Sinclair SCV-EB Series Service Manual page 69

5.23 P3 Troubleshooting
5.23.1 Digital display output
5.23.2 Description
 Compressor current protection.
 Error code is displayed on the refrigerant system PCB digital tube and user interface..
5.23.3 Procedure
High pressure switch protection
The power supply is abnormal
Replace refrigerant system PCB
Notes:
1. Set a multi-meter to buzzer mode and test any two terminals of P N and U V W of the inverter module. If the buzzer sounds, the inverter module has
short-circuited.
2. The normal resistances of the inverter compressor are 0.7-1.5Ω among U V W and infinite between each of U V W and ground. If any of the resistances
differ from these specifications, the compressor has malfunctioned.
P3
No
No
Yes
Refer to P1 trouble shooting
Yes
Check the power supply equipment
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