Mitsubishi Electric PUY-A12NKA7, Service Manual

Page: 52 / 120

52
Parts name
Check points
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 50 to 86°F [10 to 30
:
])
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 68°F [20
:
])
Note that the resistance between the connector pins may vary depending on the ambient temperature,
so use those values as reference.
Measure the resistance between the conector pins with a tester.
(At the ambient temperature 20ºC)
Thermistor (TH3)
<Liquid>
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
< 2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat sink>
Thermistor (TH32)
<Suction>
Thermistor (TH33)
<Comp. surface>
Normal
39 to 105 k
"
TH4
TH33
TH3
TH6
TH7
TH32
TH8
Abnormal
Open or short
Normal
Red - White Red - Orange
Brown - Yellow
Brown - Blue
Abnormal
46
i
4
"
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)
Linear expansion valve (LEV-A)
For A12–30
Linear expansion valve (LEV-A)
For A36, 42
Normal
Abnormal
Open or short
A12–30 A36, 42
Open or short
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 68°F [20
:
])
Refer to “10-6-5. Check method of DC fan motor (fan motor/ outdoor controller circuit board)”. Fan motor (MF1,MF2)
2350
i
170
"
1435
i
150
"
A12, 18
A36, 42
0.64
"
A24, 30
1.34
"
0.88
"
Measure the resistance between the terminals with a tester.
(Winding temperature 68°F [20
:
])
Normal Abnormal
Open or short
W
V
U
Normal
Gray - Black Gray - Red
Gray - Yellow
Gray - Orange
Abnormal
46
i
3
"
Open or short
160 to 410 k
"
4.3 to 9.6 k
"
1
2
3
4
5
M Red
Blue
Orange
Yellow
White
Normal
PUZ-A12/18NKA7
PUZ-A24/30NHA7
PUZ-A36/42NKA7
Red - Black
OL*
White - Black
1.2 ± 0.6 kΩ
Yellow - Black
200 ±100 kΩ
Blue - Black
OL
Open or short
(short, for White - Blue)
Open or short
(short, for White - Blue)
Open or short
(short, for White - Blue)
Red - Black
1.1 ± 0.6 MΩ
White - Black
1.2 ± 0.6 kΩ
Yellow - Black
200 ± 100 kΩ
Blue - Black
OL
Red - Blue
1.1 ± 0.6 MΩ
Brown - Blue
40 ± 20 MΩ
Orange - Blue
220 ± 110 MΩ
White - Blue
Open
Abnormal
1
2
3
4
5
M
Gray
Orange
Red
Yellow
Black
M
1
2
3
4
5
6
7
Red (Red)
Black (Blue)
White (Brown)
Yellow (Orange)
Blue (White)
Note: The colors in parentheses
are for A36/42 models.
*OL : Over Load
10-6. HOW TO CHECK THE PARTS
PUZ-A12NKA7 PUZ-A18NKA7 PUZ-A24NHA7 PUZ-A30NHA7
PUZ-A36NKA7 PUZ-A42NKA7
PUZ-A12NKA7-BS PUZ-A18NKA7-BS PUZ-A24NHA7-BS PUZ-A30NHA7-BS
PUZ-A36NKA7-BS PUZ-A42NKA7-BS
PUY-A12NKA7 PUY-A18NKA7 PUY-A24NHA7 PUY-A30NHA7
PUY-A36NKA7 PUY-A42NKA7
PUY-A12NKA7-BS PUY-A18NKA7-BS PUY-A24NHA7-BS PUY-A30NHA7-BS
PUY-A36NKA7-BS PUY-A42NKA7-BS
OCH636A