Mitsubishi Electric MUZ-LN25VG Service Manual page 40

12-4. TROUBLE CRITERION OF MAIN PARTS
MUZ-LN25VG MUZ-LN35VG MUZ-LN50VG MUZ-LN60VG
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)
OBH767
Check method and criterion
Measure the resistance with a tester.
Refer to 12-6. "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
thermistor with your hands to warm it up.
Refer to 12-6. "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-LN25VG MUZ-LN35VG MUZ-LN50VG MUZ-LN60VG
U-V
U-W 1.59 ~ 2.16 1.60 ~ 2.17
V-W
Measure the resistance between lead wires using a tester.
(Temperature: -10 ~ 40°C)
Color of lead wire
MUZ-LN25/35/50VG
RED – BLK
BLK – WHT
WHT – RED
Measure the resistance using a tester. (Temperature: -10 ~ 40°C)
Normal (kΩ)
1.17 ~ 1.66
Measure the resistance using a tester. (Temperature: -10 ~ 40°C)
Color of lead wire
RED – ORN
RED – WHT
RED – BLU
RED – YLW
Normal (Ω)
0.82 ~ 1.11 0.87 ~ 1.18
Normal (Ω)
MUZ-LN60VG
15 ~ 20 25 ~ 34
Normal (Ω)
37 ~ 54
40
Figure
WHT RED BLK
W
V
U
WHT
RED BLK
W
V
U
WHT
LEV
ORN
RED
(+12V)