ACI/AUX TRIP

This fault indicates that the main breaker is off, as well as the AC Rectifier which charges the DC bus of the unit. A break in the E-Stop chain will also engage this fault.

If all E-Stops (or door switches or cap pressure switches) are cleared, then engage the main breaker, and pressing Reset will start the AC Rectifier, charge the DC bus, and clear this fault, making the inverter ready for Heat On operation.

This fault also indicates a loss of a phase/wrong rotation on the input 3-phase voltage to the main breaker. Check the lost phase detector next to the main breaker, if the red fault LED is on, a lost/wrong phase situation is present.

VIPs