OverVoltage

What does F5 mean?

This fault indicates that the DC bus voltage within the drive has exceeded its maximum allowable limit. Common causes include high incoming AC line voltage, transient voltage spikes, or regenerative energy from the motor, especially during rapid deceleration. Regenerative energy occurs when the motor acts as a generator, feeding power back into the drive. Ignoring this fault can lead to premature component degradation or catastrophic failure of the drive's power section.

Complete Troubleshooting Guide

1. 1

   Monitor the incoming AC line for high voltage conditions or transient spikes, especially during off-peak hours or when large loads are switched on/off nearby.

2. 2

   If the fault occurs during deceleration, extend the drive's deceleration time (e.g., P110 [Decel Time 1] or A402 [Decel Time 2]) to reduce the rate of energy regeneration.

3. 3

   Consider installing a dynamic braking resistor option if motor regeneration is significant and cannot be mitigated by extending deceleration times.