Section 2 1MDU07212-YN Rev. C
REF601/REJ601 overview
10 REF601 / REJ601
Application Manual
At normal condition (no internal fault), the green Ready LED glow and the self-
supervision output contact is closed.
When an internal fault is detected in the IED, the green LED ceases to glow and
the self-supervision contact closes. Also, all other outputs are released.
Figure 1: Behavior of contact assigned for Unit ready / IRF
Internal fault indications have the highest priority on the LHMI. None of other
LHMI indications can override the internal fault indication. An indication about the
fault is shown as a message on the LHMI.
The internal fault code indicates the type of internal IED fault
Table 2: Internal fault indications and fault codes
Internal fault code Type of fault
IRF 008 Internal supply voltage check
IRF 016 Power on “EEPROM“ check fault
IRF 032 Runtime “EEPROM“ check fault
IRF 064 Gain check fault
The user can try to eliminate the fault by restarting the IED. If the fault is found to
be permanent, the IED stays in internal fault mode.
5
6
F)
XK2:
5
6
BO4
(IRF)
XK2:
condition
condition
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