Mitsubishi Electric Mr.SLIM PUMY-P125VKM Service Manual page 45

9-6. HOW TO CHECK THE PARTS
PCA-M35KA
PCA-M100KA
Parts name
Room temperature Disconnect the connector then measure the resistance with a tester.
thermistor (TH1) (At the ambient temperature of 10 to 30°C)
Pipe temperature
thermistor/liquid(TH2)
Condenser/evaporator
temperature thermistor (TH5)
Vane motor (MV)
Measure the resistance between the terminals with a tester.
(At the ambient temperature of 20 to 30°C
White
MV
Orange
Red
Yellow
Blue
Drain pump (DP)
Measure the resistance between the terminals with a tester.
(Option) (Winding temperature 20°C)
1
3
Drain float switch (FS)
Measure the resistance between the terminals with a tester.
Moving part
State of moving part
1
2
3
4
(Option)
9-6-1. Thermistor
<Thermistor Characteristic Graph>
Room temperature thermistor(TH1)
Thermistor for
Pipe temperature thermistor/liquid(TH2)
lower temperature
Condenser/evaporator temperature
thermistor(TH5)
Thermistor R =15kΩ ± 3%
0
Fixed number of B=3480 ± 2%
1
Rt=15exp { 3480(
273+t
0˚C 15 kΩ
10˚C 9.6 kΩ
20˚C 6.3 kΩ
25˚C 5.4 kΩ
30˚C 4.3 kΩ
40˚C 3.0 kΩ
OCH659
PCA-M50KA
PCA-M125KA
Normal Abnormal
4.3 to 9.6kΩ
Open or short
Normal
Connector
Red - Yellow
Red - Blue
300Ω
Red - Orange
Red - White
Normal Abnormal
290Ω Open or short
Normal
UP Short
DOWN Open
1
) }
273
PCA-M60KA
PCA-M140KA
Check points
Refer to "9-6-1. Thermistor".
Abnormal
Open or short
Abnormal
Other than short
Other than open
50
40
30
20
10
0
37
PCA-M71KA
Switch
Magnet
Moving part
< Thermistor for lower temperature >
-20 -10 0 10 20 30 40 50
Temperature (:)