Mitsubishi Electric SUZ-SWM30VA TH Series Service Manual page 28

10-4. TROUBLESHOOTING CRITERION OF MAIN PARTS
Part name
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature ther-
mistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Discharge temperature
thermistor (RT62)
Compressor
Outdoor fan motor
R.V. coil (21S4)
Expansion valve coil
(LEV)
Defrost heater
OCH796A
Check method and criterion
Measure the resistance with a multimeter.
Refer to 10-6. "Test point diagram and voltage", 1. "Inverter P.C.
board", for the chart of thermistor.
Measure the resistance with a multimeter. Before measurement, hold
the thermistor with your hands to warm it up.
Refer to 10-6. "Test point diagram and voltage", 1. "Inverter P.C.
board", for the chart of thermistor.
Measure the resistance between terminals using a multimeter.
(Temperature: -10 to 40°C)
SUZ-SWM30VA
SUZ-SHWM30VAH
SUZ-SWM40VA2
SUZ-SWM40VA2-SC
U-V
U-W 0.82 - 1.11
V-W
Measure the resistance between lead wires using a multimeter.
(Temperature: -10 ~ 40°C)
SUZ-SWM30VA
SUZ-SHWM30VAH
SUZ-SWM40VA2
Color of lead wire
SUZ-SWM40VA2-SC
SUZ-SHWM40VAH
SUZ-SHWM40VAH-SC
SUZ-SWM60VA2
SUZ-SWM60VA2-SC
RED – BLK
BLK – WHT
WHT – RED
Measure the resistance using a multimeter. (Temperature: -10 to
40°C)
Normal (kΩ)
SUZ-SWM30VA
SUZ-SHWM30VAH
SUZ-SWM40VA2
SUZ-SWM40VA2-SC
SUZ-SHWM40VAH
SUZ-SHWM40VAH-SC
SUZ-SWM60VA2
SUZ-SWM60VA2-SC
0.39 - 0.60
Measure the resistance using a multimeter. (Temperature: -10 to
40°C)
Color of lead wire
RED – ORN
RED – WHT
RED – BLU
RED – YLW
Measure the resistance using a multimeter. (Temperature: -10 to
40°C)
Normal (Ω)
SUZ-SHWM30VAH
SUZ-SHWM40VAH
SUZ-SHWM40VAH-SC
802 - 990
Normal (Ω)
SUZ-SHWM60VAH
SUZ-SHWM40VAH SUZ-SHWM60VAH-SC
SUZ-SHWM40VAH-SC SUZ-SWM80VA2
SUZ-SWM60VA2 SUZ-SWM80VAH2
SUZ-SWM60VA2-SC SUZ-SWM100VA
SUZ-SWM100VAH
0.87 - 1.18 1.45 - 1.79
Normal (Ω)
SUZ-SHWM60VAH
SUZ-SHWM60VAH-SC
SUZ-SWM80VA2
SUZ-SWM80VAH2
SUZ-SWM100VA
SUZ-SWM100VAH
32 - 43 25 - 34
SUZ-SHWM60VAH
SUZ-SHWM60VAH-SC
SUZ-SWM80VA2
SUZ-SWM80VAH2
SUZ-SWM100VA
SUZ-SWM100VAH
1.19 - 1.78
Normal (Ω)
37 - 54
SUZ-SHWM60VAH
SUZ-SHWM60VAH-SC
SUZ-SWM80VAH2
SUZ-SWM100VAH
376 - 461
28
Figure
WHT RED BLK
W
V
U
WHT
RED BLK
W
V
U
WHT
LEV
ORN
RED
(+12V)