Mitsubishi Electric PAC-MK34BC, Техническое и сервисное руководство

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15
OCH744
7 TROUBLESHOOTING
7-1. HOW TO CHECK THE PARTS
BRANCH BOX: PAC-MK54BC PAC-MK34BC
Parts name Checkpoint
Thermistor (TH-A–E)
<Gas pipe>
Disconnect the connector then measure the resistance with a tester.
(At the ambient temperature 10 to 30°C)
Thermistor R0=15k
"
± 3%
Fixed number of B=3480 ± 2%
Rt=15exp { 3480 ( ) }
10°C 9.7 k
"
15°C 7.9 k
"
20°C 6.4 k
"
25 °C 5.3 k
"
30°C 4.4 k
"
< Thermistor for lower temperature >
Temperature (°C)
Resistance (k
"
)
10 15 20 25 30
0
2
4
6
8
10
12
Linear expansion valve
( LEV-A–E )
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
1
2
3
4
5
M
Blue
Yellow
Orange
Red
White
Disconnect the connector then measure the resistance with a tester.
(Winding temperature 20°C)
Normal Abnormal
Red - White Red - Orange Red - Yellow Red - Blue
Open or short
46 ± 4Ω
1
273+t
1
273