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9-5. HOW TO CHECK THE PARTS
PCA-RP71HAQ
PCA-RP71HAQ-ER
Parts name
Room temperature
Disconnect the connector then measure the resistance with a tester.
thermistor
(TH1)
(At the ambient temperature 10 to 30:)
Pipe temperature
thermistor/liquid (TH2)
Condenser/evaporator
temperature thermistor
(TH5)
(MF)
Fan motor
Measure the resistance between the terminals with a tester.
(Winding temperature 20:)
Relay
connector
Protector
White
Orange
Red
Yellow
Blue
Protector
Black
OPEN : 135±5:
CLOSE : 95±15:
<Thermistor Characteristic Graph>
Thermistor for
lower temperature
Thermistor R
=15 kΩ ± 3%
0
Fixed number of B=3480 kΩ ± 2%
1
Rt=15exp { 3480(
273+t
0:
15 kΩ
10:
9.6 kΩ
20:
6.3 kΩ
25:
5.4 kΩ
30:
4.3 kΩ
40:
3.0 kΩ
OCH492A
PCA-RP125HAQ
Normal
4.3 to 9.6k"
Open or short
Connector
PCA-RP71
White–Black
140.5"
Black–Blue
15.4"
Blue–Yellow
28.5"
Yellow–Red
80.4"
Room temperature thermistor(TH1)
Pipe temperature thermistor/ liquid (TH2)
Condenser/evaporator temperature
thermistor(TH5)
1
) }
273
Check points
Abnormal
Refer to the <Thermistor Characteristic Graph> below.
Normal
PCA-RP125
75.6"
36.7"
23.6"
47.8"
23
Abnormal
Open or short
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0
10 20 30 40 50
Temperature (:)
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