Mitsubishi Electric HP120TNU-A Service Handbook page 280

[8-9 Troubleshooting Problems with Major Components on BC Controller ]
Self-diagnosis LED
J, JA, KA
(Standard
/ main)
KB
(Sub 1)
KB
(Sub 2)
KB
(Sub 3)
KB
(Sub 4)
KB
(Sub 5)
KB
(Sub 6)
KB
(Sub 7)
KB
(Sub 8)
KB
(Sub 9)
KB
(Sub 10)
KB
(Sub 11)
ON
1 2 3 4 5 6 7 8 9 10
HWE18220_GB
Measurement data Symbol
LEV1 opening -
LEV3 opening -
LEV4 opening
-
(JA and KA only)
BC controller bypass
SH12
outlet superheat
BC controller
intermediate part
SC16
subcool
BC controller
SC11
liquid-side subcool
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
LEV3 opening -
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
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
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
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
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
1 2 3 4 5 6 7 8 9 10 1 2 3
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
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 -
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