Mitsubishi Electric PUHZ-W50VHA2R1 Service Manual page 23

8-4. HOW TO CHECK THE PARTS
PUHZ-W50VHA2
PUHZ-W50VHA2-BS
Parts name
Thermistor (TH3) <Liquid>
Thermistor (TH4) <Discharge>
Thermistor (TH6) <Plate HEX Liquid>
Thermistor (TH7) <Ambient>
Thermistor (TH8) <Heat Sink>
Thermistor (TH32) <Inlet Water>
Thermistor (TH34) <Comp. Surface>
Fan motor (MF1)
Solenoid valve coil
<4-way valve>
(21S4)
Compressor
(MC)
U
V
W
Linear expansion valve
(LEV-A) (LEV-B)
Gray
M
1
Orange
2
Red
3
Yellow 4
Black 5
OCH605A
PUHZ-W50VHA2R1
PUHZ-W50VHA2R1-BS
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature of 10 to 30:)
TH4
TH34
TH3
TH6
TH7
TH32
TH8
Refer to "8-4-1. Check method of DC fan motor (fan motor/outdoor controller circuit board)".
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20:)
Normal
2350±170"
Measure the resistance between the terminals with a tester.
(Winding temperature 20:)
Normal
0.640 "
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 20°C)
Gray - Black Gray - Red
23
Check points
Normal Abnormal
160 to 410 k"
4.3 to 9.6 k"
Open or short
4.4 to 9.8 k"
39 to 105 k"
Abnormal
Open or short
Abnormal
Open or short
Normal
Gray - Yellow Gray - Orange
46 ± 3 Ω
Abnormal
Open or short