AEG Protect B. 750 PRO Operating Instructions Manual page 45

Symptom
Pictograms and
are flashing. Warning
tone is emitted once a
second.
Pictograms and
are flashing. Warning
tone is emitted once a
second.
Liquid crystal display -
shows fault ind. "14".
Warning tone emitted
continuously.
Liquid crystal display -
shows fault ind. "27".
Warning tone emitted
continuously.
Liquid crystal display -
shows fault ind. "28".
Warning tone emitted
continuously.
Liquid crystal display -
shows fault ind. "41".
Pictograms and
are flashing. Warning
tone is emitted once a
second.
Pictograms
and are
flashing. Warning tone is
emitted twice a second.
Possible cause
Emergency switch-off
active; the plug part or -
its inserted wire bridge
may have been
disconnected from the
back of the UPS.
The internal or
external battery
system was not
connected correctly.
UPS switched off
automatically due to a
short-circuit which
has occurred.
Battery voltage too
high or battery
charging unit is faulty
Battery voltage too low
or battery charging unit
is faulty.
UPS switched off
automatically due to
internally detected
over-temperature.
UPS is overloaded.
45
Suggested
solution
Reset the
connected switch
or insert the plug
part. Briefly
disconnect the
UPS from the
mains.
Check the
contact
connection of the
battery as per
Section 6.1/6.2,
starting on Page
28.
Check your
connected -
electrical loads
and your UPS
outlet cabling.
Contact your
specialist dealer
or our hotline.
Contact your
specialist dealer
or our hotline.
Allow the
unit to cool down
and then check
fan operation. If
excessive dust is
present, clean
the fan.
Reduce the load
of the UPS by
discon- necting
some of your
electrical loads.
EN