Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Output phase loss: motor phase missing detected.
Possible Causes
- Motor winding open circuit
- Output cable broken
- Drive output IGBT not switching
Troubleshooting Steps
- Step 1: Check output cable continuity
All phases have continuity - Step 2: Measure motor winding resistance
All phases balanced - Step 3: Test drive output
All phases switching
How to Reset
Reset via control panel after fixing output phase.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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