Mitsubishi Electric MUZ-GC25VA, Service Manual

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11-4. Trouble criterion of main parts
MUZ-GC25VA MUZ-GC35VA
MUZ-GC25VAH MUZ-GC35VAH
Part name Figure Check method and criterion
Outdoor fan motor (MF)
INNER FUSE
(Only MUZ-GC25)
RA6V21-AB
152
: CUT OFF
RA6V21-BB
126
i
2 : CUT OFF
+0
-5
R.V. coil (21S4)
Expansion valve coil (LEV)
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
WHT – BLK
BLK – RED
RED – WHT
Normal
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
Normal
1.26 k " ~ 1.62 k " 1.21 k " ~ 1.56 k "
WHT – RED
RED – ORN
YLW – BRN
BRN – BLU
Normal
38 " ~ 50 "
Measure the resistance with a tester.
(Part temperature –20˚C ~ 40˚C)
Measure the resistance with a tester.
Refer to 11-7. "Test point diagram and voltage", 1. "Inverter P.C. board",
the chart of thermistor.
Refer to 11-7. "Test point diagram and voltage", 1. "Inverter P.C. board",
the chart of thermistor.
Color of the lead wire
Color of the lead wire
Discharge temperature
thermistor (RT62)
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Defrost thermistor
(RT61)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
31 " ~ 41 "
31 " ~ 41 "
31 " ~ 41 "
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
Compressor (MC)
MUZ-GC25
U-V
U-W
V-W
Normal
1.43 " ~ 1.84 "
1.58 " ~ 2.03 "
MUZ-GC35
MUZ-GC25
MUZ-GC35 MUZ-GC25
Measure the resistance with a tester.
(Part temperature –20˚C ~ 40˚C)
MUZ-GC35
MUZ-GC25
2 3
W
U
V
1
WHT
RED BLK
2 3
W
U
V
1
WHT RED BLK
WHT RED
BLK
FUSE
MUZ-GC35
Defrost heater (H)
Normal
313 " ~ 402 " 333 " ~ 428 "
MUZ-GC35 MUZ-GC25
RA6V21-BB RA6V21-AB
292 " ~ 374 "
236 " ~ 304 "
212 " ~ 272 "
234 " ~ 300 "
LEV
WHT
6
RED
1
ORN
4
YL
W
5
BRN
2
BLU
3
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