Loading ...
Loading ...
Loading ...
48
10-4. TROUBLESHOOTING CRITERION OF MAIN PARTS
MUZ-GL09NA MUZ-GL09NAH MUY-GL09NA
MUZ-GL12NA MUZ-GL12NAH MUY-GL12NA
MUZ-GL15NA MUZ-GL15NAH MUY-GL15NA
MUZ-GL18NA MUZ-GL18NAH MUY-GL18NA
MUZ-GL24NA MUZ-GL24NAH MUY-GL24NA
Part name Check method and criterion Figure
Defrost thermistor (RT61)
(MUZ)
Fin temperature
thermistor (RT64)
Ambient temperature ther-
mistor (RT65)
Outdoor heat exchanger tem-
perature 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 ther-
mistor (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: 14 - 104°F (-10 - 40°C)]
Normal (Ω)
MUZ-GL09NA-
U1
MUZ-GL09NAH-
U1
MUY-GL09NA-
U1
MUZ-GL09NA-
U2
MUZ-GL09NAH-
U2
MUY-GL09NA-
U2
MUZ-GL09NA-
U8
MUZ-GL09NAH-
U8
MUZ-GL12
MUY-GL12
MUZ-
GL15/18
MUY-
GL15/18
MUZ-GL24
MUY-GL24
U-V
U-W
V-W
1.26 - 1.72 1.59 - 2.16 1.60 - 2.17 0.82 - 1.11 0.87 - 1.18
W
U
V
WHT
RED BLK
Outdoor fan motor
Measure the resistance between lead wires using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Color of lead wire
Normal (Ω)
MUZ-GL09/12/15-
U1
MUY-GL09/12/15-
U1
MUZ-GL09NA-
U8
MUZ-GL09/12/15-
U2
MUY-GL09/12/15-
U2
MUZ-GL18/24
MUY-GL18/24
RED – BLK
BLK – WHT
WHT – RED
29 - 40 28 - 39 12 - 16
W
U
V
WHT
RED BLK
R. V. coil (21S4)
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Normal (kΩ)
MUZ-GL09/12NA-
U1
,
U8
MUZ-GL09/12NAH-
U1
,
U8
MUZ-GL15/18/24NA, MUZ-GL15/18/24NAH
MUZ-GL09/12NA-
U2
MUZ-GL09/12NAH-
U2
0.97 - 1.38 1.65 - 2.48
Expansion valve coil (LEV)
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Color of lead wire Normal (Ω)
RED – ORN
37 - 54
RED – WHT
RED – BLU
RED – YLW
RED
(+12V)
YLW
BLU
WHT
ORN
LEV
Defrost heater
(MUZ-GL·NAH)
Measure the resistance using a tester.
[Temperature: 14 - 104°F (-10 - 40°C)]
Normal (Ω)
GL09/12/15 GL18/24
349 - 428 376 - 461
OBH733J
Loading ...
Loading ...
Loading ...