6. LED green light indicates that the mains breaker is closed. LED is flashing yellow if the "MB spring loaded" signal from the
breaker is missing or the MB load time has not expired.
7. LED green light indicates that the generator breaker is closed. LED yellow light indicates that the generator breaker has received
a command to close on a black bus, but the breaker is not yet closed due to interlocking of the GB. LED is flashing yellow if the
"enable GB black close" or the "GB spring loaded" signal is missing or the GB load time has not expired.
8. LED green light indicates that the voltage/frequency is present and OK.
9. LED indicates that the generator is running.
10. LED flashing indicates that unacknowledged alarms are present. LED fixed light indicates that ALL alarms are acknowledged,
but some are still present.
11. German AGC only: TEST LED.
2.4.1 LED colour schemes
There are two colour schemes for the display LEDs. If LED colour scheme 2 is required, use parameter 6082 (DU-2 only) to select it.
Breaker or bus status
Colour scheme 1 (default) Colour scheme 2
Breaker closed Green Red
Breaker open White/no color Green
Mains fail 0-30% Red Green
Mains above 30% but not inside “Hz/V OK” window. Red Red
Mains inside “Hz/V OK” window Green Red
Busbar fail 0-30% No color Green
Busbar above 30% but not side “Hz/V OK” window Red Red
Busbar inside “Hz/V OK” window Green Red
DG fail 0-30% No color Green
DG above 30% but not inside “Hz/V OK” window Red Red
DG inside “Hz/V OK” window Green Red
OPERATOR'S MANUAL 4189340690E EN Page 12 of 24
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