Applicable Systems
FC-30
FC-51
FC-101
FC-202
FC-302
Symptoms
Brake resistor overtemperature detected.
Possible Causes
- Brake resistor undersized
- Excessive regenerative duty
- Resistor cooling inadequate
Troubleshooting Steps
- Step 1: Check resistor sizing
Resistor properly sized - Step 2: Reduce regenerative duty cycle
Duty cycle within rated range - Step 3: Improve resistor cooling
Temperature within rated range
How to Reset
Reset via control panel after resistor cools.
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Source: Danfoss VLT FC-302 Operating Guide, Danfoss A/S
Category: PLC & VFD
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