Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Brake fault detected.
Possible Causes
- Brake resistor open circuit
- Brake chopper failure
- Brake resistor overheated
Troubleshooting Steps
- Step 1: Check brake resistor
Resistor within rated value - Step 2: Inspect brake chopper
Chopper functional - Step 3: Verify resistor sizing
Resistor properly sized
How to Reset
Reset via control panel after brake repair.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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