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[8-9 Troubleshooting Problems with Major Components on BC Controller ]
1) For the connectors on the board, TH11 and TH12 are connected to CN10, and TH15 and TH16 are connected to CN11. Dis-
connect the connector in trouble, and check the sensor of each number.
2)
Pull out the sensor connector from the I/O board, Do not pull the sensor by holding the lead wire.
Measure the resistance with such as a tester.
Compare the measured value with that of shown in the table below. When the result is
3) Check the self-diagnosis switch (Outdoor control board SW4 and SW6).
J, JA, KA
(Standard / main)
KB
(Sub 1)
KB
(Sub 2)
KB
(Sub 3)
ON
1
2
3
4
5
6
7
8
9 10
HWE18220_GB
Measurement data
Symbol
Liquid inlet
TH11
temperature
Bypass outlet
TH12
temperature
Bypass inlet
TH15
temperature
Bypass inlet
TH16
temperature
Bypass outlet
TH12
temperature
Bypass inlet
TH15
temperature
Bypass inlet
TH16
temperature
Bypass outlet
TH12
temperature
Bypass inlet
TH15
temperature
Bypass inlet
TH16
temperature
Bypass outlet
TH12
temperature
Bypass inlet
TH15
temperature
Bypass inlet
TH16
temperature
The figure at left shows that the switches 1 through 5 are set to ON and 6 through 10 are set to OFF.
SW4 setting value
SW6 setting value
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
2
3
4
5
6
7
8
9 10
2
3
1
1
ON
ON
2
3
4
5
6
7
8
9 10
2
3
1
1
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
2
3
4
5
6
7
8
9 10
2
3
1
1
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
2
3
4
5
6
7
8
9 10
2
3
1
1
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
ON
ON
2
3
4
5
6
7
8
9 10
2
3
1
1
ON
ON
1
2
3
4
5
6
7
8
9 10
1
2
3
10%, it is normal.
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
4
5
6
7
8
9 10
chapter 8 -
33
- Quick Links:
- Error Code [4114]
- Error Code [6840]
Hide quick links:
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Troubleshooting
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