Mitsubishi Electric SUZ-KA25VA3 Technical & Service Manual page 28

11-4. TROUBLE CRITERION OF MAIN PARTS (1)
SUZ-KA25VA3.TH
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)
OCH530
SUZ-KA35VA3.TH
Check method and criterion
Measure the resistance using a tester.
Refer to 11-6. "Test point diagram and voltage", 11-6-1.
"Inverter P.C. board", for the chart of thermistor.
Measure the resistance using a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 11-6. "Test point diagram and voltage", 11-6-1.
"Inverter P.C. board", for the chart of thermistor.
Measure the resistance between terminals using a tester.
(Temperature : -20°C ~ 40°C)
SUZ-KA25VA3.TH
U-V
U-W
1.36 ~ 1.93
V-W
Measure the resistance between terminals using a tester.
(Temperature : -20°C ~ 40°C)
Color of the lead wire
WHT - BLK
BLK - RED
RED - WHT
Measure the resistance between terminals using a tester.
(Temperature : -20°C ~ 40°C)
Normal
1.19 k ~ 1.78 k
Measure the resistance using a tester.
(Temperature : -20°C ~ 40°C)
Color of the lead wire
WHT - RED
RED - ORN
YLW - BRN
BRN - BLU
Normal
SUZ-KA35VA3.TH
1.52 ~ 2.17
Normal
29 ~ 42
Normal
37 ~ 54
28
Figure
WHT
RED BLK
W
V
U
WHT
RED BLK
W
V
U
WHT
LEV
RED
ORN