Sinclair SCV-50EA Service Manual page 83

P5: Condenser high temperature protection
When condenser temperature is higher than 62 degrees, the unit will stop operating. When pipe temperature outside is
lower than 52 degrees, the unit will resume operate.
LED displays P5
Condenser high temperature protection
Check whether condenser temperature is higher than 62
degrees
Check whether the resistance of condenser
temperature sensor is correct.
Replace the outdoor main PCB.
Clean heat exchanger
Replace EXV and then use high pressure
nitrogen to blow the pipe. Vacuumed the
pipe then add the refrigerant again.
NO
NO
YES
YES
Stop the unit
YES
YES
Replace the temperature sensor
Whether outdoor temperature is too high(higher than 48
Whether heat exchanger needs cleaning.
Check if the EXV is blocked or not.
Replace outdoor main PCB.
81
YES
degrees)or not.
NO
NO
NO