Applicable Systems
FC-30
FC-51
FC-101
FC-202
FC-302
Symptoms
DC link voltage exceeds overvoltage limit.
Possible Causes
- Deceleration time too short
- Regenerative energy too high
- Brake resistor missing or open
Troubleshooting Steps
- Step 1: Increase deceleration time
No overvoltage trip - Step 2: Connect brake resistor or chopper
DC link voltage controlled - Step 3: Check mains supply voltage
Voltage within rated range
How to Reset
Reset via control panel after resolving overvoltage.
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Source: Danfoss VLT FC-302 Operating Guide, Danfoss A/S
Category: PLC & VFD
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