5.11
P1(Over voltage or too low voltage protection diagnosis and solution)
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
Troubleshooting and repair:
NO
YES
NO
YES
NO
YES
NO
YES
Page 83
Replace the reactor.
Check the connections and wires.
Ensure proper connections or
replace the wires.
While the unit is in standby,
Power on and measure the
voltage between P and N.
Replace the IPM board.
Replace outdoor PCB.
Trou
b
le
sho
oti
ng
