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TP48200A-DT19D1 Telecom Power User Manual

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DC Over Volt

DC Over Volt

Possible Causes

  • The DC overvoltage alarm threshold is incorrectly set on the SMU.
  • The power system voltage has been manually set to a very high value.
  • Rectifiers are faulty.


  1. Check whether the DC overvoltage alarm threshold (58 V DC by default) is correctly set. If not, set the threshold to the correct value.
  2. Check whether the system voltage has been manually set to a very high value. If so, check with other maintenance personnel whether the voltage can be changed to a normal value.
  3. Remove the rectifiers one by one and check whether the alarm is cleared. If the alarm still exists, reinstall the rectifier. If the alarm is cleared, replace the rectifier.
Updated: 2019-11-27

Document ID: EDOC1000078784

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