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Mitsubishi Electric PU(H)Y-P250YGM-A, Service Handbook

The Mitsubishi Electric PU(H)Y-P250YGM-A Service Handbook is a comprehensive manual for maintaining and troubleshooting your Mitsubishi Electric air conditioning system. This essential resource is available for free download on our website, ensuring that you have the necessary information at your fingertips to optimize the performance of your product.

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- 116 -

[ 

IX 

 Troubleshooting ]

1301

Abnormal low 
pressure

When starting the com-
pressor from Stop Mode 
for the first time if low-
pressure reads 
0.098MPa immediately 
before start-up, the oper-
ation immediately stops.

(1)  Inner pressure drop due to 

a leakage.

(2) Low pressure sensor fail-

ure

(3) Short-circuited pressure 

sensor cable due to torn 
outer rubber

(4) A pin on the male connec-

tor is missing.

(5) Disconnected wire
(6)  Failure of the low pressure 

input circuit on the control-
ler board

Refer to the section on troubleshoot-
ing the low pressure sensor.

Error Code

Error definition and error 

detection method

Cause

Check method and remedy

Summary of Contents for PU(H)Y-P250YGM-A

Page 1: ...Models Service Handbook AIR CONDITIONERS PU H Y P250YGM A PUHY P500YGM A PFD P250VM E PFD P500VM E ...

Page 2: ...earthquakes to prevent the unit from falling If the unit is not installed properly the unit may fall and cause serious injury to the person or damage to the unit Do not make any modifications or alterations to the unit Consult your dealer for repair Improper repair may result in water leakage electric shock smoke and or fire Do not touch the heat exchanger fins The fins are sharp and dangerous In ...

Page 3: ...electric shock and or fire After completing the service work check for a gas leak If leaked refrigerant is exposed to a heat source such as a fan heater stove or electric grill poisonous gases may be produced Do not try to defeat the safety features of the unit Forced operation of the pressure switch or the temperature switch by defeating the safety features of these devices or the use of accessor...

Page 4: ...igerant is charged into the system the com position of the refrigerant in the cylinder will change and may result in performance loss Use a vacuum pump with a reverse flow check valve If a vacuum pump that is not equipped with a reverse flow check valve is used the vacuum pump oil may flow into the refrigerant cycle and cause the refrigerating machine oil to deteriorate Prepare tools for exclusive...

Page 5: ...Doing so may lead to a remark able drop in performance electric shock malfunctions smoke and or fire The presence of organic solvents or corrosive gas i e am monia sulfur compounds and acid may cause gas leak age or water leakage When installing the unit in a hospital take appropriate mea sures to reduce noise interference High frequency medical equipment may interfere with the normal operation of...

Page 6: ...ent capacity The use of wrong capacity fuses steel wires or copper wires may result in malfunctions smoke and or fire Do not spray water on the air conditioner or immerse the air conditioner in water Otherwise electric shock and or fire may result Periodically check the installation base for damage If the unit is left on a damaged platform it may fall and cause injury Properly install the drain pi...

Page 7: ...it such as pipes and compressor may be either very cold or hot depending on the state of the refrigerant in the unit at the time To reduce the risk of frost bites and burns do not touch these parts with bare hands Do not operate the unit without panels and safety guards Rotating high temperature or high voltage parts on the unit pose a risk of burns and or electric shock Do not turn off the power ...

Page 8: ...e top and bottom of the unit 53 V Electrical Wiring Diagram 1 Electrical Wiring Diagram of the Outdoor Unit 59 2 Electrical Wiring Diagram of the Indoor Unit 61 VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 65 2 Principal Parts and Functions 68 VII Control 1 Functions and Factory Settings of the Dipswitches 75 2 Controlling the Outdoor Unit 80 3 Controlling the Indoor Unit 88 4 Operation Fl...

Page 9: ......

Page 10: ...als 5 4 Storage of Piping 7 5 Pipe Processing 7 6 Brazing 8 7 Air Tightness Test 9 8 Vacuum Drying Evacuation 10 9 Refrigerant Charging 11 10 Remedies to be taken in case of a Refrigerant Leak 11 11 Characteristics of the Conventional and the New Refrigerants 12 12 Notes on Refrigerating Machine Oil 13 ...

Page 11: ... 2 ...

Page 12: ...itioners for computer rooms Using a dryer other than the dedicated one may cause a malfunction Replace a dryer after the refrigerant circuit has been repaired If the dryer is left in the air it absorbs moisture Replace the dryer immediately 6 Verification of the connecting pipes Verify the type of refrigerant used for the unit to be moved or replaced Use refrigerant pipes made of phosphorus deoxid...

Page 13: ...efrigerant type is indicated The cylinder is pink Charging Port on the Refrigerant Cylinder Refrigerant charging The charge port diameter is larger than that of the current port Flare Nut Connection of the unit with the pipes Use Type 2 Flare nuts Tools Materials Use Notes Gas Leak Detector Gas leak detection The ones for use with HFC refrigerant may be used Vacuum Pump Vacuum drying May be used i...

Page 14: ...aterial Annealed even if the pipe diameter is less than ø19 05 3 4 For a system that uses R410A use pipes that are made with 1 2H material Drawn unless the pipe diameter is at least ø19 05 3 4 and the radial thickness is at least 1 2t The figures in the radial thickness column are based on the Japanese standards and provided only as a reference Use pipes that meet the local standards O material An...

Page 15: ...rgin adjustment a copper pipe gauge is necessary 6 Flare nut The flare nut type has been changed to increase the strength The size of some of the flare nuts have also been changed The figures in the radial thickness column are based on the Japanese standards and provided only as a reference Use pipes that meet the local standards Flare processing dimensions mm in Pipe size mm in A dimension mm R41...

Page 16: ...es and T joints in plastic bags The new refrigerator oil is 10 times as hygroscopic as the conventional refrigerating machine oil such as Suniso and if not handled with care could easily introduce moisture into the system Keep moisture out of the pipes for it will cause the oil to deteriorate and cause a compressor failure 5 Pipe Processing Use a small amount of ester oil ether oil or alkylbenzene...

Page 17: ...ipes or between a copper pipe and copper coupling If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends 2 Reasons The new refrigerating machine oil is 10 times as hygroscopic as the conventional oil and is more likely to cause unit failure if water infiltrates into the system Flux generally contains chloride Residual flux in the refrigerant cir...

Page 18: ... the location of a leak use R410A Refrigerant R410A must be charged in its liquid state vs gaseous state 2 Reasons Oxygen if used for an air tightness test poses a risk of explosion Only use nitrogen to check air tightness Refrigerant R410A must be charged in its liquid state If gaseous refrigerant in the cylinder is drawn out first the compo sition of the remaining refrigerant in the cylinder wil...

Page 19: ...orough vacuum drying removes moisture in the pipes Verify that the vacuum degree has not risen by more than 130Pa 1hour after evacuation A rise by less than 130Pa is ac ceptable If the vacuum is lost by more than 130Pa conduct evacuation following the instructions in section 6 Special vacuum dry ing 5 Procedures for stopping vacuum pump To prevent the reverse flow of vacuum pump oil open the relie...

Page 20: ...d become unsuitable for use 2 Notes When using a cylinder with a siphon refrigerant is charged in the liquid state without the need for turning it upside down Check the type of the cylinder on the label before use 10 Remedies to be taken in case of a Refrigerant Leak If the refrigerant leaks out it may be replenished The entire refrigerant does not need to be replaced Charge refrigerant in the liq...

Page 21: ...it may be replenished The entire refrigerant does not need to be replaced 3 Pressure characteristics The pressure in the system using R410A is 1 6 times as great as that in the system using R22 New Refrigerant HFC type Conventional Refriger ant HFC type R410A R407C R22 R32 R125 R32 R125 R134a R22 Composition wt 50 50 23 25 52 100 Type of Refrigerant Pseudo azeotropic Refrigerant Non azeotropic Ref...

Page 22: ...is defined as moisture air processing oil dust dirt wrong types of refrigerant and refrigerating machine oil Cause Symptoms Effects on the refrigerant cycle Water infiltration Frozen expansion valve and capillary tubes Clogged expansion valve and capillary tubes Poor cooling performance Compressor overheat Motor insulation failure Burnt motor Coppering of the orbiting scroll Lock Burn in on the or...

Page 23: ... 14 ...

Page 24: ... System configuration 17 2 Types and Maximum allowable Length of Cables 18 3 Switch Settings and Address Settings 20 4 An Example of a System to which an MA Remote Controller is connected 22 5 Restrictions on Pipe Length 30 ...

Page 25: ... 16 ...

Page 26: ...made on this system 5 The following functions cannot be selected on the PFD type indoor units 1 Switching between automatic power recovery Enabled Disabled Fixed to Enabled in the PFD type indoor units 2 Switching between power source start stop Fixed to Disabled in the PFD type indoor units 6 The PFD type indoor units and other types of indoor units cannot be grouped 7 The following functions are...

Page 27: ...le core cable to connect indoor units that belong to different refrigerant systems The use of a multiple core cable may result in signal transmission errors and malfunc tions Marked with NO in the figure below WARNING Have all electrical work performed by an authorized electrician according to the local regulations and instructions in this manual and a dedicated circuit must be used Insufficient c...

Page 28: ...ssion line 2 Remote controller wiring 1 The use of cables that are smaller than 0 75mm2 is recommended for easy handling Cable type Facility type All facility types Type Shielded cable CVVS CPEVS MVVS Number of cores 2 core cable Cable size Larger than 1 25mm2 Maximum transmission line distance between the outdoor unit and the far thest indoor unit 200 m max Maximum transmission line distance for ...

Page 29: ...oller and assign the address of the upper indoor controller 1 to the lower indoor controller The lower circuit board of the system with one refrigerant cir cuit is not used 00 MA remote controller MA No address settings required The main sub switch must be configured if two remote controllers are connected to the system or if the indoor units are con nected to different outdoor units Main Outdoor ...

Page 30: ... Sub 4 Selecting the position of temperature detection for the indoor unit Factory setting SWC Standard To use a suction temperature sensor set SWC to Option The suction temperature sensor is supplied as standard specification 5 Connection of two refrigerant circuits When two refrigerant circuits are connected on site make the switch settings on the controller circuit board following the instructi...

Page 31: ...al block for transmission line for centralized control TB7 3 Although two indoor controllers controller circuit boards are equipped inside the indoor unit the board on No 2 side lower side is not used Do not connect wiring to the lower controller circuit board 1 Indoor outdoor transmission line Maximum distance 1 25mm2 or larger L1 200m NO Two indoor controllers controller circuit boards are equip...

Page 32: ... setting is required as follows Pro ce dure s Unit or controller Address settin grange Setting method Notes Facto ry set ting 1 Indoor unit Main unit IC 01 to 50 Assign a sequential odd number starting with 01 to the upper in door controller 00 Sub unit IC 01 to 50 Assign sequential numbers start ing with the address of the main unit in the same group Main unit address 1 2 Outdoor unit OC 51 to 10...

Page 33: ... TB7 on only one ofthe outdoor units 5 When the power supply unit is connected to the transmis sion line for centralized control leave the male connector on the female power supply switch connector CN41 as it is Factory setting 1 Indoor outdoor transmission line Maximum distance 1 25mm2 or larger L1 L2 200m 2 Transmission line for centralized control Maximum line distance via outdoor unit 1 25mm 2...

Page 34: ...ielded cables Shielded cable connection To ground the shielded cable daisy chain the S terminals on the terminal block TB7 on each of the outdoor units Connect the S shielded terminal on the terminal block TB7 on the outdoor unit whose male connector on CN41 was disconnected and connected to CN40 to the earth terminal on the electric box 3 Switch setting Address setting is required as follows Pro ...

Page 35: ...r side is not used Do not connect wiring to the lower controller circuit board 4 No more than two MA remote controllers including both main and sub controllers can be connected to a group of in door units If three or more MA remote controllers are con nected remove the wire for the MA remote controller from the terminal block TB15 1 Indoor outdoor transmission line Same as 4 1 2 MA remote controll...

Page 36: ...or the setting method 3 Switch setting Address setting is required as follows Pro ce du res Unit or controller Address settin grange Setting method Notes Facto ry set ting 1 Indoor unit Main unit IC 01 to 50 Assign a sequential odd number starting with 01 to the upper indoor controller 00 Sub unit IC 01 to 50 Assign sequential numbers starting with the address of the main unit in the same group Ma...

Page 37: ...ontroller circuit board 4 No more than two MA remote controllers including both main and sub controllers can be connected to a group of in door units If three or more MA remote controllers are con nected remove the wire for the MA remote controller from the terminal block TB15 1 Indoor outdoor transmission line Same as 4 1 2 MA remote controller wiring Maximum overall line length 0 3 to 1 25mm2 m1...

Page 38: ...ows Pro ce du res Unit or controller Address settin grange Setting method Notes Facto ry set ting 1 Indoor unit Main unit IC 01 to 50 Assign a sequential odd number starting with 01 to the upper indoor controller 00 Sub unit IC 01 to 50 Assign sequential numbers starting with the address of the main unit in the same group Main unit address 1 2 Outdoor unit OC 51 to 100 Add 50 to the address assign...

Page 39: ...owable length Total pipe length L from the outdoor unit to thefarthest indoor unit Actual length 150m or less Allowable height difference Height difference between the indoor and the outdoor units H 50m or less 40m or less when the outdoor unit is lower 15m when the outdoor temperature is 10 C or lower Outdoor unit model Liquid pipe Gas pipe P250 model ø9 52 1 ø22 2 P500 model ø15 88 ø28 58 Outdoo...

Page 40: ... 31 III Outdoor Unit Components 1 Outdoor Unit Components and Refrigerant Circuit 33 2 Control Box of the Outdoor Unit 37 3 Outdoor Unit Circuit Board 39 ...

Page 41: ... 32 ...

Page 42: ...omponents III Outdoor Unit Components 1 Outdoor Unit Components and Refrigerant Circuit 1 PU H Y P250YGM A model 1 Front view of a outdoor unit 2 Rear view of a outdoor unit Heat exchanger Fan guard Heat exchanger Fan guard ...

Page 43: ...sure sensor Inverter compressor Pressure switch Accumulator High pressure check joint Gas side ball valve Liquid side ball valve Low pressure check joint Drier 4 way valve 21S4a Discharge muffler Sub cool coil Accumulator Oil separator Low pressure pressure sensor 2 way valve SV5b 4 way valve 21S4b Linear expansion valve LEV1 ...

Page 44: ... 35 III Outdoor Unit Components 2 PUHY P500YGM A model 1 Front view of a outdoor unit 2 Rear view of a outdoor unit Fan guard Heat exchanger Fan guard Heat exchanger ...

Page 45: ...pply compressor No 2 Oil separator No 1 Oil separator No 2 Pressure switch High pressure pressure sensor 4 way valve 21S4b 4 way valve 21S4a 4 way valve 21S4c 4 way valve 21S4b 4 way valve 21S4c Low pressure check joint Low pressure pressure sensor High pressure check joint Drier Oil tank Gas side ball valve Liquid side ball valve Linear expansion valve LEV1 Front view Rear view ...

Page 46: ... board Transmission line terminal block for centralized control TB7 Indoor outdoor transmission terminal block TB3 Power circuit board Choke coil L1 L2 Filter board Transformer DCL back Noise filter Rush current protection resistor R11 R12 Electromagnetic relay 52C1 Smoothing capacitor C11 C12 DCCT Gate amp board G A board Diode stack DS1 Fan control board ACCT U phase ACCT W phase ...

Page 47: ... terminal block TB3 Filter board Relay board Choke coil L1 L2 Transformer Control circuit board Power circuit board DCL back Gate amp board G A board Diode stack DS Smoothing capacitor C11 C12 Rush current protection resistor R11 R12 Electromagnetic relay 52C1 Noise filter Electromagnetic contactor 52F Fuse AC660V 50A Electromagnetic contactor 52C2 Overcurrent relay 51C2 Fan control board DCCT ACC...

Page 48: ...ut 1 2 DC30V 1 3 DC30V 4 5 DC7V 4 6 DC12V 7 8 DC7V CNRS3B LD2 CNAC3 Power output 3 L1 1 L2 CN20 Power intput 5 L1 CN21 Power intput 3 L2 1 N LD1 Service LED SW5 SW4 SW3 SW2 SWU2 SWU1 SW1 CNLVB CN3S CN3D CN3N CNRS3A CNS1 CNS2 CN40 CN41 CNRT1 CNOUT1 CN52C Control for 52C1 CN51 3 4 Compressor ON OFF 3 5 Trouble CN38 ...

Page 49: ...cuit board CNVCC1 Power supply 1 2 DC30V 1 3 DC30V 4 5 DC7V 4 6 DC12V 7 8 DC7V CN15V2 Power supply for IPM control F02 CNVDC SW1 SW2 CN52C CNFAN CNRS1 CNRS2 Serial transmission for MAIN board CNCT2 CNAC2 Power Source 5 L2 3 N 1 G CNTH CNCT CNDR2 ...

Page 50: ... LED2 SW2 CNTR IPM back CNINV Fan motor output Fuse CNRS2 52C2 52F CH12 Power input AC220 240V 51C2 Detection output CNOUT2 Relay driving input CNRT2 1 5 1 3 CNCH CH12 Power output 1 3 AC220 240V CN51C2 51C2 contact input CN52F 52F driving output 1 3 AC220 240V CN52C2 52C2 driving output 1 5 AC220 240V ...

Page 51: ... 42 III Outdoor Unit Components 5 Filter board 6 G A board CNFG CNL2 CNL1 CNOUT Controlled source output CNIN Controlled source input CNDR1 CN15V1 CNDC1 CNDC2 CNIPM1 ...

Page 52: ...door Unit Components 1 External Dimensions 45 2 Indoor Unit Components and Internal Structure 47 3 Control Box of the Indoor Unit 51 4 Indoor Unit Circuit Board 52 5 Separating the top and bottom of the unit 53 ...

Page 53: ... 44 ...

Page 54: ... 2 ø 32 knock out hole Hole for the power supply Body Nomal Local 1380 Remote controller A Refrig piping gas ø 22 2 braze Power supply White Operating Green Check Yellow Failure Red Accessory Filter Lamp view from A 320 220 1950 20 100 462 580 Panel ø 32 knock out hole Air inlet Control box 50 140 Hole for the control wiring ø 32 knock out hole Main drain piping connection Rp1 1 4 Accessory Liftin...

Page 55: ...Pipe execution space Panel opening and closing dimension Indoor unit Unit surface figure Service space 400 or more Unit front figure 1000 or more 1 200 or more 1 It is necessary for the removal of the panel beyond 600mm 500 or more 710 Refrig piping gas in 2 refrig circuit system type P450 ø 19 05 braze type P560 ø 22 2 braze No 2 680 2 ø 32 knock out hole ø 32 knock out hole Air outlet Air inlet ...

Page 56: ...ucture 1 PFD P250VM E model 1 Front view of a indoor unit 2 Rear view of a indoor unit Lock key X 2 Display lamp Panel for refrigerant circuit maintenance Panel for air filter maintenance Operation panel remote controller Panel for controller fan related parts maintenance ...

Page 57: ...b drain pan Suction temperature thermistor on the right side of heat exchanger Linear expansion valve LEV Drain pan Drain hose Pulley X 2 Pipes gas liquid Fan motor V belt Controller Air filter Fan casing on the back of controller Discharge temperature thermistor on the left side of fan casing Drain hose Pipes gas liquid Fan casing ...

Page 58: ... view of a indoor unit 2 Rear view of a indoor unit Lock key X 4 Panel for controller maintenance Display lamp Operation panel remote controller Panel for fan related parts maintenance Panel for refrigerant circuit maintenance Panel for air filter maintenance ...

Page 59: ...nger X 2 front No 1 back No 2 Sub drain pan Suction temperature thermistor on the right side of heat exchanger Linear expansion valve LEV Drain pan Operation panel Bearing Drain hose Pulley X 2 Pipes gas liquid Fan motor V belt Location of drain pan overflow detection float switch Controller Air filter Fan casing Discharge temperature thermistor on the left side of fan casing Bearing Pipes gas liq...

Page 60: ...iring Surge breaker 51F Fuse F1 Electro magnetic contactor 52F Relay X11 Z1 Z3 Controller board Transformer Circuit board for external I O Terminal block for transmission line on No 2 side upper Terminal block for MA remote controller lower Power supply terminal bed Terminal block for transmission line on No 1 side Motor wiring Surge breaker 51F Electro magnetic contactor 52F Relay X11 X12 Z1 Z2 Z...

Page 61: ...ain pump output CN60 LEV output SW1 2 3 4 Dip switch CN24 Control signal output CN51 Switch input LED1 LED2 CN31 Float switch input CN32 Switch input SWC Switching between discharge suction control Thermistor input CN20 CN21 CN29 CN22 CN33 Lamp output CN3A Remote controller connection CN53 Indoor control board No 1 To CN51 CN54 Indoor control board No 2 To CN51 TB22 Relay contact output No 1 opera...

Page 62: ...er by removing the hinges and the screws on the unit as shown in Fig 1 Open the filter cover and remove the filters 2 filters Model 500 Remove the front panels 4 rear panels 3 and the side panels 2 in this order by removing the hinges and screws on the unit as shown in Fig 1 Open the filter cover and remove the filters 3 filters 2 Disconnecting the electric wires Disconnect the wiring connectors f...

Page 63: ...ermistor wiring Float switch wiring Lamp wiring Remote controller wiring No 2 No 1 Fig 2 Model 500 Model 250 the wire from the lamp assy Bend the wire once and fix the wire Fix the wire from the fan motor Connect the wire from the lamp assy Connect the wire from the lamp assy ...

Page 64: ...Top section of the unit Bottom Bottom Bottom Top Top Top Control box Motor Control box Motor Fan Supporting wood piece Supporting wood piece Heat exchanger Piping side Heat exchanger Piping side Fan Note 1 Peel off the pipe cover carefully The cover will be needed again when putting the units together 2 When loading the unit on an elevator place the separated sections upright as shown below Place ...

Page 65: ...e 74N m Perform a test run and check for abnormal sound rattling and water leaks Using Fig 4 and Table 1 as a reference connect all connectors correctly Use a cable tie and bundle the wires as they were before Model 250 No 1 board Connector location on the board CN60 CN31 CN20 CN21 CN29 CN22 Connector location on the board Connector location on the adapter board No 1 board CN31 CN20 CN21 CN29 Same...

Page 66: ... 57 V Electrical Wiring Diagram 1 Electrical Wiring Diagram of the Outdoor Unit 59 2 Electrical Wiring Diagram of the Indoor Unit 61 ...

Page 67: ... 58 ...

Page 68: ...d black Motor Compressor F01 250VAC 2A T Refer to the service handbook about the switch operations CENTRAL CONTROL TRANSMISSION LINE CNRS2 Inverter controller box Function device liquid outlet temp detect at Sub cool coil Discharge pipe temp detect OA temp detect Pipe temp detect Hex outlet Choke coil Transmission Thermistor High pressure switch 4 way valve Electronic expansion valve SC coil Solen...

Page 69: ... TB7 Terminal Block TB1 Terminal Block ACNF Noise Filter M2 M1 M2 M1 shield shield CENTRAL CONTROL TRANSMISSION LINE INDOOR OUTDOOR TRANSMISSION LINE Power source 3N 380 400 415V 50 60Hz L3 N L1 L2 blue black white red blue N 1 9 2 1 9 1 5 6 10 9 14 13 10 14 13 9 6 5 1 2 black red red black 10 1 SW5 OFF OFF ON OFF ON OFF OFF ON ON ON LD1 SW4 SW3 SW2 SW1 10 1 10 1 10 1 10 1 DCCT L3 L2 1 2 S F12 AC6...

Page 70: ...LD L2 L1 L4 FAN over current detection 51F Z1 ZNR2 52F Z3 51F 52F MF TH24 TH21 TH22 TH23 6 5 4 3 2 1 LEV SYMBOL NAME DSA1 Surge absorber LED display power supply F901 ZNR1 ZNR2 ZNR901 MF I B S B IFB TB2 TB5 TB15 TB21 TB22 TB23 F1 T LEV 52F 51F 33P1 RC L4 L3 L2 L1 Z3 Z1 X11 SWC I B SW14 I B SW12 I B SW11 I B SW9 SW4 I B SW3 I B SW2 I B SW1 I B Surge absorber board Switch outlet inlet temp control F...

Page 71: ...SW7 SW4 SW14 0 F EDCBA 9 0 9 8 7 6 5 4 3 2 1 9 1 2 3 4 5 6 7 8 0 8 7 6 5 4 3 2 1 No 2 FAN over current detection 51F Z1 ZNR2 Z2 52F Z3 TH24 2 TH21 2 TH22 2 TH23 2 51F 52F MF NAME SYMBOL Surge absorber DSA1 L5 ZNR1 ZNR2 ZNR901 LED display No 2 failure LED display status LED display check LED display power supply MA Remote controller RC TB21 TB15 TB5 1 2 TB2 IFB S B AD B I B 1 I B 2 MF Surge absorbe...

Page 72: ... 63 VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 65 2 Principal Parts and Functions 68 ...

Page 73: ... 64 ...

Page 74: ...cuit 1 Refrigerant Circuit Diagram 1 System with one refrigerant 1 PU H Y P250YGM A model 21S4a 21S4b COMP O S CJ1 CJ2 63HS 63LS 63H SV1 HEX F HEX B SV5b TH8 TH11 TH5 TH6 TH7 CP2 ST8 LEV1 SCC ST4 ST3 CP1 Drier ST7 ST6 ACC BV1 BV2 ST1 ST2 TH23 TH22 ...

Page 75: ...S4b TH6 CP2 CP1 TH11 TH12 COMP 2 Oil Tank COMP 1 O S O S CJ3 CJ1 63H2 63H1 63HS ST7 ST6 ST5 SV1 SV3 CV1 CV2 HEX2b B HEX1b F TH5 TH8 SCC CP3 TH7 ST9 Drier LEV1 ST8 SV5c SV5b HEX2a B HEX1a F ST2 ST13 ST12 ST11 ST10 CJ2 63LS BV2 ACC BV1 ST1 TH23 1 TH22 1 TH23 2 TH22 2 ...

Page 76: ...P O S CJ1 CJ2 63HS 63LS 63H SV1 HEX F HEX B SV5b TH8 TH11 TH5 TH6 TH7 CP2 ST8 LEV1 SCC ST4 ST3 CP1 Drier ACC BV1 BV2 ST1 ST2 21S4a 21S4b COMP O S CJ1 CJ2 63HS 63LS 63H SV1 HEX F HEX B SV5b TH8 TH11 TH5 TH6 TH7 CP2 ST8 LEV1 SCC ST4 ST3 CP1 Drier ST7 ST6 ACC BV1 BV2 ST1 ST2 ST7 ST6 TH23 1 TH22 1 TH23 2 TH22 2 ...

Page 77: ... high pressure 2 Regulates frequency and pro vides high pressure protection Low pressure sensor 63LS 1 Detects low pressure 2 Provides low pressure protec tion Pressure switch 63H1 63H2 63H2 is available only on P500 model 1 Detects high pressure 2 Provides high pressure pro tection 4 15MPa OFF setting Pressure 0 4 15 MPa Vout 0 5 3 5V 0 071V 0 098 MPa Pressure MPa 1 38 x Vout V 0 69 GND Black Vou...

Page 78: ...t sink temperature Heat sink Controls inverter cooling fan based on THHS temperature 0 C 181kohm 10 C 105kohm 20 C 64kohm 25 C 50kohm 30 C 40kohm 40 C 26kohm Solenoid valve SV1 Discharge suction bypass 1 High low pressure bypass at start up and stopping and ca pacity control during low load operation 2 High pressure rise prevention AC220 240V Open while being powered closed while not being pow ere...

Page 79: ...vailable only on P500 model Heats the refrigerant in the com pressor Cord heater AC220 240V CH11 CH12 1280ohm 45W Resis tance check 4 way valve 21S4a Changeover between heating and cooling AC220 240V Dead cooling cycle Live heating cycle Continuity check with a tester 21S4b 1 Changeover between heating and cooling 2 Controls outdoor unit heat ex changer capacity AC220 240V Dead cooling cycle Outdo...

Page 80: ...C 15kohm 10 C 9 7kohm 20 C 6 4kohm 25 C 5 3kohm 30 C 4 3kohm 40 C 3 1kohm Resistance check TH22 Pipe tem perature Indoor unit control Freeze pre vention Pre heating stand by TH23 Gas pipe tempera ture LEV control during cooling oper ation Superheat detection TH24 Dis charge air tempera ture Controls indoor unit discharge thermostat Float Switch 33P1 Detects drain pan water level Contact Resistance...

Page 81: ... 72 ...

Page 82: ... 73 VII Control 1 Functions and Factory Settings of the Dipswitches 75 2 Controlling the Outdoor Unit 80 3 Controlling the Indoor Unit 88 4 Operation Flow Chart 92 ...

Page 83: ... 74 ...

Page 84: ...trol Forced defrost starts Anytime after power on When switched from OFF to ON 10 minutes after compressor start up 8 Defrost timer setting 50 minutes 90 minutes Anytime after power on When switched from OFF to ON 9 10 SW3 1 SW3 2 function en abled disabled SW3 2 disabled SW3 2 enabled Anytime after power on 2 Test run mode ON OFF Stops all ICs Sends a test run signal to all IC After power on and ...

Page 85: ...system 240hr 120hr Anytime after power on 3 4 Thermo ON OFF conditions control Valid Invalid Anytime after power on 5 6 7 8 9 10 SWU 3 Reset of the integrat ed operation time Resetting the integrated operation time according to the settings of SW4 4 and 4 5 After power on when switching from 0 or 1 to 2 Switch Function Function according to switch setting Switch setting timing OFF ON OFF ON Note A...

Page 86: ... which may be set to a certain setting for a reason Switch Function Function according to switch setting Switch setting timing OFF ON OFF ON SW1 1 Enabling disabling the following error detection functions ACCT or DCCT sensor circuit error 530X Detail No 115 116 ACCT or DCCT sensor failure 530X Detail No 117 118 IPM open Disconnected CNCT2 530X Detail No 119 Detection of erroneous wiring 530X Deta...

Page 87: ...y While the unit is stopped Remote controller OFF Note 1 Setting timing for DIPSW 1 and 3 is during unit stoppage remote controller OFF It is not necessary to reset the settings by power off Note 2 Settings in the shaded areas are factory settings Model System Capacity code SW3 2 1 2 3 4 5 6 P250 50 OFF ON OFF P500 Two refrigerant circuit connection One refrigerant circuit connection One refrigera...

Page 88: ...emperature control Discharge temperature control The settings for the two circuit boards must be equivalent to switch between suction discharge temperature control under two refrigerant circuit system Remote controller Switching switch 1 ON 2 3 4 Switch 2 1 Function Remote controller main sub setting At power on of the remote controller Normal startup Timer mode startup 3 Cooling heating display s...

Page 89: ... operation 2 Bypass valve SV3 P500 model only ON Open The opening of SV3 is controlled by the operating state of No 1 and No 2 compressors Operation SV1 ON OFF At No 1 compressor start up or at No 2 compressor start up P500 model only ON for 4 minutes After the restoration of thermo or 3 minutes after restart ON for 2 minutes During cooling or heating operation with the compressor stopped Always O...

Page 90: ...nt No 2 compressor will stop its operation 2 Pressure limit The maximum limit of high pressure Pd is set for each frequency level If this limit is exceeded the frequency will be reduced every 30 seconds 3 Discharge temperature limit The discharge temperature Td of the compressor in operation is detected and if it exceeds the upper limit the frequency is reduced by 5 Hz Control is performed 30 seco...

Page 91: ...ave passed since the beginning of defrost operation 15 minutes when the defrost prohibit timer is set to 90 minutes or when the piping temperature TH5 of 10 C or above has been continuously detected for 2 minutes TH5 above 7 C for 2 minutes for P500 model and above Defrost operation will not stop its operation for 2 minutes once started unless the piping temperature exceeds 25 C within 2 minutes i...

Page 92: ...e indoor unit unit under stopping mode fan mode cooling heating with thermo off being opened for 15 seconds 2 Periodic capacity control of the outdoor units and periodic LEV control of the indoor units will be suspended during refrigerant recovery operation they will be performed after the recovery has been completed 3 Defrost operation will be suspended until refrigerant recovery has been complet...

Page 93: ...nd SV5c are open when it is not powered and is closed when it is powered While the unit is stopped 21S4b and 21S4c are not powered cooling cycle and SV5b and SV5c are open 8 Subcool Coil Control Linear Expansion Valve LEV1 The amount of super heat is controlled and kept constant based on the bypass outlet temperature TH8 of subcool coil every 30 seconds The degree of opening is controlled based on...

Page 94: ...the self diagnosis switch SW1 as below Start of initial operation mode Step 1 P250 P500 Operation of No 1 compressor only Exception Completed if discharge superheat reaches above 25 C within 5 minutes of start up Step 3 Forced operation of only No 2 compressor only Completed in the integrated operation time of 5 minutes Completion of initial operation mode f 60 Hz Completed in the integrated opera...

Page 95: ...on Only the indoor fan operates unless problems are found with the fan When problems are found in only one of the two units of a 2 refrigerant circuit only the unit with the problems will run an emergency operation or stop its operation and the other unit will keep running its operation Emergency operation is intended only as a first aid until the unit is serviced Have the unit serviced without de...

Page 96: ...ehumidification by increasing the frequency of the compressor when the external signal dehumidification command is received during cooling operation During dehumidification priority control the room temperature may drop below the preset temperature set during normal operation Under this control the set temperature wil be compulsory at the minimum value Under discharge temperature control 14 C Unde...

Page 97: ...troller circuit boards inside the controller as follows The SWC settings made on two controller circuit boards must be equivalent 20HP only Only the suction temperature control is performed in the heating mode regardless of the SWC settings To perform suction temperature control Set SWC to Option To perform discharge temperature control Set SWC to Standard Target Temperature 1 C AND TH21 is higher...

Page 98: ...hen errors are detected in each refrigerant circuit Extinguished during normal operation or after error reset Lit when the inspection switch of the indoor unit is ON during inspection Extinguished when the switch is OFF during normal operation 3 Temperature Setting Range The temperature range can be set between 19 C 14 C and 30 C using the remote controller when the suction temperature control or ...

Page 99: ...s When the demand for outdoor unit changes from Thermo ON to Thermo OFF When operation mode changes from normal to emergency mode When anti freeze mode is completed The outdoor unit has also a twenty second restart suspension mode and it works separately from the indoor unit In heating mode the mode changes to three minute restart prevention mode 6 Anti Freeze Control In cooling mode 1 Starting Co...

Page 100: ...sume its operation after power supply is restored Depending on the duration of power outage the following operations will be run Note 1 When indoor unit is in the maintenance mode it will not resume operation even after the power has been restored Note 2 After the unit resumes its operation MA remote controller will display HO for fifteen seconds during which timethe MA remote controller will not ...

Page 101: ...on Error command to outdoor unit Indoor unit LEV fully closed Refer to 2 1 Cooling operation Refer to 2 2 Heating operation Refer to 2 3 for dry operation Prohibition Prohibition Prohibition Dry display Heating display Cooling display Dry mode Heating mode Fan mode Fan display Fan operations Operation mode Cooling mode Operation command to outdoor unit to 2 Prohibition Blinking display on the remo...

Page 102: ...out 1 minutes after power on search for the indoor unit address for the remote controller address and for the group information will start During this HO blinks on the display of the remote controller Note 3 The units will follow the operation mode commands from the indoor unit Note 2 The error mode includes that of indoor units and outdoor units When the unit goes into the error mode both the ind...

Page 103: ...g MA remote controller Cooling operation Test run mode ON Thermostat ON 3 minute restart prevention Note 1 Note 2 YES YES YES NO NO NO 4 way valve OFF 1 Inverter frequency control 2 Indoor unit LEV LEV1 control 3 Solenoid valve control 4 Outdoor unit fan control 5 52C control Normal operation During test run mode Unit in the stopped state Indoor unit fan operation 1 Inverter output 0Hz 2 Indoor un...

Page 104: ... 1 Indoor unit fan stops Note 3 2 Inverter defrost frequency control 3 Indoor unit LEV fully closed 4 Solenoid valve control 5 Outdoor unit fan stop 6 SC coil LEV control 7 52C control Note 1 When outdoor unit starts defrosting it transmits defrost operations command to indoor unit and the indoor unit starts defrosting operations Similarly when defrosting operation stops indoor unit returns to hea...

Page 105: ... 96 ...

Page 106: ...e a Test Run 99 2 Test Run Method 100 3 Operating Characteristic and Refrigerant Amount 101 4 Adjusting the Refrigerant Amount 102 5 Refrigerant Amount Adjust Mode 104 6 The following symptoms are normal 106 7 Standard Operation Data Reference Data 107 ...

Page 107: ... 98 ...

Page 108: ...nd oil balance pipe are fully open Caution Securely tighten the cap 4 Check the phase sequence and the voltage of the 3 phase power supply Caution If an open phase or a reverse phase is detected it will be treated as an abnormal stop during test run 4103 error 5 When the power supply extension unit for transmission line is connected Turn on the power of the power supply extension unit for transmis...

Page 109: ...unit is operated Remarks Factory setting SW8 Note 2 The error code is displayed on the remote controller when the error lamp is lit on the indoor unit during test run Refer to the next page or later for details of error codes Note 3 Set the Dip SW5 4 to ON on the outdoor unit if the test run cannot be kept due to low load After the test run is completed set the Dip SW5 4 to OFF The SW must be swit...

Page 110: ...when all indoor units are in operation 3 General tendency of discharge temperature Discharge temperature tends to rise when the system is short on refrigerant Changing the amount of refrigerant in the system while there is refrigerant in the accumulator has little effect on the discharge temperature The higher the pressure the more likely it is for the discharge temperature to rise The lower the p...

Page 111: ...ontroller Overcharged refrigerant 2 The operating frequency does not reach the set frequency and there is a problem with performance Insufficient refrigerant amount 3 The system comes to an abnormal stop displaying 1102 abnormal discharge temper ature on the controller Symptoms Conclusion 1 Discharge temperature is high Normal discharge temperature is below 95 C Slightly under charged refrigerant ...

Page 112: ...gth of liquid pipe is ø12 7 L3 0 06 when the length of liquid pipe is ø9 52 L4 0 024 when the length of liquid pipe is ø6 35 L Length of liquid pipe For indoor units Refer to the table below Total capacity of connected in door units For indoor units kg P250 model 2 0 P500 model 4 0 Indoor When the liquid pipe size is 15 88 and the pipe length is 150m Outdoor 150m 15 88 According to the above formu...

Page 113: ...t is between 5 and 15K to determine that the refrigerant amount is adequate 2 High pressure must be at least 2 0MPa to enable a proper adjustment of refrigerant amount to be made 3 Adjust the refrigerant amount based on the values of TH1 TH5 TH7 and Tc and by following the flow chart below TH1 TH5 TH7 and Tc can be displayed by setting the self diagnosis switch SW1 on the main board on the out doo...

Page 114: ...te 1 Note 3 Gradually add refrigerant from the service port on the low pressure side Keep the unit running for 5 minutes after adjusting the refrigerant amount to determine its adequacy Keep the unit running for 5 minutes after adjusting the refrigerant amount to determine its adequacy SW2 4 OFF SW2 4 ON Adjustment complete Note 4 Has the initial start up mode been completed Gradually add refriger...

Page 115: ...oise is generated from the power supply the transmission line or the unit body as a microcomputer is used in the air conditioner Equipment such as wireless microphones or medical equipment that amplifies a minute electric signal may mal function due to noise if the unit is installed adjacent to such equipment If the unit is installed adjacent to equip ment such as electric discharge machine that g...

Page 116: ...length m 7 5 Outdoor unit Compressor frequency No 1 No 2 Hz 50Hz 70 50 60Hz 62 60 LEV opening Indoor unit Pulse 593 SC LEV1 193 Pressure High pressure after O S low pressure before accumulator MPa 2 90 0 99 Temp of each sec tion Outdoor unit Discharge TH11 TH12 C 84 85 Heat exchanger out let TH5 43 Compressor inlet 22 23 Compressor shell bottom 43 45 SC heat exchanger outlet TH7 26 Bypass outlet T...

Page 117: ... 108 ...

Page 118: ...ontroller 114 3 Investigation of Transmission Wave Shape Noise 144 4 Troubleshooting Principal Parts 147 5 Refrigerant Leak 167 6 Compressor Replacement Instructions Only P500 type 168 7 Collecting the Cooling Liquid from the Accumulator Only P500 type 169 8 Maintenance Inspection Schedule 170 ...

Page 119: ... 110 ...

Page 120: ...bnormal fan O 4115 Power supply sync signal abnormality Frequency abnormality O 4220 4225 Note 4320 4325 Note 108 Bus voltage drop S W detection O 109 Bus voltage rise S W detection O 110 Bus voltage abnormality H W detection O 111 Logic error O 4230 4235 Note 4330 4325 Note Heatsink overheat protection THHS abnormality O 4240 4245 Note 4340 4345 Note Overload protection O 4250 4255 Note 4350 4355...

Page 121: ...1 4300 115 ACCT sensor failure O 116 DCCT sensor failure O 117 ACCT sensor circuit failure O 118 DCCT sensor circuit failure O 119 IPM open Disconnected ACCT connector O 120 ACCT faulty wiring detection O 6600 Address overlaps O O O 6601 Polarity setting error O 6602 Transmission processor hardware error O O O 6603 Transmission circuit bus busy O O O 6606 Communication error with the transmission ...

Page 122: ...y code error O O 7102 Error in the number of connected units O 7105 Address setting error O 7110 Unset unit connection information error O 7111 Remote controller sensor failure O 7113 Function setting error O 7116 Replace Multi setting error O 7117 Model setting error O 7130 Incompatible units O O The last digit Inverter address system Inverter system 0 or 1 1 Compressor inverter system 5 5 Fan in...

Page 123: ...the main board and the connector CNRS1 on the compressor INV board or between the connector CNRS3A on the main board and the connector CNRS2 on the FAN INV board and check contact of the connectors Check for contact of the connector CNAC3 on the main board or of the connector CNTR on the FAN INV board 2 Inverter address switch setting error Check the setting for SW2 1 on the inverter board on the ...

Page 124: ...the first detection and the operation de scribed in step 1 above will start 5 For 30 minutes after the stop the first stop or the second stop of the outdoor unit pre liminary errors will be displayed on the LED display 1 Gas leak gas shortage Refer to the page on refrigerant amount evaluation 2 Overload operation Check operating conditions and op eration status of indoor outdoor units 3 LEV failur...

Page 125: ...nner pressure drop due to a leakage 2 Low pressure sensor fail ure 3 Short circuited pressure sensor cable due to torn outer rubber 4 A pin on the male connec tor is missing 5 Disconnected wire 6 Failure of the low pressure input circuit on the control ler board Refer to the section on troubleshoot ing the low pressure sensor Error Code Error definition and error detection method Cause Check metho...

Page 126: ... operation for 2 7 Check the indoor units for problems and correct them if any 8 Short cycle on the outdoor unit 9 Dirty heat exchanger of the out door unit Check the outdoor units for prob lems and correct them if any 10 Outdoor fan including fan parts failure motor failure or fan controller malfunction 9 and 10 above occur due to condensing capacity drop in cooling mode Check the fan on the outd...

Page 127: ...door unit preliminary errors will be displayed on the LED display 1 Overcharged refrigerant Refer to the page on refrigerant amount evaluation 2 Thermistor input circuit failure on the main board 3 Faulty mounting of ther mistor TH11 TH12 Check the temperature and the pres sure of the sensor with LED monitor 2503 Float switch trip When the float switch trips during operation and when an open is de...

Page 128: ...ain board is faulty 4108 Overcurrent protection 1 First detection If 51C2 is started dur ing the operation of No 2 compressor the outdoor unit goes into 20 second restart mode then the out door unit will start in 20 seconds Set val ue of the over current relay 17 5A 2 Second detection If 51C2 is started again within a minute after restarting in com pliance with 1 above the unit makes an er ror sto...

Page 129: ... the wire is not discon nected 5 Disconnected wire Check the contact of the connector 6 Indoor controller I B1 I B2 failure If the items described above are all normal the circuit board is faulty 4115 Power supply sync signal ab normality The frequency cannot be determined when the power is switched on 1 Power supply error Check the voltage of the power sup ply terminal block TB1 2 A fuse is blown...

Page 130: ...rks normally Refer to 4 Or check 52C wire connection 3 Check for diode stack failure Refer to 5 4 Check the wiring and the connectors of the CNVDC on the FAN INV board Replace FAN INV board when no fault is found for the above 1 4 3 Main board failure Check whether AC220 240V is applied to the male connector CN52C on the main board during inverter operation If not applied check the main board and ...

Page 131: ...or higher is detect ed In the case of 4235 When the heat sink temperature THHS5 85 C or higher is detect ed 1 Power supply environment Measure the power supply voltage Ensure that the power supply volt age is 342V or more between each phase 2 Air passage blockage Check that the heat sink cooling air passage is not blocked 3 Faulty wiring Check for cooling fan wiring 4 THHS failure Check for THHS s...

Page 132: ...245 THHS5 6 Compressor INV board failure and cooling fan fail ure Ensure that the heasink temperature is 55 C or more and that 220 240V is applied to the inverter PCB con nector CNFAN when the inverter is on 7 Cooling failure Check the cooling fan operation un der the above operating conditions 8 Current sensor ACCT failure Refer to 9 4 6 4 Current sensor ACCT 9 Compressor Inverter cir cuit failur...

Page 133: ...the load side is detected just be fore starting the inverter In the case of 4250 1 Grounding fault of com pressor 2 Inverter output related Refer to 9 4 6 2 In the case of 4255 1 Grounding fault of fan mo tor 2 FAN INV board failure Refer to 9 4 6 2 6 Refer to 9 4 6 2 7 Overcurrent error due to short circuited motor Detail code105 When a short is detected on the compressor or the fan motor just be...

Page 134: ...r higher Open detectable at 40 C or lower Sensor error at gas side cannot be detected un der the following condi tions During heating oper ation During cooling operation for 3 minutes after the compressorturns on 1 Thermistor failure 2 Connector contact failure 3 Disconnected wire or par tial disconnected ther mistor wire 4 Unattached thermistor or contact failure Check the thermistor resistor 0 C...

Page 135: ...r code 5101 5103 5104 5105 5106 5107 or 5108 will appear 5 During 3 minute anti restart mode prelimi nary errors will be dis played on the LED display 6 A short or an open de scribed above is not detected for 10 min utes after the com pressor start during defrost mode or for 3 minutes after defrost mode 1 Thermistor failure Check thermistor resistance 5105 Piping TH5 2 Pinched lead wire Check for ...

Page 136: ... ing the operation the outdoor unit stops once turns to anti re start mode for 20 sec onds and restarts after 20 seconds when the detected high pressure sensor is 0 098MPa or more 2 If the high pressure sensor detects 0 098MPa or less just before the restart the outdoor unit makes an error stop and the er ror code 5201 will appear 3 During 3 minute anti restart mode prelimi nary errors will be dis...

Page 137: ...lure Check the contact of the connector CNCT2 ACCT on the compressor INV board 2 ACCT sensor failure Replace the ACCT sensor DCCT sensor failure Detail code 116 When the bus current less than 6 5 Apeak is detected at startup 6Hz 1 Contact failure Check the contact of the connector CNCT DCCT on the compressor INV board and the contact around the connector on DCCT side 2 Misorientation Check the ins...

Page 138: ...unit again 1 If the same error occurs within 5 min utes find the unit that has the same address as that of the error source unit When the same address is found change the addresses turn off the powers of the outdoor and the indoor units leave them OFF for 5 minutes or more and then turn them ON again 2 If the same error does not occur for 5 minutes or more check transmission wave shape noise on tr...

Page 139: ... applied on the transmission line for centralized control Check method and remedy YES YES YES YES YES NO NO NO NO NO Is the transmission line work performed while the power is on Check the power source of the indoor unit Power supply voltage Check the transmission line work is performed and the shielded wire is treated properly Faulty power source work Turn off the power source of outdoor indoor u...

Page 140: ...se indicates that the error source controller is a failure If noise exists investigate the noise No noise indicates that the error source controller is a failure If noise exists investigate the noise 6606 Communication error with the transmission processor Communication error between the main microcomputer on the indoor unit board and the mi crocomputer for transmission Note The address attribute ...

Page 141: ...accidental it will run normally If not check the causes 1 4 Indoor unit IC Main remote controller SC MA remote controller MA No ac knowl edgement ACK at SC trans mission to IC 1 Error occurrence on all IC in the system with one outdoor unit 1 Total capacity error 7100 2 Capacity code error 7101 3 Error in the number of connect ed units 7102 4 Address setting error 7105 5 Disconnection or short cir...

Page 142: ...ard 6 Turn on the power source of the out door unit Error Code Error definition and error detec tion method Cause Check method and remedy 6608 No response When no response command is returned although acknowl edgement ACK is received after transmission an error is detected When the data is transmitted 10 times in a row with 3 sec onds interval an error is de tected on the transmission side Note Th...

Page 143: ...e noise on MA re mote controller line by following 3 In vestigation method of transmission wave shape noise 7 When no problems are found with items 1 through 6 replace the indoor unit board or the MA remote controller The following status can be con firmed on LED1 and 2 on the in door unit board LED1 is lit The main power source of the indoor unit is turned on LED2 is lit MA remote controller line...

Page 144: ... board When the model name set by the switch is different from that of the unit connected turn off the pow er source of the outdoor and the indoor units and change the set ting of the capacity code The capacity of the indoor unit can be confirmed by the self diagnosis function SW1 operation of the out door unit 7102 Outdoor unit Error in the number of connected units The number of connect ed indoo...

Page 145: ...esistance 1 Faulty wiring 2 Disconnected connector short circuit or contact failure 3 The type of the INV circuit board is not applicable to thecompressor Replaced wrongly 4 Wrong setting of the main circuit board of the system unit 1 Check the connector on the main circuit board and the con nectors of CNTYP 1 4 and 5 2 Check the type of the replaced INV circuit board If it is not appli cable to t...

Page 146: ...or the MA remote con troller and the AC220 240V power wire vi Reversed connection of the wire for the MA remote controller and the M NET transmission line on the in door unit 3 The number of the MA remote controllers that are connected to an indoor unit exceeds the allow able range 2 units 4 The length or the diameter of the wire for the MA remote controller are out of specification 5 Short circui...

Page 147: ...l block The indoor transmission line is connected incorrectly to the transmission terminal block for centralized control ler TB7 4 Disconnected M NET transmis sion line on the indoor unit side 5 Disconnected wire between the terminal block for M NET line TB5 of the indoor unit and the in door unit board CN2M or discon nected connector 1 If the causes 1 5 apply LED5 M NET transmission voltage displ...

Page 148: ...r the MA remote controller No 2 and disconnected line to the terminal block Reversed daisy chain connection between groups Incorrect wiring for the MA remote controller to the terminal block for trans mission line connection TB5 on the indoor unit The M NET transmission line is connected incorrectly to the terminal block TB15 for the MA remote controller 7 The address of the outdoor unit is the ad...

Page 149: ...To the page that explains the occurred error code NO To section 1 The power of only the indoor unit is turned ON again YES YES NO After the error is corrected reconnect the daisy wirings of the MA remote controller NO The operation returns to normal when the daisy wirings of the MA remote controller are reconnected YES Although No 1 refrigerant circuit is normal No 2 refrigerant circuit remains st...

Page 150: ...ED Note Higher Te than Tem causes in sufficient capacity SW1 setting Note Protection works and compres sor frequency does not rise even at higher Te than Tem due to high discharge temperature and high pressure At high discharge temperature Refer to 1102 At high pressure Refer to 1302 2 Indoor unit LEV malfunction Insufficient refrigerant flows due to LEV malfunction not enough opening or protectio...

Page 151: ... to solenoid valve failure Refer to the page on troubleshooting of the solenoid valve 11 LEV1 malfunction Sufficient liquid refrigerant is not be supplied to the indoor unit as sufficient sub cool cannot be se cured due to LEV1 malfunction Refer to the page of LEV troubleshooting 9 4 5 It most likely happens when there is little dif ference or no difference between TH5 and TH7 12 TH5 TH7 TH2 TH8 a...

Page 152: ...her than pulse Repair the external wiring Disconnected wire or contact failure Replace the controller circuit board Go to the page that describes the occurred error Input the signal with pulse signal or with level signal with the DipSW 1 9 OFF Select Normal Make the DipSW settings as specified NO NO NO NO NO YES YES YES YES Possible to start and stop CN51 between 1 and 2 on the controller circuit ...

Page 153: ...d 2 The sectional voltage level of transmission signal should be as follows Cause Erroneous operation Error code Error code definition Noise interference on the transmission line Signal is transformed and will be misjudged as the signal of another address 6600 Address overlaps Transmission wave pattern is transformed due to the noise creating a new signal 6602 Transmission pro cessor hardware er r...

Page 154: ...nt method of the shield of the transmission line for cen tralized control When group operation of indoor units connected to different outdoor units is performed provide grounding of the shield of the transmission line for centralized control at the point of out door unit and when the system controller is used provide grounding at the point of the system controller so that the ef fect of noise can ...

Page 155: ... the MA remote controller and the indoor unit is interrupted for 3 minutes in a row MA transmission error 6831 will occur 2 Confirmation of transmission specifications and wave pattern A 1 B 2 No polarity Across terminal No 1 2 Power supply 8 5V to 12VDC Satisfies the formula 12 msec bit 5 Voltage among terminals must be between DC8 5 and 12 V TB15 A 1 B 2 1 2 MA remote controller Transmission wav...

Page 156: ...ot change the high pressure sensor has a problem 3 Remove the high pressure sensor from the main board to check the pressure on the self diagnosis LED1 1 When the pressure displayed on self diagnosis LED1 is between 0 and 0 098MPa the high pressure sensor has a problem 2 When the pressure displayed on self diagnosis LED1 is approximately 4 15MPa the main board has a problem 4 Remove the high press...

Page 157: ...w pressure sensor has a problem 2 When the pressure displayed on self diagnosis LED1 is approximately 1 7MPa the main board has a problem When the outdoor temperature is 30 C or less the main board has a problem When the outdoor temperature exceeds 30 C go to 5 4 Remove the low pressure sensor from the main board and short circuit between the No 2 and 3 connectors 63LS to check the pressure with t...

Page 158: ...e of P500 model and between HEX1b and 2b heat exchanger on the left as you face the front of the unit When powered The electricity runs between the heat exchanger and the accumulator and the valve opens or closes the heat exchanger circuit when cooling or heating Check the LED display and the switching sound to check whether the valve has no faults however it may be occasionally difficult to check...

Page 159: ...e while the valve is being powered When the valve is open high temperature gas will run Do not touch the pipe when checking the temperature 6 In case of SV5b 2 way switching valve This 2 way valve is closed when powered Check the LED display and the switching sound to check whether the valve has no faults When cooling the switching coincides with 21S4b When it is difficult to check by the sound ch...

Page 160: ...low the inverter output will appear 100 indicates the full speed and 0 indicates the stopping As the revolution of the fan changes under control at the interphase or when the indoor unit operation capacity is low the revolution of the fan may change When the fan does not work or an abnormal vibration occurs the FAN board has a problem or the fan motor runs under open phase or opposite phase The mi...

Page 161: ...CNLV2 Drive circuit DC 12V Control board Output state Output phase number 1 2 3 4 1 ON OFF OFF ON 2 ON ON OFF OFF 3 OFF ON ON OFF 4 OFF OFF ON ON Output pulses change in the following orders when the Valve is closed 1 2 3 4 1 Valve is open 4 3 2 1 4 1 When the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoo...

Page 162: ...hen the LEV opening angle does not change all the output phases will be off 2 When the output is open phase or remains ON the motor cannot run smoothly and rattles and vibrates Output phase number Output state When the power is turned on the valve closing signal of 520 pulses will be output from the indoor board to LEV to fix the valve position It must be fixed at point A Pulse signal is output fo...

Page 163: ...They are normal if resistance is 150 ohm 10 Replace the LEV coils Indoor unit Measure resistance between the coils red white red orange brown yellow brown blue using a tester They are normal if resistance is 46 ohm 3 Replace the LEV coils outdoor unit Incomple sealing leak from the valve When checking the refrigerant leak from the In door unit LEV run the target indoor unit in the fan mode and the...

Page 164: ...y gripped undue force will be applied and the pipe will be bent Installing the coils Fix the body tightly at the bottom Part A in the figure so that the body will not move then insert the coils from the top and insert the coil stopper securely in the pipe on the body Hold the body when pulling out the coils to prevent so that the pipe will not be bent If the coils are pushed without the body gripp...

Page 165: ...d proceed to 2 3 if the compressor is in operation 5 The compressor vibrates violently at all times or makes an abnor mal sound See 2 3 6 Only the fan motor does not operate Check the inverter frequency on the LED monitor and proceed to 2 6 7 if the fan motor is in operation 7 The fan motor vibrates violently at all times or makes an abnormal sound Check the inverter frequency on the LED monitor a...

Page 166: ...V board error de tection circuit Perform the following Remove the connector CNDR2 on the compressor INV board Operate the outdoor unit after above steps Check the error status The compressor does not run because CNDR2 which out puts the IPM drive signal has been disconnected 1 IPM overcurrent breaker trip 4250 Detail code No 101 102 103 104 105 106 and 107 Replace the compressor INV board 2 Logic ...

Page 167: ...f the voltage imbalance across all wiring is great er than the larger of the values represented by 5 or 5V 3 No voltage imbalance across all wiring See item 2 Proceed to item 5 however if there is no problem in section 2 Replace the compressor if there is no problem in section 5 4 Check whether the inverter is damaged Perform this check if an error occurs during operation Turn on the outdoor unit ...

Page 168: ... im balance or error reoccurrence Replace the G A board In the case of an output voltage im balance or error reoccurrence after replacement Replace the INV board 6 Check the fan motor ground fault or the winding Remove the wire for the outdoor fan motor and check the fan motor megger and the winding resistance 1 Fan motor megger failure Failure when the megger is 1Mohm or less Replace the fan moto...

Page 169: ...erter circuit Diode stack IPM Rush current protection resistor DC reactor 2 Turn on the power again and check again 1 Main power breaker trip 2 No remote control display 3 Turn on the outdoor unit and check that it operates normally 1 Operates normally without trip ping the main breaker i The wiring may have been short circuited Search for the wire that short circuited and repair it ii If item i a...

Page 170: ...istance between terminals 1 ohm or lower almost 0 ohm Measure the resistance between terminals and the chassis Current sensor ACCT Disconnect the CNCT2 connector and measure the resistance between terminals 280 ohm 30 ohm 1 2 PIN U phase 3 4 PIN W phase Check point Judgment value A1 A2 0 1 k 2 0 k Button on hold down Button OFF L1 T1 L2 T2 L3 T3 13 14 31 32 L1 T1 L2 T2 L3 T3 13 14 31 32 13 Pushbut...

Page 171: ...not allowed Tester restriction Use the tester whose internal electrical power source is 1 5V or greater Use the dry battery powered tester The accurate diode specific resistance cannot be measured with the button battery powered card tester as the ap plied voltage is low Use a low range tester if possible A more accurate resistance can be measured Judgment value reference Black P N U V W Red P 5 2...

Page 172: ...ery small If the output wire from the IPM to the compressor is connected incorrectly the compressor will be damaged Perform wiring carefully in order of color shown in the wiring diagram below 2 Coat the radiation surface of the IPM and diode stack evenly with the grease that is provided with the service parts Apply a thin layer of grease to the entire surface of the back of the IPM and diode stac...

Page 173: ...ine for centralized control DC 24 30 V TB7 52C1 Solenoid valve 4 way valve Terminal block for power source Fuse 2 A Fuse 6 3 A Compressor G A board INV board IPM drive circuit DC DC converter 7 V Power supply 30 V Power supply Microcomputer Microcomputer 52C1 Relay LEV Drive circuit CN40 Main board Cooling fan Cooling fan Drive circuit 5 V Power supply Noise filter Rectifier Smoothing capacitor In...

Page 174: ...puter Cooling fan Cooling fan Drive circuit 12VPowersupply 15 V Power supply 12 V Power supply 5 V Power supply Power supply for centralized control Power supply for indoor transmission line Indoor outdoor transmission block DC 24 30 V TB3 Terminal block for transmission line for centralized control DC 24 30 V TB7 Main board Microcomputer 5 V Power supply Indoor unit MA remote controller DC 8 5 12...

Page 175: ...Check if the connector CNL1 and CNL2 on the INV board are not disconnected Check if the indoor outdoor transmission line is not short circuited and repair the problem Check whether the transmission line is disconnected check for contact failure and repair the problem Connected Check the wiring between connectors CNS1 and TB3 Check if the connector CNS1 is not disconnected Disconnected Connect it C...

Page 176: ...ion 2 Check the values of Tc and TH7 To display the values on the LED screen use the self diagnosis switch SW1 on the outdoor unit main board i When Tc TH7 is 10K or more See the next item 3 ii When Tc TH7 is less than 10K After the compressor stops collect the refrigerant inside the system repair the leak perform evacuation and recharge new refrigerant Leak spot In the case of outdoor unit handle...

Page 177: ...move the crankcase heater After replacing the dryer do not leave the refrigerant circuit for long time 10 Heat the brazed part of the discharge pipe and the suction pipe and remove the pipes 11 Remove the compressor fixing nuts and the metal fitting 2 3 places on HN71 12 Replace the compressor with the service compressor 13 Braze the discharge pipe and the suction pipe 14 Attach the oil balance pi...

Page 178: ...erived from the accumulator and the recovery cylinder with a connection pipe or hose that has predetermined withstand pressure Note When the check joint and the connecting pipe hose are connected extremely low temperature oil may flow out Use some protective clothing such as leather gloves 3 Open the valves of the recovery cylinder while the recovery cylinder is being weighed and collect the liqui...

Page 179: ...e chart shows an approximate longevity of parts It is an estimation of the time when old parts may need to be replaced or repairs need to be made It does not mean that the parts must absolutely be replaced except for the fan belt Please note that the figures in the chart do not mean warranty periods 2 Notes The above chart shows a maintenance schedule for a unit that is used under the following co...

Page 180: ...logging or damage Clean Check for unusual noise Measure insulation resistance Free of unusual sound Insulation resistance over 1M Replace if insulation resistance goes below 1M Make sure the lamp comes on Comes on when the output is Rapid drop in brightness on Replace if the light does not come on when the power is on Perform an operation check using the operation data Adequately controls the refr...

Page 181: ...mains on the nonvolatile memory on the indoor and outdoor units If an error history remains take out the data before an error occurs and correct the error after analyzing the causes Check each component based on the maintenance inspection items described on the previous page If problems are found repair the component Delete the error code history recorded on the nonvolatile memory on the unit afte...

Page 182: ... 173 X LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 175 ...

Page 183: ... 174 ...

Page 184: ...s 18 8kg cm2 Item No 72 The unit of pressure is in kg cm2 Use the following conversion formula to convert the displayed value into a value in SI unit Value in SI unit MPa Displayed value kg cm2 x 0 098 2 Flag display Each set of 2 lines in vertical alignment indicates a flag Example 3 minutes restart mode Item No 14 2 LED display at initial setting From power on until the completion of initial set...

Page 185: ... turned off and then on again the count will resume from the time before the power was turned off Thus the time that differs the actual time will be displayed This also applies when a power failure occurs The system controller such as G50 adjusts the time once a day When the system controller is connected the time will be automatically updated to the correct current time after the time set by the ...

Page 186: ...ted If no errors are detected appears on the display 3 1100000000 Relay out put display 2 21S4a 21S4b 21S4c CH11 CH12 4 0010000000 Relay out put display 3 SV1 SV3 5 1010000000 Relay out put display 4 SV5b SV5c 52F 6 0110000000 7 1110000000 Special con trol Retry opera tion 8 0001000000 9 1001000000 Communica tion demand capacity 0000 to 9999 If not demanded controlled appears on the display 10 010...

Page 187: ...0 26 0101100000 27 1101100000 28 0011100000 29 1011100000 30 0111100000 Indoor unit thermostat Unit No 1 Lit when thermo stat is on Unlit when ther mostat is off 31 1111100000 32 0000010000 33 1000010000 34 0100010000 35 1100010000 36 0010010000 37 1010010000 38 0110010000 39 1110010000 Outdoor unit Operation mode Permis sible stop Standby Cooling Heating Defrost 40 0001010000 41 1001010000 42 010...

Page 188: ...o 999 9 52 0010110000 53 1010110000 54 0110110000 55 1110110000 56 0001110000 57 1001110000 58 0101110000 59 1101110000 60 0011110000 THHS1 99 9 to 999 9 The unit is C 61 1011110000 62 0111110000 63 1111110000 THHS5 99 9 to 999 9 The unit is C 64 0000001000 65 1000001000 66 0100001000 67 1100001000 68 0010001000 69 1010001000 70 0110001000 71 1110001000 72 0001001000 High pres sure sensor data 99 ...

Page 189: ...5 1010101000 86 0110101000 87 1110101000 All tempo rary frequen cies 0000 to 9999 Control data Hz 88 0001101000 Control fre quency of COMP 1 0000 to 9999 89 0001101000 Control fre quency of COMP 2 0000 to 9999 90 0101101000 91 1101101000 Operation frequency of COMP 1 0000 to 9999 Operation fre quency of com pressor Hz 1 92 0011101000 93 1011101000 94 0111101000 AK1 0000 to 9999 Control data 95 111...

Page 190: ...nit is h 118 0110111000 COMP1 Op eration time Lower 4 dig its 0000 to 9999 119 1110111000 COMP2 Op eration time Upper 4 dig its 0000 to 9999 120 0001111000 COMP2 Op eration time Lower 4 dig its 0000 to 9999 121 1001111000 122 0101111000 123 1101111000 COMP 1 number of start stop events Upper 4 dig its 0000 to 9999 Count up at start up The unit is Time 124 0011111000 COMP 1 number of start stop eve...

Page 191: ...36 0001000100 137 1001000100 138 0101000100 139 1101000100 140 0011000100 141 1011000100 142 0111000100 143 1111000100 144 0000100100 145 1000100100 146 0100100100 147 1100100100 148 0010100100 149 1010100100 150 0110100100 151 1110100100 152 0001100100 153 1001100100 154 0101100100 155 1101100100 156 0011100100 157 1011100100 158 0111100100 159 1111100100 160 0000010100 161 1000010100 162 0100010...

Page 192: ... Error details of inverter Error details of inverter 0001 0120 180 0010110100 Error history 2 0000 to 9999 181 1010110100 Error details of inverter Error details of inverter 0001 0120 182 0110110100 Error history 3 0000 to 9999 183 1110110100 Error details of inverter Error details of inverter 0001 0120 184 0001110100 Error history 4 0000 to 9999 185 1001110100 Error details of inverter Error deta...

Page 193: ...ror details of inverter 0001 0120 198 0110001100 Error history of inverter At the time of last data backup be fore error 0000 to 9999 199 1110001100 Error details of inverter Error details of inverter 0001 0120 200 0001001100 201 1001001100 Outdoor unit operation status Warm up mode 20 sec onds re start mode Com pressor in oper ation Prelimi nary er ror Error 20 sec onds re start after in stanta n...

Page 194: ...13 1010101100 Relay out put display 3 Lighting SV1 SV3 214 0110101100 Relay out put display 4 Lighting SV5b SV5c 52F 215 1110101100 216 0001101100 TH11 99 9 to 999 9 The unit is C 217 1001101100 TH12 99 9 to 999 9 218 0101101100 219 1101101100 TH5 99 9 to 999 9 220 0011101100 TH6 99 9 to 999 9 221 1011101100 TH7 99 9 to 999 9 222 0111101100 TH8 99 9 to 999 9 223 1111101100 224 0000011100 225 10000...

Page 195: ... 9999 251 1101111100 Qjh 0000 to 9999 252 0011111100 Target Tc 99 9 to 999 9 The unit is C 253 1011111100 Target Te 99 9 to 999 9 254 0111111100 Tc 99 9 to 999 9 255 1111111100 Te 99 9 to 999 9 256 0000000010 257 1000000010 258 0100000010 All tempo rary frequen cies 0000 to 9999 Control data Hz 259 1100000010 Control fre quency of COMP 1 0000 to 9999 260 0010000010 Control fre quency of COMP 2 000...

Page 196: ... 0001100010 281 1001100010 282 0101100010 COMP 1 bus voltage 99 9 to 999 9 The unit is V 283 1101100010 284 0011100010 285 1011100010 286 0111100010 287 1111100010 288 0000010010 COMP 1 Op eration time Upper 4 dig its 0000 to 9999 The unit is h 289 1000010010 COMP 1 Op eration time Lower 4 dig its 0000 to 9999 290 0100010010 COMP 2 Op eration time Upper 4 dig its 0000 to 9999 291 1100010010 COMP 2...

Page 197: ...er 4 dig its 0000 to 9999 297 1001010010 COMP 2 number of start stop events Lower 4 dig its 0000 to 9999 298 0101010010 299 1101010010 300 0011010010 301 1011010010 302 0111010010 303 1111010010 304 0000110010 305 1000110010 306 0100110010 307 1100110010 308 0010110010 309 1010110010 310 0110110010 311 1110110010 312 0001110010 313 1001110010 314 0101110010 315 1101110010 316 0011110010 317 101111...

Page 198: ...26 0110001010 327 1110001010 328 0001001010 329 1001001010 330 0101001010 331 1101001010 332 0011001010 333 1011001010 334 0111001010 335 1111001010 336 0000101010 337 1000101010 338 0100101010 339 1100101010 340 0010101010 341 1010101010 342 0110101010 343 1110101010 344 0001101010 345 1001101010 346 0101101010 347 1101101010 348 0011101010 349 1011101010 350 0111101010 Current data ...

Page 199: ...355 1100011010 356 0010011010 357 1010011010 358 0110011010 359 1110011010 360 0001011010 361 1001011010 362 0101011010 363 1101011010 364 0011011010 365 1011011010 366 0111011010 367 1111011010 368 0000111010 369 1000111010 370 0100111010 371 1100111010 372 0010111010 373 1010111010 374 0110111010 375 1110111010 376 0001111010 377 1001111010 378 0101111010 379 1101111010 380 0011111010 381 101111...

Page 200: ...394 0101000110 395 1101000110 396 0011000110 397 1011000110 398 0111000110 399 1111000110 400 0000100110 401 1000100110 402 0100100110 403 1100100110 404 0010100110 405 1010100110 406 0110100110 407 1110100110 IC Preset temperature 99 9 to 999 9 The unit is C 408 0001100110 IC1 Suction temperature 99 9 to 999 9 409 1001100110 410 0101100110 411 1101100110 412 0011100110 413 1011100110 414 01111001...

Page 201: ...010110 422 0110010110 423 1110010110 424 0001010110 425 1001010110 426 0101010110 427 1101010110 428 0011010110 429 1011010110 430 0111010110 431 1111010110 432 0000110110 433 1000110110 434 0100110110 435 1100110110 436 0010110110 437 1010110110 438 0110110110 439 1110110110 440 0001110110 441 1001110110 442 0101110110 443 1101110110 444 0011110110 445 1011110110 Data on indoor unit system ...

Page 202: ...e temperature 99 9 to 999 9 The unit is C 459 1101001110 460 0011001110 461 1011001110 462 0111001110 463 1111001110 464 0000101110 465 1000101110 466 0100101110 467 1100101110 468 0010101110 469 1010101110 470 0110101110 471 1110101110 472 0001101110 473 1001101110 474 0101101110 475 1101101110 476 0011101110 477 1011101110 478 0111101110 479 1111101110 480 0000011110 481 1000011110 482 010001111...

Page 203: ... 511 1111111110 512 0000000001 Self address Alternate display of self address and unit model 513 1000000001 IC address Count up display of number of connected units 514 0100000001 515 1100000001 516 0010000001 517 1010000001 Main board S W version etc S W version Refrigerant type Model and capacity Communication address Refer to 2 LED display at initial setting 518 0110000001 519 1110000001 520 00...

Page 204: ...41 1011100001 542 0111100001 543 1111100001 544 0000010001 545 1000010001 546 0100010001 547 1100010001 548 0010010001 549 1010010001 550 0110010001 551 1110010001 552 0001010001 553 1001010001 554 0101010001 555 1101010001 556 0011010001 557 1011010001 558 0111010001 559 1111010001 560 0000110001 561 1000110001 562 0100110001 563 1100110001 564 0010110001 565 1010110001 566 0110110001 567 1110110...

Page 205: ...1100001001 580 0010001001 581 1010001001 582 0110001001 583 1110001001 584 0001001001 585 1001001001 586 0101001001 587 1101001001 588 0011001001 589 1011001001 590 0111001001 591 1111001001 592 0000101001 593 1000101001 594 0100101001 595 1100101001 596 0010101001 597 1010101001 598 0110101001 599 1110101001 600 0001101001 601 1001101001 602 0101101001 603 1101101001 604 0011101001 605 1011101001...

Page 206: ...01 621 1011011001 622 0111011001 623 1111011001 IC1SC 99 9 to 999 9 The unit is deg C 624 0000111001 625 1000111001 626 0100111001 627 1100111001 628 0010111001 629 1010111001 630 0110111001 631 1110111001 632 0001111001 633 1001111001 634 0101111001 635 1101111001 636 0011111001 637 1011111001 638 0111111001 639 1111111001 640 0000000101 641 1000000101 642 0100000101 643 1100000101 644 0010000101...

Page 207: ...1 661 1010100101 662 0110100101 663 1110100101 664 0001100101 665 1001100101 666 0101100101 667 1101100101 668 0011100101 669 1011100101 670 0111100101 671 1111100101 672 0000010101 673 1000010101 674 0100010101 675 1100010101 676 0010010101 Compressor INV board S W version 0 00 to 99 99 677 1010010101 678 0110010101 679 1110010101 Fan INV board S W version 0 00 to 99 99 680 0001010101 681 1001010...

Page 208: ... 2 00 00 to 99 12 1 to 31 Year and month and date alter nate display 698 0101110101 Time of error detection 5 00 00 to 23 59 Hour minute 699 1101110101 Time of error detection 5 2 00 00 to 99 12 1 to 31 Year and month and date alter nate display 700 0011110101 Time of error detection 6 00 00 to 23 59 Hour minute 701 1011110101 Time of error detection 6 2 00 00 to 99 12 1 to 31 Year and month and d...

Page 209: ...d date alter nate display 712 0001001101 713 1001001101 714 0101001101 IC1 LEV opening 0000 to 2000 Fully open 2000 715 1101001101 716 0011001101 717 1011001101 718 0111001101 719 1111001101 720 0000101101 721 1000101101 722 0100101101 723 1100101101 724 0010101101 725 1010101101 726 0110101101 727 1110101101 728 0001101101 729 1001101101 730 0101101101 731 1101101101 732 0011101101 733 1011101101...

Page 210: ...1101011101 748 0011011101 749 1011011101 750 0111011101 751 1111011101 752 0000111101 753 1000111101 754 0100111101 755 1100111101 756 0010111101 757 1010111101 758 0110111101 759 1110111101 760 0001111101 761 1001111101 762 0101111101 763 1101111101 764 0011111101 IC1 Opera tion mode 0000 Stop 0001 Ventilation 0002 Cooling 0003 Heating 0004 Dry 765 1011111101 766 0111111101 767 1111111101 768 000...

Page 211: ...0000011 774 0110000011 775 1110000011 776 0001000011 777 1001000011 778 0101000011 779 1101000011 780 0011000011 781 1011000011 782 0111000011 783 1111000011 784 0000100011 785 1000100011 786 0100100011 787 1100100011 788 0010100011 789 1010100011 790 0110100011 791 1110100011 792 0001100011 793 1001100011 794 0101100011 795 1101100011 796 0011100011 797 1011100011 798 0111100011 799 1111100011 Da...

Page 212: ...1 812 0011010011 813 1011010011 814 0111010011 IC1 filter 0000 to 9999 Hours since last maintenance h 815 1111001001 816 0000101011 817 1000101011 818 0100101011 819 1100101011 820 0010101011 821 1010101011 822 0110101011 823 1110101011 824 0001101011 825 1001101011 826 0101101011 827 1101101011 828 0011101011 829 1011101011 830 0111101011 831 1111101011 832 0000011011 833 1000011011 834 010001101...

Page 213: ...854 0110101011 855 1110101011 856 0001101011 857 1001101011 858 0101101011 859 1101101011 860 0011101011 861 1011101011 862 0111101011 863 1111101011 864 0000011011 865 1000011011 866 0100011011 867 1100011011 868 0010011011 869 1010011011 870 0110011011 871 1110011011 U phase current ef fective val ue 1 99 9 to 999 9 The unit is A 872 0001011011 W phase current ef fective val ue 1 99 9 to 999 9 8...

Page 214: ...82 0100111011 883 1100111011 884 0010111011 Fan INV board Reset counter 0 to 254 The unit is time 885 1010111011 886 0110111011 887 1110111011 888 0001111011 889 1001111011 890 0101111011 891 1101111011 892 0011111011 893 1011111011 894 0111111011 895 1111111011 896 0000000111 897 1000000111 898 0100000111 899 1100000111 900 0010000111 901 1010000111 902 0110000111 903 1110000111 904 0001000111 90...

Page 215: ...Service Handbook PU H Y P250YGM A PUHY P500YGM A PFD P250VM E PFD P500VM E Issued in Jun 2006 HWE05250 Printed in Japan New publication effective Jun 2006 Specifications subject to change without notice ...

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