Sinclair SCV-750EB Service Manual page 135

5.30 bH troubleshooting
Digital display output
Description
bH indicates adhesion of compressor relay or PED board damaged.

All units stop running.

Error code is only displayed on main PCB and user interface.

Possible causes
Power on within 5min after power off

PED board damaged

Adhesion of compressor relay

Compressor module board damaged

Procedure
Power on within 5min after power off
Replace PED board to check whether error
Check whether compressor relay is stick
Replace compressor module board
Notes:
3. Dial switch S12_2 on the main PCB
Switch
S12
S12-2
bH
No
disappears
No
No
Description
Water pump
Yes
Power on after 5min after power off
Yes
Unit become normal
Yes
Replace compressor module board
ON
Multiple pumps
control
Default factory
OFF
setting
Single pump
OFF
control
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