Overvoltage

What does 2 mean?

The DC-link voltage has exceeded its predefined limits. This often occurs due to overly short deceleration times during motor stopping, or significant overvoltage spikes originating from the mains supply. For 400-500Vac mains, a fault trips at 911Vdc (warning at 860Vdc); for 500-690Vac mains, a fault trips at 1250Vdc (warning at 1150Vdc). Subcodes S1 (hardware trip) and S2 (overvoltage control supervision) provide additional diagnostic context.

• DC bus voltage exceeding maximum limits during regeneration.
• Incorrect braking resistor selection or connection.
• Power grid voltage significantly higher than nominal.
• Parameter P1-03 (Max voltage) set too low.

Click steps to track your progress.

1. 1

   Increase the deceleration time parameter in the drive configuration to allow for slower motor braking.

2. 2

   Install a brake chopper and/or brake resistor if not already present, or verify their operation if installed. For INU devices, ensure overvoltage control is set to active.

3. 3

   Measure the incoming AC supply voltage at the drive input terminals to check for transient spikes or sustained high voltage.