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  1. Home
  2. Fault Codes
  3. Yaskawa SGDH
  4. A.41
A.41Alarm · Power sectionUsually repairable

Yaskawa SGDH A.41: Undervoltage

What A.41 means

The main circuit DC voltage dropped too low.

Symptoms

Alarm during acceleration or on supply dips.

Is it repairable?

Yes, when the SERVOPACK's power circuit is the cause.

Common causes

  • Low or missing supply voltage
  • Supply dips
  • Failed rectifier or capacitors

Safe checks

  1. 1Measure the main circuit supply voltage under load

Drives hold dangerous voltage after power-off. Checks should only be done by qualified personnel, with power isolated and the DC link discharged.

Reviewed by AutomIQ repair technicians. Code and name from the Yaskawa SGDH SERVOPACK manual.

Related Yaskawa SGDH faults

  • A.10Overcurrent or Heat Sink Overheated
  • A.30Regeneration Error Detected
  • A.40Overvoltage
  • A.71Overload: High Load
  • A.81Encoder Backup Error
  • A.C9Encoder Communications Error
All 49 Yaskawa SGDH codes

Still showing A.41?

SGDH SERVOPACK showing an alarm?

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Fault codes
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