Sinclair SCV-750EB Service Manual page 117

Procedure
The inverter compressor module
The screws connecting the heat sink to the
inverter module are loose
Fan motor wiring connection is wrong
Replace outdoor main PCB
Notes:
1. Refer to Part 4, 1 "Electric Control Box Layout".
PL/C7
1 heat sink
is blocked or dirty
No
1
No
No
Yes
Clean or replace the heat sink
Tighten the screws and make sure the heat
Yes
sink is well-connected
Yes
Check the fan motor wiring connection
115