Mitsubishi Electric PUZ-HWM140VHA Service Manual

(At the ambient temperature of 10 to 30°C) TH3: Liquid pipe temp. TH4: Discharge temp. TH6: 2-phase pipe temp. TH7: Ambient temp. TH8: Heat sink temp. TH32: Suction pipe temp. TH34: Plate Hex liquid pipe temp. Normal 160 to 410 kΩ 4.3 to 9.6 kΩ 39 to 105 kΩ TH4 TH33 TH3 TH6 TH7 TH34 TH8 Abnormal Open or short Measure the resistance between the terminals with a multimeter. (At the ambient temperature of 20°C) Solenoid valve coil <4-way valve> ...

PUZ-HWM140YHA(-BS) Brief Check of POWER MODULE If they are short-circuited, it means that they are broken. Measure the resistance in the following points (connectors, etc.). 1. Check of POWER MODULE 1.Check of DIODE circuit L1 - P1 , L2 - P1 , L3 - P1 , L1 - N1 , L2 - N1 , L3 - N1 2.Check of INVERTER circuit P2 - U , P2 - V , P2 - W , N2 - U , N2 - V , N2 - W Note: The marks, L1 , L2 , L3 , N1 , N2 , P1 , P2 , U , V and W shown in the diagram are not actually printed on the board. CN5 Detection of primary current ...

Case Judgment and action U9 Detailed codes To find out the detail history (latest) about U9 error, turn ON SW2-1, 2-2 and 2-6. Refer to "9-9. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS". 01 Overvoltage error • Increase in DC bus voltage to HWM140V: 430 V HWM140Y: 760 V 1 Abnormal increase in power source voltage 2 Disconnection of compressor wiring 3 Defective outdoor power circuit board 4 Compressor has a ground fault. 1 Check the field facility for the power supply. 2 Correct the wiring (U.V.W phase) to compressor. Refer ...

(1) Remove the electrical parts box. (Refer to procedure 4) (2) Remove 3 valve bed fixing screws (4 × 10), 2 valve and fixing screws (5 × 16) then remove the valve bed. (3) Remove cover panel (front) fixing screws (2 for front/5 × 12) to remove the cover panel (front). (4) Remove the water pipe. (5) Remove 5 right side panel (R) fixing screws (5 × 12) (4:rear of the unit/1: right side base) and remove the side panel (R). (6) Recover the refrigerant. (7) Remove 2 welded pipes of plate heat exchanger inlet and o ...