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Part name Check method and criterion Figure
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
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.
Discharge temperature
thermistor (RT62)
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.
Compressor
Measure the resistance between terminals using a tester.
(Temperature: -10 ~ 40°C)
Normal (Ω)
MUZ-GE25VA-
A1
MUZ-GE25VA-
A2
MUZ-GE25VAD
MUZ-GE33VA
MUZ-GE35VA
MUZ-GE35VA2-
A1
MUZ-GE35VA2-
A2
MUZ-GE35VAD
MUZ-GE42/50/60VA
MUZ-GE50VA2
MUZ-GE42/50/60VAD
MUZ-GE71/80VA
MUZ-GE80VA2
MUZ-GE71/80VAD
U-V
U-W
V-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
Outdoor fan motor
Measure the resistance between lead wires using a tester.
(Temperature: -10 ~ 40°C)
Color of lead
wire
Normal (Ω)
MUZ-GE25/33/35VA
MUZ-GE35VA2
MUZ-GE25/35VAD
MUZ-GE42VA
MUZ-GE42VAD
MUZ-GE50/60/71/80VA
MUZ-GE50/80VA2
MUZ-GE50/60/71/80VAD
RED – BLK
BLK – WHT
WHT – RED
29 ~ 42 11 ~ 16 12 ~ 17
R. V. coil (21S4)
Measure the resistance using a tester. (Temperature: -10 ~ 40°C)
Normal (kΩ)
1.19 ~ 1.78
Expansion valve coil
(LEV)
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 Normal (Ω)
WHT – RED
37 ~ 54
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 Normal (Ω)
RED – ORN
37 ~ 54
RED – WHT
RED – BLU
RED – YLW
W
U
V
WHT
RED BLK
W
U
V
WHT
RED BLK
LEV
WHT
RED
ORN
YLW
BRN
BLU
RED
(+12V)
Y
LW
BLU
WHT
ORN
LEV
11-4. TROUBLE CRITERION OF MAIN PARTS
MUZ-GE25VA MUZ-GE25VAD MUZ-GE33VA MUZ-GE35VA MUZ-GE35VA2 MUZ-GE35VAD
MUZ-GE42VA MUZ-GE42VAD MUZ-GE50VA MUZ-GE50VA2 MUZ-GE50VAD
MUZ-GE60VA MUZ-GE60VAD MUZ-GE71VA MUZ-GE71VAD
MUZ-GE80VA MUZ-GE80VA2 MUZ-GE80VAD
OBH532E