A0503 alarm in siemens micromaster 440 or MM440 drive

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 How can resolve problem A0503 alarm in siemens micromaster 440 or MM440 drive ?

Cause : UnderVoltage Limit

- Main supply failed
- Main supply (P0210) and consequently DC-link voltage (r0026) below specified limit (refer to parameter r0026).
Overvoltage can be caused either by too high main supply voltage or if motor is in regenerative mode.

Diagnosis & Remedy - Check main supply voltage (P0210).

Click here for more information

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