Mitsubishi Electric PUMY-P36NKMU4 Technical & Service Manual page 112

8-7. HOW TO CHECK PARTS
Parts name
Thermistor (TH2)
Disconnect the connector then measure the resistance with a multimeter.
<Hic pipe>
(At the ambient temperature 50 to 80°F [10 to 30°C]
Thermistor (TH3)
<Outdoor liquid pipe>
Thermistor (TH4)
<Compressor>
Thermistor (TH6)
<Suction pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat sink>
Fan motor (MF1, MF2)
Measure the resistance between the connector pins with a multimeter.
(At the ambient temperature 68°F [20°C])
1
2
3
M
4
5
6
7
1.1 ± 0.05 M
* See the spec name plate indicated in the diagram for the model name of fan motor
* Where "X" in model name of fan motor represents numbers and letters
Solenoid valve coil Measure the resistance between the terminals with a multimeter.
(At the ambient temperature 68°F [20°C)
<4-way valve>
(21S4)
Motor for compressor Measure the resistance between the terminals with a multimeter.
(Winding temperature 68°F [20°C])
(MC)
U
V
W
Solenoid valve coil
Measure the resistance between the terminals with a multimeter.
(At the ambient temperature 68°F [20°C])
<Bypass valve>
(SV1)
<Switching valve>
(SV2)*
2
*2 Only NAMHZ2 model.
Linear Expansion Valve
(LEV A)
Gray
M
1
Gray - Black
Orange
2
Red
3
Yellow
4
Black 5
Linear Expansion Valve
(LEV B)
Red - White
Red
M
M 1
Blue
2
Orange
3
Yellow
4
White 5
OCH811A
Normal
TH4
160 to 410 k
TH2
TH3
4.3 to 9.6 k
TH6
TH7
TH8
39 to 105 k
Normal
6 - 4
1 - 4 5 - 4
40 ± 4 k 220 ± 22 k
Open 150 ± 15k 55 ± 11 k
Normal
1567.5 ± 156.8
Normal
0.305 ± 0.015
Normal
1197 ± 10
Normal
Gray - Red
46 ± 3
Normal
Red - Orange
46 ± 4
Checkpoints
Abnormal
Open or short
Abnormal
7 - 4
Open or short
Open
(Short, for 7 - 4)
Open
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Gray - Yellow Gray - Orange
Red - Yellow Red - Blue
112
Model name of fan motor *
SIC-82XX / SIC-88XX
SIC-71XX / SIC-81XX
Abnormal
Open or short
Abnormal
Open or short