Mitsubishi Electric PUZ-WZ50VAA Service Manual page 49

9-4. HOW TO CHECK THE PARTS
Parts name
Thermistor (TH3)
<Liquid>
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
<Two-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat sink>
Thermistor (TH33)
<Comp. surface>
Thermistor (TH32)
<Liquid>
Thermistor (TH34)
<Plate hex liquid>
Thermistor (TH35)
<Suction Pipe>
Fan motor
(MF1)
Solenoid valve coil
<4-way valve>
(21S4)
Motor for compressor
(MC)
U
V
W
Linear expansion valve
(LEV-A/LEV-B)
GY
M 1
OG
2
RD
3
YE
4
BK
5
OCH816
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10 to 30˚C)
Normal
TH4
160 to 410 kΩ
TH33
TH3
TH6
TH7
4.3 to 9.6 kΩ
TH32
TH34
TH35
TH8
39 to 105 kΩ
Refer to the next page.
Measure the resistance between the terminals with a tester.
(At the ambient temperature 20:)
Normal
WZ50
1725 ± 173 Ω
Measure the resistance between the terminals with a tester.
(Winding temperature 20:)
WZ50VAA WZ60VAA
0.98 Ω 0.95 Ω
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 20:)
Gray - Black Gray - Red
Checkpoints
Abnormal
Open or short
WZ60-80
Open or short
1435 ± 150 Ω
WZ80VAA Abnormal
0.95 Ω Open or short
Normal
Gray - Yellow
46 ± 3Ω
49
Abnormal
Abnormal
Gray - Orange
Open or short