UPS: MKD 700
– 3000 VA RT (XL)
Maintenance and Service
12.
Maintenance and Service
You can expect a long service life and interference-free operation from this
product. The service life and reliability of the UPS is greatly dependent on the
conditions of its environment. The ambient temperature and humidity in the
vicinity of the device must remain within the specified range. In addition, the
area around the UPS should preferably be kept clean and free of dust.
At an ideal ambient temperature of approximately 20-15°C, the service life of an
accumulator is typically about 4 years. An increased ambient temperature
(higher than 25°C) will significantly reduce the battery life which consequently
cancels the warranty on the batteries. Through the use of special accumulators,
the service life can be significantly increased.
It should be regularly checked (6-12 months) if the remaining autonomy time
(support time) is sufficient for the intended purposes. Should this no longer be
the case, the accumulators will have to be replaced.
12.1
Measuring the support time (autonomous time)
Before beginning with this procedure, it is obligatory that all open data files must
be secured. Also, inform all involved employees of your intentions. The battery
bank for the UPS should be completely charged in any event!
There are essentially two methods to measure the support time.
Method a) is suitable for measuring the actual back-up duration whereby the
loads are required to be currentless at the end of the autonomous time.
Method b) allows for the determination of the remaining capacity after a defined
support period. Here the loads are usually not currentless. In order to use one of
the mentioned methods, force the UPS in the autonomous mode by switching
off the mains power supply for the UPS (disconnect the plug). Switch the mains
power supply on again after the measuring procedure (connect the plug) and/or
switch the UPS on as usual.
Please remember that after measuring the autonomous period, the accumulator
may be discharged. This means that the UPS device must remain in standard
mode for several hours (min. 6 h) to recharge the battery bank accordingly,
before this is again approximately 80 % operational (capable of supporting).