USV ME400/500/600/650/800
Instruction Manual
ME series
Page 24 of 32
Problem:
Possible cause:
Remedy:
The UPS cannot be
started and no alarm
signal is given.
Mains power is not
available to the UPS or
is switched off.
Ensure that all connections
have been established and
verify this by means of
appropriate voltage
measurements. Check the
line-side fuse for the UPS.
The batteries are deep-
discharged or defective.
Remove batteries from the
UPS and charge externally
or replace.
The UPS is in overload
mode, the overload
indicator is illuminated,
and an audible warning
notification sounds
(sequence (C)).
The consumer load(s)
are overloading the
UPS.
Remove the consumer or
some of the consumers
from the UPS.
The bridging time is less
than the rated value.
The batteries are not
fully charged, or
individual batteries are
defective.
Charge the batteries for
more than 8 hours and
repeat the test. If the
problem persists, the
batteries must be replaced.
The UPS appears to be
OK, but the consumer
load is not operating.
The connection between
the UPS and the
consumer load is
defective.
Check the connection and
confirm it by measuring the
voltage.
If the fault profile you are experiencing with your UPS is not described in the
above table, inform our service department making sure you have the following
information to hand:
1. Model number, serial number
2. Date on which the problem occurred
3. Detailed description of the problem
