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Preventative maintenance
Introduction
The units are often placed in tough environments distinguished by high temperatures,
humidity and dust. Preventative maintenance is essential to ensure that the unit always
has the capacity to perform as expected.
Warning!
Remember to disconnect all power supplies to the unit before starting work. The power
must not be reconnected until the work has been completed and the unit is ready for
testing.
Tools needed
You will need the following tools for the maintenance work:
Use a …
to…
Vacuum cleaner and/or air compressor
Clean the unit thoroughly
Soft brush or paintbrush
Remove the dirt that could not be
removed by vacuuming or blasting with
compressed air.
Screwdriver and torx
Tighten loose screws
Intervals
In the same way as a car, the unit must be checked at regular intervals. Failure to
perform preventative maintenance regularly can result in stoppages of both the unit and
the electronic systems it was intended to keep cool or warm.
The interval between maintenance checks must not exceed 6 months. These checks
should be planned for immediately before and after the hot season. This will make sure
that the unit will be able to meet requirements for cooling and heating.
Warranty
conditions
The factory warranty is only valid if preventative maintenance checks at intervals of no
more than 6 months can be documented. This documentation may take the form of an
on-site log or a print-out from the PC test program.
Recommended
procedure
The recommended procedure for preventative maintenance checks is:
Step
Action
1
Make sure that the unit is completely free from current of all kinds
2
Clean the unit thoroughly:
•
Air ducts
•
Fan blades
Continued overleaf
