Applicable Systems
FC-30
FC-51
FC-101
FC-202
FC-302
Symptoms
Undervoltage warning: DC link voltage approaching trip limit.
Possible Causes
- Input voltage low
- Transient power dip
- Heavy load causing voltage sag
Troubleshooting Steps
- Step 1: Measure input voltage
Voltage within rated range - Step 2: Check for transient dips
Voltage stable - Step 3: Verify DC link voltage
Voltage above warning threshold
How to Reset
Auto-clear when voltage recovers.
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Source: Danfoss VLT FC-302 Operating Guide, Danfoss A/S
Category: PLC & VFD
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