Sinclair SCV-750EB Service Manual page 87

5.10 P0 Troubleshooting
Digital display output
Description
Discharge pipe high pressure or discharge temperature switch protection. When the discharge pressure rises above 4.2MPa

or discharge temperature rises above 115°C, the system displays P0 protection and all units stop running. When the
discharge pressure falls below 3.2MPa or discharge temperature fall below 90°C, P0 is removed and normal operation
resumes. When P0 error occurs 3 times in 60 minutes, a manual system restart is required before the system can resume
operation.
Error code is displayed on main PCB and user interface.

Possible causes
High pressure switch or discharge temperature switch not connected properly or has malfunctioned.

Excess refrigerant.

System contains air or nitrogen.

High pressure side blockage.

 Poor condenser heat exchange.
 Main PCB damaged.
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