Mitsubishi Electric CITY MULTI PUMY-P112VKM6 Service Manual page 90

8-7. How to check the parts
8-7-1. Checkpoints for each part
■ Thermistors
Disconnect the connector then measure the resistance with a multimeter (at the ambient temperature 10 to 30°C [50 to
80°F]).
Thermistors
TH4 (Compressor)
TH2 (HIC pipe)
TH3 (Outdoor liquid pipe)
TH6 (Suction pipe)
TH7 (Ambient)
TH8 (Heat sink)*
* TH8 is internal thermistor of power module. (V)
■ Fan motor (MF1, MF2)
Red
M
Blue
Brown
Orange
White
Measure the resistance between the connector pins with a multimeter (at the ambient temperature 20°C [68°F]).
Connector pins
Red - Blue
Brown - Blue
Orange - Blue
White - Blue
■ Solenoid valve coil <4-way valve> (21S4)
Measure the resistance between the terminals with a multimeter (at the ambient temperature 20°C [68°F]).
Normal
2085 ± 208.5 Ω
■ Motor for compressor (MC)
U
V
W
Measure the resistance between the terminals with a multimeter (at the ambient temperature 20°C [68°F]).
Model
PUMY-P•VKM
PUMY-P•YKM
■ Solenoid valve coil <Bypass valve> (SV1)
Measure the resistance between the terminals with a multimeter (at the ambient temperature 20°C [68°F]).
Normal
1182.5 ± 83 Ω
■ Linear expansion valve (LEV-A)
Gray
M
Orange
Red
Yellow
Black
Connector pins
Gray - Black
Gray - Red
Gray - Yellow
Gray - Orange
■ Linear expansion valve (LEV-B)
Red
M
Blue
Orange
Yellow
White
Connector pins
Red - White
Red - Orange
Red - Yellow
Red - Blue
OCH790 _90
Normal Abnormal
160 to 410 kΩ Open or short
4.3 to 9.6 kΩ
39 to 105 kΩ
1
2
3
4
5
6
7
Normal Abnormal
1.1 ± 0.05 MΩ Open or short
(Short, for White - Blue)
40 ± 4 kΩ
220 ± 22 kΩ
Open
Abnormal
Open or short
Normal Abnormal
0.305 ± 0.015 Ω Open or short
0.466 ± 0.023 Ω
Abnormal
Open or short
1
2
3
4
5
Normal Abnormal
46 ± 3 Ω Open or short
1
2
3
4
5
Normal Abnormal
46 ± 4 Ω Open or short