Mitsubishi Electric MUZ-GA35VA-E3 Service Manual page 38

11-5. Trouble criterion of main parts
MUZ-GA25VA MUZ-GA35VA
MUZ-GA25VAH MUZ-GA35VAH
Part name
Defrost thermistor
(RT61)
Ambient temperature
thermistor (RT65)
Discharge temperature
thermistor (RT62)
Fin temperature
thermistor (RT64)
Compressor(MC)
Outdoor fan motor(MF)
INNER FUSE
(Only MUZ-GA25VA/H)
0
: CUT OFF
152i
5
R.V. coil(21S4)
Expansion valve coil(LEV)
MUZ-GA35VA
MUZ-GA35VAH
Defrost heater(H)
Solenoid valve coil
(21R1)
MUZ-GA25VA-
E1 / E2 /
E3 (Serial No. ~6021350T)
MUZ-GA25VAH-
E1 / E2 /
E3 (Serial No. ~7000000T)
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-GA25VA
MUZ-GA25VAH
U-V
U-W 1.58 " ~ 2.03"
V-W
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
Color of the lead wire MUZ-GA25VA
MUZ-GA25VAH
292 " ~ 374 "
WHT – BLK
236 " ~ 304 "
BLK – RED
RED – WHT
Measure the resistance between the terminals with a tester.
(Part temperature –20˚C ~ 40˚C)
Normal
MUZ-GA25VA
MUZ-GA25VAH
1.26 k" ~ 1.62 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 "
Measure the resistance with a tester.
(Part temperature –20˚C ~ 40˚C)
Normal
1,220 " ~ 1,580 "
Normal
MUZ-GA35VA
MUZ-GA35VAH
E1 E2
1.28 " ~ 1.66 "
Normal
MUZ-GA35VA
MUZ-GA35VAH
31 " ~ 41 "
31 " ~ 41 "
31 " ~ 41 "
MUZ-GA35VA
MUZ-GA35VAH
1.20 k" ~ 1.55 k"
Normal
38 " ~ 50 "
38
E3
1.43 " ~ 1.84 "
MUZ-GA25VA
MUZ-GA25VAH
FUSE
BLK
RED
Figure
WHT RED BLK
2 3
1
W
V
U
MUZ-GA35VA
MUZ-GA35VAH
WHT RED BLK
2 3
1
W
V
U
WHT
6
WHT
1
RED LEV
4
ORN