Mitsubishi Electric MXZ-4C36NAHZ Technical & Service Manual page 109

8-6. HOW TO CHECK THE PARTS
OUTDOOR UNIT:
MXZ-4C36NAHZ
MXZ-4C36NAHZ-U1
MXZ-8C60NA-U1
Parts name
Thermistor (TH3) Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 50 to 80 F [10 to 30 :])
<Outdoor liquid pipe>
Thermistor (TH4)
<Compressor>
Thermistor (TH6)
<Suction pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat Sink>
* TH8 is internal thermistor of power module. (Y)
Fan motor (MF1, MF2)
Measure the resistance between the conector pins with a tester.
(At the ambient temperature 20:)
Red
1
2
3
M
Blue
4
Brown
5
Orange
6 1.1 ± 0.05 M"
White
7
Solenoid valve coil Measure the resistance between the terminals with a tester.
(At the ambient temperature 68°F [20 :])
<4-way valve>
(21S4)
Motor for compressor Measure the resistance between the terminals with a tester.
(Winding temperature 68°F [20 :])
(MC) U
V
W
Solenoid valve coil
Measure the resistance between the terminals with a tester.
(At the ambient temperature 68°F [20 :])
<Bypass valve>
(SV1)
<Switching valve>
(SV2)**
Linear expansion Valve
(LEV-A)
Gray
M
1
Gray - Black
Orange
2
Red
3
Yellow
4
Black
5
Linear expansion Valve
(LEV-B)
Red
M 1
Blue
2
Orange
3
Yellow
4
White
5
**MXZ-NAHZ only
OCH573E
MXZ-5C42NAHZ
MXZ-5C42NAHZ-U1
Normal
TH4 160 to 410 k"
TH3
TH6 4.3 to 9.6 k"
TH7
TH8*
39 to 105 k"
Red - Blue Brown - Blue
40 ± 4 k"
Normal
1567.5 ± 156.8 "
Normal
0.305 " ± 0.015 "
Normal
1197 ± 10 "
Gray - Red
Red - White Red - Orange
MXZ-8C48NAHZ
MXZ-8C48NAHZ-U1
Check points
Abnormal
Open or short
Normal
Orange - Blue White - Blue
220 ± 22 k"
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
Normal
Gray - Yellow Gray - Orange
46 ± 3 "
Normal
Red - Yellow Red - Blue
46 ± 4 "
MXZ-8C48NA
MXZ-8C48NA-U1
Abnormal
Open or short
(Short, for White - Blue)
Open
Abnormal
Open or short
Abnormal
Open or short