Mitsubishi Electric MUZ-GE25VA-a1 Service Manual page 71

11-4. TROUBLE CRITERION OF MAIN PARTS
MUZ-GE25VA MUZ-GE25VAD MUZ-GE33VA
MUZ-GE42VA MUZ-GE42VAD MUZ-GE50VA
MUZ-GE60VA MUZ-GE60VAD MUZ-GE71VA
MUZ-GE80VA MUZ-GE80VA2 MUZ-GE80VAD
Part name
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Discharge temperature
thermistor (RT62)
Compressor
Outdoor fan motor
R. V. coil (21S4)
Expansion valve coil
(LEV)
OBH532E
Check method and criterion
Measure the resistance with a tester.
Refer to 11-6. "Test point diagram and voltage", 1. "Inverter P.C. board", for
the chart of thermistor.
Measure the resistance with a tester. Before measurement, hold the thermis-
tor with your hands to warm it up.
Refer to 11-6. "Test point diagram and voltage", 1. "Inverter P.C. board", for
the chart of thermistor.
Measure the resistance between terminals using a tester.
(Temperature: -10 ~ 40°C)
MUZ-GE25VA-
MUZ-GE25VA-
A1
MUZ-GE25VAD
U-V
U-W 1.36 ~ 1.93 1.22 ~ 1.74 1.52 ~ 2.17 1.36 ~ 1.93 0.78 ~ 1.11 0.87 ~ 1.18
V-W
Measure the resistance between lead wires using a tester.
(Temperature: -10 ~ 40°C)
Color of lead
MUZ-GE25/33/35VA
wire
MUZ-GE35VA2
MUZ-GE25/35VAD
RED – BLK
BLK – WHT 29 ~ 42
WHT – RED
Measure the resistance using a tester. (Temperature: -10 ~ 40°C)
Normal (kΩ)
1.19 ~ 1.78
Measure the resistance using a tester. (Temperature: -10 ~ 40°C)
MUZ-GE25/33/35/42/50VA, MUZ-GE35/50VA2, MUZ-GE25/35/42/50VAD
Color of lead wire
WHT – RED
RED – ORN
YLW – BRN
BRN – BLU
Measure the resistance using a tester. (Temperature: -10 ~ 40°C)
MUZ-GE60/71/80VA, MUZ-GE80VA2, MUZ-GE60/71/80VAD
Color of lead wire
RED – ORN
RED – WHT
RED – BLU
RED – YLW
MUZ-GE35VA
MUZ-GE50VA2 MUZ-GE50VAD
MUZ-GE71VAD
Normal (Ω)
MUZ-GE33VA
MUZ-GE35VA2-
A2 A2
MUZ-GE35VA
MUZ-GE35VAD
MUZ-GE35VA2-
A1
Normal (Ω)
MUZ-GE42VA
MUZ-GE42VAD
11 ~ 16
Normal (Ω)
37 ~ 54
Normal (Ω)
37 ~ 54
71
MUZ-GE35VA2
WHT
MUZ-GE42/50/60VA MUZ-GE71/80VA
MUZ-GE50VA2 MUZ-GE80VA2
MUZ-GE42/50/60VAD MUZ-GE71/80VAD
WHT
MUZ-GE50/60/71/80VA
MUZ-GE50/80VA2
MUZ-GE50/60/71/80VAD
12 ~ 17
WHT
RED
ORN
MUZ-GE35VAD
Figure
RED BLK
W
V
U
RED BLK
W
V
U
LEV
WHT
LEV
ORN
RED
(+12V)