Mitsubishi Electric SUZ-SM35VA Technical & Service Manual page 25

11-4. TROUBLE CRITERION OF MAIN PARTS
Parts name
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor(RT68)
Discharge temperature
thermistor (RT62)
Measure the resistance between terminals with a tester.
(Temperature: −10 to 40°C)
Compressor
Outdoor fan motor
R.V. coil (21S4)
Expansion valve coil
(LEV)
OCH779
Check method and criterion
Measure the resistance with a tester.
Refer to "11-6. Test point diagram and voltage", 11-6-1. (SM35/50) or
11-6-2. (SM60) "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. (SM35/50) or
11-6-2. (SM60) "Inverter P.C. board", for the chart of thermistor.
Normal
SUZ-SM35
U-V
U-W 1.60 to 2.17 Ω
V-W
Measure the resistance between terminals with a tester.
(Temperature: −10 to 40°C)
Color of the lead wire
SUZ-SM35
WH - BK
BK - RD
32 to 43 Ω
RD - WH
Measure the resistance between terminals with a tester.
(Temperature: −10 to 40°C)
Normal
SUZ-SM35/50 SUZ-SM60
1.41 to 2.00 kΩ 1.17 to 1.66 kΩ
Measure the resistance with a tester.
(Temperature: −10 to 40°C)
Color of the lead wire
RD - OG
RD - WH
RD - BU
RD - YE
SUZ-SM50/60
0.82 to 1.11 Ω
Normal
SUZ-SM50
15 to 20 Ω
Normal
37 to 54 Ω
25
Figure
WH
RD
V
WH
RD
SUZ-SM60
V
25 to 34 Ω
WH
OG
RD
BK
W
U
BK
W
U
LEV
YE BU