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Fujitsu WPYA050LE, Service Manual, Page: 11 / 18

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Fujitsu WPYA050LE Service Manual Download Page 11

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HOW TO DETACH PCB(CONTROLLER)

TROUBLESHOOTING GUIDE

5.  Unscrew (3pcs). [See picture 5-1,5-2,5-3] 

6.  Disconnect lead wire for FAN MOTOR from CASE OF PCB. [See picture 6]

7.  Disconnect 3 lead wires (black, white, red) from TERMINAL BLOCK. Unscrew the gray lead wire. [See picture 7]

8.  Disconnect all lead wires from PCB(CONTROLLER) and move CASE OF PCB forward. [See picture 8]

[picture 6]

[picture 8]

[picture 7]

[picture 5-1]

[picture 5-2]

[picture 5-3]

lead wire for 

FAN MOTOR

TERMINAL 

BLOCK

3 lead wires 

(black, white, red)

gray lead wire

CASE OF PCB

Summary of Contents for WPYA050LE

Page 1: ...IR TO WATER HEAT PUMP MONOBLOC type CONTENTS SPECIFICATION 2 FUNCTION 3 OPERATION DETAILS 4 TROBLESHOOTING GUIDE 5 PARTS LIST 14 ELECTRIC CIRCUIT DIAGRAM 16 EXPLODED VIEW 17 Models Outdoor unit WPYA050LE ...

Page 2: ...unning Current MAX A Cooling 4 5 6 6 Heating 6 4 10 9 Water Pipe Size Out R3 4 20A Return R3 4 20A Power Cord Number of core wire core wire 1 5 2 0mm2 Dimensions Height mm 675 Width mm 825 Depth mm 300 Net Weight kg 50 Air Circulation Type Propeller Fan Motor Type DC brushless 8 pole Rated Output W 30 Heat Exchanger Plate fin configuration forced draft 16 9 FPI Refrigerant Control Device Expansion...

Page 3: ...with less electricity consumption than normal air to water heat pump Electricity consumption Defrosting operation is controlled by the temperature of outdoor heat exchanger sensed by the thermistor Defrost control Anti freeze operation automatically starts when the outdoor temperature is lower than 2 C Anti freezing control for the circulation water Restarting is inhibited for approximately 3 minu...

Page 4: ...the start of heating operation or after the completion of previous defrosting operation b The temperature of the outdoor heat exchanger stays lower than 1 5 C 2 continuously for two minutes Defrosting operating is called off if either of the following conditions is met a The temperature of outdoor heat exchanger rises to 15 C while 4 way valve is ON b 12 minutes has passed since compressor turned ...

Page 5: ...control box assembly high voltage Make the capacitor discharge enough when servicing Otherwise will be struck by electric ity Never remodel appliance Use designated parts or accessories to avoid accidents In case of gas leakage not only refill the required amount of the refrigerant gas but also find out the gas leakage point and mend it If the service work has to be suspended before mending the le...

Page 6: ... power supply voltage 230V MOMENTARY STOP OF POWER IN CASE OF LIGHTNING restart operation PCB CONTROLLER operate without the junction connector of compressor lead wire if the same error code appears again PCB CONTROLLER should be replaced COMPRESSOR other than described above COMPRESSOR should be replaced A4 protective action against excess current AC current detection UNREASONABLE OPERATION UNDER...

Page 7: ...by tester see table 3 if the sensor is faulty it should be replaced E5 Return circulating water temp sensor Error SENSOR TEMP RETURN CIRCULATING WATER check the resistance by tester see table 3 if the sensor is faulty it should be replaced P1 Pump Error PUMP or PCB CONTROLLER check the voltage of PUMP see fig 3 if the voltage is normal PUMP should be replaced if the voltage is abnormal PCB CONTROL...

Page 8: ...SW and RESET SW at the same time for 5 seconds to display a past error code and its sequence number The PUMP SW can then be used to select between a maximum of 8 past error codes to display If there are no er ror codes is displayed 1 Display method 2 Display cancellation For a unit display board While an error code is being displayed press and hold the PUMP SW and RESET SW at the same time for 5 s...

Page 9: ...ing off the con nector 14 Measure voltage between the connector pins of con nector 13 Connector 13 shall be checked during heat ing or cooling operation Measure voltage as follows without taking off the con nector 13 PCB CONTROLLER is Normal PCB CONTROLLER is Normal between red and black approx DC200 370V between yellow and black approx DC3 7V between white and black approx DC15V between white and...

Page 10: ...cs and detach FRONT PANEL ASSY See picture 3 4 Be sure to confirm the voltage between the connector pins of pump connector13 between white and black _ is less than DC 10V with tester before disconnect lead wires See picture 4 1 4 2 4 3 Wait at least 5min After turning off the power before servicing picture 1 picture 2 picture 3 picture 4 1 picture 4 3 picture 4 2 ...

Page 11: ...re 6 7 Disconnect 3 lead wires black white red from TERMINAL BLOCK Unscrew the gray lead wire See picture 7 8 Disconnect all lead wires from PCB CONTROLLER and move CASE OF PCB forward See picture 8 picture 6 picture 8 picture 7 picture 5 1 picture 5 2 picture 5 3 lead wire for FAN MOTOR TERMINAL BLOCK 3 lead wires black white red gray lead wire CASE OF PCB ...

Page 12: ...picture 9 10 Unscrew and unlock 6 hooks See picture 10 Unscrew and unlock hooks one by one and detach PCB CONTROLLER slowly 11 Detach PCB CONTROLLER from CASE See picture 11 picture 10 picture 11 unscrew hook hook hook hook hook hook CASE OF PCB CASE OF PCB COVER PCB CONTROLLER picture 9 CASE OF PCB COVER ...

Page 13: ...es black white red and the gray lead wire are hooked See picture 12 1 Ensure that PCB DISPLAY is connected to PCB CONTROLLER properly See picture 12 2 Be sure to put FAN MOTOR lead wires in the passage along the side of CASE OF PCB See picture 12 3 Bind lead wires as they were See picture 12 4 picture 12 1 picture 12 2 picture 12 3 picture 12 4 ...

Page 14: ...c circuit including the wiring of thermistor and others as it has high voltage against the ground Pay attention not to damage the insulated wire when you tighten the screw as the exposed wire may cause electric shock or malfunction Do not ground the oscilloscope when you operate You might destroy it Also do not touch any metal part of the oscilloscope while operating How to release locking termina...

Page 15: ... below about 2 C freeze pre vention operation is possible depending on the unit MODE SW 1 1 No freeze prevention operation When using anti freeze 2 Freeze prevention operation When the outdoor temperature falls below about 2 C the circulating water is warmed and circulated CHARGETHE CIRCULATIONWATER AND AIR PURGE INWATER CIRCUIT When you push PUMP SW on display PCB the water pump is started to ope...

Page 16: ... E F F G G E 6 7 1 2 8 68 28 67 25 4 45 15 39 53 54 60 60 11 50 60 60 66 58 56 31 29 30 32 42 43 55 59 41 49 61 18 47 60 61 60 48 24 17 57 65 20 21 36 34 35 37 33 12 3 16 46 23 22 44 54 51 14 38 9 13 24 57 62 62 5 26 27 18 5 8 7 11 20 ...

Page 17: ...PLAY 30137930 28 PCB CONTROLLER 30154050 29 RUBBER HOSE FOR RELIEF VALVE 30137730 30 RUBBER HOSE FOR AIR PURGE VALVE 30137740 31 HOSE BAND FOR RELIEF VALVE 30084480 32 HOSE BAND FOR AIR PURGE VALVE 68616090 33 SOUND PROOF MATERIAL 1 20694790 34 SOUND PROOF MATERIAL 2 20694800 35 SOUND PROOF MATERIAL 3 20694810 36 SOUND PROOF MATERIAL 4 20694820 37 SOUND PROOF MATERIAL 5 20695360 38 OUTDOOR THERMIS...

Page 18: ...CK FASTENER 00601690 60 HOSE BAND 30138460 61 HOSE BAND 30072400 62 HOSE BAND 30122230 65 DRAIN PLUG 10056760 66 CONNECTOR PIPE ASSY 20768430 67 CASE OF PCB 20682670 68 CASE OF PCB COVER 20696130 No PARTS NAME PARTS No 1 Interface Kit 20612052 UTZ AT10CA ...

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