SG-40MAHB-01: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
31
DIAGNOSIS AND SOLUTION (CONT)
High temperature protection of compressor top diagnosis and solution (P2)
Malfunction Decision Conditions
If the sampling voltage is not 5V, the LED displays a failure.
Possible Causes:
• Power supply problems
• System leak or blockage
• PCB faulty
Troubleshooting
Check the air flow system
of the indoor and outdoor units.
Clear up the air inlet and outlet or the heat
exchanger of the indoor and outdoor units.
Yes
No
Yes
Yes
Power off, then restart the unit 10
minutes later.
Check the
compressor temperature.
No
Check the 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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