Danfoss FC-302 Error Code 42

Danfoss PLC & VFD Major Overtemperature

Model: FC-302 | Code: 42

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

Symptoms

IGBT temperature exceeds rated limit.

Possible Causes

  • IGBT module overheating
  • Cooling system inadequate
  • Excessive load at high switching frequency

Troubleshooting Steps

  1. Step 1: Check IGBT module cooling
    Cooling adequate
  2. Step 2: Reduce load or switching frequency
    Temperature within rated range
  3. Step 3: Verify thermal paste application
    Paste properly applied

How to Reset

Reset via control panel after IGBT cools.

Related Danfoss Fault Codes

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

Category: PLC & VFD