Mitsubishi Electric PUHZ-SHW112VAA Service Manual Download Page 2

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INDOOR UNIT SERVICE MANUAL

1-1. FOR AIR TO WATER SYSTEM

Model name

Service ref.

Service manual No.

EHST20C-VM6HB

EHST20C-YM9HB

EHST20C-TM9HB

EHST20C-VM2B

EHST20C-VM6B

EHST20C-YM9B

EHST20C-VM6EB

EHST20C-YM9EB

EHST20C-VM6SB

EHST20C-VM6HB.UK

EHST20C-YM9HB.UK

EHST20C-TM9HB.UK

EHST20C-VM2B.UK

EHST20C-VM6B.UK

EHST20C-YM9B.UK

EHST20C-VM6EB.UK

EHST20C-YM9EB.UK

EHST20C-VM6SB.UK

OCH531/OCB531

EHSC-VM2B

EHSC-VM6B

EHSC-YM9B

EHSC-TM9B

EHSC-VM6EB

EHSC-YM9EB

ERSC-VM2B

EHSC-VM2B.UK

EHSC-VM6B.UK

EHSC-YM9B.UK

EHSC-TM9B.UK

EHSC-VM6EB.UK

EHSC-YM9EB.UK

ERSC-VM2B.UK

OCH532/OCB532

EHST20C-VM2C

EHST20C-VM6C

EHST20C-YM9C

EHST20C-TM9C

EHST20C-VM2EC

EHST20C-VM6EC

EHST20C-YM9EC

EHST20C-MHCW

EHST20C-MEC

ERST20C-VM2C

ERST20C-MEC

EHST20D-VM2C

EHST20D-VM2EC

EHST20D-YM9C

EHST20D-MHCW

EHST20D-MEC

EHST20D-MHC

EHST20C-VM2C(R1/R2).UK

EHST20C-VM6C(R1/R2).UK

EHST20C-YM9C(R1/R2).UK

EHST20C-TM9C(R1/R2).UK

EHST20C-VM2EC(R1/R2).UK

EHST20C-VM6EC(R1/R2).UK

EHST20C-YM9EC(R1/R2).UK

EHST20C-MHCW(R1/R2).UK

EHST20C-MEC(R1/R2).UK

ERST20C-VM2C(R1/R2).UK

ERST20C-MEC(R1/R2).UK

EHST20D-VM2C(R1/R2).UK

EHST20D-VM2EC(R1/R2).UK

EHST20D-YM9C(R1/R2).UK

EHST20D-MHCW(R1/R2).UK

EHST20D-MEC(R1/R2).UK

EHST20D-MHC(R1/R2).UK

OCH570/OCB570

EHSC-MEC

EHSC-VM2C

EHSC-VM2EC

EHSC-VM6C

EHSC-VM6EC

EHSC-YM9C

EHSC-YM9EC

EHSC-TM9C

ERSC-MEC

ERSC-VM2C

EHSD-MC

EHSD-MEC

EHSD-VM2C

EHSD-YM9C

ERSD-VM2C

EHSC-MEC(R1/R2).UK

EHSC-VM2C(R1/R2).UK

EHSC-VM2EC(R1/R2).UK

EHSC-VM6C(R1/R2).UK

EHSC-VM6EC(R1/R2).UK

EHSC-YM9C(R1/R2).UK

EHSC-YM9EC(R1/R2).UK

EHSC-TM9C(R1/R2).UK

ERSC-MEC(R1/R2).UK

ERSC-VM2C(R1/R2).UK

EHSD-MC(R1/R2).UK

EHSD-MEC(R1/R2).UK

EHSD-VM2C(R1/R2).UK

EHSD-YM9C(R1/R2).UK

ERSD-VM2C(R1/R2).UK

OCH571/OCB571

PAC-IF011B-E

PAC-IF032B-E

PAC-IF011B-E

PAC-IF032B-E

OCB427

PAC-IF061B-E

PAC-IF061B-E(R1/R2)

OCB572

PAC-SIF051B-E

PAC-SIF051B-E(R2)

OCB536

REFERENCE MANUAL

OCH651

Summary of Contents for PUHZ-SHW112VAA

Page 1: ...5 OUTLINES AND DIMENSIONS 11 6 WIRING DIAGRAM 12 7 WIRING SPECIFICATIONS 16 8 REFRIGERANT SYSTEM DIAGRAM 17 9 TROUBLESHOOTING 20 10 MONITORING THE OPERATION DATABY THE REMOTE CONTROLLER 59 11 DISASSEMBLY PROCEDURE 65 Note This manual describes service data of the outdoor units only AIR TO WATER HEAT PUMP UNITS Service Ref PUHZ SHW80VAA UK PUHZ SHW112VAA UK PUHZ SHW80YAA UK PUHZ SHW112YAA UK PUHZ S...

Page 2: ...20C VM2C R1 R2 UK EHST20C VM6C R1 R2 UK EHST20C YM9C R1 R2 UK EHST20C TM9C R1 R2 UK EHST20C VM2EC R1 R2 UK EHST20C VM6EC R1 R2 UK EHST20C YM9EC R1 R2 UK EHST20C MHCW R1 R2 UK EHST20C MEC R1 R2 UK ERST20C VM2C R1 R2 UK ERST20C MEC R1 R2 UK EHST20D VM2C R1 R2 UK EHST20D VM2EC R1 R2 UK EHST20D YM9C R1 R2 UK EHST20D MHCW R1 R2 UK EHST20D MEC R1 R2 UK EHST20D MHC R1 R2 UK OCH570 OCB570 EHSC MEC EHSC VM...

Page 3: ...ing can cause deterio ration of refrigerant oil etc If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc Store the piping indoors and both ends of the piping sealed until just before brazing Leave elbow joints etc in their packaging If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of compress...

Page 4: ...linder 1 Check that cylinder for R410A on the market is a syphon type 2 Charging should be performed with the cylinder of syphon stood vertically Refrigerant is charged from liquid phase No Tool name Specifications 1 Gauge manifold Only for R410A Use the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3 MPa G or over 2 Charge hose Only for R410A Use pressure performance ...

Page 5: ...t the refrigerant Use new pipes for SW75 SW100 and SW120 models The existing pipe thickness does not meet specifications or the pipes are damaged 2 4 PRECAUTIONS FOR SALT PROOF TYPE BS MODEL Although BS model has been designed to be resistant to salt damage observe the following precautions to maintain the per formance of the unit 1 Avoid installing the unit in a location where it will be exposed ...

Page 6: ...minal dimensions in Flare nut dimensions Outside diameter mm Dimension B mm R410A 36 0mm for indoor unit of RP100 125 and 140 R22 mm Gauge manifold Charge hose Gas leak detector Refrigerant recovery equipment Refrigerant cylinder Applied oil Safety charger Charge valve Vacuum pump Flare tool Bender Pipe cutter Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermis tor ...

Page 7: ...red Outdoor side Flared Between the indoor outdoor Height difference Maximum 30 m Piping length 2 to 75 m Service Ref PUHZ SHW112VAA BS UK PUHZ SHW112YAA BS UK OUTDOOR UNIT Power source Phase cycle voltage Single 50 Hz 230 V 3 Phase 50 Hz 400 V Max current A 28 0 13 0 External finish Munsell N8 75 Munsell N2 75 FRONT PANEL Refrigerant control Linear Expansion Valve Compressor Hermetic Model DNK28F...

Page 8: ...or side Flared Between the indoor outdoor Height difference Maximum 30 m Piping length 2 to 40 m Service Ref PUHZ SW100VAA BS UK PUHZ SW100YAA BS UK OUTDOOR UNIT Power source Phase cycle voltage Single 50Hz 230V 3 Phase 50 Hz 400 V Max current A 28 0 13 0 External finish Munsell N8 75 Munsell N2 75 FRONT PANEL Refrigerant control Linear Expansion Valve Compressor Hermetic Model DNB28FBAMT DNB28FBB...

Page 9: ...VAA BS UK PUHZ SW75YAA BS UK 3 0 3 6 4 2 4 8 3 0 PUHZ SW100VAA BS UK PUHZ SW100YAA BS UK 4 2 4 4 4 6 5 2 5 6 5 8 6 0 4 2 Service Ref PUHZ SHW80VAA BS UK PUHZ SHW112VAA BS UK PUHZ SHW80YAA BS UK PUHZ SHW112YAA BS UK PUHZ SW75VAA BS UK PUHZ SW75YAA BS UK Compressor model DNK28FBAMT DNK28FBBMT SNB220FEGMC L1 SNB220FEAMC L1 Winding Resistance Ω U V 0 74 0 94 0 95 1 65 U W 0 74 0 94 0 95 1 65 W V 0 74 ...

Page 10: ...ar 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES Hz COOLING MODE HEATING 49 SPL dB 47 LINE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 90 80 70 60 50 40 30 20 10 OCTAVE BAND SOUND PRESSURE LEVEL dB 0 dB 0 0002 µ bar 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE BAND CENTER FREQUENCIES Hz COOLING M...

Page 11: ...92 44 40 118 58 30 92 25 71 9 2 POWER SUPPLY WIRING HOLE 2X 27 KNOCK OUT REAR TRUNKING HOLE KNOCK OUT REAR PIPING HOLE KNOCK OUT 55 38 58 71 30 55 25 92 65 9 2 SERVICE PANEL TERMINAL CONNECTION LEFT POWER SUPPLY WIRING RIGHT INDOOR OUTDOOR WIRING EARTH TERMINAL 1 2 1 328 1 336 2 802 30 528 1020 363 1050 2 INDICATION OF TERMINAL CONNECTION LOCATION 2 1 REFRIGERANT GAS PIPE CONNECTION FLARE 15 88 5 ...

Page 12: ...51 X52 3 1 21S4 GN SV3 SS WH 3 1 X54 3 1 SV1 CH GY 7 1 MS 3 5 CNF1 WH MF1 TRANS CN4 WH CNDC PK 1 2 3 CNS WH 3 1 F2 F1 F3 F4 CNAC WH 1 3 CNDM WH 1 2 2 1 2 3 4 7 CN2 RD 1 7 63H t 5 1 LEV A WH 3 1 63H YE 3 1 TH33 YE 1 2 t 1 2 t 1 4 t t TH3 WH TH7 6 RD LEV A M 5 5 1 LEV B RD LEV B M 5 5 1 LEV C BU LEV C M 5 2 1 t TH4 TH4 WH 63L 3 1 63L RD LED1 LED2 63HS WH TH33 TH32 BK TH32 TH7 TH6 TH3 63HS 1 3 CNM WH...

Page 13: ...3 1 SV1 CH GY 7 1 MS 3 5 CNF1 WH MF1 63H 5 1 LEV A WH 3 1 63H YE 1 2 t 1 4 t t TH3 WH TH7 6 RD LEV A M 5 5 1 LEV B RD LEV B M 5 2 1 t TH4 TH4 WH 63L 3 1 63L RD LED1 LED2 63HS WH TRANS TH7 TH6 TH3 63HS CN4 WH 1 3 TH8 CNM WH 1 14 CNDC PK 1 2 3 CNS WH 3 1 F2 F1 F3 F4 CNAC WH 1 3 CNDM WH 1 2 2 1 2 3 4 7 CN2 RD CNL BU CNDC PK 3 1 3 1 SW4 SW8 SWP SW1 SW6 SW5 1 3 2 7 2 1 1 1 1 1 3 2 2 7 2 CN7 WH CN6 WH C...

Page 14: ...n for Option Connector Connection for Option Connector Connection for Option Fuse T6 3AL250V SW1 SW4 SW5 SW6 SW7 SW8 SW9 SWP CNDM SV1 CH SV3 SS CNM F1 F2 F3 F4 C B 21S4 X51 X52 3 1 21S4 GN SV3 SS WH 3 1 X54 3 1 SV1 CH GY 7 1 MS 3 5 CNF1 WH MF1 63H t 5 1 LEV A WH 3 1 63H YE 3 1 TH33 YE 1 2 t 1 4 t t TH3 WH TH7 6 RD LEV A M 5 5 1 LEV B RD LEV B M 5 2 1 t TH4 TH4 WH 63L 3 1 63L RD LED1 LED2 63HS WH S...

Page 15: ...Switch Manual Defrost Defect History Record Reset Refrigerant Address Switch Function Switch Controller Circuit Board C B 8 8 1 2 3 4 5 6 7 1 2 3 4 5 6 7 OFF ON 75Y MODEL SW6 2 OFF ON 100Y MODEL SW6 2 1 MODEL SELECT The black square indicates a switch position 2 SW6 1 to 3 Function Switch P B N F t C B 21S4 X51 X52 3 1 21S4 GN SV3 SS WH 3 1 X54 3 1 SV1 CH GY 7 1 MS 3 5 CNF1 WH MF1 63H t 5 1 LEV A ...

Page 16: ...als are NOT electrically insulated by the transformer or other device S1 S2 S3 S1 S2 S3 Warning In case of A control wiring there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line and communication signal line Therefore please turn off the main power supply when servicing And do not touch the S1 S2 S3 terminals whe...

Page 17: ...tion 9 52 3 8 PUHZ SHW80VAA UK PUHZ SHW112VAA UK PUHZ SHW80VAA BS UK PUHZ SHW112VAA BS UK PUHZ SHW80YAA UK PUHZ SHW112YAA UK PUHZ SHW80YAA BS UK PUHZ SHW112YAA BS UK PUHZ SW100VAA UK PUHZ SW100YAA UK PUHZ SW100VAA BS UK PUHZ SW100YAA BS UK REV V CHECK V H H P SW TH4 TH33 COMP CHECK V L Strainer2 100 Strainer1 100 LEV A LEV B Strainer3 100 Strainer4 100 Rec TH8 TH3 P B TH7 HEX P SENSOR Distributer ...

Page 18: ...temperature thermistor For LEV control and for compressor protection TH6 2 phase pipe temperature thermistor Outdoor 2 phase pipe temperature TH7 Ambient temperature thermistor For fan control and for compressor frequency control TH33 Comp surface temperature thermistor For protection Rec Receiver For accumulation of refrigerant HIC Heat interchange circuit For high heating capacity Plate HEX Plat...

Page 19: ...ation cannot be performed Wait until the compressor has been stopped for 3 minutes and then push the pump down SWP switch again 6 Fully close the ball valve on the gas pipe side of the outdoor unit when the pressure gauge on the gauge manifold shows 0 05 to 0 MPa Gauge approx 0 5 to 0 kgf cm and quickly stop the air conditioner Because the unit automatically stops in about 3 minutes when the refri...

Page 20: ...he trouble according to 9 3 TROUBLESHOOTING OF PROBLEMS The trouble is not reoccurring Logged Not logged 1Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring e...

Page 21: ...connection of reactor DCL or ACL Refer to 9 6 TEST POINT DIAGRAM 5 a Check connection of outdoor noise filter circuit board b Replace outdoor noise filter circuit board Refer to 9 6 TEST POINT DIAGRAM 6 Replace outdoor power circuit board 7 Replace controller board When items above are checked but the units cannot be repaired F5 5201 63H connector open Abnormal if 63H connector circuit is open for...

Page 22: ...or outdoor unit connecting wire Total wiring length 80 m including wiring connecting each indoor unit and between indoor and outdoor unit Also check if the connection order of flat cable is S1 S2 S3 3 Check the number of indoor units that are connected to one outdoor unit If EA is detected 4 6 Turn the power off once and on again to check Replace outdoor controller circuit board indoor controller ...

Page 23: ...compressor operation caused by shortage of refrigerant 2 Defective operation of stop valve 3 Defective thermistor 4 Defective outdoor controller board 5 Defective action of linear expansion valve 6 Clogging with foreign objects in refrigerant circuit Note Clogging occur in the parts which become below freezing point when water enters in refrigerant circuit 7 In the case of the unit does not restar...

Page 24: ...it board CN3 2 Defective thermistor 3 Defective outdoor controller circuit board U6 4250 Power module Check abnormality by driving power module in case overcurrent is detected UF or UP error condition 1 Outdoor stop valve is closed 2 Decrease of power supply voltage 3 Looseness disconnection or converse of compressor wiring connection 4 Defective compressor 5 Defective outdoor power circuit board ...

Page 25: ...W Y SHW Y 6 Replace RS SW Y SHW Y 7 Check CN2 wiring SW V SHW V 8 Replace outdoor controller circuit board SW V SHW V 04 Input current sensor error L1 phase open error Decrease in input current through outdoor unit to 0 1A only if operation frequency is more than or equal to 40Hz or compressor current is more than or equal to 6A 1 L1 phase open SW Y SHW Y 2 Disconnection or loose connection betwee...

Page 26: ...or lower c Increase in input current to 50A peak For models equipped with single phase PFC only Not applicable for SW75 100V Y SHW80 112V Y Check for the switch settings for Model Select on the outdoor controller circuit board 20 PFC IGBT error Undervoltage When Compressor is running DC bus voltage stays at 310 V or lower for consecutive 10 seconds SW75 100V SHW80 112V only 1 Incorrect switch sett...

Page 27: ...it of remote controller 4 Defective transmitting receiving circuit of indoor controller board of refrigerant address 0 5 Noise has entered into the transmission wire of remote controller Compressor overcurrent interruption Abnormal if overcurrent DC bus or compressor is detected after compressor starts operating for 30 seconds 1 Stop valve of outdoor unit is closed 2 Decrease of power supply volta...

Page 28: ...eplace outdoor power circuit board 4 Replace outdoor controller circuit board E8 6840 Indoor outdoor unit communication error Signal receiving error Outdoor unit Abnormal if outdoor controller circuit board could not receive anything normally for 3 minutes 1 Contact failure of indoor outdoor unit connecting wire 2 Defective communication circuit of outdoor controller circuit board 3 Defective comm...

Page 29: ... When 10 seconds have passed after the compressor starts operation and the hot adjustment mode has finished the unit is detected as abnormal when condenser evaporator pipe temperature is not in heating range within 20 minutes Note 3 It takes at least 27 minutes to detect abnormality Note 4 It excludes the period of defrosting Detection restarts when defrosting mode is over Heating range 3 Condense...

Page 30: ... appeared but it will be turned off soon 1 After cancelling to select function from the remote controller the remote controller opera tion switch will be not accepted for approx 30 seconds 1 Normal operation 4 Remote controller display works normally and the unit performs cooling operation however the capacity cannot be fully obtained 1 Refrigerant shortage 2 Filter clogging 1 If refrigerant leaks...

Page 31: ...nd the outdoor unit Water or vapour is emitted from the outdoor unit During cooling mode water may form and drip from the cool pipes and joints During heating mode water may form and drip from the heat exchanger of outdoor unit During defrosting mode water on the heat exchanger of outdoor unit evaporates and water vapour may be emitted The operation indicator does not appear in the remote control ...

Page 32: ... after turning on the main power Normal The start up diagnosis will be over in around 2 minutes Miswiring of indoor outdoor connecting wire Breaking of indoor outdoor connecting wire S3 Defective indoor controller board Defective outdoor controller circuit board Refer to Self diagnosis action table in order to solve the trouble In case of communication errors the display of remote controller may n...

Page 33: ...r unit Check if the wiring is bad Check if the fuses are blown The fuses on the outdoor controller circuit board will be blown when the indoor outdoor connecting wire short circuits Bad wiring of the outdoor controller board The fuses on the outdoor controller circuit board are blown Check if miswiring breaking or poor contact is causing this problem Indoor outdoor connecting wire is polarized 3 c...

Page 34: ...roller circuit board Replace the outdoor controller circuit board Normal Only the unit which has the refrigerant address 0 supplies power to the remote controller Set the refrigerant address to 0 In case of the multiple outdoor units control recheck the refrigerant address again Defective indoor power board Replace the indoor power board Defective outdoor power circuit board Replace the outdoor po...

Page 35: ...contact of the remote controller wire Check the voltage of the remote controller wire If it is not between 10 and 16 V DC the indoor controller board must be defective The remote controller wire short circuits Check if the remote controller wire is short circuited Defective indoor controller board Replace the indoor controller board Diagnosis flow Cause Inspection method and troubleshooting Sympto...

Page 36: ...lve LEV A LEV B LEV C 1 Normal Abnormal Open or short Disconnect the connector then measure the resistance with a tester Winding temperature 20 Normal Gray Black Gray Red Gray Yellow Gray Orange Abnormal 46 3 Open or short Refer to the next page Fan motor MF1 Measure the resistance between the terminals with a tester Winding temperature 20 W V U 1435 i 150 9 4 HOW TO CHECK THE PARTS PUHZ SHW80VAA ...

Page 37: ...onnector VDC 280 380 V DC TEST POINT 2 VCC between 5 and 4 of the fan connector VCC 15 V DC Replace the fan motor Replace the outdoor controller board Replace the fan motor Replace outdoor controller board C B and fan motor MF1 Replace outdoor controller board Replace the fan motor Is the voltage normal Is the resistance abnormal Yes Yes No No Fan motor check CNF1 Is there contact failure Did the ...

Page 38: ... 2 B constant 4150 3 Rt 17exp 4150 273 t 323 1 1 Thermistor R120 7 465 k 2 B constant 4057 2 Rt 7 465exp 4057 273 t 393 1 1 Medium temperature thermistor Thermistor Heat sink TH8 20 250 k 30 160 k 40 104 k 50 70 k 60 48 k 70 34 k 80 24 k 90 17 5 k 100 13 0 k 110 9 8 k High temperature thermistor Thermistor Discharge TH4 Thermistor Comp surface TH33 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperatu...

Page 39: ...lve is locked sound can be heard No sound is heard when the pulse number moves from B to A in case coil is burnt out or motor is locked by open phase Sound can be detected by placing the ear against the screw driver handle while putting the screw driver to the linear expansion valve LEV M 1 6 4 4 3 2 1 1 Gray Orange Red Yellow Black 2 3 4 5 Connector LEV A LEV B LEV C 12 V DC Outdoor controller bo...

Page 40: ... pipes can bend due to stress How to attach the coil Hold the lower part of the main body shown as A firmly so that the main body does not move and attach the coil by inserting it downward into the main body Then securely attach the coil stopper to main body At this time be careful that stress is not added to lead wire and main body is not wound by lead wire If the stopper is not firmly attached t...

Page 41: ... Pump down SW8 Pipe replace Wiring replace CNM Connect to A control service tool CN2 Connect to the outdoor power circuit board CN2 1 5 Reception from power circuit board 2 5 Zero cross signal 0 5 V DC 3 4 Not used SHW112 140Y 18 V DC SHW80 112V 6 5 16 V DC 7 5 16 V DC 9 6 TEST POINT DIAGRAM Outdoor controller circuit board PUHZ SHW80VAA UK PUHZ SHW112VAA UK PUHZ SHW80YAA UK PUHZ SHW112YAA UK PUHZ...

Page 42: ...NI LI3 NI 230 V AC input Connect to the terminal block TB1 CNAC2 230 V AC Connect to the outdoor controller circuit board CNAC CNDC Connect to the outdoor controller circuit board CNDC LO1 LO2 LO3 POWER SUPPLY LO1 LO2 LO2 LO3 LO3 LO1 AC400V OUTPUT Connect to the outdoor converter circuit board L1 IN ACL2 ACL3 CNCT Primary current Connect to the outdoor power circuit board CN5 CNL Connect to the AC...

Page 43: ...V DC 7 5 16 V DC CNDC 280 380 V DC 1 3 Connect to the outdoor controller circuit board CNDC U V W Connect to the compres sor MC Voltage among phases 10 180 V AC N1 N L P1 N2 W2 V2 U2 P2 N3 W3 V3 U3 P3 Brief Check of DIP IPM and DIODE MODULE Usually they are in a state of being short circuited if they are broken Measure the resistance in the following points connectors etc If they are short circuit...

Page 44: ...ly printed on the board CN5 Detection of primary current Connect to the outdoor noise filter circuit board CNCT CN4 Connect to the outdoor controller circuit board CN4 CN2 Connect to the outdoor controller circuit board CN2 1 5 Power circuit board Transmitting signal to the controller board 0 5V DC 2 5 Zero cross signal 0 5 V DC 3 4 Not used 6 5 16 V DC 7 5 16 V DC 5 1 2 6 7 CN7 Connect to the out...

Page 45: ... UK PUHZ SW75YAA BS UK PUHZ SW100YAA BS UK L1 A2 L2 A2 L3 A2 Connect to the ACL1 ACL2 ACL3 CN7 Connect to the outdoor power circuit board CN7 CK OU Connect to the CK capacitor L1 IN N IN Connect to the noise filter circuit board LO1 NO L1 A1 Connect to the ACL1 L1 OU L2 OU L3 OU Connect to the outdoor power circuit board TB L1 L2 L3 OCH651 ...

Page 46: ...ctive timing Action by the switch operation Manual defrost 1 Start Normal When compressor is working in heating operation 1 Abnormal history clear Refrigerant address setting When power supply ON Clear Normal off or operating SWP 6 5 4 3 Under suspension Pump down Start Normal SW4 SW8 1 2 1 2 3 No function No function Use of existing pipe Used Not used No function Separate indoor outdoor unit powe...

Page 47: ...ming ON OFF DIP switch SW5 1 No function 2 Power failure automatic recovery 2 Auto recovery No auto recovery When power supply ON 3 4 5 6 No function SW7 3 1 2 3 No function 4 No function 5 No function 6 Defrost setting For high humidity Normal Always SW9 1 No function 2 Function switch Valid Normal Always 3 4 Starting Ambient temp of flash injection PUHZ SHW only SW9 3 SW9 4 Ambient temp OFF OFF ...

Page 48: ...cted by remote controller Remote controller signal receiving error is detected by indoor unit Remote controller transmitting error is detected by indoor unit Serial communication error Communication between outdoor controller board and outdoor power board Check code displayed on remote controller Refer to service manual for indoor unit 1Check if indoor outdoor connecting wire is connected correctl...

Page 49: ...nt Compressor overcurrent breaking Start up locked Compressor overcurrent breaking Abnormality of current sensor P B Abnormality of power module Open short of outdoor thermistors TH4 TH33 Open short of outdoor thermistors TH3 TH32 TH6 TH7 and TH8 1Check if connectors TH3 TH32 TH4 TH33 and TH7 6 on outdoor controller board and connector CN3 on outdoor power board are not disconnected 2Measure resis...

Page 50: ...ssor stops due to the work of protection devices Display Contents to be inspected When power is turned on F3 F5 F9 E8 E9 EA Eb EC EE E0 E7 63L connector red is open 63H connector yellow is open 2 connectors 63H 63L are open Indoor outdoor communication error Signal receiving error Outdoor unit Indoor outdoor communication error Transmitting error Outdoor unit Miswiring of indoor outdoor unit conne...

Page 51: ...and ones digit are displayed by turns Example When 2450 hours 245 10 hours 0 5 s 0 5 s 2 s 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Compressor operating current 0 to 50 Primary LEV opening pulse 0 to 500 Heating LEV B Cooling LEV A 0 to 50 Note Value after the decimal point will be truncated 0 to 500 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns E...

Page 52: ...mber and code 3 to 217 When the temperature is 100 or more the hundreds digit tens digit and ones digit are displayed by turns Example When 130 0 5 s 0 5 s 2 s A Code display Code display 0 to 50 When no error history 0 and are displayed by turns When no error history 0 and are displayed by turns 1 ON 2 3 4 5 6 Thermo ON time 0 to 999 Test run elapsed time 0 to 120 0 to 999 When it is 100 minutes ...

Page 53: ...oling only 0 Single phase 2 3 phase Setting details Defrosting switch Display details 0 Normal 1 For high humidity Example When heat pump 3 phase and defrosting normal are set up 20 is displayed 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Indoor pipe temperature Cond Eva TH5 1 Indoor 1 39 to 88 39 to 88 When the temperature is 0 or less and temperature are displayed by turns 39 to 88 When the temperature is 0 o...

Page 54: ... to 88 When the temperature is 0 or less and temperature are displayed by turns 40 to 200 When the temperature is 0 or less and temperature are displayed by turns When the thermistor detects 100 or more hundreds digit tens digit and ones digit are displayed by turns Outdoor outside temperature TH7 39 to 88 39 to 88 When the temperature is 0 or less and temperature are displayed by turns The black ...

Page 55: ...ror history 3 Oldest Alternate display of abnormal unit number and code When no error history 0 and are displayed by turns 3 Liquid pipe temperature TH3 4 Discharge pipe temperature TH4 6 2 phase pipe temperature TH6 7 Ambient temperature TH7 8 Heat sink temperature TH8 32 Suction pipe temperature TH32 PUHZ SHW only 33 Comp surface temperature TH33 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON...

Page 56: ...rature are displayed by turns Example When 15 C 0 5 s 0 5 s 2 s Outdoor pipe temperature Cond Eva TH6 on error occurring 39 to 88 39 to 88 When the temperature is 0 C or less and temperature are displayed by turns Example When 15 C 0 5 s 0 5 s 2 s Outdoor outside temperature TH7 on error occurring 39 to 88 39 to 88 When the temperature is 0 C or less and temperature are displayed by turns Example ...

Page 57: ...less and temperature are displayed by turns Indoor pipe temperature Cond Eva TH5 3 Indoor 3 39 to 88 39 to 88 When the temperature is 0 C or less and temperature are displayed by turns When there is no indoor unit 00 is displayed 50 1 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Minute 15 1 15 4 Discharge superheat on error occurring SHd 0 to 255 Cooling TH4 T63HS Hea...

Page 58: ...uency control Primary current control Secondary current control 1 2 1 4 8 2 The tens digit The ones digit In this digit the total number of activated control is displayed Preventive control for excessive temp erature rise of discharge temperature Preventive control for excessive temp erature rise of condensing temperature Frosting preventing control Preventive control for excessive temp erature ri...

Page 59: ...re TH6 Outdoor unit Outside air temperature TH7 Outdoor unit Heat sink temperature TH8 Discharge superheat SHd Sub cool SC Compressor Operating frequency Compressor Target operating frequency Outdoor unit Fan output step Outdoor unit Fan 1 speed Only for air conditioners with DC fan motor Outdoor unit Fan 2 speed Only for air conditioners with DC fan motor LEV A opening LEV B opening Primary curre...

Page 60: ... 1 latest Outdoor unit Error postponement history 2 previous Outdoor unit Error postponement history 3 last but one Examples Ver 5 01 Auxiliary information displayed after version information Examples Ver 5 01 A000 Displays postponement code is displayed if no postponement code is present Displays postponement code is displayed if no postponement code is present Displays postponement code is displ...

Page 61: ...display TH3 TH6 TH7 TH8 Operation mode at time of error Compressor Operating current at time of error Compressor Accumulated operating time at time of error Compressor Number of operation times at time of error Discharge temperature at time of error Outdoorunit Liquidpipe1temperature TH3 attimeoferror Outdoor unit 2 phase pipe temperature TH6 at time of error Outdoor unit Outside air temperature T...

Page 62: ...AN C COOL DRY H HEAT d DEFROST Relay output state Display Power currently Compressor Four way valve Solenoid valve supplied to compressor Outdoor unit Control state Request code 51 Data display State 0 0 0 0 Normal 0 0 0 1 Preparingforheatoperation 0 0 0 2 Defrost Compressor Frequency control state Request code 52 Data display 0 0 Frequency control state 2 Frequency control state 1 Frequency contr...

Page 63: ...N ON ON ON ON ON ON ON ON ON ON Actuator output state 2 Display 52C SV2 SS 0 1 2 3 4 5 6 7 ON ON ON ON ON ON ON ON ON ON ON ON Error content U9 Request code 55 Data display Error content 1 Error content 2 0 0 Error content 1 Detected Display Overvoltage Undervoltage L1 phase Power synchronizing error error open error signal error 0 1 2 3 4 5 6 7 8 9 A b C d E F Error content 2 Detected Display Con...

Page 64: ... Display Defrost mode 0 Standard 1 For high humidity Setting information 2 Display Single Heat pump 3 phase cooling only 0 Single phase Heat pump 1 Cooling only 2 3 phase Heat pump 3 Cooling only Outdoor unit Capacity setting display Request code 70 Data display Capacity 10 50 9 35 11 60 14 71 20 100 25 125 28 140 40 200 50 250 OCH651 ...

Page 65: ...V B RD and LEV C BU 1 from the controller circuit board Symbols on the board Fan motor CNF1 Thermistor Liquid TH3 Thermistor Discharge TH4 Thermistor Ambient 2 Phase Pipe TH7 6 Thermistor Suction TH32 1 Thermistor Comp Surface TH33 High pressure switch 63H Low pressure switch 63L High pressure sensor 63HS 4 way valve 21S4 LEV LEV A LEV B LEV C 1 7 Disconnect the connectors ACL1 RD ACL2 WH and ACL3...

Page 66: ...the cont base front The cont base front is fixed to the electrical parts box with a hook on the left side 5 Disconnect all the connectors on the noise filter circuit board 6 To remove the noise filter circuit board release it from the support 7 Remove the cont base fixing screws 3 for front 4 10 to remove the cont base The cont base is fixed to the electrical parts box with a hook on the left side...

Page 67: ...r rear 5 12 to remove the sensor holder 7 Pull out the thermistor Ambient TH7 from sensor holder Note 1 When replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Refer to procedure No 6 to remove the thermistor 2 phase pipe TH6 Photo 7 8 Removing the thermistor Liquid TH3 1 Remove the service panel See Photo 1 2 Remove the top panel...

Page 68: ...the 4 way valve coil 21S4 LEV coil LEV A LEV B LEV C 1 lead wire for high pressure switch low pressure switch and high pressure sensor 1 Remove the electrical parts box See Photo 3 1 2 Loosen the bands for the lead wire Removing the 4 way valve coil 3 Remove the 4 way valve coil fixing screw 1 for right M5 to remove the 4 way valve coil 4 Slide the 4 way valve coil rightward to remove it Removing ...

Page 69: ...e tem perature below then braze the pipes so that the inside of pipes are not oxidized 4 way valve 120 C or more LEV 120 C or more High pressure switch 100 C or more Low pressure switch 100 C or more High pressure sensor 100 C or more 1 For SHW model only Photo 11 SHW model Photo 12 12 Removing the compressor MC 1 Remove the service panel See Photo 1 2 Recover refrigerant 3 Remove the electrical p...

Page 70: ...r refrigerant without spreading it in the air Photo 13 14 Removing the reactor ACL1 ACL2 ACL3 Y model only 1 Remove the electrical parts box See Photo 3 1 2 Remove the reactor assy fixing screws 8 for right 4 10 then slide the reactor assy upward to remove it 3 Remove the reactor fixing screws 4 for front 4 10 to remove the reactor on the reactor assy Note 1 Pay extra attention when handling the r...

Page 71: ...ectors CNF1 WH TH3 WH TH4 WH TH7 6 RD TH33 YE 63H YE 63HS WH 21S4 GN LEV A WH and LEV B RD from the con troller circuit board Symbols on the board Fan motor CNF1 Thermistor Liquid TH3 Thermistor Discharge TH4 Thermistor Ambient 2 Phase Pipe TH7 6 Thermistor Comp Surface TH33 High pressure switch 63H High pressure sensor 63HS 4 way valve 21S4 LEV LEV A LEV B 7 Disconnect the connectors ACL1 RD ACL2...

Page 72: ...e cont base front The cont base front is fixed to the electrical parts box with a hook on the left side 5 Disconnect all the connectors on the noise filter circuit board 6 To remove the noise filter circuit board release it from the support 7 Remove the cont base fixing screws 3 for front 4 10 to remove the cont base The cont base is fixed to the electrical parts box with a hook on the left side 8...

Page 73: ...r rear 5 12 to remove the sensor holder 7 Pull out the thermistor Ambient TH7 from sensor holder Note 1 When replacing thermistor Ambient TH7 replace it together with thermistor 2 phase pipe TH6 since they are combined together Refer to procedure No 6 to remove the thermistor 2 phase pipe TH6 Photo 7 8 Removing the thermistor Liquid TH3 1 Remove the service panel See Photo 1 2 Remove the top panel...

Page 74: ...ay valve LEV LEV A LEV B high pressure switch and high pressure sensor 1 Remove the service panel See Photo 1 2 Recover refrigerant 3 Remove the electrical parts box See Photo 3 1 4 Remove the valve bed fixing screws 3 for front 5 12 and the ball valve and stop valve fixing screws 4 for fornt 5 x 16 to remove the valve bed 5 Remove the side panel R See Photo 1 Removing the 4 way valve 6 Remove the...

Page 75: ...gerant without spreading it in the air 2 Tighten the nuts of compressor with a torque of 4 0 4 N m Photo 11 1 13 Removing the receiver 1 Remove the service panel See Photo 1 2 Recover refrigerant 3 Remove the piping 4 Remove the receiver leg fixing screws 2 for top 4 10 then slide the receiver upward to remove it The receiver is fixed to the base with a hook on the bottom Note 1 Recover refrigeran...

Page 76: ...ICE TOKYO BUILDING 2 7 3 MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2017 MITSUBISHI ELECTRIC CORPORATION Published May 2017 No OCH651 Made in Japan Specifications are subject to change without notice ...

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Mitsubishi Electric PUHZ-SHW112VAA, Service Manual

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