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MD-1000I / MD-2000I / MD-3000I Maintenance and Service
MD Series 82
10.
Maintenance and Service
With just a little maintenance, you will have the uninterrupted use of your UPS
system for a long time.
Please note that the dependability of the UPS is very much affected by its envi-
ronment. Temperature and relative humidity must be kept at reasonable levels.
In addition, the area around the UPS should be kept as clean and dust-free as
possible.
At the optimum ambient temperature of 22° C, the typical battery life span is
approx. 4 years. Special-purpose, high-performance batteries will significantly
increase longevity, reaching around 8-10 years.
Regularly, (every 6-12 months), you should check to make sure the system
back-up capacity suffices for the intended purpose. If this is not the case, it is
necessary to replace the batteries.
10.1 Determining the Back-up Capacity
Before you begin this procedure, make sure all open documents and data
are backed up/saved. Also, be sure to inform all personnel who may be
affected.
There are two methods of determining the back-up capacity.
Method a)
is suitable for measuring the actual duration of time until the connected
equipment loses power.
Method b)
Permits determination of the remaining power capacity after a run using a
specified back-up time. Connected equipment usually does not lose
power in this instance.
To use one of these methods, it is necessary for you to simulate a situa-
tion that forces the UPS into battery back-up operation (e.g. turning off
building circuit breaker). Do not disconnect the power cable, as this will
break the earthing (neutral) connection. Once you have completed the
test, switch the circuit breaker back on and start the UPS as usual with
the ON button.