Siemens UTMC OTU Handbook page 114

Symptom
(a) Unit not operating
(b) Outstation has no
Unit Battery Support.
(c) Invalid Date
reported
insulation tab still fitted
667/HB/31601/000
8.5 TABLE FOR POWER FAILURES
Possible Diagnosis
PSU failed Check the unit has mains power. If yes, replace the PSU. If no, then check the
cabinet's mains fusing and power supply.
Mains Supply failed Check the cabinet's mains supply to the unit and repair as necessary. If fault
persists due to no mains, request the electricity authority to restore mains
supply.
Battery Fuse failed Check the battery fuse and replace if blown.
Battery cable Remove the unit. Check, by removing the protective cover from the PSU and
connections failed battery area, that the Faston tags are connected correctly. Refit if necessary.
Unit Support Battery When the Mains power is switched off, or has failed. If the battery fuse is not
failed blown, and the battery cables connections are sound, then replace the Unit's
support battery (see section 8.2 on page 110).
RTC support battery Check that the RTC support battery insulation tab is not fitted. If fitted remove it
and check if the unit now has RTC support. If the fault persists, replace the
RTC Battery (see section 8.2 on page 110).
RTC support battery If the RTC support battery insulation tab is not fitted replace the battery (see
failed section 8.2 on page 110).
Page 114
Action to Check Diagnosis
Issue 5
UTMC OTU/MOVA Handbook