Danfoss FC-302 Error Code 9

Danfoss PLC & VFD Major Overload

Model: FC-302 | Code: 9

Applicable Systems
FC-30 FC-51 FC-101 FC-202 FC-302

Symptoms

Inverter overload protection tripped.

Possible Causes

  • Motor load too high
  • Acceleration time too short
  • Inverter undersized

Troubleshooting Steps

  1. Step 1: Check motor load
    Current within rated range
  2. Step 2: Increase acceleration time
    No overload trip
  3. Step 3: Verify inverter sizing
    Inverter properly sized

How to Reset

Reset via control panel after reducing load.

Related Danfoss Fault Codes

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Source: Danfoss VLT FC-302 Operating Guide, Danfoss A/S

Category: PLC & VFD