22
9-5. HOW TO CHECK THE PARTS
PCA-RP71HAQ PCA-RP125HAQ
Measure the resistance between the terminals with a tester.
(Winding temperature 20
)
Fan motor
(MF)
Open or short
Abnormal
White
Orange
Yellow
Blue
Black
Red
Relay
connector
Protector
Protector
OPEN : 135±5
CLOSE : 95±15
White–Black
Black–Blue
Blue–Yellow
Yellow–Red
Connector
PCA-RP71
140.5
15.4
28.5
80.4
PCA-RP125
75.6
36.7
23.6
47.8
Normal
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10
~30
)
(Refer to <Thermistor Characteristic graph> for a detail.)
Room temperature
thermistor (TH1)
Pipe temperature
thermistor (TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
Normal
4.3k
~9.6k
Abnormal
Open or short
0
10
20
30
40
50
-20 -10 0 10 20 30 40 50
< Thermistor for lower temperature >
Temperature (
)
Resistance (K
)
<Thermistor Characteristic graph>
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
Thermistor R
0
=15k
Ω
± 3%
Fixed number of B=3480k
Ω
± 2%
Rt=15exp { 3480( ) }
0
:
15k
Ω
10
:
9.6k
Ω
20
:
6.3k
Ω
25
:
5.4k
Ω
30
:
4.3k
Ω
40
:
3.0k
Ω
Thermistor for
lower temperature
1
273+t
1
273
