Section 18 Fault tracing and repair
About this chapter
This chapter describes how to carry out fault tracing and if necessary, a change of
circuit board.
18.1 Fault tracing
18.1.1 Information on the local HMI
If an internal fault has occurred, the local HMI displays information under Main
menu/Diagnostics/IED status/General
Under the Diagnostics menus, indications of a possible internal failure (serious
fault) or internal warning (minor problem) are listed.
Indications regarding the faulty unit are outlined in table
31.
Table 31: Self-supervision signals on the local HMI
HMI Signal Name:
Status Description
INT Fail OFF / ON This signal will be active if one or more
of the following internal signals are
active; INT--NUMFAIL, INT--
LMDERROR, INT--WATCHDOG, INT--
APPERROR, INT--RTEERROR, INT--
FTFERROR, or any of the HW
dependent signals
INT Warning OFF / ON This signal will be active if one or more
of the following internal signals are
active; INT--RTCERROR, INT--
IEC61850ERROR, INT--
TIMESYNCHERROR
NUM Fail OFF / ON This signal will be active if one or more
of the following internal signals are
active; INT--WATCHDOG, INT--
APPERROR, INT--RTEERROR, INT--
FTFERROR
NUM Warning OFF / ON This signal will be active if one or more
of the following internal signals are
active; INT--RTCERROR, INT--
IEC61850ERROR
ADMnn READY / FAIL Analog input module n failed. Signal
activation will reset the IED
BIMnn READY / FAIL BIM error. Binary input module Error
status. Signal activation will reset the IED
Table continues on next page
1MRK 502 029-UEN A Section 18
Fault tracing and repair
239
Installation and commissioning manual
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