Mitsubishi Electric ecodan PUHZ-W50VHA2 Service Manual Download Page 10

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WIRING DIAGRAM

PUHZ-W50VHA2

PUHZ-W50VHA2R1

PUHZ-W50VHA2-BS PUHZ-W50VHA2R1-BS

TB1

MC
MF1
21S4
63H

TH3
TH4
TH6
TH7
TH8

LEV-A, LEV-B
ACL

Terminal Block

<Power Supply, Indoor/Outdoor>
Motor for Compressor
Fan Motor
Solenoid Valve(4-Way Valve)
High Pressure Switch

63HS

High Pressure Sensor
Thermistor<Liquid>
Thermistor<Discharge>
Thermistor<Plate HEX Liquid>
Thermistor<Ambient>
Thermistor<Heat Sink>

TH34

Thermistor<Comp. Surface>

TH32

Thermistor<Inlet Water>

Linear Expansion Valve
Reactor

CY1, CY2

Capacitor

Power Circuit Board

P. B.

Controller Circuit Board

Switch <Manual Defrost, Defect History

Record Reset, Function Switch>

Switch<Function Switch, Model Select>

Switch<Function Switch>

SW1

Connector<Connection for Option>
Connector<Connection for Option>

CNDM

SW6

SW8

Switch<Function Switch>

SW7

SV1/CH

Connector<Connection for Option>

SV3/SS

C. B.

SYMBOL

NAME

SYMBOL

NAME

Switch<Model Select>

Switch<Function Switch>

SW5

Switch<Function Switch>

SW2

Switch<Function Switch>

SW4

SW9

Fuse<T10AL250V>

F1, F2

Fuse<T6.3AL250V>

F3, F4

TBL4

TBL2

S/N1

R/L1

CNAC2

(RD)

CNAC1

(WH)

CNDC

(PK)

MF1

1 2 2

CNF1

(WH)

TRANS

CNDC

(PK)

TH7/6

(RD)

TH3

(WH)

TH4

(WH)

TH7 TH6 TH3 TH4

1 2

TH32

(BK)

TH32

2 1

TH34

(RD)

TH34

63HS

(WH)

CNS

(WH)

63H

(YE)

63H

C. B.

P. B.

LED3

CN2

(RD)

1 2

CNAC

(WH)

CN4

(WH)

21S4

(GN)

SV3/SS

(WH)

X52

SV1/CH

(GY)

X54

X51

21S4

IC710

CN2

(RD)

TH8

LEV-A

(WH)

LEV-A

CNDM

(WH)

1 3

ACL

Q600

DB2

LEV-B

(RD)

LEV-B

1 2

CN4

(WH)

1 2

CN6

(WH)

GNYE

TB1

CY1

CY2

S1 S2 S3

POWER SUPPLY

~/N 230V 50Hz

TO INDOOR UNIT

SW6

SW1

SW8

SW2

SW7

SW5

SW4

SW9

DB1

DB3

1 2 3 4 5 6 7 8

MODEL

SW6

1 MODEL SELECT

SW5-6

OFF

50V

OFF

1 2 3 4 5 6

2 SW5 -1 to 5 : Function Switch

The black square ( ) indicates a switch position.

OCH605A

Summary of Contents for ecodan PUHZ-W50VHA2

Page 1: ...l describes service data of outdoor unit only RoHS compliant products have G mark on the spec name plate R410A PARTS CATALOG OCB605 SPLIT TYPE AIR TO WATER HEAT PUMP No OCH605 REVISED EDITION A November 2015 Model Name PUHZ W50VHA2 Salt proof model PUHZ W50VHA2 BS Service Ref PUHZ W50VHA2 PUHZ W50VHA2R1 PUHZ W50VHA2 BS PUHZ W50VHA2R1 BS Please void OCH605 Revision Added PUHZ W50VHA2R1 and PUHZ W50...

Page 2: ...L CHANGES Service ref have been changed as follows PUHZ W50VHA2 PUHZ W50VHA2R1 PUHZ W50VHA2 BS PUHZ W50VHA2R1 BS 1 The installation direction of LEV B assy has been changed to reduce high frequency noise OCH605A ...

Page 3: ...erant can cause deterioration of refrigerant oil etc Use a vacuum pump with a reverse flow check valve Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc Use the following tools specifically designed for use with R410A refrigerant The following tools are necessary to use R410A refrigerant Handle tools with care If dirt dust or moisture ente...

Page 4: ... charged from liquid phase Gravimeter Unit 3 Service tools Use the below service tools as exclusive tools for R410A refrigerant 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 of 5 09 MPa G or over 3 Electronic scale 4 Gas leak detecto...

Page 5: ...er Welder and nitrogen gas cylinder Refrigerant charging scale Vacuum gauge or thermis tor vacuum gauge and vacuum valve Charging cylinder Air purge refrigerant charge and operation check Gas leak check Refrigerant recovery Refrigerant charge Prevent compressor malfunction when charging refrigerant by spraying liquid refrigerant Prevent gas from blowing out when detaching charge hose Vacuum drying...

Page 6: ...eating A7 W35 39 mm A Cooling A35 W7 m m 2 8 6 2 B A t n e r r u c x a M m m 3 9 W A e z i s r e k a e r B m m 5 2 3 H g n i s a c r e t u O m m 2 4 5 D h s i n i f l a n r e t x E s e t a l p 28 l o r t n o c t n a r e g i r f e R Compressor Model Motor output kW Start type Protection devices Maximum outlet water temperature Oil Model L W r e t a e h e s a c k n a r C Heat exchanger Air Water Fan...

Page 7: ... 0 9 0 11 0 13 0 15 0 17 0 19 0 Water flow rate L min Return water temp Applicable Models PUHZ W50VHA2 PUHZ W50VHA2R1 PUHZ W50VHA2 BS PUHZ W50VHA2R1 BS Available range Cooling Table 4 7 0 6 0 8 0 9 0 10 0 11 0 12 0 13 0 14 0 Water flow rate L min 5 0 7 0 9 0 11 0 13 0 15 0 17 0 19 0 Return water temp Applicable Models PUHZ W50VHA2 PUHZ W50VHA2R1 PUHZ W50VHA2 BS PUHZ W50VHA2R1 BS Available range OC...

Page 8: ...ge temperature ºC 69 68 Condensing temperature ºC 43 37 Suction temperature ºC 6 6 Water conditions Flow volume L min 12 9 14 3 Outlet water temperature ºC 7 35 Outdoor conditions Intake air temperature D B ºC 35 7 W B ºC 24 6 The unit of pressure has been changed to MPa based on international SI system The conversion factor is 1 MPa 10 2 kgf cm2 NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 90 80 70 60 50 ...

Page 9: ...holes Foundation Bolt M10 Installation Feet 53 417 370 28 175 175 600 19 330 30 Drain hole 5 33 30 81 219 220 145 145 145 Detail ISO 228 1 G1 B 85 269 24 Foundation bolt height Please secure the unit firmly with 4 foundation M10 bolts Bolts and washers must be purchased locally Service space Dimensions of space needed for service access are shown in the below diagram FREE O v e r 3 0 0 m m O v e r...

Page 10: ...ection for Option SV3 SS C B SYMBOL NAME SYMBOL NAME Switch Model Select Switch Function Switch SW5 Switch Function Switch SW2 Switch Function Switch SW4 SW9 Fuse T10AL250V F1 F2 Fuse T6 3AL250V F3 F4 TBL4 TBL2 S N1 R L1 CNAC2 RD 3 E3 1 CNAC1 WH 3 1 BK E4 BK EI BK 1 CNDC PK 3 MS 3 MF1 1 3 1 7 3 4 1 1 1 2 2 1 7 1 CNF1 WH TRANS CNDC PK TH7 6 RD TH3 WH TH4 WH TH7 TH6 TH3 TH4 1 2 TH32 BK TH32 2 1 TH34...

Page 11: ...oor unit please use 3 pole type S1 S2 S3 S1 S2 S3 A Control Outdoor Unit 3 poles isolator Power supply Isolator Interface unit Flow temp controller 0V W5 l e d o m t i n u r o o d t u O Outdoor unit power supply Wiring Wire No size mm Circuit rating Outdoor unit L N single Outdoor unit L1 N L2 N L3 N 3phase Interface unit Flow temp controller Outdoor unit S1 S2 3 Interface unit Flow temp controlle...

Page 12: ... LEV Heating Primary LEV Cooling Secondary LEV For freeze protection and for compressor frequency control Heating Evaporating temperature Cooling Sub cool liquid temperature For LEV control and for compressor protection Heating Sub cool liquid temperature Cooling Evaporating temperature For fan control and for compressor frequency control For power board protection For compressor protection For ac...

Page 13: ...st run Especially items to secure safety Unit conditions at service Check code Actions to be taken for service summary The trouble is reoccurring Displayed Judge what is wrong and take a corrective action according to 8 3 SELF DIAGNOSIS ACTION TABLE Not displayed Conduct troubleshooting and ascertain the cause of the trouble The trouble is not reoccurring Logged 1 Consider the temporary defects su...

Page 14: ...rminal block TB1 b Connection of terminal on outdoor power circuit board Check connection of the connector R or S Refer to 8 6 TEST POINT DIAGRAM 3 Check connection of the connector CNDC on the outdoor controller circuit board Check connection of the connector CNDC on the outdoor power circuit board 4 Check connection of TBL2 and TBL4 on the outdoor power circuit board Refer to 8 6 TEST POINT DIAG...

Page 15: ...or unit Also check if the connection order of flat cable is S1 S2 S3 3 Check the number of Interface unit Flow temp controller that is connected to 1 out door unit If EA is detected 4 5 Turn the power off once and on again to check Replace outdoor controller circuit board or Interface Flow temp controller board if abnormality occurs again 6 Check transmission path and remove the cause Note The des...

Page 16: ... if during defrosting discharge temperature thermistor TH4 exceeds 110 continuously for 30 minutes High comp surface temperature Abnormal if comp surface temperature TH34 exceeds 125 In the case of high comp surface tem perature error compressor does not restart unless the thermistor TH34 becomes less than 95 1 Overheated compressor oper ation caused by insufficient refrigerant 2 Defective thermis...

Page 17: ...eness disconnection or reverse of compressor wiring connection 4 Defective compressor 1 Replace outdoor power circuit board 2 Check facility of power supply 3 Correct the wiring U V W phase to compressor Refer to 8 6 TEST POINT DIAGRAM Outdoor power circuit board 4 Check compressor referring to 8 4 HOW TO CHECK THE PARTS U7 Too low superheat due to low discharge temperature Abnormal if discharge s...

Page 18: ...r controller circuit board 1 Replace outdoor power circuit board 2 Replace outdoor controller circuit board 08 Abnormal power synchronous signal No input of power synchronous signal to power circuit board Power synchronous signal of 44 Hz or less or 65 Hz or more is detected on power circuit board 1 Distortion of power source voltage noise superimposi tion 2 Disconnection or loose con nection of e...

Page 19: ...ormal if current sensor detects 1 0 A to 1 0 A during compressor operation This error is ignored during test run 1 Disconnection of compressor wiring 2 Defective circuit of current sensor on outdoor power circuit board 3 Decrease of power supply voltage 4 Leakage or shortage of refrigerant 1 Correct the wiring U V W phase to compres sor Refer to 8 6 TEST POINT DIAGRAM Outdoor power circuit board 2...

Page 20: ... error E3 signal receiving error E5 1 Abnormal if remote controller could not find blank of transmission path for 6 sec onds and could not transmit Check code E3 2 When remote controller receives the transmitted data same time and com pares these data Abnormal if the data is judged to be different for 30 continuous times Check code E3 1 Abnormal if Interface Flow temp control ler board could not f...

Page 21: ...etween outdoor controller circuit board and out door power circuit board is defective 1 Wire disconnection or contact failure of connector CN2 between the outdoor controller circuit board and the outdoor power circuit board 2 Wire disconnection or contact failure of connector CN4 between the outdoor controller circuit board and the outdoor power circuit board 3 Defective communication circuit of o...

Page 22: ...emperature display is indicated by setting SW2 of outdoor controller circuit board Check the holder of thermistor UE Abnormal pressure of pressure sensor 63HS Abnormal if pressure sensor 63HS detects 0 1 MPa or less Detection is inoperative for 3 minutes after compressor starting and 3 minutes after and during defrosting 1 Disconnection or contact failure of connector 63HS on the outdoor controlle...

Page 23: ...ce between the terminals with a tester At the ambient temperature of 20 Solenoid valve coil 4 way valve 21S4 Compressor MC Normal Abnormal Open or short Refer to 8 4 1 Check method of DC fan motor fan motor outdoor controller circuit board Fan motor MF1 2350 170 Measure the resistance between the terminals with a tester Winding temperature 20 Normal W V U Linear expansion valve LEV A LEV B Disconn...

Page 24: ...e the outdoor controller circuit board Replace the outdoor controller circuit board Replace fan motor Replace the fan motor Check fan motor rotation Check fan motor rotation Is the voltage normal Is the fuse normal Is there contact failure Check fuse F5 on outdoor controller circuit board Yes Yes No No Yes Power supply check Measure the voltage on the outdoor controller circuit Remove the connecto...

Page 25: ... 465exp 4057 273 t 393 1 1 Medium temperature thermistor Thermistor Heat Sink TH8 High temperature thermistors Thermistor Discharge TH4 Thermistor Comp Surface TH34 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 200 150 100 50 0 25 50 75 100 125 Temperature Resistance k 500 400 300 200 100 0 25 50 75 100 120 Temperature Resistance k 1 1 0 15 k 10 9 6 k 20 6 3 k 25 5 2 k 30 4 3 k ...

Page 26: ... 273 t 273 1 0 10 20 30 40 50 20 10 0 10 20 30 40 50 Temperature Resistance k 1 0 5 2 5 5 2 5 4 5 Vout V PRESSURE MPa 3 2 1 WHT BLU BLK SENSOR 5 V DC GND 63HS Vout MICRO PROCESSOR MULTI CONTROLLER BOARD 3 1 5 V DC 2 1 Output Vout DC HIGH PRESSURE SENSOR 0 15 k 10 9 6 k 20 6 3 k 25 5 2 k 30 4 3 k 40 3 0 k OCH605A ...

Page 27: ...oves from to 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 1 2 Gray Orange Red Yellow Black 3 4 5 6 Connector LEV A LEV B LEV C 12 V DC Outdoor controller board Drive circuit 3 2 5 4 LEV M 1 6 1 Gray Orange Red Yellow Black 3 4 5 2 Connector L...

Page 28: ...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 stop per 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 29: ...topped 7 5 V DC When operated 0 15 V pulse 21S4 4 way valve 63H High pressure switch SV1 Connection for option Drain hose heater output CN4 Transmission to out door power circuit board CN4 SW6 Model select SW5 Function switch SW1 Manual defrost detect history record reset CNDM 1 2 Input of low level sound priority mode TH4 Thermistor Discharge TH7 6 Thermistor Ambient Plate HEX Liquid CNDC 280 380...

Page 30: ...ect to the outdoor controller circuit board CN2 1 5 Outdoor power circuit board Transmitting sig nal to the outdoor controller circuit board 0 5 V DC 2 5 Zero cross signal 0 5 V DC 3 4 15 V DC 6 5 16 V DC 7 5 16 V DC 1 2 6 7 5 U V W Connect to the compressor MC Voltage among phases 10 180 V AC CN4 Connect to the outdoor controller circuit board CN4 E4 Connect to the earth EI E3 Connect to the eart...

Page 31: ...erated U2 Abnormal high discharge temperature shortage of refrigerant U3 Open short circuit of discharging thermistor TH4 and TH34 U4 Open short of outdoor unit thermistors TH3 TH32 TH6 TH7 and TH8 U5 Abnormal temperature of heat sink U6 Abnormality of power module U7 Abnormality of superheat due to low discharge temperature U8 Abnormality in outdoor fan motor U9 Voltage fault Input current sensor...

Page 32: ...digit 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 running current 0 to 50 LEV A opening pulse 0 to 500 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 Example When 150 pulse 0 5 s 0 ...

Page 33: ...reds 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 Compressor operation duration 0 to 999 0 to 999 When it is 100 minutes or more the hundreds digit tens digit and ones digit are displayed by turns Example...

Page 34: ...H8 40 to 200 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 1 ON 2 3 4 5 6 C Discharge superheat SHd 0 to 255 Cooling and Heating SHd TH4 T63HS 0 to 255 When the SHd is 100 C or more hundreds digit tens digit and ones digit are displayed by turns 1 ON 2 3 4 5 ...

Page 35: ...digit are displayed by turns Code display Direct current bus voltage 150 to 400 150 to 400 When it is 100 V or more hundreds digit tens digit and ones digit are displayed by turns V 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 1 ON 2 3 4 5 6 Code display Deferred error history 2 of outdoor unit Deferred check code display Blinking being deferred Lighting deferment is cancelled 00 is displayed in case of no defer...

Page 36: ...ing pulse when error occurred 0 to 500 0 to 500 When it is 100 pulse or more hundreds digit tens digit and ones digit are displayed by turns Example When 130 pulse 0 5 s 0 5 s 2 s Water inlet temperature TH32 when error occurred 0 to 100 0 to 100 30 1 1 ON 2 3 4 5 6 Plate HEX liquid pipe temperature TH6 when error occurred 39 to 88 39 to 88 When the temperature is 0 C or less and temperature are d...

Page 37: ...nes digit are displayed by turns Example When 415 minutes 0 5 s 0 5 s 2 s Maximum frequency when error occurred 0 to 150 0 to 150 When it is 100 Hz or more hundreds digit tens digit and ones digit are displayed by turns Example When 105 Hz 0 5 s 0 5 s 2 s Requested capacity step when error occurred 0 to 7 0 to 7 Step 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 Hz 15 1 15 4 1...

Page 38: ... are displayed by turns Example When 130 0 5 s 0 5 s 2 s 1 ON 2 3 4 5 6 1 30 The black square indicates a switch position Normal Overvoltage error Undervoltage error Input current sensor error Abnormal power synchronous signal PFC error Overvoltage overcurrent Display examples for multiple errors Overvoltage 01 Undervoltage 02 03 Undervoltage 02 Power sync signal error 08 0A Description Display 00...

Page 39: ...A 0 0 1 1 0 1 LEV A opening pulse LEV A 0 0 0 1 0 0 LEV B opening pulse LEV B 1 0 0 0 1 0 LEV B opening pulse LEV B 0 1 0 0 0 1 Ambient temp TH7 1 0 0 0 1 1 Water inlet temp TH32 0 0 0 0 1 1 Requested capacity step Q STEP 1 0 1 1 1 1 Heat sink temp TH8 0 1 0 0 1 1 Comp surface temp TH33 0 1 1 1 1 1 Calculated max frequency Hz 0 1 1 0 1 1 Sub Cool SC 0 0 1 0 1 1 Heat sink temp TH8 0 1 1 1 1 0 Compr...

Page 40: ...nction OFF Always 2 No function OFF 3 6 No function OFF SW8 1 Mode selection Energy saving mode Powerful mode OFF Always 2 Max current setting Model Max current OFF ON W50VHA2 13 A 11 A OFF When power supply ON 3 Separate Interface Flow temp controller outdoor unit power supplies Separate power supply Outdoor unit power supply OFF Power supply connection method selection When power supply ON SW9 1...

Page 41: ...X pipe temperature 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 openi...

Page 42: ...ory 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 di...

Page 43: ...TH8 TH32 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 Water inlet temperature TH32 at time of error Plate HEX liquid pipe temperature TH6 at time of error Outdoor uni...

Page 44: ... FAN C COOL DRY H HEAT d DEFROST Relay output state Display Power currently Compressor 4 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 contro...

Page 45: ...V2 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 Converter Fo PAM error error 0 1 2 3 Compressor is warming up Outdoor un...

Page 46: ...ting information 1 Setting information 2 0 0 Setting information 1 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 OCH605A ...

Page 47: ...all the following connectors from controller circuit board CNF1 WH LEV A WH LEV B RD TH3 WH TH4 WH TH7 6 RD TH32 BK TH34 RD 63HS WH 63H YE and 21S4 GN Pull out the disconnected wire from the electrical parts box Diagram symbol in the connector housing Fan motor CNF1 Linear Expansion Valve LEV A and LEV B Thermistor Liquid TH3 Thermistor Discharge TH4 Thermistor Ambient Plate HEX Liquid TH7 6 Therm...

Page 48: ...the top panel See Photo 1 3 Remove 2 screws 5 12 and remove the cover panel front See Photo 1 4 Remove 3 valve bed fixing screws 4 10 and remove the valve bed Remove 3 side panel R fixing screws 5 12 and remove the side panel R See Photo 4 5 Disconnect the connectors TH3 WH TH4 WH and TH34 WH on the controller circuit board 6 Loosen the clamps for the lead wire 7 Pull out the thermistor Liquid TH3...

Page 49: ...ver refrigerant 8 Remove the welded part of linear expansion valve Refer to the notes below Photo 9 Solenoid valve 4 way 21S4 4 way valve Linear Expansion Valve LEV A High pressure switch 11 Removing the high pressure switch 63H 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 4 4 Remove 3 side panel R fixing screws 5 12 in the r...

Page 50: ...ts box See Photo 4 5 Remove 3 screws 4 10 and remove the valve bed See Photo 4 6 Remove 3 screws 5 12 in the rear of the unit and remove the side panel R See Photo 4 7 Recover the refrigerant 8 Remove 2 welded pipes of receiver 9 Remove 2 receiver leg fixing screws 4 10 then remove the receiver Note 1 Recover refrigerant without spreading it in the air 15 Removing the plate heat exchanger 1 Remove...

Page 51: ... 2 Remove 4 reactor fixing screws 4 16 and remove the reactor Note The reactor is attached to the rear of the electrical parts box 19 Removing the thermistor Heat Sink TH8 1 Remove CN2 CN4 CNDC CNAC1 CNAC2 lead wire con nectors from controller circuit board C B 2 Remove 2 screws 4 10 for fixing the C B plate and detach the C B plate from the electrical parts box 3 Remove all lead wire connectors o...

Page 52: ...llowing connectors from controller circuit board CNF1 WH LEV A WH LEV B RD TH3 WH TH4 WH TH7 6 RD TH32 BK TH34 RD 63HS WH 63H YE and 21S4 GN Pull out the disconnected wire from the electrical parts box Diagram symbol in the connector housing Fan motor CNF1 Linear Expansion Valve LEV A and LEV B Thermistor Liquid TH3 Thermistor Discharge TH4 Thermistor Ambient Plate HEX Liquid TH7 6 Thermistor Inle...

Page 53: ...the top panel See Photo 1 3 Remove 2 screws 5 12 and remove the cover panel front See Photo 1 4 Remove 3 valve bed fixing screws 4 10 and remove the valve bed Remove 3 side panel R fixing screws 5 12 and remove the side panel R See Photo 4 5 Disconnect the connectors TH3 WH TH4 WH and TH34 WH on the controller circuit board 6 Loosen the clamps for the lead wire 7 Pull out the thermistor Liquid TH3...

Page 54: ...ver refrigerant 8 Remove the welded part of linear expansion valve Refer to the notes below Photo 9 Solenoid valve 4 way 21S4 4 way valve Linear Expansion Valve LEV A High pressure switch 11 Removing the high pressure switch 63H 1 Remove the service panel See Photo 1 2 Remove the top panel See Photo 1 3 Remove the electrical parts box See Photo 4 4 Remove 3 side panel R fixing screws 5 12 in the r...

Page 55: ...ts box See Photo 4 5 Remove 3 screws 4 10 and remove the valve bed See Photo 4 6 Remove 3 screws 5 12 in the rear of the unit and remove the side panel R See Photo 4 7 Recover the refrigerant 8 Remove 2 welded pipes of receiver 9 Remove 2 receiver leg fixing screws 4 10 then remove the receiver Note 1 Recover refrigerant without spreading it in the air 15 Removing the plate heat exchanger 1 Remove...

Page 56: ... 2 Remove 4 reactor fixing screws 4 16 and remove the reactor Note The reactor is attached to the rear of the electrical parts box 19 Removing the thermistor Heat Sink TH8 1 Remove CN2 CN4 CNDC CNAC1 CNAC2 lead wire con nectors from controller circuit board C B 2 Remove 2 screws 4 10 for fixing the C B plate and detach the C B plate from the electrical parts box 3 Remove all lead wire connectors o...

Page 57: ...57 OCH605A ...

Page 58: ...OKYO 100 8310 JAPAN Copyright 2015 MITSUBISHI ELECTRIC CORPORATION Distributed in Nov 2015 No OCH605 REVISED EDITION A Distributed in Jul 2015 No OCH605 Made in Japan New publication effective Nov 2015 Specifications are subject to change without notice ...

Page 59: ... Videos For Homeowners Ecodan Homeowner Leaflet Ecodan Hybrid Applications Brochure Ecodan PUHZ FTC4 Databook Ecodan PUHZ H W Installation Manual BH79D532H03 Ecodan PUHZ H W 50 140 V Y HA Installation Manual BH79D532H05 Ecodan PUHZ HW140VHA2 BS PUHZ HW140YHA2 BS Parts Catalogue OCB439P Ecodan PUHZ W50VHA BS Declaration of Conformity Ecodan PUHZ W50VHA BS Service Manual OCH605A Hebridean Housing Pa...

Page 60: ...Ecodan FTC5 Databook M P0729 ...

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Mitsubishi Electric ecodan PUHZ-W50VHA2, Service Manual

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