Mitsubishi Electric MUZ-FA25VA-E1 Service Manual page 32

11-5. Trouble criterion of main parts
MUZ-FA25VA MUZ-FA35VA
MUZ-FA25VAH MUZ-FA35VAH
Part name
Defrost thermistor
(RT61)
Ambient temperature
thermistor (RT65)
Discharge temperature
thermistor (RT62)
Fin temperature
thermistor (RT64)
Compressor(MC)
Outdoor fan motor(MF)
R.V. coil(21S4)
LEV(Expansion valve coil)
Defrost heater(H)
Check method and criterion
Measure the resistance with a tester.
Refer to 11-7. "Test point diagram and voltage", 1. "Inverter P.C. board",
the chart of thermistor.
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 11-7. "Test point diagram and voltage", 1. "Inverter P.C. board",
the chart of thermistor.
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
MUZ-FA25VA
MUZ-FA25VAH
U-V
1.28 " ~ 1.66 "
U-W
V-W
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
Color of the lead wire
WHT – BLK
BLK – RED
RED – WHT
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
Normal
1.20 k" ~ 1.55 k"
Measure the resistance with a tester.
(Part temperature : –20˚C ~ 40˚C)
Color of the lead wire
WHT – RED
RED – ORN
YLW – BRN
BRN – BLU
Measure the resistance with a tester.
(Part temperature –20˚C ~ 40˚C)
Normal
333 " ~ 428 "
Normal
MUZ-FA35VA
MUZ-FA35VAH
0.41 " ~ 0.53 "
Normal
31 " ~ 41 "
31 " ~ 41 "
31 " ~ 41 "
Normal
38 " ~ 50 "
32
Figure
WHT
RED BLK
2 3
1
W
V
U
WHT RED BLK
2 3
1
W
V
U
6
WHT
1
RED LEV
4
ORN