Trouble Criterion Of Main Parts - Mitsubishi Electric Mr.Slim SUZ-KA25VA3 Service Manual

11-4. TROUBLE CRITERION OF MAIN PARTS

SUZ-KA25VA3.TH SUZ-KA35VA3.TH
Parts 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)
OCH530A
SUZ-KA50VA3.TH
Check method and criterion
Measure the resistance with a tester.
Refer to 11-6. "Test point diagram and voltage", 11-6-1. (KA25/35/50) or
11-6-2. (KA60/71) "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 11-6. "Test point diagram and voltage", 11-6-1. (KA25/35/50) or
11-6-2. (KA60/71) "Inverter P.C. board", for the chart of thermistor.
Measure the resistance between terminals with a tester.
(Temperature: -10°C ~ 40°C)
SUZ-KA25VA3.TH
U-V
U-W
1.36 Ω ~ 1.93 Ω
V-W
Measure the resistance between terminals with a tester.
(Temperature: -10°C ~ 40°C)
Color of the lead wire
SUZ-KA25/35VA3.TH
WHT - BLK
BLK - RED
RED - WHT
Measure the resistance between terminals with a tester.
(Temperature : -10°C ~ 40°C)
Normal
1.19 kΩ ~ 1.78 kΩ
Measure the resistance with a tester.
(Temperature : -10°C ~ 40°C)
SUZ-KA25/35VA3.TH
Color of the lead wire
WHT - RED
RED - ORN
YLW - BRN
BRN - BLU
Measure the resistance with a tester.
(Temperature : -10°C ~ 40°C)
SUZ-KA50/60/71VA3.TH
Color of the lead wire
RED - ORN
RED - WHT
RED - BLU
RED - YLW
SUZ-KA60VA3.TH SUZ-KA71VA3.TH
Normal
SUZ-KA35VA3.TH SUZ-KA50/60VA3.TH
1.52 Ω ~ 2.17 Ω 0.78 Ω ~ 1.11 Ω
Normal
SUZ-KA50/60/71VA3.TH
29 Ω ~ 42 Ω
Normal
37 Ω ~ 54 Ω
Normal
37 Ω ~ 54 Ω
28
WHT
SUZ-KA71VA3.TH
V
0.92 Ω ~ 1.12 Ω
WHT
V
12 Ω ~ 17 Ω
WHT
RED
ORN
WHT
ORN
RED
Figure
RED BLK
W
U
RED BLK
W
U
LEV
LEV
YLW BLU