check for dust on air filter Remove dust Check for any obstacles at inlet ...

Page 179: ... thermistor Replace thermistor Reattach thermistor Faulty or Malfunction of Expansion Valve Check cycle operating temp and expansion valve opening Charge refrigerant correctly Overcharged Refrigerant Check ambient temp and pressure Recharge refrigerant after vacuum pumping Mixture of Non Condensable Gas in Refrigerant Cycle Check for clogging Remove clogging Clogging of Discharge Piping Check stop...

Page 180: ...isplay This alarm is indicated when an anomaly is maintained for 3 minutes after the normal transmission between indoor and outdoor units and also if the anomaly is maintained for 30 seconds after the microcomputer is automatically reset The alarm is indicated when the abnormal transmission is maintained for 30 seconds from the start up of the outdoor unit Investigate the cause of the excessive cu...

Page 181: ...econds Yes Connect terminals of 1 and 2 on TB2 Faulty PCB1 Replace fuse No Set it correctly Set it correctly Faulty PCB Faulty PCB Check the fuses of outdoor unit power supply No Check wiring between outdoor unit and indoor units or fuse EF1 for PCB No Does refrigerant system setting between DSW1 RSW1 on PCB1 and DSW5 RSW2 on PCB correspond Yes No Does Alarm occur with all indoor units Yes No Faul...

Page 182: ...ws Check terminal Nos Replacing wires repairing tightening screws and correct wiring Between Outdoor Unit and Indoor Unit Power Source Wiring for Outdoor Unit Measure resistance of coil Replace magnetic switch and fuse Faulty Solenoid Coil for Magnetic Switch for Comp Motor Measure resistance between wires and insulation resistance Replace the fan motor and fuse Failure of Outdoor Unit Fan Motor R...

Page 183: ...when fuses are blown or the circuit breakers for the outdoor unit are activated PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB PCB 1 CH Unit PCB Is LED1 red on PCB 1 ON Is LED3 green on PCB 1 ON Yes Yes To Next Page No No Check CH unit wiring Check wiring between outdoor unit and indoor units No Is LED2 yellow on PCB 1 flashing more than once in 10 seconds No Replace fuse Check other CH unit...

Page 184: ...between DSW1 on PCB1 and DSW5 on PCB correspond No Indoor Unit No Check other indoor units Set correctly No Faulty PCB Is LED3 yellow ON even if 1 and 2 on TB2 is removed Yes Yes No 1 In the case that terminating resistance DSW10 contact 1 is in the OFF when the H LINK connection is performed Set terminating resistance to ON when 1 and 2 on TB2 is removed Set terminating resistance toOFF when 1 an...

Page 185: ... motor ad fuse Faulty Solenoid Coil for Magnetic Switch for Comp Motor Measure resistance of coil Replace magnetic switch and fuse Check continuity and looseness of connection screws Replacing Wires Repairing and Tightening Screws Check terminal Nos Correctly Connect Wires Measure insulation resistance Check connections Correctly connect wires Replace it if faulty Measure PCB1 output voltage 1 Rep...

Page 186: ... Correctly Connect Wires Check connections Repair wiring connections Replace PCB if faulty Replace power fuse power transistor and diode module Replace incoming current limit resistance Between PCB1 and PCB2 Disconnected Wires Insufficient Contacting or Incorrect Connection Check continuity of wires Check for looseness of connection screws Check connection No Replacing wires repairing tightening s...

Page 187: ...Position of surge absorver Lot SP 226 1 250VAC 30A OKAYA LFB 14930 3MA E NF1 NF2 SA SA SA Surge absorver 8 Troubleshooting 181 SMGB0065 rev 1 12 2010 8 ...

Page 188: ...Cause Check Item Action Turn OFF Main Switch Phenomenon Check continuity Check for looseness of connection screws Replacing Wires Repairing and Tightening Screws Check connection Nos Correctly Connect Wires Check connections Repair wiring connections Replace PCB if faulty Replace fan controller 1 Replace power fuse power transistor and diode module Replace incoming current limit resistance Between...

Page 189: ... PCB1 is normal PCB1 is normal PCB1 is normal Voltage for unit to be suspended Running Voltage B V Starting Voltage Less than A V Abnormality with Power Source Is there any excessively voltage decrease at power source Yes Correctly connect each phase of power source Faulty PCB1 No Reverse Phase Connection Yes Check Item Power Supply A B 400V 50Hz 323 342 to 456 PCB1 Control PCB in Outdoor Unit Cau...

Page 190: ...s Check the wiring the transistor module and capacitors A 2 In case the wiring is correct replace the transistor module Yes Yes Normal Normal Fault Abnormal Loose Wiring Change of Color Frequency can increase higher than 60Hz Compressor stops immediately lower than 30Hz Compressor stops when frequency increase Approx 31Hz to 60Hz How is compressor operation Is the DC voltage over B V Be careful es...

Page 191: ... at fan controller Does LED201 on fan controller ON Restart operation Check wiring and wire sizes Connect correctly Yes Yes Yes Yes Yes Fan revolution can increase Fan stops immediately Fan stops when fan revolution is increasing How is fan motor operation No No No No No Faulty fan controller Replace it Is the power supply voltage 220V 10 or 240V 10 Is the power supply voltage more than 187V PCB1 ...

Page 192: ... or heating mode when the alarm has occurred Is the connector on indoor unit PCB for expansion valve connected properly Are the refrigerant piping and electric wiring matching Is refrigerant correctly charged Is gas leaking Yes Yes Yes Yes Yes Yes Is superheat value under 10 C Cooling Check the high pressure and compressor discharge gas temperature and calculate superheat value by outdoor unit PCB...

Page 193: ...ect Connection Check connections Replace PCB and check operation Faulty PCB Fault Replace PCB if faulty Repair wiring connections Disconnected Wires for Expansion Valve Control Check ref cycle and the electrical system Repair wiring Ref Cycle is Different from the Electrical System Check pressures Correctly charge refrigerant Overcharged Refrigerant Check expansion valve Replace expansion valve if...

Page 194: ... has occurred Is the opening of all the operating indoor units expansion valve 100 Is the amount of refrigerant correct Is gas leaking Yes Yes Yes Yes Yes Yes Cooling Check the outdoor unit PCB1 if the compressor discharge gas temperature is over 132ºC Heating Operation Cooling Operation Heating No Plug the connectors 2 of PCB1 properly No Charge correct refrigerant volume Refer to TC No Check the...

Page 195: ...looseness replace connectors or repair connections Incorrect Wiring Check connections Replace PCB and check operation Faulty PCB Fault Replace PCB if faulty Repair wiring connections Disconnected Wires for Expansion Valve Check ref cycle and the electrical system Repair wiring Ref Cycle is Different from the Electrical System Check pressures Correctly charge refrigerant Undercharge of Refrigerant ...

Page 196: ...door unit A and outdoor unit C connected to H LINK transmission terminal Is operating line between outdoor unit and outdoor unit connected INCORRECTLY Correctly connect wiring between outdoor unit and outdoor unit and reset the power supply Abnormality of PCB1 in outdoor unit A Connect operating line between outdoor unit A and outdoor unit B to O U O U transmission terminal Also reset the power su...

Page 197: ...ess setting Set DSW6 correctly for outdoor unit B and C and reset the power supply Are 4 four or more outdoor units connected to O U O U transmission terminal Correctly connect operating line between outdoor unit and outdoor unit and reset the power supply Correctly connect wiring between outdoor unit and outdoor unit and reset the power supply Is operating line between outdoor unit and outdoor un...

Page 198: ...o Yes No Is DSW6 setting for outdoor unit B and C correct DSW6 outdoor unit address setting Set DSW6 correctly for outdoor unit B and C and reset the power supply Are 4 four or more outdoor units connected to O U O U transmission terminal Correctly connect operating line between outdoor unit and outdoor unit and reset the power supply Abnormality of PCB1 in outdoor unit A Unit A Main Unit B Sub Un...

Page 199: ... Way Cassette Type PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty Intake Air Thermistor Check resistance Replace thermistor if faulty Fault Check connection Connect wiring correctly Incorrect Connection Replace PCB and check operation Replace PCB if faulty Faulty PCB 0 10 20 30 40 50 60 70 80 15 10 5 0 5 10 15 20 25 30 35 40 45 5...

Page 200: ...g or heating operation The system automatically restarts when the fault is eliminated Yes Connect it No Refer to Alarm Code 11 for thermistor resistance Faulty PCB Is the thermistor connected to THM2 of PCB Yes Faulty Thermistor No Is resistance of THM2 between 0 24kΩ and 840kΩ Thermistor for Air Outlet Temperature THM2 In Case of 4 Way Cassette Type PCB1 Control PCB in Outdoor Unit PCB Indoor Uni...

Page 201: ...uring the cooling or heating operation The system automatically restarts when the fault is eliminated Yes Connect it No Refer to Alarm Code 11 for thermistor resistance Faulty PCB Is the thermistor connected to THM3 of PCB Yes Faulty Thermistor No Is resistance of THM3 between 0 24kΩ and 840kΩ Freeze Protection Thermistor THM3 In Case of 4 Way Cassette Type PCB1 Control PCB in Outdoor Unit PCB Ind...

Page 202: ...Ω during the cooling or heating operation The system automatically restarts when the fault is eliminated Refer to Alarm Code 11 for thermistor resistance Yes Yes Connect it No Faulty Thermistor Faulty PCB No Is it connected to THM5 of PCB Is resistance of THM5 between 0 24kΩ and 840kΩ Thermistor for Heat Exchanger Gas Pipe In Case of 4 Way Cassette Type PCB1 Control PCB in Outdoor Unit PCB Indoor ...

Page 203: ...ace PCB2 No Is DC power supply for PCB2 correctly Faulty PCB2 Replace PCB2 Is the voltage between Vcc 15 and GND1 of PCB2 15V 10 Yes Is LED4 on PCB1 OFF Faulty PCB1 or transformer Replace PCB1 or transformer Insufficient voltage for PCB 1 No Is DC power supply for PCB1 correctly Faulty PCB1 or transformer Replace PCB1 or transformer Is the voltage between Vcc05 and GND of PCB1 5 5 Is the voltage b...

Page 204: ...CB 4 75 to 5 25V Is the voltage between 12V and GND of PCB 11 9 to 12 8V Use a tester 3 Is the voltage between CN550 1 and CN550 3 of PCB 280V 10 Use a tester No No Yes Yes Faulty PCB Faulty PCB Is DC power supply 15V for PCB correctly 4 Replace PCB Replace PCB 4 Is the voltage between CN550 3 and CN550 4 of PCB 14 8V to 15 8V Use a tester 5 Disconnect CN550 on PCB when performing If 2V or over ar...

Page 205: ...Replace the motor No Yes Does the indoor fan run Is fan motor hot Is continuity present at the internal thermostat of indoor fan motor Is connection bad at the connector Is the coil resistance of fan motor normal Check indoor temperature If it is unusual take suitable action to reduce it PCB1 Control PCB in Outdoor Unit Cause Check Item Action Turn OFF Main Switch Phenomenon Activation of Internal...

Page 206: ... the outdoor unit PCB1 Yes Yes Is voltage under 0 1 VDC or over 4 9VDC across 2 and 3 of the connector CN7 of the outdoor unit PCB1 Is the Check Joint Clogged Abnormality of High Pressure Sensor Connect correctly Faulty PCB1 Yes No No No No Faulty PCB1 Replace check joint Yes PCB1 Control PCB in Outdoor Unit Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty High Pressure Sensor Check ...

Page 207: ... less than 0 2 kΩ or cut greater than 500 kΩ during the operation Y es Y es Connect it No Faulty Thermistor Faulty PCB1 No Is it connected to THM7 Ta of PCB1 Is resistance of THM7 between 0 2kΩ and 500kΩ Refer to Alarm Code 11 for thermistor resistance PCB1 Control PCB in Outdoor Unit Outdoor Unit Ambient Thermistor THM7 Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty Outdoor Unit A...

Page 208: ...HM8 THM9 connected to THM8 TD1 and THM9 TD2 on PCB1 Yes Is resistance of discharge gas thermistors THM8 and THM9 same with characteristic in right figure Position of Thermistor THM8 Td1 for Inverter Drive RAS 8FSXN to RAS 12FSXN THM9 Td2 for Constant Speed Drive RAS 14FSXN to RAS 18FSXN 200 100 R25 200kΩ B 3920k 72 3 14 2 8 32 0 100 120 150 Ambient Temperature ºC Resistance of Thermistor kΩ Charac...

Page 209: ...No Faulty Thermistor Faulty PCB1 No Are thermistors connected to THM10 Te or THM17 Tchg on PCB1 Is resistance of the thermistor between 0 2kΩ and 500kΩ Refer to Alarm Code 11 for thermistor resistance If this thermistor is faulty this alarm is indicated Te Thermistor for Outdoor Liquid Pipe Tchg Thermistor for Super Cooling Main Line PCB1 Control PCB in Outdoor Unit Te Thermistor THM10 Thermistor ...

Page 210: ...his thermistor is faulty this alarm is indicated Thermistor Holder Butyl Sheet Butyl Sheet Plastic Sheet Tg Thermistor THM11 Tbg Thermistor THM23 Details for Thermistor Tbg Thermistor THM23 Tg Thermistor THM11 Yes Yes Connect it No Faulty Thermistor Faulty PCB1 No Are thermistors connected to THM11 Tg or THM23 Tbg on PCB1 Is resistance of the thermistor between 0 2kΩ and 500kΩ Refer to Alarm Code ...

Page 211: ...r circuit board PCB1 Is voltage under 0 1 VDC or over 4 9 VDC across 2 and 3 of the connector CN8 of the outdoor unit PCB1 Y es Y es Is the Check Joint clogged Abnormality with Low Pressure Sensor Connect correctly Faulty PCB1 Yes No Faulty PCB1 No No No Replace the check joint Yes PCB1 Control PCB in Outdoor Unit Cause Check Item Action Turn OFF Main Switch Phenomenon Faulty Low Pressure Sensor C...

Page 212: ...4 of DSW3 on the indoor unit PCB set incorrectly Set the capacity for PCB No Set them correctly No Outdoor Unit PCB1 DSW1 RSW1 PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB Indoor Unit PCB DSW5 RSW2 Cause Check Item Action Turn OFF Main Switch Phenomenon Check combination of indoor units and capacity setting on PCB Correctly set dip switch DSW3 Incorrect Capacity Setting of Indoor Unit Chec...

Page 213: ... anomaly is maintained for 30 seconds after the microcomputer automatically reset Is LED1 turned ON on PCB1 of outdoor unit B and C Is operating line between outdoor unit and outdoor unit loosened or disconnected No No Turn ON the power supply Replace the PCB1 of outdoor unit B or C Correctly connect the operating line between outdoor unit and outdoor unit Also reset the power supply Replace the P...

Page 214: ... unit number connected to the outdoor unit is duplicated by the DSW and RSW setting NOTE In the case of H LINK systems this alarm code is indicated when DSW1 and RSW1 of PCB1 of the outdoor unit and DSW5 and RSW2 of the PCB of the indoor unit are incorrectly set In this case set them properly after turning OFF the main power switch and turn ON again the main power switch When the setting of the re...

Page 215: ... The unit no the alarm code and the unit code are alternatively displayed in the temperature setting section and the unit no and alarm code are displayed on the outdoor unit s PCB1 display This alarm is indicated when the indoor unit connected to the outdoor unit is designed for R22 refrigerant 8 Troubleshooting 209 SMGB0065 rev 1 12 2010 8 ...

Page 216: ...en 220V or 240V in A are not detected during the stoppage of the Inverter compressor Cause Check Item Action Turn OFF Main Switch Phenomenon Abnormality of Picking up Circuit for Protection Check voltage supplied to connectors Repair wiring connections Incorrect Connection Activation of Picking up Circuit for Protection Alarm Code History 02 and 09 before 38 Refer to Alarm Code 02 and 09 Starting ...

Page 217: ...eration The constant speed compressor running current detected is 0A and retry when three minutes have passed after all the compressors are stopped and this occurs three times in a thirty minute time period Connect it correctly No No Yes Yes Yes Yes Does the CMC2 turn ON Does the constant speed compressor operate Is the running current indicated on 7 Segment of PCB1 at check mode Is the connector ...

Page 218: ...g Current of Compressor Motor Adjust voltage between each phase Excessively High Discharge Pressure Operate within 400V 10 Check for causes Overcurrent of Compressor Motor Locked up Replace compressor Failure of Compressor Bearing Looseness of Screws for Power Source Single Phase Operation Tightly fix screws Deterioration of Contact of Magnetic Switch for Compressor Replace magnetic contactor Meas...

Page 219: ... when the total capacity of the outdoor unit connected to the transmission terminal of the O U O U exceeds 54 HP Has PCB1 of outdoor unit A B or C been replaced Is the operating line between outdoor unit and outdoor unit connected correctly Abnormality of outdoor unit total capacity Set the DSW2 of the replaced PCB1 correctly Set the DSW6 of the replaced PCB1 correctly Yes Yes No No Unit A Main Un...

Page 220: ... setting of the outdoor unit connected to the transmission terminal of the O U O U is incorrect Has PCB1 of outdoor unit A B or C been replaced Is the operating line between outdoor unit and outdoor unit connected correctly Incorrect combination of outdoor units Check the outdoor unit combination again Set the DSW2 and DSW7 of the replaced PCB1 correctly Correctly connect the operating line and re...

Page 221: ...utdoor units connected to transmission terminal of the O U O U is not maintained Is LED1 turned ON on PCB1 of outdoor unit B and C Is operating line between outdoor unit and outdoor unit loosened or disconnected No No Turn ON the power supply Replace the PCB1 of outdoor unit B or C Correctly connect the operating line between outdoor unit and outdoor unit Also reset the power supply Replace the PC...

Page 222: ...gh pressure sensor or the low pressure sensor if faulty Check the compressor and power cable Check the inverter Replace the reversing valve if faulty No No No No Is there a leak in the Solenoid Valve for Hot Gas Bypass SVA Yes No Yes Replace the Solenoid Valve SVA if faulty Yes PCB1 Control PCB in Outdoor Unit Cause Check Item Action Turn OFF Main Switch Phenomenon Excessively Low Compression Rati...

Page 223: ... outdoor intake air temperature is too high Replace the low pressure sensor if faulty Replace the solenoid valve SVA if faulty No No Yes Yes Is the reversing valve spindle mounted at middle position Replace the reversing valve if faulty No Yes PCB1 Control PCB in Outdoor Unit Cause Check Item Action Turn OFF Main Switch Phenomenon Excessively Low Suction Pressure Check outlet pipe temp of solenoid...

Page 224: ...ween the indoor and outdoor unit incorrectly connected Is the outdoor unit stop valve closed No No Yes Yes Correctly connect it Check the outdoor electronic expansion valve during cooling and the indoor electronic expansion valve during heating Yes PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB NOTE In the case of H LINK system check the refrigerant system setting of the outdoor PCB1 and ind...

Page 225: ...em check the refrigerant system setting of the outdoor PCB1 and indoor PCB PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB Cause Check Item Action Turn OFF Main Switch Phenomenon Check for conduction after temperature of outdoor fan motor is decreased Faulty Internal Thermostat Replace outdoor fan motor Fault Measure resistance by tester Remove looseness and replace connector Incorrect Contac...

Page 226: ...No Smaller than activation current Yes Transistor Module is normal Is discharge pressure high Check pressure and refrigeration cycle Is the compressor current larger than activation current 1 Check the inverter circuit board PCB2 connection 3 Normal 2 4 Check for clogging of the heat exchanger Check the fan motor Replace the diode module Abnormal Abnormal Connect it correctly Transistor Module IPM...

Page 227: ...er source capacity Is there any cause of instantaneous voltage drop It trips occasionally It trips after a certain period Turn off power and disconnect U V W from compressor terminals Turn ON 1 of DSW1 on PCB2 and restart Does it trip Check the compressor Replace the diode module Replace PCB2 Replace PCB2 Replace the transistor module Check the power supply Yes Input currents nearly equal 3 Yes Ye...

Page 228: ...one of the absolute running current values detected by the current transformer in each phase U U V and V is equal or less than 1 5 A l Is output of PCB2 correct 2 l Or is output of voltage between U and V V and W W and U correct Replace Comp Restart operation Abnormal Faulty PCB2 and replace PCB2 2 Compressor stops immediately nearly 18Hz Compressor is not operated P17 is appeared 1 How is compres...

Page 229: ...fan motor Yes Yes Is the silicon grease coated all over between the transistor module and the radiated fin Is the fixed screw on the transistor module loose No No No Coat the silicon grease to all the touched face between the transistor module and the radiated fin fully Fix the screw correctly 4 Check the PCB2 Check the compressor Normal Normal Replace the PCB2 and the transistor module Failure of...

Page 230: ... ensure the surge absorver SA in the noise filter NF1 NF2 The surge absorver may be damaged if the inner surface in the SA is black If so replace surge absorver If the inside of the surge absorver is normal turn OFF the power supply and wait for LED201 red of PCB2 OFF approximately 5 minutes and turn ON power supply again Positioning of the surge absorver Lot SP 226 1 250VAC 30A OKAYA LFB 14930 3M...

Page 231: ...up to second time the anomaly occurs Activation condition this alarm operation is indicated when the Inverter fin thermistor temperature for the transistor module is greater than 90 C Restart operation Does it trip soon Is the heat exchanger of outdoor unit clogged No Replace the PCB2 1 Remove clogging Yes Yes No Check the thermistor Normal Faulty Replace the thermistor Replace the PCB2 1 Check th...

Page 232: ...wer LED201 OFF and restart operation Is alarm code 55 indicated again No PCB2 is normal Check the noise filter 1 Replace the PCB2 No PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB 1 When the unit is applied the excessive surge current due to lightning or other causes alarm code 55 or Inverter stoppage code IT 11 is indicated and the unit cannot be operated In this case check to ensure the surg...

Page 233: ...nger of outdoor unit clogged Replace the fan controller Remove the clogging or replace the heat exchanger Check the fan motor Yes it trips Turn OFF the power supply Disconnect the faston terminal U V W and turn ON the DSW1 1 of fan controller And then restart the operation Does it trip No NOTE When the unit is applied the excessive current due to lightning or other causes alarm code 57 or Inverter...

Page 234: ...nine times Activation condition this alarm is indicated when the thermistor temperature inside the transistor module increases over 100 C PCB1 Control PCB in Outdoor Unit Y es No Is the heat exchanger of outdoor unit clogged Failure of fan controller Replace the fan controller Remove clogging Yes Yes Is the silicon grease coated all over between the transistor module and the radiated fin No Coat t...

Page 235: ...termittently and the accumulated time reaches to three minutes in a ten minute period PCB1 Control PCB in Outdoor Unit Is the cause of stoppage of troubleshooting by 7 segments display 2 or 4 Refer to next page Cause of fan controller overload Restart operation No Smaller than activation current Yes Fan controller is normal Does the fan stop by the foreign matter Is fan rotated reversely due to co...

Page 236: ...es Yes It trips No No No No No It trips immediately Check the fan motor Check the fan motor Is there any cause of instantaneous voltage decrease It trips occasionally It trips after a certain period Turn off power and disconnect U V W from fan controller terminals Turn ON 1 of DSW1 on PCB2 and restart Does it trip Replace the fan controller Replace the fan controller Yes Yes Yes No No No Check the...

Page 237: ...s not increase over 4 A Check the fan motor Restart operation Abnormal Faulty fan controller and replace fan controller 1 Faulty fan controller and replace fan controller 1 Fan motor stops immediately Fan motor is not operated How is fan motor operation when restarted Is the fan motor coil normal Normal l 1 Carry out the electrical discharge when fan controller is checked or replaced refer to Chec...

Page 238: ...n of running current in constant speed compressor 43 Activation of the low compression ratio protection device 44 Activation of the low pressure increase protection device 45 Activation of the high pressure increase protection device 47 Activation of the low pressure decrease protection device Vacuum operation protection These alarms can be checked using check mode 1 Follow the actions indicated i...

Page 239: ...This alarm is indicated under the following conditions Turn OFF the power supply and check the settings of the DSW and RSW Conditions Action Unit number DSW6 and RSW1 or refrigerant cycle number DSW5 and RSW2 are set above 64 Or more than two contacts are set in DSW5 and DSW6 Set the unit number and refrigerant cycle number below 63 Unit number and refrigerant cycle number are set from 16 to 63 an...

Page 240: ...ode are displayed on the outdoor unit s PCB1 display 35 is displayed on the remote control switch screen This alarm is indicated under the following conditions Turn OFF the power supply and check the settings of DSW and RSW Conditions More than 17 indoor units not belonging to FSN2 series H LINK are connected to one system Countermeasures The indoor units not belonging to FSN2 series H LINK must b...

Page 241: ...3 pipes This alarm is indicated when two or more CH units are connected between the outdoor unit and the indoor unit No Yes Is wiring connection for CH unit incorrect Correctly connect the wiring and reset the power supply Failure of PCB 1 in CH unit PCB1 Control PCB in Outdoor Unit PCB 1 CH Unit PCB Alarm code C1 will be indicated when the units are connected as follows Alarm Code C1 will be indi...

Page 242: ...nine or more indoor units are connected to the CH unit No Yes Are 9 or more indoor units connected to CH unit Correctly connect the wiring and reset the power supply Failure of PCB 1 in CH unit PCB1 Control PCB in Outdoor Unit PCB 1 CH Unit PCB Alarm code C2 will be indicated when the units are connected as follows Outdoor Unit Ref Cycle Group 1 CH Unit Indoor Unit 1 Ref Cycle Group 1 Indoor Unit ...

Page 243: ...rant cycle group setting for indoor unit connected to CH unit incorrect Correctly connect the wiring and reset the power supply Set refrigerant cycle group RSW2 DSW5 correctly and reset the power supply Failure of PCB 1 in CH unit PCB1 Control PCB in Outdoor Unit PCB 1 CH Unit PCB Alarm code C3 will be indicated when the units are connected as follows Refrigerant Cycle Group is different Alarm Cod...

Page 244: ... CHECK COOL HIGH A C CHECK COOL HIGH A C CHECK COOL HIGH VENTI A C CHECK COOL HIGH A C ADDS RN CHECK CHECK After 7 seconds See A To View the Next Indication TEMP Press TEMP Press Check Mode 1 Current data will be displayed Check Mode 2 Data held immediately before failure will be displayed Check Mode PC ART Use the remote control CHECK switch in the following cases 3 Normal Mode NOTES Indication w...

Page 245: ...C Indoor Unit Intake Air Temp at Thermistor ºC 2 Indoor Unit Discharge Air Temp at Thermistor ºC 3 Indoor Unit Heat Exchanger Liquid Pipe Temp ºC 4 Temperature at Remote Sensor ºC 5 Outdoor Unit Ambient Air Temp ºC 6 Indoor Unit Heat Exchanger Gas Pipe Temp ºC 7 Outdoor Unit Evaporating Temp during Heating ºC 8 Control Information 9 Discharge Gas Temp at the Top of Comp Chamber ºC 10 See Self Chec...

Page 246: ...ouver Sensor 19 Micro Computer Input Output in Indoor Unit 12 Heating Thermo ON Cooling Thermo ON Dark Alarm H2 52H to next page Countable up to 99 Over 99 times 99 is always indicated NOTE 1 NOTE 1 next page If a transmitting error continues for 3 minutes one is added to the occurrence times Indication of Unit Stoppage Cause Abnormality Occurrence Counter Indication of Automatic Louver Condition ...

Page 247: ...to a decrease in voltage another retry due to the Inverter 19 Expansion valve opening change protection 21 Thermo OFF due to oil return control 22 Hot start of the outdoor unit 26 Retry due to a decrease of high pressure 28 Cold draft control 30 Thermo OFF due to compressor forced stop 32 Retry due to a excessive outdoor unit number NOTE 2 Explanation of the term Thermo ON condition by which an in...

Page 248: ...lve MV2 the same figure is indicated This is an indication for internal information for the remote control switch This does not have any specific meaning This is an indication for frequency of Inverter The capacity of the indoor unit is indicated as shown in the table below n Indoor Unit Capacity Indication Outdoor Unit Expansion Valve MV1 Opening 29 Outdoor Unit Expansion Valve MV2 Opening 30 Out...

Page 249: ...mp ºC 4 Indoor Heat Exchanger Gas Pipe Temp ºC 5 Evaporating Temp at Heating ºC 6 Control Information 7 Discharge Gas Temp at the Top of Comp Chamber ºC 8 See Self Checking of PCBs using Remote Control Switch NOTE 1 NOTE 2 During transient period such as starting time etc may be indicated for a limited time All the data during the check mode 2 will be changed to 00 if a power failure occurs during...

Page 250: ...dication for internal information for the remote control switch This does not have any specific meaning This is an indication for frequency of inverter Outdoor Unit Expansion Valve MV1 Opening 14 Indoor Unit Expansion Valve Opening 13 Expansion Opening Indication Compressor Running Current A 15 Estimated Electric Current Indication Temperature Indication Returns to Temperature Indication n 8 Troub...

Page 251: ...segment display are located on PCB1 PCB1 211 20CHG 52C1 Fan SEG1 CH2 20F2 20A2 52C2 CH1 20A1 20B 20C 20F1 X2 X1 212 SEG2 PSW5 PSW1 PSW4 PSW2 PSW3 7 Segment Display 3 Protection control code on the 7 segment display A protection control code is displayed on the 7 segment display during the operation when the protection control has been activated A protection control code is displayed while the func...

Page 252: ...1 Pressure ratio decrease retry Without P 1 2 Low pressure increase retry P 1 3 High pressure increase retry P 1 4 Constant speed compressor overcurrent retry P 1 5 Discharge gas temperature increase retry Low pressure decrease retry P 1 6 Discharge gas super heat decrease retry P 1 7 Inverter anomaly retry P 1 8 Abnormal Inverter voltage retry Inverter failure retry P 2 6 High pressure decrease r...

Page 253: ...ent protection Inverter output current a A a 400 V 22 5 P04 Inverter fin temperature increase protection Inverter fin temperature 80 C P05 Discharge gas temperature increase protection Temperature of the upper part of the compressor Td 112 C P06 Low pressure decrease protection Suction pressure Ps 0 1 MPa P09 High pressure decrease protection Discharge pressure Pd 1 0 MPa P0A Demand current protec...

Page 254: ...rease retry Discharge gas superheat Tc 10 C more than 30 minutes Tc Saturation temperature When activating three times in one hundred and twenty minutes alarm code 07 is indicated P17 Inverter anomaly retry Instantaneous overcurrent When activating six times in thirty minutes alarm code 48 is indicated Abnormal current sensor When activating three times in thirty minutes alarm code 51 is indicated...

Page 255: ... No is indicated on the 7 segment display as follows Indication Example Unit A No 1 Details of External Input Output Setting is shown in item 4 2 And Function Setting is shown in item 4 3 Press PSW1 more than 3 seconds Menu will be indicated PSW1 PSW2 PSW3 PSW5 PSW4 PSW pushswitch on PCB1 PSW1 enter PSW2 3 4 and 5 for checking To cancel the check method Press PSW1 for more than three seconds while...

Page 256: ...er by pressing PSW4 or PSW2 Unit Indication Unit A No 1 od00 Unit B No 2 od02 Unit C No 3 od03 Press PSW3 for detailed information Press PSW4 to move forward or PSW2 to go back This information will be indicated alternating as Item Details Press PSW5 to return to the outdoor unit combination number selection Indication details Item 7 segment display Details SEG2 SEG1 1 Capacity of the outdoor unit...

Page 257: ...n 127 Thermistor short circuit indication 127 14 Gas temperature in the outdoor unit heat exchanger G 0 Unit C Thermistor open circuit indication 127 Thermistor short circuit indication 127 15 Super cooling temperature C H0 Unit C Thermistor open circuit indication 127 Thermistor short circuit indication 127 16 Super cooling temperature in the bypass b G0 Unit C Thermistor open circuit indication ...

Page 258: ...t No is indicated on the one digit of SEG1 3 Cause of the Inverter stoppage display digits indication 10 1 compressor No 0 outdoor unit No 4 Cause for fan controller stoppage display digits indication F 10 1 fan controller No 0 outdoor unit No Capacity table for the outdoor units Indication Capacity kW Horsepower HP 64 22 4 8 0 80 28 0 10 0 96 33 5 12 0 112 40 0 14 0 128 45 0 16 0 144 50 0 18 0 NO...

Page 259: ...changer gas pipe temperature G 00 Unit C 5 Air inlet temperature 00 Unit C 6 Air outlet temperature o 00 Unit C 7 Unit stoppage cause code d1 00 Indoor unit stoppage cause code indication Refer to the Indoor unit stoppage cause table NOTE The indoor unit No is indicated on SEG1 SEG2 SEG1 Example Capacity table for the indoor units Indication Capacity kW Horsepower HP Indication Capacity kW Horsepo...

Page 260: ...ol is not activated 1 degeneracy control is activated 6 Degeneracy control for Td SH decrease protection c 16 0 degeneracy control is not activated 1 degeneracy control is activated 7 Degeneracy control for overcurrent protection c 17 0 degeneracy control is not activated 1 degeneracy control is activated F Alarm code history information This information is indicated in unit A main unit only If a ...

Page 261: ...e exists in SEG2 F 12 The fan controller stoppage cause code is indicated when the FT code exists in SEG2 C 0 Stoppage cause of the constant speed compressor abnormal current is 0 A stoppage C FF Overcurrent stoppage of the constant speed compressor With the exception of the above 7 Running current of compressor Inverter primary current The Inverter primary current is estimated from the running cu...

Page 262: ...3 Abnormal power source phase 16 Inverter failure 21 Abnormal start up Cause for fan controller stoppage Check the item F Code Cause 1 Driver IC error 2 Instantaneous overcurrent 3 Abnormal Inverter fin temperature 4 Inverter overcurrent 5 Decrease in fan controller voltage 6 Increase in fan controller voltage 7 Abnormal fan controller transmission 8 Abnormal current sensor 9 Instantaneous power f...

Page 263: ...or units 2 Processing for sensor input 3 Processing for dip switch input 4 Operation control for parts 1 to 3 Compressor operating control control of the bypass valve fan control and overcurrent control 5 7 segment display indication 6 Processing of the safety device input 7 Processing of the relay output 8 Detection of reverse phase for power source PCB2 For Inverter 1 Inverter power part is driv...

Page 264: ...y must be disconnected Otherwise the new setting will not be valid NOTE While the power remains on the switches are disabled and the settings carried out are not valid However switch DSW4 contacts 1 2 and 4 and the pushbuttons can be used with the power supply turned on Mark indicates the position of the DIP switches The figures show the position of the DIP switch once the position setting has bee...

Page 265: ...ted or not activated LED3 Yellow LED3 indicates the transmission status between the indoor and outdoor units Normal condition flashing Abnormal condition activated or not activated LED4 orange LED4 indicates the transmission status between outdoor units Normal condition flashing Abnormal condition activated or not activated LED5 Red PCB1 power indication High voltage Normal condition activated Abn...

Page 266: ...t to the ON position the electrical current detection is cancelled Contact number 1 must be set to the OFF position after the electrical work is carried out c Fan controller Part name Contents of functions LED501 Red Fan controller power indication Normal condition activated Abnormal condition not activated LED202 Yellow Microcomputer status indication Normal condition activated Abnormal condition...

Page 267: ... LED6 Green MVS2 Fully opened 480 pulse Turn ON Fully closed 0 pulse Turn OFF LED7 Green MVS1 Fully opened 600 pulse Turn ON Fully closed 0 pulse Turn OFF 2 When alarming the alarm code is indicated by LED LED Alarm code Contents 4 5 6 7 O O X X 03 Abnormal transmission between CH unit and outdoor unit X X O O 03 Abnormal transmission between CH unit and indoor unit O O O O C1 2 or more CH units a...

Page 268: ... After 1 Second After 1 Second to next page Contents Abnormality 2 Heat Exchanger Evaporation Temp Thermistor Low Pressure Sensor Comp Discharge Gas Temp Thermistor High Pressure Sensor Transmission of Inverter Phase Detection Protection Signal Detection Circuit PSH Input Failure ITO Input Failure Transmission of Outdoor Unit This Checking Operation Transmission of Indoor Unit during Zero Cross In...

Page 269: ...the power supply Once the check has been carried out turn OFF the electrical power supply and return the connectors to the way they were before the check TEMP Press ex Indication of Unit No 2 CHECK Press RESET ADDS RN Result After 1 Second After 1 to 5 Seconds After 7 Seconds from previous page Repetition of Self checking of Unit No 1 In case that there is a second unit Self checking Indication of...

Page 270: ...e the check of the following PCB parts is not available Indoor unit PCB relay circuit DSW switches option circuit fan circuit protection circuit Outdoor unit PCB relay circuit DSW switches option circuit 3 In the case this troubleshooting procedure is carried out in the system using the central station the indication on the central station may change during this procedure However this is not abnor...

Page 271: ...smission 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 2 or more switches simultaneously is invalid and not counted 2 Unless all the switches are depressed the checki...

Page 272: ...N 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 automatically stopped after the automatic op...

Page 273: ...it Be careful not to short circuit between terminals P and N d Wait 2 or 3 minutes and measure the voltage once again Make sure no voltage is present Solder Bit Connecting Wires Plug Transistor Module IPM 2 Method for checking the transistor module IPM External appearance and internal circuit of transistor module Drive Circuit Over Heating Protection Circuit Sensor B N P U U W Drive Circuit Drive ...

Page 274: ...le It is normal for all the resistances to be between 1 and 5 kΩ d Resistance is measured when the side of the multimeter touches terminal N of the transistor module and the side of the multimeter touches terminals U V and W of the transistor module It is normal for all the resistances to be greater than 100 kΩ 3 Method for checking the diodes module DM External appearance and internal circuit of ...

Page 275: ...hod for checking the capacitor a Check that the screws are tightly fastened b Check that the capacitor is not blackened or bulging out When checking the capacitor disconnect the B terminals Do not disconnect the A terminals Capacitance 400 V For Inverter 4700 µF For the fan controller 2700 µF 5 Method for checking the resistor Measure both ends of the resistor as shown in the figure It is normal f...

Page 276: ... the temperature of the liquid pipe during the heating operation If the temperature does not increase this is abnormal It is not abnormal if the pressure of the liquid pipe does not increase during the cooling operation Locked with slightly open It is abnormal under the following conditions The temperature of the freeze protection thermistor is lower than the temperature of the suction air when th...

Page 277: ...802AH 1200 W U Red V White W Black White black Black red Red white 0 794 5 at 20 C Part names Model Resistance Ω Solenoid valve for gas bypass SR10PA 1250 at 20 C Reversing valve Coil STF 01AJ502D1 Body STF 0401G 8 12 HP STF 0712G 14 18 HP 1130 at 20 C Compressor motor for Inverter compressor E656DHD 0 839 at 75 C Compressor motor for constant compressor E655DH 2907 at 75 C Compressor motor for co...

Page 278: ...supply cables U and V correctly inserted in the current sensor Check to ensure that the cables are properly inserted 8 Are expansion valves MV1 and MVB properly connected Check to ensure that MV1 to CN10 and MVB to CN12 connections are correct 9 Are expansion valve MV1 and MVB coils properly installed Check to ensure that each coil is properly installed in the valve 10 Are the refrigeration cycle ...

Page 279: ... insulation failures 8 and 9 During the cooling operation Pd is controlled by the fan revolution of the indoor unit and Td and SH are controlled by MV for each of the indoor units During the heating operation Td and SH are controlled by MV1 If the expansion valves are improperly connected proper control is not available resulting in compressor seizure depending on the liquid refrigerant return con...

Page 280: ... components for outdoor units 280 9 2 1 Refrigerant cycle components for RAS 8 12 FSXN 280 9 2 2 Refrigerant cycle components for RAS 14 18 FSXN 283 9 3 Electrical parts for outdoor units 286 9 3 1 Electrical box components for RAS 8 18 FSXN 286 9 3 2 Sub electrical box components for RAS 14 18 FSXN 288 9 4 Refrigerant cycle and electrical parts for CH units 289 9 Spare parts 275 SMGB0065 rev 1 12...

Page 281: ... 9 1 1 Cabinet and fan components for RAS 8 12 FSXN 27 27 27 1 3 2 27 27 27 4 5 6 7 8 27 27 9 27 10 11 12 27 13 27 14 27 24 21 15 16 17 18 19 20 20 23 22 24 27 27 28 26 25 27 27 Spare part document SPN 201002E 9 Spare parts 276 SMGB0065 rev 1 12 2010 ...

Page 282: ...9 Electrical box cover 10 Upper stay 11 Valve cover 1 12 Valve cover 2 13 Piping cover 14 Protection net 15 Motor clamp 16 Fan motor MOF1 17 Screw SUS M6 for the fan motor 18 Propeller fan ø644 19 Washer SUS 20 Closing nut SUS M10 21 Upper cover 22 Screw SUS M4 23 Air grille 24 Screw SUS M5 25 Front cover 26 Service cover 27 Screw SUS M5 28 HITACHI label 9 Spare parts 277 SMGB0065 rev 1 12 2010 9 ...

Page 283: ...net and fan components for RAS 14 18 FSXN 27 27 27 1 3 2 27 27 27 4 5 6 7 8 27 27 9 10 11 12 13 14 27 21 15 16 17 18 19 20 23 22 24 28 26 25 27 29 27 24 27 27 27 27 30 30 9 Spare parts 278 SMGB0065 rev 1 12 2010 ...

Page 284: ...y 11 Valve cover 1 12 Valve cover 2 13 Piping cover 14 Protection net 15 Motor clamp 16 Fan motor MOF1 17 Screw SUS M5 for the fan motor 18 Propeller fan ø644 19 Washer SUS 20 Closing nut SUS M10 21 Upper cover 22 Screw SUS M4 23 Air grille 24 Screw SUS M5 25 Front cover 26 Service cover 27 Screw SUS M5 28 HITACHI label 29 Sub electrical box cover 30 Screw For the sub electrical box cover 9 Spare ...

Page 285: ... 10 2 10 1 10 4 28 12 28 7 13 8 8 1 19 6 21 1 4 3 4 3 4 3 2 2 5 18 28 26 20 28 11 6 11 2 11 22 11 8 11 7 11 5 11 1 11 4 11 3 12 3 12 14 12 16 12 12 12 13 27 10 3 10 3 12 11 27 12 11 12 12 12 13 12 5 12 4 12 1 12 2 26 12 7 16 17 12 8 12 6 12 11 12 10 12 9 27 10 5 28 9 12 15 20 Spare part document SPN 201002E 9 Spare parts 280 SMGB0065 rev 1 12 2010 ...

Page 286: ...coil MVB Saginomiya UKV A035 11 5 Stop valve liquid 3 8 11 6 Plate stay 11 7 Plate stopper 11 8 Rubber sheet 12 Reversing valve assembly 12 1 Reversing valve RVR1 2 Saginomiya STF 0401G 12 2 Reversing valve coil RVR1 2 Saginomiya STF 01AJ502D1 12 3 Stop valve gas 7 8 12 4 Valve stay 12 5 Screw SUS M5 12 6 Strainer 12 7 Check joint 12 8 Check joint 12 9 Solenoid valve SVA Nichiden Kougyou SR10P 12 ...

Page 287: ...changer 16 High pressure sensor PD Saginomiya NSK BD050F 102 17 Low pressure sensor PS Saginomiya NSK BD020F 102 18 RC cover 19 Sound proof cover 20 Thermistor THM17 11 10 For piping Tchg Tg Te 21 Thermistor THM8 For compressor Td1 22 Thermistor THM23 For piping TBg 23 Accessory pipe 24 Accessory pipe 25 Accessory pipe 26 Screw SUS M6 27 Screw For coil 28 Screw SUS M5 9 Spare parts 282 SMGB0065 re...

Page 288: ...15 17 15 16 15 15 15 1 15 2 15 14 15 15 12 35 15 10 15 9 34 15 18 15 11 15 12 15 13 15 12 15 13 15 5 15 11 34 15 4 29 33 27 15 15 3 15 7 22 23 15 8 15 6 35 35 33 14 14 1 14 2 14 7 14 4 14 5 27 14 6 14 3 14 9 14 8 9 2 3 6 5 7 6 5 7 6 5 4 7 4 4 4 26 24 25 11 11 1 Only for RAS 18FSXN Only for RAS 18FSXN Only for RAS 18FSXN Inv Constant 9 Spare parts 283 SMGB0065 rev 1 12 2010 9 ...

Page 289: ...miya ACB 1UB34 13 4 Oil separator stay 13 5 Saddle 14 L pipe assembly 14 1 Double tube assembly 14 2 Double tube 14 3 Strainer 14 4 Expansion valve MVB Saginomiya UKV 25D26 14 5 Expansion valve coil MVB Saginomiya UKV A035 14 6 Stop valve liquid 1 2 14 7 Plate stay 14 8 Stop stopper 14 9 Rubber sheet 15 Reversing valve assembly 15 1 Reversing valve RVR1 2 Saginomiya STF 0712 G 15 2 Reversion valve...

Page 290: ...sion valve assembly 19 1 Strainer 19 2 Expansion valve MV1 Saginomiya VKV 40D51 19 3 Expansion valve coil MV1 Saginomiya EKV MOZS225B0 20 Heat exchanger For RAS 14 16 FSXN 21 Heat exchanger For RAS 18FSXN 22 High pressure sensor PD Saginomiya NSK BD050F 102 23 Low pressure sensor PS Saginomiya NSK BD020F 102 24 RC cover 25 RC cover 26 Sound proof cover 27 Thermistor THM17 11 10 For piping Tchg Tg ...

Page 291: ...1 32 16 12 12 11 A 4x10 A 4x10 A 4x10 A 4x10 A 4x10 B 4x10 H 4 J 4 B 4x10 H 4 J 4 B 3x10 H 3 J 3 B 5x16 H 5 J 5 B 4x16 H 4 J 4 B 4x8 H 4 J 4 26 10 25 35 17 27 18 36 37 15 7 4 32 30 28 28 6 30 8 6 13 14 A B C D E F G H J K Truss Head Tapping Screw Round Head Screw Flat Head Screw Pan Head Tapping Screw Hexagon Head Bolt Stud Bolt Nut Washer Spring Lock Washer Toothed Lock Washer 9 Spare parts 286 S...

Page 292: ... 2 20SHT500JA187 13 Resistor R1 40SH 6 3 kΩ 14 Resistor R1 40SH 10 5 kΩ 15 Reactor DCL2 3 0 mH 10 A for the fan 16 Reactor DCL1 1 0 mH 10 A for the inverter 17 Diode module DM DF50AA160 18 Transistor module IPM 6MBP50RA120 55 19 PCB for the inverter PCB2 PV093 20 Collar 21 Collar 22 Bushing 23 Spacer 24 Spacer 25 Radiation fin 1 26 Radiation fin 2 27 Thermistor THM For the inverter fin 28 Capacito...

Page 293: ...lat Head Screw Pan Head Tapping Screw Hexagon Head Bolt Stud Bolt Nut Washer Spring Lock Washer Toothed Lock Washer Part No Description Remarks 1 Sub electrical box 2 Terminal board 3 Fuse holder EF3 4 4 Fuse EF3 4 for the constant speed compressor 5 Magnetic switch CMC2 Fuji Electric FC 2S 6 Current sensor CT2 9 Spare parts 288 SMGB0065 rev 1 12 2010 ...

Page 294: ...pping Screw Hexagon Head Bolt Stud Bolt Nut Washer Spring Lock Washer Toothed Lock Washer Spare part document SPN 201002E Part No Description Remarks 1 Printed circuit board PCB1 2 Terminal board TB1 600 V 30 A 3 Expansion valve coil MVD1 S1 Fuji Kouki HAM MD12HS 2 4 Expansion valve coil MVD2 S2 Fuji Kouki CAM MD12HS 9 9 Spare parts 289 SMGB0065 rev 1 12 2010 9 ...

Page 295: ...eplacing the return oil circuit 311 10 11 Removing the coils 312 10 11 1 Removing the expansion valve coil MV1 MVB 313 10 11 2 Removing the solenoid valve coil SVA SVG 314 10 11 3 Removing the solenoid valve 314 10 11 4 Removing the reversing valve coil RVR1 RVR2 315 10 11 5 Removing the reversing valve 315 10 12 Removing the stop valve 317 10 13 Removing the high pressure switch high pressure sen...

Page 296: ...rting at the bottom of the front cover B b Hold the front cover B at the top and lift it upwards Remove the right and left hooks that secure the front cover B and extract the cover forward NOTE 1 When fitting and removing the front cover take care not to get injured with the edges of the cover 2 When securing the front cover A insert the hook C firmly in the lower part of the square hole D of the ...

Page 297: ...llowing tool Phillips screw driver 1 Remove the screws A that attach the upper cover B RAS 8 12 FSXN 6 screws RAS 14 18 FSXN 10 screws 2 Lift the upper cover upward Take care with the propeller fan when removing the upper cover RAS 8 12 FSXN RAS 14 18 FSXN A B A B 10 Servicing 293 SMGB0065 rev 1 12 2010 10 ...

Page 298: ...ving the electrical box cover 10 3 2 Removing the electrical box cover for RAS 14 18 FSXN 1 Remove the front service cover as described in the procedure Removing the front service cover see on page 292 2 Remove the two screws of the electrical box cover B and loosen the two fixing screws for fall prevention E 3 Lift the electrical box cover A and remove it forward from the screws D 4 Remove the tw...

Page 299: ...the electrical box D and remove it forward from the screw C 10 4 2 Removing the electrical box for RAS 14 18 FSXN 1 Remove the front service cover as described in the procedure Removing the front service cover see on page 292 2 Remove the electrical box cover as described in the procedure Removing the electrical box cover for RAS 14 18 FSXN see on page 294 3 Remove the screws that fix the wiring o...

Page 300: ... Remove the right and left hooks that fix the electrical box stay in the direction of the arrow 10 5 2 Removing the electrical box stay for RAS 14 18 FSXN 1 Remove the electrical box as described in the procedure Removing the electrical box for RAS 14 18 FSXN see on page 295 2 Remove the four fixing screws C on the fan cover D 3 Lift the fan cover D forward and remove it 4 Remove the four fixing s...

Page 301: ...cing use the following tool Phillips screw driver 1 Remove the four fixing screws A of the air grille B 2 Remove the air grille B NOTE Do not apply too much force to the shroud plastic part C to avoid breaking or deforming it D Upper cover A B C D 10 Servicing 297 SMGB0065 rev 1 12 2010 10 ...

Page 302: ...r grille see on page 297 Fan motor position A DC fan motor 2 Remove the closing nut A and the flat washer B that fix the propeller fan C to the motor shaft using a box wrench Remove the propeller fan C from the motor shaft If the fan is difficult to remove as the fan is tightly fixed to the motor shaft use a puller NOTE Do not apply too much force to the shroud plastic part D to avoid breaking or ...

Page 303: ... end of the motor wire F must be downward facing when assembling the motor G b Fix the motor wire F in the motor clamp using a wire tie to avoid contact with the propeller fan c When assembling the propeller fan position it and push it so it matchs with the mark with the cut out part of the motor shaft Fix the propeller fan with a torque of 30 Nm after the upper end of the fan shaft comes up Tight...

Page 304: ...refrigerant pipe 1 Remove the front service cover as described in the procedure Removing the front service cover see on page 292 In case that the outdoor unit is installed closely to the wall remove the refrigerant piping and move the outdoor unit away from the wall 2 Unfasten the tack C of the sound proof cover of the compressor and remove the sound proof cover A 3 Remove the rubber cap H and the...

Page 305: ...nd the cover The welding could be damaged by the deformation of the pipe When removing the compressor take care not to be injured with the edge of the metal sheet or the fins of the heat exchanger The aluminium sheet is a conductor If the aluminium sheet is damaged it may cause a failure due to an electric contact with the wiring To avoid this failure check the conditions of the RC cover when fixi...

Page 306: ...due to reverse rotation NOTE When installing the compressor check the terminal rings F are in perfect condition If they are not replace them Fasten the electrical wire with wire ties G Tighten the bolts when fitting the compressor 9 Unfasten the spring A to remove the crankcase heater B 10 Disconnect the suction A and discharge pipes C Check that the piping pressure is the same that in the atmosph...

Page 307: ... directly to the welding part the refrigerant oil spilt may be flammable Make sure that you comply with the safety measures necessary to carry out the procedure Do not throw out the collected oil by the oil pan B This quantity of oil must be measured 12 Remove the three compressor nuts A and remove the compressor B NOTE When removing the compressor take care not to touch the surrounding pipes as i...

Page 308: ...ompressor Initial charge of refrigerant oil For inverter E656DHD 1100 cc For constant speed E655DH 500 cc For constant speed E855DH 1100 cc 200 cc This value is considered not to be removed from the chamber If the refrigerant oil is contaminated exchange all of them with the new refrigerant oil 14 Fit the new compressor When attaching the nut on the front side take care not to deform the discharge...

Page 309: ...wined in the spring C of the crankcase heater A as this may cut the cables due to vibration 16 Fit the RC cover A to the compressor 17 Reconnect all wires in the original positions a The power supply wiring of the crankcase heater C is fixed inside the RC cover with a tack I without touching with the power supply line of the compressor B and the piping b Draw the wire for the high pressure switch ...

Page 310: ...A and the upper sound proof cover K L L M A K NOTE Make sure that the wiring of the Td thermistor pull out from the RC cover A through the dent part L Make sure that the wiring of the pressure switch PSH pull out from the RC cover A through the dent part M 18 Carry out the final check for the wiring conditions referring to the drawing below CAUTION Make sure that all wires do not contact with the ...

Page 311: ...to Prevent Compressor and Piping from Contacting Cover Outside of Discharge Oil Pipe When Winding RC Cover Pull out Power Line for Constant Speed Comp and Crankcase Heater Lead Line from Upper Side of Bind Lace 20 Tack W Remove Power Line and Crankcase Heater Lead Line from Dent Part of RC Cover Do NOT Contact Wiring with Piping Fix Power Line for Compressor and Crankcase Heater Lead Line Together...

Page 312: ...ith nitrogen 0 15MPa from the low pressure check joint E and collect the refrigerant oil in the accumulator by applying pressure for approximately 20 minutes NOTE Make sure that the pressure of the high pressure check joint A is not abnormal when the nitrogen is charged 6 Stop charging with nitrogen after the refrigerant oil is completely collected Perform vacuuming from the low pressure check joi...

Page 313: ...essure check joint F Make sure that the pressure will not increase at this time NOTE If the pressure increases collect all the refrigerant in the refrigerant circuit 5 Remove the flare nut that connects with the return oil circuit and the outlet port of the oil separator J Also remove the flare nut I from the upper part of the return oil circuit and connect the charge hose to the flare nut for the...

Page 314: ...e refer to step 6 before to know the quantity of refrigerant oil collected 8 When the procedure is complete perform the vacuuming again from the low pressure check joint E and recharge the refrigerant After recharging open the stop valves NOTE Use a clean charge hose Charge the refrigerant oil in a short period of time approximately 20 minutes Use a container with a small opening so the refrigeran...

Page 315: ...it refrigerant from the low pressure check joint D and the high pressure check joint E Make sure that the pressure will not increase at this time NOTE If the pressure increases collect all the refrigerant in the refrigerant circuit 5 Remove the flare nut from the upper part of the return oil circuit G 6 Remove the return oil circuit and the flare nut of the oil separator outlet port F NOTE When th...

Page 316: ...g hose Pipe cutter Adjustable wrench or spanner Pinching The following figures indicate the position of the coils RAS 8 12 FSXN RAS 14 18 FSXN B F E D C A A D C E F B A SVA solenoid valve coil B SVG solenoid valve coil C RVR1 reversing valve coil D RVR2 reversing valve coil E MV1 expansion valve coil F MVB expansion valve coil 10 Servicing 312 SMGB0065 rev 1 12 2010 ...

Page 317: ...coil before removing it Otherwise your hands may be hit against the piping as a reaction Carry out the procedure with great care to avoid any injures A B C 4 To fit the expansion valve coil press the coil inside the expansion valve slot by turning the coil C If you apply too much force to the coil the coil bracket can become deformed and the coil can not be fit correctly A If you apply too little ...

Page 318: ...e and the liquid stop valve 3 Collect the outdoor unit refrigerant from the low pressure check joint and the high pressure check joint Make sure that the pressure will not increase at this time NOTE If the pressure increases collect all the refrigerant in the refrigerant circuit 4 Remove the solenoid valve coil as described in the procedure Removing the solenoid valve coil SVA SVG see on page 314 ...

Page 319: ...g with the task collect the refrigerant from the refrigerant circuit into a cylinder and turn OFF the unit s power supply line 4 The position of the reversing valve C is shown in the figure 5 Disconnect the wiring of the reversing valve coil 6 Remove the reversing valve coil B RVR1 and D RVR2 as described in the procedure Removing the reversing valve coil RVR1 RVR2 see on page 315 7 Remove the wel...

Page 320: ... centre branch pipes of the three pipes from the reversing valve NOTE When removing the welding cover the reversing valve with a wet cloth to avoid the heat 9 To fit the reversing valve carry out this process in reverse order NOTE When welding cover the reversing valve with a wet cloth to avoid the heat 10 Servicing 316 SMGB0065 rev 1 12 2010 ...

Page 321: ... avoid the heat and remove the welding material When removing the liquid stop valve C remove the welding from the piping of the stop valves low pressure stop valve F and high pressure stop valve G NOTE In the case of the heat pump system connect the charge hose to the low pressure gas stop valve check joint before removing the welding To remove the welding of the high pressure stop valve A and the...

Page 322: ...rench or spanner Phillips screw driver Burner 1 Remove the front service cover as described in the procedure Removing the front service cover see on page 292 2 The high pressure switch A PSH1 and B PSH2 the high pressure sensor C Pd and the low pressure sensor D Ps are fixed in the position shown in the figure A C D C D B A RAS 8 12 FSXN RAS 14 18 FSXN 10 Servicing 318 SMGB0065 rev 1 12 2010 ...

Page 323: ...of the high pressure switch Make sure to fix the sleeve of the faston terminals as shown in the figure If these terminals are exposed and contact with the RC cover it can cause electrical damage to the components 10 13 2 Removing the high pressure sensor Pd and low pressure sensor Ps 1 Remove the connector for the pressure sensor wiring from the PCB1 NOTE First remove the connector If you do not y...

Page 324: ...the fixing plate I from the pipe F 4 Remove the thermistor from the fixing plate I NOTE When removing the thermistor of the liquid pipe take care not to catch your hands or the thermistor on the valve stay of the stop valve 5 To fit the thermistor carry out this procedure in reverse order NOTE When fitting the thermistor fix it with the end of the vinyl pipe H downward to avoid entering water into...

Page 325: ...F G H I A Te thermistor evaporation liquid line B Tbg thermistor Supercooling by pass line C Tg thermistor Evaporation gas line D Tchg thermistor Supercooling main line 10 Servicing 321 SMGB0065 rev 1 12 2010 10 ...

Page 326: ...escribed in the procedure Removing the upper cover see on page 293 NOTE When removing the upper cover take care not to damage the shroud 4 Remove the clamps that fix the wiring 5 To fit the ambient temperature thermistor carry out this procedure in reverse order NOTE If the upper cover is not correctly fixed it may cause vibrations in the upper cover when the outdoor unit fan is running Check the ...

Page 327: ...ction in the unit 6 When replacing the transmission PCB set the Dip switches to be the same as for the PCB you have replaced If the Dip switches are incorrectly set it will cause a malfunction in the unit Refer to the instructions in the manual attached with the servicing PCB 7 Do not apply too much force to the electric components of the PCB or to the PCB itself It may lead to PCB failure 8 When ...

Page 328: ...the numbered terminals with the band marked with numbers when reassembling them If they are connected incorrectly this may cause a malfunction and damage the electrical components Protect the electrical wiring so it does not get caught on the plate edge or the electrical components when closing the PCB fixing plate when reassembling The capacitor is charged with electricity when the power supply l...

Page 329: ...er supply lines of the transistor module E U V W and direct the wiring from the current sensor Also disconnect the wiring for N P and C 3 Remove the three M3 screws B remove the bushes C and the collars D of the PCB2 When fitting the PCB2 make sure that the bushes and the collars are well fixed NOTE Match the numbered terminals with the band marked with numbers when reassembling If they are connec...

Page 330: ...N206 and CN207 b Disconnect the wires of P N U V W of the transistor module c Remove the three M3 screws A that fix the PCB2 and remove the PCB2 from the transistor module d Remove the four M4 screws that fix the transistor module B e Remove the transistor module from the electrical box NOTE The correct position of the PCB2 and the transistor module are shown in the figure Match the numbered termi...

Page 331: ... this may cause a malfunction and damage the electrical components Check to ensure that the electrical wiring does not get caught between the electrical components and the mounting plate when you fit the PCB2 Lightly apply silicone conductive grease service parts No P22760 on the whole rear side of the fan controller when mounting 10 16 5 Fitting the electrical box 1 To fit the electrical box foll...

Page 332: ...for the temperature of the upper part of the compressor 337 11 3 3 Thermistor for the outdoor ambient temperature 338 11 3 4 Thermistor for the evaporating temperature of the outdoor unit in the heating operation For defrosting 338 11 3 5 Thermistor for super cooling bypass and main line temperature of outdoor unit 338 11 4 Electronic expansion valve 339 11 5 Pressure sensor 340 11 5 1 High pressu...

Page 333: ...00 0 50 10 75 100 115 f Hz NOTE The characteristics are fluctuated due to the current minimize control Soft start and stop 0 125 Hz s 0 25 Hz s 0 5 Hz s 1 Hz s 3 Hz s 5 steps Protection function Excessively high or low inverter voltage Excessively low voltage in case the DC voltage is lower than 350 V Excessively high voltage in case the DC voltage is higher than 750 V Malfunction in the current s...

Page 334: ...M The transistor module IPM has four protection functions to auto protect itself 1 Some of the output terminals between U and V V and W W and U has short circuit 2 Running current reaches the maximum rated current 3 The abnormal temperature is measured by internal thermistor 4 Abnormal decrease in control voltage Overload control The overload control with a current that is greater than the rated c...

Page 335: ... off or main power source is cut off 4 Transistor module IPM protection a Level of detection An anomaly is detected when some of the output terminals between U and V V and W W and U of the transistor module IPM are short circuited A malfunction is detected when the transistor module IPM running current reaches the rated current limit A malfunction is detected when the transistor module IPM thermis...

Page 336: ...d signal is transmitted sent to PCB1 For 10 seconds after the decrease lower than 88 in output current the compressor maximum frequency is limited to the specified value However if the frequency command is smaller than the maximum value the operation is carried out as per the command 3 Cancellation of the protection function After the described operation is performed for 10 seconds this control is...

Page 337: ...imum 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 continuously A Fixed scroll B Compression space C Rotating scroll D Gas 1 Suction process 2 Discharge process 3 Compression process 11 2 3 Structure The compressor has a structure for supplying oil ...

Page 338: ...eed compressor Total quantity E656DHD E655DH E855DH RAS 8 12 FSXN 1 1 RAS 14 16 FSXN 1 1 2 RAS 18FSXN 1 1 2 NOTE As viewed from the front side of the unit the compressor located on the left side is the Inverter compressor and the other one is the constant speed compressor 2 4 5 8 1 3 7 6 11 Electrical checks of the main parts 335 SMGB0065 rev 1 12 2010 11 ...

Page 339: ...11 3 Thermistors 11 3 1 Thermistor positions Thermistor positions for RAS 14 18 FSXN example 5 6 7 1 2 3 4 9 8 10 11 12 13 14 16 15 2 3 11 Electrical checks of the main parts 336 SMGB0065 rev 1 12 2010 ...

Page 340: ...3 When the temperature of the upper part of the compressor increases during heating operation the unit is controlled according to the following method a The expansion valve of the outdoor unit opens to return the liquid refrigerant to the compressor through the accumulator decreasing the compressor s temperature b If the temperature of the upper part of the compressor increases over 132 C even if ...

Page 341: ...defrosting The thermistor resistance characteristics are the same as in the outdoor ambient temperature thermistor Thermistor for the outdoor ambient temperature see on page 338 11 3 5 Thermistor for super cooling bypass and main line temperature of outdoor unit The thermistor resistance characteristics are the same as in the outdoor ambient temperature thermistor see on page 338 A KΩ B ºC 11 Elec...

Page 342: ... Operating time of coil less than 50 Direction of the installation Drive shaft in vertical direction at a 45 angle as maximum Direction of the flow Reversible Drive method 4 phase pulse motor method Rated voltage DC 12 V 1 2 V Drive condition 80 5 PPS Pulse width at ON 36 mm sec OFF 60 mm sec 1 2 phase excitation Coil resistance for each phase 46 Ω 3 Ω at 20 C Wiring diagram drive circuit and acti...

Page 343: ...sure control The suction pressure is detected during the cooling operation by means of a low pressure sensor and the compressor frequencies are controlled by the proportional control method with operating capacity of the indoor units or PID control for the compressor frequency therefore the suction pressure is controlled within an appropriate range If the suction pressure is excessively low the co...

Page 344: ...y be damaged However if the discharge pressure is higher than 4 15 MPa R410A the protection control is activated and the compressor will stop 5 6 7 1 2 3 4 1 PSH1 2 PSH2 3 Inverter compressor 4 Constant speed compressor 5 Faston terminal 6 High pressure switch 7 Welding 11 Electrical checks of the main parts 341 SMGB0065 rev 1 12 2010 11 ...

Page 345: ...connected to the power supply line NF1 Items Specifications Model 4LFB 22930 2F Rated Current AC 400 V 27 A Permissible temperature range From 25 C to 65 C Circuit diagram Cx L Cy1 Cy1 Cy1 Cy2 Cy2 L Cx L1 L2 L3 N E LINE IN LOAD OUT FU Z Z SA L1 L2 L3 N 70 Max 5 Max IN OUT L1 L2 L3 N E L1 N L3 L2 116 106 123 215 82 NOTE All measurements are in mm 11 Electrical checks of the main parts 342 SMGB0065 ...

Page 346: ... From 25 C to 60 C Circuit diagram Cy Cy Cx1 Cx2 Cx3 Cx4 L1 L2 L3 L4 L11 N1 L12 N2 E LINE LOAD FU Z Z SA Lot SP 226 1 250VAC 30A OKAYA LFB 14930 3MA E 194 5 170 105 6 4 2 65 4 579 70 Max 50 Max 5 Max 2 5 NOTE All measurements are in mm 11 Electrical checks of the main parts 343 SMGB0065 rev 1 12 2010 11 ...

Page 347: ... 4700 μF Rated voltage 450 V Allowed temperature range 25 C to 85 C Two capacitors in line are used CB3 This part is used to change the alternating current to direct current for fan controller Item Specifications Model LNT2W272MSEAHE Static electricity capacity 2700 μF Rated voltage 450 V Allowed temperature range 25 C to 105 C mm mm 11 Electrical checks of the main parts 344 SMGB0065 rev 1 12 201...

Page 348: ... current resistance 22 8 mΩ 20 at 20 C Allowed temperature range Maximum 60 C DCL2 Item Specifications Condition 3 0 mH Rated current 10 A Direct current resistance 0 13 Ω 10 at 25 C Allowed temperature range 10 C to 180 C NOTE All measurements are in mm 66 74 86 60 47 5 Max 85 60 47 58 74 4 5x10 61 6 60 800 Lead Wire Length 11 Electrical checks of the main parts 345 SMGB0065 rev 1 12 2010 11 ...

Page 349: ...ermissible concentration of hydrofluorocarbon HFC 352 12 5 2 Calculation of the refrigerant concentration 352 12 5 3 Countermeasures in the event of refrigerant leaks 352 12 6 Maintenance work 354 12 7 Service and maintenance table through the 7 segment display 355 12 8 Service and maintenance table through the remote control switch 357 12 9 Service and maintenance table 359 12 10 Saturation curve...

Page 350: ... Disconect the secondary side of the transformer and check the voltage by means of a tester circuit and voltage Primary side 220V or 240V Indoor Unit transformer Secondary side 12V 12V 3 Is the wiring loosened or incorrectly connected Check the wiring connection on the PCB Thermistor connectors Connector of the remote control cable Cobbector of the transformer Each connector in a high voltage circ...

Page 351: ...heating 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 charge Open the liquid stop valves slightly when you ...

Page 352: ... following ON OFF ON ON ON ON Power Source This system was used in a tenant building One of the 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 units were always ON 12 Maintenance notes 350 SMG...

Page 353: ...rom other outdoor units was circulated In this case though the outdoor temperature was 35 C the actual suction air temperature was nearly 50 C and the protection system for 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 6...

Page 354: ... V C R total quantity of refrigerant charged kg V volume of the room m3 C concentration of refrigerant 0 44 kg m3 for R410A gas Particularly for the SET FREE series whose outdoor units can be connected to multiple indoor units at a distance the refrigerant charge is greater than for individual units DANGER Check that the room where the indoor units will be installed can maintain the refrigerant co...

Page 355: ...e A Refrigerant charge 60 kg B Refrigerant piping C Outdoor unit D Indoor unit E Mechanical ventilation equipment F Gas leak detector G The smallest opening room H Small room I Medium sized room J Large room K Opening NOTE 1 The gas leakage quantity for each room large medium sized small and the smallest should be calculated as 60 kg 2 The gas concentration of each room should not exceed the limit...

Page 356: ...rent consumption amperage and the phase balance in particular Check that there are no contact faults caused by loose terminals rusty contacts foreign objects or other causes Check the electric insulation resistance F Control and protection devices Setting Do not readjust the setting in the field except those indicated in section Outdoor unit see on page 111 Only for outdoor units A Compressor Nois...

Page 357: ...mulated operation time of the unit UJ 4 3 Information of the outdoor unit 4 3 1 Capacity of the outdoor unit CA 4 3 2 Outdoor unit microcomputer output SC 52C1 52C2 CH1 CH2 A1 A2 211 212 52C1 52C2 CH1 CH2 A1 A2 211 212 FAN 20B 20C 20F1 20F2 20CHG X1 X2 FAN 20B 20C 20F1 20F2 20CHG X1 X2 4 3 3 Inverter frequency H1 4 3 4 Quantity of compressors running CC 4 3 5 Step of the outdoor unit fan Fo 4 3 6 ...

Page 358: ...r unit microcomputer output from the above table 4 3 2 Mark Description of mark Parts mark in wiring diagram 52C1 Contactor of relay Y52C1 on PCB1 for Inverter compressor CMC1 52C2 Contactor of relay Y52C2 on PCB1 for constant speed compressor CMC2 CH1 Contactor of relay YCH1 on PCB1 for crankcase heater CH1 CH2 Contactor of relay YCH2 on PCB1 for crankcase heater CH2 20A1 Contactor of relay Y20A1...

Page 359: ... 97 Temperature of the upper part of the compressor bA 98 Thermo temp of remote control switch bb C Indication of the microcomputer state I U microcomputer C1 O U microcomputer C2 D Stoppage cause state indication Stoppage cause state indication d1 E Alarm fault Abnormal times E1 Power failure times E2 Abnormal transmission times E3 Inverter trip times E4 F Automatic louver state Louver sensor sta...

Page 360: ... P1 9F NOTE I U Indoor unit O U Outdoor unit Customer _____________________________________________ Result Installation date _________________________________________ System number __________________________________________ Inspection date _________________________________________ Inspection technician _____________________________________ 12 Maintenance notes 358 SMGB0065 rev 1 12 2010 ...

Page 361: ...ct Incorrect 16 Is there leakage in the 4 way valves Check there is no leakage Correct Incorrect 17 Is there leakage in the check valve Check there is no leakage Correct Incorrect 18 Is there leakage in the accumulator Check there is no leakage Correct Incorrect 19 Is there leakage in the strainer Check there is no leakage Correct Incorrect 20 Is there leakage in the expansion valve Check there is...

Page 362: ...ing current A 36 Instructions for the customer for cleaning the filters Done Not yet 37 Instructions for the customer for the cleaning procedure Done Not yet 38 Instructions for the customer for operation Done Not yet 12 Maintenance notes 360 SMGB0065 rev 1 12 2010 ...

Page 363: ...12 10 Saturation curve for refrigerant MPa G ºC A Saturation pressure Liquid B Saturation temperature Liquid 12 Maintenance notes 361 SMGB0065 rev 1 12 2010 12 ...

Page 364: ...12 11 Mollier chart for R410A 12 Maintenance notes 362 SMGB0065 rev 1 12 2010 ...

Page 365: ...collector side so that the inside of the refrigerant cycle will be the atmosphere pressure Make sure that there is no pressure increase after collecting the refrigerant and then remove the charge hose Make sure that the refrigerant cycle is the atmosphere pressure Otherwise problems such as the blowing of gas and the suction of the cutting material will occur when removing the Comp 8 Turn OFF the ...

Page 366: ...y a refrigerant collector Measure the quantity of the collected refrigerant and record it 4 After collecting the refrigerant remove the charge hose at the collector side so that the inside of the refrigerant cycle will be the atmosphere pressure ake sure that there is no pressure increase after collecting the refrigerant and then remove the charge hose Make sure that the refrigerant cycle is the a...

Page 367: ... A is certified with ISO 9001 of AENOR Spain for its Quality Management accordance with the standard ISO 14001 of AENOR Spain for its Environmental Management systems accordance with the standard Hitachi air conditioning products are manufactured according to ISO 9001 of JQA Japan for its Quality Management accordance with the standard ISO 14001 of JACO Japan for its Environmental Management accor...

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