REMEDIES FOR MINOR PROBLEMS
12
This section examines some of most likely problems that can compromise correct operation of the UPS, attempting
to solve them and identifying the possible causes and remedies.
WARNING!
THE UPS INTERNALLY GENERATES HAZARDOUS ELECTRICAL VOLTAGES.
ALL MAINTENANCE MUST BE PERFORMED SOLELY AND EXCLUSIVELY BY AUTHORIZED
PERSONNEL.
If you have diculty in getting the UPS to work, the reason may be among those listed below. For any other prob-
lem, you are advised to get in touch with your dealer or service organisation directly.
For quick and eective action, when you call it is important to give precise details of the defect, the model number
and the manufacturing serial number that can be found on the conformance and inspection certicate or on the
data plate on the bottom of the UPS.
Troubleshooting for minor problems
Problem Possible cause Solution
The UPS works in battery mode even if
mains power is available.
Poor connection to the input mains.
Check the connection of the cable to
the UPS and to the mains outlet.
The mains voltage is out of range.
No solution because mode of opera-
tion is correct.
Input protection triggered
(blown fuse or automatic switch).
Replace the input fuse with another of
the same type or reset the automatic
switch.
Back-up time shorter than expected.
Batteries not fully charged.
Leave the batteries to charge for 8
hours consecutively.
Batteries not working properly
Have the batteries replaced by author-
ised personnel.
The UPS stalls/goes into overload
alarm.
Overload on the load line
Check that the load applied is not
greater than the maximum permitted
or reduce the load power requirement.
IF THE EQUIPMENT IS TO BE LEFT IDLE FOR A LONG PERIOD, WAIT FOR THE BATTERIES TO
CHARGE FULLY BEFORE SWITCHING OFF. WHILE THE UPS IS LEFT IDLE, MAKE SURE THAT THE
BATTERIES ARE RECHARGED FOR 24 HOURS AT LEAST ONCE EVERY 4 WEEKS.
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