Trouble Criterion Of Main Parts - Mitsubishi Electric Mr.SLIM SUZ-M25VA-ER Technical & Service Manual

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)
OCH684G
Check method and criterion
Measure the resistance with a tester.
Refer to "11-6. Test point diagram and voltage", 11-6-1. (M25/35/50) or
11-6-2. (M60/71) "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. (M25/35/50) or
11-6-2. (M60/71) "Inverter P.C. board", for the chart of thermistor.
SUZ-M25
U-V
1.59 to 2.16 Ω
U-W
V-W
Measure the resistance between terminals with a tester.
(Temperature: −10 to 40°C)
Color of the lead wire
SUZ-M25/35
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-M25/35/50 SUZ-M60/71
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
Normal
SUZ-M35 SUZ-M50/60
1.60 to 2.17 Ω 0.82 to 1.11 Ω
Normal
SUZ-M50
15 to 20 Ω
Normal
37 to 54 Ω
29
Figure
WH
SUZ-M71
V
0.87 to 1.18 Ω
WH
SUZ-M60/71
V
25 to 34 Ω
WH
OG
RD
RD BK
W
U
RD BK
W
U
LEV
YE BU