Service manual

33
Part name Check method and criterion
Measure the resistance using a tester.
(Part temperature : -10°C ~ 40°C)
Defrost thermistor/
Ambient temperature
thermistor/ Outdoor heat
exchanger temperature
thermistor
Normal abnormal
5kΩ ~ 55kΩ
Open or short-circuit
Normal abnormal
100kΩ ~ 250kΩ
Opened or short-circuit
Normal abnormal
2.6kΩ ~ 3.3kΩ
Open or short-circuit
Normal
abnormal
0.40Ω ~ 0.49Ω
Open or short-circuit
Measure the resistance using a tester, after warming up the thermistor by holding by hand.
(Part temperature : 20°C ~ 40°C)
Discharge temperature
thermistor
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
Abnormal
Open or
short-circuit
37.4Ω ~ 53.9Ω
MUZ-GA50VA -
MUZ-GA60VA -
MUZ-GA71VA -
E1
E1
E1
MUZ-GA50/GA60VA
1.29Ω ~ 1.49Ω
MUZ-GA71VA
U
RED
WHT
BLK
V
W
(W)
(V)
(U)
Normal
RED - BLK
BLK - WHT
WHT - RED
Open or
short-circuit
(Not including
WHT - ORN)
13.4Ω ~ 16.4Ω
abnormal
Pressure Normal abnormal
Operation OFF
HPS1
3.7 ± 0.15MPa
4.8 MPa
Open
Short
Other than
those list-
ed at left
0.05
0.1
+
-
High pressure switch
(HPS)
MUZ-GA71VA
MUZ-GA71VA
Color of
lead wire
Normal abnormal
25kΩ ~ 100kΩ
Open or short-circuit
Measure the resistance using a tester.
(Part temperature : 10°C ~ 40°C)
Fin temperature thermistor
10-5. Trouble criterion of main parts
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