Mitsubishi MUZ-GE25VA - Troubleshooting Criteria for Main Parts

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11-4. TROUBLE CRITERION OF MAIN PARTS
MUZ-GE25VA MUZ-GE25VAH MUZ-GE35VA MUZ-GE35VAH
MUZ-GE42VA MUZ-GE42VAH MUZ-GE50VA MUZ-GE50VAH
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”, the chart of thermistor.
Discharge temperature
thermistor (RT62)
Measure the resistance with a tester. Before measurement, hold the
thermistor with your hands to warm it up.
Refer to 11-6. “Test point diagram and voltage”, 1. “Inverter P.C.
board”, the chart of thermistor.
Compressor
Measure the resistance between terminals using a tester.
(Temperature: -10 ~ 40°C)
Normal (Ω)
GE25 GE35 GE42/50
U-V
U-W
V-W
1.36 ~ 1.93 1.52 ~ 2.17 0.78 ~ 1.11
Outdoor fan motor
Measure the resistance between lead wires using a tester.
(Temperature: -10 ~ 40°C)
Color of lead wire
Normal (Ω)
GE25/35 GE42 GE50
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)
Color of lead wire Normal (Ω)
WHT – RED
37 ~ 54
RED – ORN
YLW – BRN
BRN – BLU
Defrost heater
MUZ-GE•VAH
Measure the resistance using a tester.
(Temperature: -10 ~ 40°C)
Normal (Ω)
349 ~ 428
W
U
V
WHT
RED BLK
W
U
V
WHT
RED BLK
LEV
WHT
RED
ORN
YLW
BRN
BLU