Suz-Ka50Va3.Th - Mitsubishi Electric SUZ-KA25VA3 Technical & Service Manual

11-4. TROUBLE CRITERION OF MAIN PARTS (2)

SUZ-KA50VA3.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-KA60VA3.TH
Check method and criterion
Measure the resistance using a tester.
Refer to 11-6. "Test point diagram and voltage", 11-6-4. "Outdoor
electronic control P.C. board" or 11-6-2, 11-6-3. "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", 11-6-4. "Outdoor
electronic control P.C. board" or 11-6-2, 11-6-3. "Inverter P.C. board",
for the chart of thermistor.
Measure the resistance between terminals using a tester.
(Temperature : -10°C ~ 40°C)
Normal
SUZ-KA50/60VA3.TH
SUZ-KA71VA3.TH
0.78 ~ 1.11
Measure the resistance between lead wires using a tester.
(Temperature : -10°C ~ 40°C)
Color of the lead wire
RED - BLK
BLK - WHT
WHT - RED
Measure the resistance using a tester.
(Temperature : -10°C ~ 40°C)
Normal
SUZ-KA50/60/71VA3.TH
1.19 k ~ 1.78 k
Measure the resistance using a tester.
(Temperature : -10°C ~ 40°C)
SUZ-KA50/60VA3.TH
Color of the lead wire
WHT - RED
RED - ORN
YLW - BRN
BRN - BLU
SUZ-KA71VA3.TH
Color of the lead wire
RED - ORN
RED - WHT
RED - BLU
RED - YLW
SUZ-KA71VA3.TH
0.92 ~ 1.12
Normal
SUZ-KA50/60/71VA3.TH
12 ~ 17
Normal
37 ~ 54
Normal
37 ~ 54
29
Figure
WHT
RED BLK
W
V
U
WHT RED BLK
W
V
U
WHT
LEV
RED
ORN
YLW BRN BLU
WHT
LEV
ORN
RED
YLW BLU