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8 --- Compressor Top – High temperature protection diagnosis and solution (P2)
Error Code
P2
Malfunction conditions
If the sampling voltage is not 5V, the LED will display the failure.
Possible Causes
• Power supply problems
• System leakage or block
• Defective PCB
Trouble shooting:
Is the air flow system of the
indoor and outdoor unit
obstructed?
Clear the air inlet and outlet and/or the heat
exchanger of indoor and outdoor units.
Yes
No
Yes
Yes
Turn off the power supply and turn
it on 10 minutes later.
Check if the unit can
start normally.
No
Check if the refrigerant
charge volume is normal?
Recharge the correct
refrigerant volume.
Refrigerant system is blocked, such
as capillary or welded point of pipes.
Yes
Check if all the connections, especially
the connection of OLP (Over Load
Protector) sensor is good.
Correct the connection.
No
Measure the resistance
between the two ports o f
the OLP. Is it zero?
Yes
Replace the OLP.
No
Replace the outdoor control PCB.
Yes
No
A14488
