Overvoltage
Vacon · NX All-in-One Application
What does 2 mean?
A hardware trip (S1) has detected the DC-link voltage exceeding its safe limits. This can be caused by a deceleration time that is too short, high voltage spikes on the input power supply, or a rapid Start/Stop sequence. Subcode S2 indicates issues with overvoltage control supervision.
Common Causes
- Input voltage exceeds the maximum allowable limit (e.g., P1-12 > 480V).
- Power surge from the electrical grid.
- Faulty power supply unit generating excessive voltage.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Increase the deceleration time parameter in the drive settings to allow for slower motor braking.
- 2
If regenerative energy is an issue, consider installing an optional brake chopper and brake resistor system.
- 3
Activate or verify the settings of the drive's internal overvoltage controller.
- 4
Measure the input voltage at the drive's main power terminals to ensure it is within specified limits and stable.