Mitsubishi Electric Mr. Slim MUZ-GE15NA-1, Service Manual

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51
10-4. TROUBLE CRITERION OF MAIN PARTS
MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NA
MUZ-GE09NA2 MUZ-GE12NA2 MUZ-GE15NA2
MUZ-GE09NAH MUZ-GE12NAH MUZ-GE15NAH MUZ-GE18NAH
MUZ-GE09NAH2 MUZ-GE12NAH2 MUZ-GE15NAH2
MUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA
MUY-GE24NA
MUY-GE09NA2 MUY-GE12NA2 MUY-GE15NA2
Part name Check method and criterion Figure
Defrost thermistor (RT61)
(MUZ)
Fin temperature
thermistor (RT64)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Measure the resistance with a tester.
Refer to 10-6. “Test point diagram and voltage”, 1. “Inverter P.C.
board”, for the chart of thermistor.
Discharge temperature
thermistor (RT62)
Measure the resistance with a tester. Before measurement, hold the
thermistor with your hands to warm it up.
Refer to 10-6. “Test point diagram and voltage”, 1. “Inverter P.C.
board”, for the chart of thermistor.
Compressor
Measure the resistance between terminals using a tester.
(Temperature: -4 ~ 104°F (-20 ~ 40°C))
Normal ( Ω )
GE09 GE12 GE15/18 GE24
U-V
U-W
V-W
1.36 ~ 1.93 1.52 ~ 2.17 0.78 ~ 1.11 0.83 ~ 1.18
Outdoor fan motor
Measure the resistance between lead wires using a tester.
(Temperature: -4 ~ 104°F (-20 ~ 40°C))
Color of lead wire
Normal ( Ω )
GE09/12 GE15 GE18/24
RED – BLK
BLK – WHT
WHT – RED
28 ~ 40 11 ~ 16
R. V. coil (21S4)
(MUZ)
Measure the resistance using a tester.
(Temperature: 14 ~ 104°F (-10 ~ 40°C))
Normal (k Ω )
0.97 ~ 1.38
Expansion valve coil
(LEV)
Measure the resistance using a tester.
(Temperature: 14 ~ 104°F (-10 ~ 40°C))
Color of lead wire Normal ( Ω )
WHT – RED
37 ~ 54
RED – ORN
YLW – BRN
BRN – BLU
Defrost heater
MUZ-GE•NAH
Measure the resistance using a tester.
(Temperature: 14 ~ 104°F (-10 ~ 40°C))
Normal ( Ω )
349 ~ 428
W
U
V
WHT RED BLK
W
U
V
WHT RED BLK
LEV
WHT
RED
ORN
YL
W
BRN
BLU
OBH549F