7.1.3.1
Checking front communication link operation
•
To verify front communication, check that both LEDs above the RJ-45
communication port are lit.
Table 19:
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.
Section 7
1MAC456939-IB D
Troubleshooting
102
620 series ANSI
Operation Manual
