OverVoltage

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This fault signals that the AC line voltage or the DC bus voltage has exceeded its maximum permissible level. High line voltage, transient conditions, or motor regeneration (motor acting as a generator during deceleration) are common causes. Overvoltage can damage drive components.

• Input supply voltage has exceeded the maximum acceptable level.
• Overvoltage condition on the DC bus, often during braking.
• External power source overvoltage.
• High voltage detected at the input terminals (P1-10).

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1. 1

   Measure the incoming AC line voltage at the drive input terminals (L1, L2, L3) to verify it is within the drive's rated input voltage range.

2. 2

   Measure the DC bus voltage at terminals +UDC/-UDC to confirm it is within acceptable limits.

3. 3

   If the fault occurs during deceleration, increase parameter P040 [Decel Time1] or A068 [Decel Time2] to extend the motor deceleration time.

4. 4

   Consider installing a dynamic brake option (resistor and chopper) if persistent regeneration is the root cause.