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Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
35
DIAGNOSIS AND SOLUTION (CONT)
Over voltage or too low voltage protection (PC01)
Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit.
Recommended parts to prepare:
• Power supply issues
• System leakage or blockage
• Faulty PCB
• Reactor
Troubleshooting and Repair:
Check the power supply.
Is it in working order ?
NO
Check the connections and wires.
YES
Are they in working order ?
Ensure proper connections or
replace the wires.
NO
Power on and measure the
voltage between P and N.
YES
Replace the IPM board.NO
Check the reactor.
YES
Is it in working order ?
Replace outdoor PCB.NO
Replace the reactor.
YES
While the unit is in STANDBY
mode, is the voltage between P and N
around DC 310V, 340V, or 380V?
When starting the unit, is the unit
in the 220V~400V range?
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