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16.3.9 High temperature protection of compressor top diagnosis and solution (P2)
Error Code
P2
Malfunction decision
conditions
If the sampling voltage is not 5V, the LED will display the failure.
Supposed causes
● Power supply problems.
● System leakage or block
● PCB faulty
Trouble shooting:
Check the air flow system
of indoor and outdoor units
Clear up the air inlet and outlet or the heat
exchanger of indoor and outdoor units.
Yes
No
Yes
Yes
Power off, then restart the unit
10 minutes later
Check if the temperature
of compressor
No
Check refrigerant system
Yes
Check the overload
protector
Correct the connection.No
Measure the resistance
between the two ports of
the OLP. Is it zero?
Yes
Replace the OLP.No
Replace the outdoor control PCB.
Yes
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