17
OCH664
7
TROUBLESHOOTING
7-1. HOW TO CHECK THE PARTS
BRANCH BOX : PAC-MK53BC
PAC-MK33BC
PAC-MK53BCB PAC-MK33BCB
Parts name
Check points
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 R
0
=15k
"
± 3%
Fixed number of B=3480
± 2%
Rt=15exp { 3480( ) }
10
:
9.7 k
"
15
:
7.9 k
"
20
:
6.4 k
"
25
:
5.3 k
"
30
:
4.4 k
"
< Thermistor for lower temperature >
Temperature (
:
)
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
Summary of Contents for PAC-MK33BC
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