Fault Diagnosis / Fault Rectification; Error Messages - AEG Protect C.R Operating Instructions Manual

6.2

Fault Diagnosis / Fault Rectification

The PROTECT C.R generates detailed error messages.
Support personal can localise and interpret faults quickly and
precisely.
6.2.1

Error Messages

Problem
UPS does not start. No
indication, no warning tone
even though system is
connected to mains power
supply.
LED AC INPUT flashes and
audible alarm sounding
every 3 minutes.
LED AC INPUT flashes and
LED "Bat." lights up.
LED AC INPUT and LED
BYPASS light up even
though the power supply is
available. No supply of
connected loads.
LED UPS ON and LED
BATTERY lights up, and
audible alarm sounding
every 4 seconds.
LED ALARM lights, warning
tone once a second.
Cause
Mains and battery voltage
not in the tolerance range,
possible battery deep
discharge.
Phase and neutral
conductor at input of UPS
system are reversed.
Input power and/or
frequency are out of
tolerance.
Inverter not switched on.
Mains power supply has
failed. Automatic switch to
battery mode.
Overload of the UPS
system.
40
Solution
Check building wiring
socket outlet and input
cable.
Rotate mains power
socket by 180° or
connect UPS system.
Check input power
source (Voltage,
frequency) and inform
house electrician if
necessary.
Press On-Switch "ON"
for about 2 seconds.
Try to replace mains
supply (possibly
triggered fuse in sub
distribution). When
audible alarm sounding
every second, battery
is almost empty. At this
point it is time to
proceed with an system
shutdown of all you IT
equipment.
Reduce utilizations of
UPS by removing loads
of UPS output.