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English
User’s Manual IUPS-401-Series
4. Display
“Mains mode“ LED:
The green LED is on when mains voltage is supplied.
The green LED flashes during battery charge.
“Back-up mode“ LED:
Combined with an acoustic alarm sound every 3 seconds the red LED
flashes as soon as the IUPS has taken over power supply in case of mains
power failure.
“Battery low“ LED:
The red LED flashes (quickly) when the battery is low.
“Failure“ LED:
This failure indication is engaged in case of
overload, overtemperature or an internal
failure.
Overload:
In case of an overload the red LED turns permanently red combined with a permanent
alarm sound, and the UPS switches the load off. As soon as the overload is gone, the
output voltage is switched on again. The permanent sound stops after approximately.
30 seconds.
Overtemperature / Internal failure:
The red LED flashes combined with a warning sound continuously every 2 seconds.
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