Service manual

35
MUZ-GA50VA
MUZ-GA60VA
MUZ-GA71VA
11-5. TROUBLE CRITERION OF MAIN PARTS
Part name FigureCheck method and criterion
Defrost thermistor
(RT61)
Ambient temperature
thermistor (RT65)
Outdoor heat exchanger
temperature thermistor
(RT68)
Normal
0.40 Ω ~ 0.49 Ω
Discharge temperature
thermistor (RT62)
Fin temperature
thermistor (RT64)
Measure the resistance between terminals using a tester.
(Winding temperature : -10 °C ~ 40 °C)
Compressor
W
U
V
WHT
RED
BLK
Measure the resistance between lead wires using a tester.
(Part temperature : -10 °C ~ 40 °C)
Outdoor fan motor
Measure the resistance using a tester. (Part temperature : -10 °C ~ 40 °C)
R. V. coil
Measure the resistance using a tester.(Part temperature : -10 °C ~ 40 °C)
Linear expansion valve
LEV
WHT
RED
YLW
BRN
ORN
BLU
Color of lead wire
Normal
WHT - RED
RED - ORN
YLW - BRN
BRN - BLU
37.4 Ω ~ 53.9 Ω
GA50/60VA
1.29 Ω ~ 1.49 Ω
GA71VA
U
RED
WHT
BLK
V
W
(W)
(V)
(U)
Normal
RED - BLK
BLK - WHT
WHT - RED
13.4 Ω ~ 16.4 Ω
Pressure
3.7 ± 0.15 MPa
4.8 MPa
Open
Close
0.05
0.1
+
-
High pressure switch
(HPS)
MUZ-GA60VA
-
MUZ-GA71VA
E3
Color of lead wire
Measure the resistance with a tester.
Refer to 11-7. “Test point diagram and voltage”,1. “Outdoor electronic
control P.C. board”, the chart of thermistor.
Measure the resistance with a tester.
Before measurement, hold the thermistor with your hands to warm it up.
Refer to 11-7. “Test point diagram and voltage”,1. “Outdoor electronic
control P.C. board”, the chart of thermistor.
Normal
1.32 kΩ ~ 1.62 kΩ
MUZ-GA60VA-
E3
2.6 kΩ ~ 3.3 kΩ
Other models
0.86 Ω ~ 1.06 Ω
GA60VA
-
E3
OB389F--2qxp 07.9.3 5:08 PM Page 35