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
- Step 1: Check IGBT module cooling
Cooling adequate - Step 2: Reduce load or switching frequency
Temperature within rated range - Step 3: Verify thermal paste application
Paste properly applied
How to Reset
Reset via control panel after IGBT cools.
Source: Danfoss VLT FC-302 Operating Guide, Danfoss A/S
Category: PLC & VFD