54 CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
Troubleshooting
5.5.11 P1 (High / Low voltage protection diagnosis and solution)
Description: Voltage fluctuations are detected.
Possible defects:
• Power supply issues
• System leakage or blockage
• Faulty PCB
Troubleshooting and repair:
YES
YES
YES
YES
NO
NO
NO
NO
Check the connections and wires.
Check the power supply.
Power on and measure the voltage between
P and N.
Is it in working range?
Check the reactor.
Replace outdoor PCB.
Replace the IPM board.
Turn off the unit.
Ensure proper connections or
replace the wires.
Replace the reactor.
Are they correctly
connected?
Is it in working range?
The voltage between P and N is:
- During standby: DC 310V,340V or 380V
- During start-up: 220V~400V
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