Mitsubishi MXZ-4C36NAHZ - Component Inspection and Testing

109
8-6. HOW TO CHECK THE PARTS
OUTDOOR UNIT:
MXZ-4C36NAHZ MXZ-5C42NAHZ MXZ-8C48NAHZ MXZ-8C48NA
MXZ-4C36NAHZ-U1 MXZ-5C42NAHZ-U1 MXZ-8C48NAHZ-U1 MXZ-8C48NA-U1
MXZ-8C60NA-U1
1
2
3
4
5
Gray
Orange
Red
Yellow
Black
1
2
3
4
5
Red
Blue
Orange
Yellow
White
M
M
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 50 to 80˚F [10 to 30 :])
Thermistor (TH3)
<Outdoor liquid pipe>
Thermistor (TH4)
<Compressor>
Thermistor (TH6)
<Suction pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat Sink>
Normal
160 to 410 k"
4.3 to 9.6 k"
39 to 105 k"
TH4
TH3
TH6
TH7
TH8*
Abnormal
Open or short
Measure the resistance between the terminals with a tester.
(At the ambient temperature 68°F [20
: ])
Solenoid valve coil
<4-way valve>
(21S4)
Motor for compressor
(MC)
Measure the resistance between the terminals with a tester.
(At the ambient temperature 68°F [20
: ])
Normal
1197 ± 10 "
Abnormal
Open or short
Solenoid valve coil
<Bypass valve>
(SV1)
<Switching valve>
(SV2)**
Linear expansion Valve
(LEV-A)
Linear expansion Valve
(LEV-B)
Refer to next page. Fan motor (MF1, MF2)
Measure the resistance between the terminals with a tester.
(Winding temperature 68°F [20 : ])
W
V
U
* TH8 is internal thermistor of power module. (Y)
Normal
1567.5 ± 156.8 "
Abnormal
Open or short
Normal
Abnormal
Open or short
0.305 " ± 0.015 "
Normal
Gray - Black Gray - Red
Gray - Yellow
Gray - Orange
Abnormal
46 ± 3 "
Open or short
Normal
Red - White Red - Orange
Red - Yellow
Red - Blue
Abnormal
46 ± 4 "
Open or short
**MXZ-NAHZ only
OCH573C