Trouble Criterion Of Main Parts - Mitsubishi Electric Mr.Slim MUZ-GC25NA - C1 Service Manual

9-4. TROUBLE CRITERION OF MAIN PARTS

MUZ-GC25NA MUZ-GC35NA
Part name
Defrost thermistor (RT61)
Discharge temperature
thermistor (RT62)
Fin temperature
thermistor (RT64)
Compressor (MC)
Outdoor fan motor (MF)
INNER FUSE
+2
126 °C CUT OFF
-2
R. V. coil (21S4)
Expansion valve coil (LEV)
Check method and criterion
Measure the resistance with a tester.
Refer to 9-6. "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 9-6. "Test point diagram and voltage", 1. "Inverter P.C.
board", the chart of thermistor.
Measure the resistance between terminals using a tester.
(Winding temperature : -20 ~ 40°C)
GC25
U-V
U-W 1.58 ~ 2.03 Ω
V-W
Measure the resistance between lead wires using a tester.
(Part temperature : -20 ~ 40°C)
Color of the lead wire
WHT – BLK
BLK – RED
Measure the resistance using a tester.
(Part temperature : -20 ~ 40°C)
Normal
1.26 ~ 1.62 kΩ
Measure the resistance using a tester.
(Part temperature : -20 ~ 40°C)
Color of lead wire
WHT – RED
RED – ORN
YLW – BRN
BRN – BLU
Normal
GC35
1.43 ~ 1.84 Ω
Normal
212 ~ 272 Ω
234 ~ 300 Ω
Normal
38 ~ 50 Ω
34
Figure
WHT RED BLK
2 3
1
W
V
U
FUSE
BLK RED
WHT
WHT
LEV
RED
ORN