Mitsubishi Electric PCA-RP50GA Service Manual page 29

10-5. HOW TO CHECK THE PARTS
PCA-RP50/60/71/100/125/140GA
PCA-RP50/60/71/100/125/140GA#1
PCA-RP50GA2
PCH-P50/60/71/100/125/140GAH
Parts name
Room temperature
thermistor (TH1)
Pipe temperature
thermistor (TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Fan motor
Relay connector
1
Red
1
White
2
2
3
Black
3
Protector
OFF : 130 5
ON : 80 20
Vane motor
Orange
M
Red
Pink
Yellow Brown Blue
Pink
M
Orange
Red
Yellow Blue
Heater
(Only PCH)
Drain-up
mechanism (Option)
Gray
1
3
Gray
Contactor
(Only PCH)
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PCA-RP50GA2#1
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10 ~30 )
Normal
4.3k ~9.6k
Measure the resistance between the terminals using a tester.
(Winding temperature 20 )
Motor terminal
or
50GA
Relay connector
Red–Black
70.6
White–Black
69.6
Connector
Brown–Yellow
Brown–Blue
186~214
Red–Orange
Red–Pink
Normal
Connector
100, 125, 140
Red–Yellow
Red–Blue
140~160
Red–Orange
Red–Pink
Measure the resistance of each heater element with a tester.
(At the ambient temperature 20 )
50
13.7
0.467kW 80V 0.7kW 80V
Measure the resistance between the terminals with a tester.
(Winding temperature 20 )
Normal
195
Measure the resistance between the terminals with a tester.
Normal
50~140
6 1
88H
160
Check points
Abnormal
(Refer to the next pege for a detail.)
Open or short
Normal
50GA2
60, 71
45.0
44.8
Normal
50GA 50GA2, 60, 71
140~160
Abnormal
Open or short
Normal
60, 71 100
9.1 7.1
0.9kW 80V
Abnormal
Open or short
Abnormal
Open or short
29
100 125, 140
43.7 20.4
55.3 20.7
Abnormal
Open or short
125,140
6.4
1.0kW 80V
Abnormal
Open or short
Abnormal
Open or short