Table of Contents
Advertisement
7200 Series UPS User Manual
Single Module and 1+1 Parallel System
6.
Chapter 6 - Trouble shooting
6.1
Trouble shooting UPS Systems
The UPS contains complex electronic control circuits that require a firm understanding in order to
carry out comprehensive fault diagnosis and repair of the equipment. The following information aims
to provide a trained user with sufficient knowledge to understand the nature of a fault through the
correct interpretation of the accompanying alarms and indications, and to carry out any necessary first
aid repair action.
Some of the instructions in the charts at the end of this chapter involve checking internal fuses. This should be
undertaken ( after the equipment has been shut down ) only by a trained electrician who is familiar with the layout
and operation of the equipment and fully conversant with the areas of potential hazard.
6.1.1
Operating parameters and limitations
Most UPS problems do not emerge as a gradual performance degradation; generally the UPS either
works correctly or it will shut down - and transfer the load to the bypass supply if applicable. However,
it is important to maintain a regular record of the UPS meter indications, as suggested in the
maintenance instructions, in order that any change in the system or load characteristics are readily
identified.
In general, the output voltage should be within 2% of nominal. If the UPS has not operated on battery
power within the previous ten hours the battery charge current should be typically less than 6A.
If any indication differs significantly from the typical figures given above the cause should be
investigated.
Information concerning prevailing load conditions can prove useful when discussing problems with
the service agent - for example, details of any particular load being started or shed at the time that the
fault occurred.
6.1.2
General Trouble shooting Procedure
Trouble shooting should be carried out methodically using the following guidelines:-
Fault Identification
When first summoned to the scene of a UPS fault, your immediate action should be to observe and
record the displayed messages, mimic indications and the position of the UPS power isolator switches.
This should be completed before you touch any switch.
Corrective Action
When all the indications have been noted, you should refer to the following fault interpretation charts
and carry out the actions detailed against any led whose status is abnormal. If you are unsure as to how
to undertake the actions detailed - or if several led indications are abnormal and you are unable to
distinguish between the likely cause and affects - then seek immediate assistance from an approved
service agent.
document in response to "powersure ups"
WARNING
Chapter 6 - Trouble shooting
Trouble shooting UPS system
Page 6-1
Issue 6
(03/98)
Hide quick links:
Advertisement
Table of Contents
