Table 20:
Front communication LEDs
LED
Communication ok
Uplink
Steady green light
Communication
Flashing yellow light
7.1.3.2
Checking time synchronization
•
Check the time synchronization via LHMI in
Main menu/Monitoring/IED
status/Time synchronization
.
7.1.4
Running the display test
A short display test is always run, when auxiliary voltage is connected to the
protection relay. The display test can also be run manually.
•
Press simultaneously
and
.
All the LEDs are tested by turning them on simultaneously. The display shows a
set of patterns so that all the pixels are activated. After the test, the display returns
to normal state.
Clear any indications on the display before running the display test
manually.
7.2
Indication messages
7.2.1
Internal faults
Internal fault indications have the highest priority on the LHMI. None
of the other LHMI indications can override the internal fault
indication.
An indication about the fault is shown as a message on the LHMI. The text
Internal Fault
with an additional text message, a code, date and time, is shown
to indicate the fault type.
Different actions are taken depending on the severity of the fault. The protection relay
tries to eliminate the fault by restarting. After the fault is found to be permanent, the
protection relay stays in the internal fault mode. All other output contacts are released
and locked for the internal fault. The protection relay continues to perform internal
tests during the fault situation.
Section 7
1MRS758754 B
Troubleshooting
106
REC615 and RER615
Operation Manual
