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X. Maintenance
Kooltronic Air-Cooled Air Conditioners require routine cleaning of the condenser coil (as necessary) and the air
filters to assure unimpeded airflow through the condenser heat exchanger. It is not possible to recommend specific
condenser coil or filter cleaning intervals, since the level and the nature of airborne particulate matter differs widely
with each installation. It is generally sufficient to clean the condenser coil and/or the aluminum mesh filter when the
outer surfaces appear covered with a thin layer of dust, lint or other foreign matter. The condenser coil can be
washed or blown out with air, depending on the foreign matter involved (see below -
Filter and condenser coil
service
). The aluminum mesh filter can be washed with warm water. Appropriate disposable replacement filters
are available from Kooltronic.
If routine condenser coil or filter service is neglected or delayed, the air conditioner will not perform at its design
capacity. The first indication of an excessively clogged condenser coil or air filter is usually a gradual increase of
temperature within the equipment cabinet. If operation is continued under these conditions, the compressor will be
shut off by the thermal overload device. The compressor will restart when its external temperature drops below the
protector threshold setting and the compressor will continue to cycle on and off. Continued operation under these
conditions will cause damage, shorten compressor life and void the warranty.
A. Filter and condenser coil service
The filter is installed in the unit. In order to clean the filter, remove the rear panel. After removal, the filter
should be flushed under warm running water with clean side up. If the accumulated dirt is oily, washing in
a detergent bath is recommended, followed by a warm water wash as above.
After filter removal, the exposed condenser coil must be cleaned by pressurized air or pressurized cleaning
solution. Dirty liquid will be removed through the condenser coil drain pan.
B. Blowers
The design life of the blowers used in all Kooltronic Air Conditioners is substantially in excess of 20,000
hours. All Kooltronic condenser and evaporator blowers are equipped with automatic-reset thermal
overload protectors.
CAUTION
If field replacement of a blower motor is necessary, most blower assemblies, including the mounting plate, are
removable. Each of the blower mounting plates is held to the air conditioner cabinet structure by screws and
nuts. For installation of the replacement blower, electrical connections may be broken at the terminal block,
or power leads may be cut and appropriately spliced together.
C. Compressor
All Kooltronic compressors are approved by UL and CSA, and require no maintenance. They are
hermetically sealed and charged at the factory, and equipped with automatic-reset thermal overload
protectors.
If the compressor fails, it is strongly recommended that the air conditioner be returned to Kooltronic for
service.
D. Refrigerant Loss
Kooltronic Air Conditioners are subjected to a series of tests to detect refrigerant leaks, during and after
manufacture. It is possible that shipping or other damage, or microscopic leaks over a long period, may result
in the need for replenishment of refrigerant charge.
When it has been verified by a Certified EPA Technician
that a refrigerant shortage does exist, the leak must be repaired. Then the unit may be evacuated and
recharged in the field by a Certified EPA Technician only.
Before opening the air conditioner, disconnect all power.
