94MS36 Rev. F2 S/W Ver 2.06
11-1
11. Air Conditioning System
Compressor
The air conditioning compressor requires no routine maintenance. It is
hermetically sealed, properly lubricated at the factory, and should provide
years of satisfactory operating service.
Should the refrigerant charge be lost, recharging ports (access fittings)
on the suction and discharge sides of the compressor are provided for
recharging and/or checking suction and discharge pressures.
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The access fitting covers should never be loosened, or
removed, except by trained refrigeration service personnel.
Inlet Filter
Proper maintenance of the inlet filter will assure proper operation of the
air conditioner. Delaying or ignoring filter maintenance will reduce the
maximum ambient temperature under which the unit will operate.
The compressor operating temperature will increase above normal if the
inlet filter is dirty or clogged or if the condenser coil is plugged. This is
caused by a reduction in cooling air flow across the surface of the
compressor and condenser coil. The air conditioner compressor will shut
down if the thermal overload cutout switch located on the compressor
housing is actuated.
When the compressor temperature has dropped to within the thermal
overload switch‘s cutin setting, the compressor will restart automatically.
However, shut downs will reoccur until the inlet filter has been cleaned
or replaced.
It is recommended that power to the air conditioner be manually
interrupted when abnormally high compressor operating temperatures
cause automatic shutdown of the unit.
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Continued operation under the above conditions will
damage the compressor and shorten its life. The air conditioner
features an easily removable inlet filter to facilitate necessary
cleaning. There should be no reason to neglect this necessary
maintenance.