Mitsubishi Electric PUZ-A12NKA7 Service Manual page 52

10-6. HOW TO CHECK THE PARTS
PUZ-A12NKA7
PUZ-A36NKA7
PUZ-A12NKA7-BS
PUZ-A36NKA7-BS
PUY-A12NKA7
PUY-A36NKA7
PUY-A12NKA7-BS
PUY-A36NKA7-BS
Parts name
Thermistor (TH3)
Disconnect the connector then measure the resistance with a tester.
<Liquid>
(At the ambient temperature 50 to 86°F [10 to 30:])
Thermistor (TH4)
<Discharge>
Thermistor (TH6)
< 2-phase pipe>
Thermistor (TH7)
<Ambient>
Thermistor (TH8)
<Heat sink>
Thermistor (TH32)
<Suction>
Thermistor (TH33)
<Comp. surface>
Fan motor (MF1,MF2) Refer to "10-6-5. Check method of DC fan motor (fan motor/ outdoor controller circuit board)".
Measure the resistance between the terminals with a tester.
Solenoid valve coil
(At the ambient temperature 68°F [20:])
<4-way valve>
(21S4)
Motor for compressor (MC)
Measure the resistance between the terminals with a tester.
(Winding temperature 68°F [20:])
U
V
W
Measure the resistance between the conector pins with a tester.
(At the ambient temperature 20ºC)
Red (Red)
Note that the resistance between the connector pins may vary depending on the ambient temperature,
1
so use those values as reference.
2
3
M
Black (Blue)
4
White (Brown)
5
PUZ-A12/18NKA7
Yellow (Orange)
6
Blue (White)
7
PUZ-A24/30NHA7
PUZ-A36/42NKA7
Note: The colors in parentheses
are for A36/42 models.
*OL : Over Load
Linear expansion valve (LEV-A)
Disconnect the connector then measure the resistance with a tester.
For A12–30
(Winding temperature 68°F [20:])
Red
M
1
Blue 2
Orange
3
Yellow
4
White 5
Linear expansion valve (LEV-A)
Disconnect the connector then measure the resistance with a tester.
For A36, 42
(Winding temperature 68°F [20:])
Gray
M
1
Orange
2
Red
3
Yellow
4
Black 5
OCH636A
PUZ-A18NKA7
PUZ-A42NKA7
PUZ-A18NKA7-BS
PUZ-A42NKA7-BS
PUY-A18NKA7
PUY-A42NKA7
PUY-A18NKA7-BS
PUY-A42NKA7-BS
Normal
TH4
160 to 410 k"
TH33
TH3
TH6
4.3 to 9.6 k"
TH7
TH32
TH8 39 to 105 k"
A12–30
2350 i 170 "
Normal
A12, 18
A24, 30
1.34 "
0.64 "
Red - Black
OL*
Red - Black
1.1 ± 0.6 MΩ
Red - Blue
1.1 ± 0.6 MΩ
Red - White Red - Orange
Gray - Black Gray - Red
PUZ-A24NHA7
PUZ-A24NHA7-BS
PUY-A24NHA7
PUY-A24NHA7-BS
Check points
Abnormal
Open or short
Normal
A36, 42
1435 i 150 "
A36, 42
0.88 "
Normal
White - Black Yellow - Black Blue - Black
1.2 ± 0.6 kΩ 200 ±100 kΩ
White - Black Yellow - Black Blue - Black
1.2 ± 0.6 kΩ 200 ± 100 kΩ
Brown - Blue Orange - Blue White - Blue
40 ± 20 MΩ 220 ± 110 MΩ
Normal
Brown - Yellow
46 i 4 "
Normal
Gray - Yellow
46 i 3 "
52
PUZ-A30NHA7
PUZ-A30NHA7-BS
PUY-A30NHA7
PUY-A30NHA7-BS
Abnormal
Open or short
Abnormal
Open or short
Abnormal
Open or short
(short, for White - Blue)
OL
Open or short
(short, for White - Blue)
OL
Open or short
(short, for White - Blue)
Open
Abnormal
Brown - Blue
Open or short
Abnormal
Gray - Orange
Open or short