P1 Error CodeUpdated an hour ago

P1 Error Code: Overvoltage / Undervoltage Protection

1. The system monitors the supply voltage between L and N. If the voltage rises above 260 V AC or drops below 150 V AC, it displays error code "P1." The system returns to its previous operating state when the voltage rises above 155 V AC.
2. The system monitors the DC bus voltage across the large electrolytic capacitor on the outdoor unit PCB. If the voltage rises above 420 V DC or drops below 150 V DC, the system stops displaying error code "P1". The system returns to its previous operating state when the voltage is between 190 V DC and 410 V DC.