ABB REL 551-C1 2.3 Series Installation And Commissioning Manual page 48

Line differential protection terminal
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42
Checking the self supervision signals
Indicated result
Reason
ADC-module = OK
No problem detected.
ADC-module = Fail
The A/D conversion
module has failed.
Slot04BIM1 = Fail
I/O module communi-
cation has failed.
(Example data, se fol-
lowing section for
details)
RealTimeClock = OK
No problem detected.
RealTimeClock =
The real time clock has
Warning
been reset.
TimeSync = OK
No problem detected.
TimeSync = Warning
No time synchroniza-
tion.
Energising the terminal
Action
None.
Contact your ABB representative for ser-
vice.
Check that the I/O module has been config-
ured and connected to the IOP1- block.
If the problem persists, contact your ABB
representative for service.
None.
Set the clock.
None.
Check the synchronization source for prob-
lems.
If the problem persists, contact your ABB
representative for service.
Chapter 7

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