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TP48200A-DT19D1 Telecom Power User Manual

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AC Phase Failure

AC Phase Failure

Possible Causes

  • The AC input power cable is faulty.
  • Rectifier connections are loose.
  • The SMU is faulty.


  1. Check whether the AC input power cable is correctly and securely installed. If not, reinstall the cable. If the insulation layer of the cable is damaged, replace the cable.
  2. Check whether a short circuit exists in the AC input power cable or the insulation layer is damaged. If so, replace the cable.
  3. If the AC input is normal and the Alarm indicators on certain rectifiers are steady yellow, reinstall the rectifiers.
  4. If the alarm persists, replace the SMU.
Updated: 2019-11-27

Document ID: EDOC1000078784

Views: 24516

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