Instantaneous Power Failure

What does E.IPF mean?

This fault indicates that the FR-A800 inverter detected an instantaneous loss or significant sag of the incoming AC power supply voltage. The inverter has tripped to protect itself and the motor from unstable operation.

• Momentary interruption or significant voltage sag in the main AC power supply.
• Loose power supply wiring or poor contact at the main circuit breaker/contactor.
• Overloaded power supply causing voltage dips.
• Sensitivity setting for instantaneous power failure detection (e.g., parameter F014 (Pr.15)) is too high.

Click steps to track your progress.

1. 1

   Check the incoming AC power supply for stability and voltage fluctuations using a multimeter or power quality analyzer.

2. 2

   Inspect all main power circuit wiring and connections (R1/L11, S1/L21, T1/L31) to the FR-A800 inverter, including the upstream circuit breaker and contactor.

3. 3

   Ensure the power supply capacity is adequate for the FR-A800 inverter and its connected load.

4. 4

   Adjust instantaneous power failure detection parameters (e.g., F014 (Pr.15) (Instantaneous power failure detection level)) if the trip is too sensitive to normal power fluctuations.

5. 5

   Consider implementing a ride-through function (if available and configured) or a UPS for critical applications if momentary power failures are common.