Troubleshooting
Electrical Control System 219
2.4.2.15. P5 malfunction
When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe
temp. less than 52°C.
P5 display
High temperature protection of
condenser
Check whether the
condenser temperature is
more than 65°C
Yes
Judge 1: Check whether the
outdoor ambient
temperature is higher than
50℃
No
Judge 3: The refrigerant
pipe is blocked
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
Yes
Judge 2: Check whether the
heat exchanger is dirty
No
Clean the heat exchangerYes
Replace outdoor main boardYes
Check whether the
resistance of condenser
temp. sensor is correct
refer to the Appendix 1
Replace the temperature sensor
Stop the unit
Yes
No
No
No
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