Mitsubishi Electric PUZ-A NHA Series Service Manual page 25

10-6. HOW TO CHECK THE PARTS
PLA-A12AA PLA-A18AA
PLA-A12AA PLA-A18AA
1
Parts name
Room temperature Disconnect the connector then measure the resistance using a tester.
thermistor (TH1) (At the ambient temperature 10:(50˚F)~30:(86˚F))
Pipe temperature
thermistor/liquid(TH2)
Condenser/Evaporator
temperature thermistor
(TH5)
Vane motor (MV)
Measure the resistance between the terminals using a tester.
(At the ambient temperature20:(68˚F))
Fan motor (MF) Measure the resistance between the terminals using a tester.
(Winding temperature 20:(68˚F))
Relay connector
1
Red 1
White
2
2
3
Black
3
Protector
OFF:130:
ON :80i20:
Drain pump (DP)
Measure the resistance between the terminals using a tester.
(Winding temperature 20:(68˚F))
YLW
1
3
YLW
Drain sensor (DS) Measure the resistance between the terminals using a tester.
Measure the resistance after 3 minutes have passed since the power supply was intercepted.
(At the ambient temperature 0:(32˚F)~60:(140˚F))
1
2
3
PLA-A24AA
PLA-A24AA
1
Normal
4.3k"~9.6k" Open or short
Normal
15k" Open or short
Motor terminal
or
PLA-A12/18/24/30AA
Relay connector
PLA-A12/18/24/30AA
Red-Black
White-Black
Normal Abnormal
319" Open or short
Normal Abnormal
0.6k"~6.0k" Open or short
PLA-A30AA
PLA-A30AA
1
Check points
Abnormal
(Refer to the thermistor characteristic graph.)
Abnormal
Normal
PLA-A36/42AA
PLA-A36/42AA
1
87.2" 32.6"
104.1" 40.7"
(Refer to the thermistor characteristic graph.)
25
PLA-A36AA PLA-A42AA
PLA-A36AA PLA-A42AA
1 1
Abnormal
1
Open or short
1