Sinclair SCV-EB Series Service Manual page 55

5.11 F6 Troubleshooting
5.11.1 Digital display output
5.11.2 Description
 EXV1 fault
 Heat pump stops running.
 Error code is displayed on the refrigerant system PCB digital tube and user interface.
5.11.3 Procedure
The EEV1 connector of the refrigerant
system PCB is loose or not inserted
Replace the coil of electronic expansion
F6
No
valve
Yes
Ensure the connection is well
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