Undervoltage Fault (Controlled Stop, Adv. Code 2)
Vacon · X4 AC Drive
What does F32 mean?
This fault occurs when the drive detects an undervoltage condition and is configured for 'Controlled' power loss response via parameter 525. The drive decelerates the motor while attempting to regulate the bus voltage, but faults if it reaches a stopped condition. This signifies a sustained undervoltage that exceeds the drive's ride-through capability, leading to a controlled shutdown.
Complete Troubleshooting Guide
- 1
Verify the incoming line power is stable and consistently within the drive's specified operating range.
- 2
If frequent undervoltage events occur, consider installing input reactors or an Uninterruptible Power Supply (UPS) for critical applications.
- 3
Review parameter 525 (Power Fail Config); if an undervoltage fault upon stopping is not desired, consider setting it to 'ContrNoMsg'.
- 4
If regenerative loads are present, assess if they are causing bus overvoltage during deceleration, which could interact with undervoltage ride-through attempts.