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Service Procedures
3
SM830063
(12) Symptom: LCD on the remote controller displays “CHECK P02”. (Compressor / outdoor fan protection thermostat)
1. Troubleshooting
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0342_M_I
Start
Check the power breaker etc.
and repair.
Replace the outdoor unit PCB.
Is the outdoor fan wire winding
protection thermostat (49FO) off?
Replace the outdoor fan.
Is there connector contact defect?
Replace the outdoor unit PCB.
Correct the connection
Is the power supply to the outdoor
unit normal?
(Voltage defective phase?)
Is there 220-240 V AC between
CN52-2 and CN40-3 of the
outdoor unit PCB?
Are the compressor protection
thermostats (49C1 and 49C2) off?
• No gas
• High load
• 4-way valve defect
• Clogged refrigerant circuit
• Electronic refrigerant control valve
defect (indoor unit)
• Outdoor fan defect (heating)
• Loose from discharge temperature
sensor holder
• Liquid line valve defect