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air conditioner maintenance
Warning:
to prevent electrical shock, personal injury, or
death, disconnect all electrical power to the unit
before performing any maintenance or service.
the unit may have more than one electrical supply.
Proper maintenance is important to achieve optimum
performance from the air conditioner. The ability to properly
perform maintenance on this equipment requires certain
mechanical skills and tools. If you do not possess these
skills, contact your dealer for maintenance. Consult your
local dealer about the availability of maintenance contracts.
Routine maintenance should include the following:
• Inspect and clean or replace air filters at the beginning
of each heating and cooling season, or more frequently
if required.
• Inspect the condensate drain and outdoor coil at the
beginning of each cooling season. Remove any debris.
Clean the outdoor coil and louvers as necessary using a
mild detergent and water. Rinse thoroughly with water.
• Inspect the electrical connections for tightness at the
beginning of each heating and cooling season. Service
as necessary.
caUtion:
the unit should never be operated without a
filter in the return air system. replace disposable
filters with the same type and size.
• Do not attempt to add additional oil to motors unequipped
with oil tubes. The compressor is hermetically sealed
at the factory and does not require lubrication.
10
component FUnctionS
High pressure Switch (HpS) - Factory-installed and
located in the liquid line internal to the outdoor unit. The
switch is designed to protect the system when very high
pressures occur during abnormal conditions. Under normal
conditions, the switch is closed. If the liquid pressure rises
above 3102 kPa (450 psig), then the switch will open and
de-energize the outdoor unit. The switch will close again
once the liquid pressure decreases to 2413 kPa (350
psig). Please note that the switch interrupts the thermostat
inputs to the unit. Thus, when the switch opens and then
closes, there will be a 5 minute short cycling delay before
the outdoor unit will energize.
low pressure Switch (lpS) - Factory-installed and
located in the suction line internal to the outdoor unit. The
switch is designed to protect the compressor from a loss
of charge. Under normal conditions, the switch is closed.
If the suction pressure falls below 34.4 kPa (5 psig), then
the switch will open and de-energize the outdoor unit.
The switch will close again once the suction pressure
increases above 138 kPa (20 psig). Please note that the
switch interrupts the thermostat inputs to the unit. Thus,
when the switch opens and then closes, there will be a
5 minute short cycling delay before the outdoor unit will
energize.
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