Test Operation & Troubleshooting & Maintenance
Sensing circuit error or current sensor error
Radiator or IPM or PFC module overtemperature
Radiator or IPM or PFC module temperature sensor error
Incorrect AC voltage input
Drive board temperature sensor error
AC contactor protection or input zero crossing error
Temperature drift protection
Current sensor connection protection (current sensor not
connected to phase U/V)
Communication error to the outdoor unit
Communication error to the indoor unit
Communication error to the drive