Sinclair SCV-EB Series Service Manual page 46

5.3 C7 Troubleshooting
5.3.1 Digital display output
5.3.2 Description
 High temperature protection of inverter module
 Heat pump stops running.
 Error code is displayed on the refrigerant system PCB digital tube and user interface.
5.3.3 Procedure
Power supply voltage is too high or too
Poor ventilation at installation position
Fin coil heat exchanger is filth blockage
Fan motor damage or abnormal speed
The location of heat pump is near the
place where temperature is too high
Replace inverter module PCB
44
C7
low
No
No
No
No
No
Adjust the power supply and make sure
Yes
the power supply is stable
Install the heat pump in the place with
Yes
good ventilation.
Yes
Clean the fin coil heat exchanger.
Yes
Refer to H6 trouble shooting.
Make sure heat pump is away from high
temperature heat source.