Mitsubishi Electric PSA-RP71GA Service Manual page 25

10-5. HOW TO CHECK THE PARTS
PSA-RP71GA
PSA-RP71GA#1
PSH-P71GAH
Parts name
Disconnect the connector then measure the resistance using a tester.
Room temperature
thermistor (TH1)
(Surrounding temperature 10 ~30 )
Pipe temperature
thermistor (TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Fan motor(MF)
Measure the resistance between the terminals using a tester.
71, 100
(Winding temperature 20 )
White
Orage
Red
Black
Blue
Yellow
125, 140
White
Orage
Red
Yellow
Blue
Black
Brown
Measure the resistance between the terminals using a tester.
Louver motor(ML)
(Surrounding temperature 25 )
Measure the resistance of each heater element by using a tester.
Heater(H)
(Only PSH)
<Thermistor Characteristic graph>
Thermistor for
lower temperature
Thermistor R =15k" ± 3%
0
Fixed number of B=3480 ± 2%
Rt=15exp { 3480(
273+t
0: 15k"
10: 9.6k"
20: 6.3k"
25: 5.4k"
30: 4.3k"
40: 3.0k"
PSA-RP100GA
PSA-RP100GA#1
PSH-P100GAH
Normal
4.3k ~9.6k Open or short
Motor terminal
or
Relay connector
White–Black
112.1
Black–Blue 22.1
Blue–Yellow
41.0
Black–Red
178.5
Motor terminal
or
Relay connector
White–Brown
28.0
Brown–Black
6.9
Black–Blue 13.3
Blue–Yellow
8.4
Yellow–Red 53.6
Normal
11000~13000
Normal
71 100
18.9 14.7
0.7kW 80V 0.9kW 80V
Room temperature thermistor(TH1)
Pipe temperature thermistor(TH2)
Condenser/evaporator temperature
thermistor(TH5)
1
1
) }
273
PSA-RP125GA
PSA-RP125GA#1
PSH-P125GAH
Check points
Abnormal
(Refer to the <Thermistor Characteristic graph> for a detail.)
Normal
71 100
91.5
18.0
29.6
174.9
Normal
125 140
21.7
7.8
14.3
7.7
54.4
Abnormal
Open or short
125, 140
13.2
1kW 80V
25
PSA-RP140GA
PSA-RP140GA#1
PSH-P140GAH
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
< Thermistor for lower temperature >
50
40
30
20
10
0
-20 -10 0 10 20 30 40 50
Temperature ( )