24
25
OCH706
11-4. TROUBLE CRITERION OF MAIN PARTS
Parts name
Figure
Check method and criterion
Outdoor fan motor
R.V. coil (21S4)
Expansion valve coil
(LEV)
Measure the resistance between terminals with a tester.
(Temperature:
−
10 to 40°C)
WH - BK
BK - RD
RD - WH
Normal
Measure the resistance between terminals with a tester.
(Temperature:
−
10 to 40°C)
Normal
Measure the resistance with a tester.
Refer to “11-6. TEST POINT DIAGRAM AND VOLTAGE” for the chart of thermistor.
Color of the lead wire
Discharge temperature
thermistor (RT62)
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” for the chart of thermistor.
Defrost thermistor (RT61)
Fin temperature
thermistor (RT64)
Measure the resistance between terminals with a tester.
(Temperature:
−
10 to 40°C)
Compressor
U-V
U-W
V-W
Normal
W
U
V
WH
RD BK
W
U
V
WH
RD BK
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor(RT68)
1.17 to 1.66 k
Ω
0.87 to 1.18
Ω
25 to 34
Ω
LEV
WH
RD
YE
OG
BU
Measure the resistance with a tester.
(Temperature:
−
10 to 40°C)
RD - OG
RD - WH
RD - BU
RD - YE
Normal
37 to 54
Ω
Color of the lead wire
SUZ-SM71VA.TH
SUZ-SM71VA.TH