The compressor motor is in a sealed system so it does not
require lubrication.
5. If the indoor blower assembly is belt driven, periodical-
ly check the system for belt tension and condition.
Turn thermostat system for belt tension and condition.
Turn thermostat system switch off and disconnect
power to indoor unit. Depress the belt midway between
the two pulleys. The belt should deflect approximately
3
⁄4 of an inch at this position. Also check for cracks in
the belt. The belt should be replaced if wear is indicated.
If in doubt, call your servicing contractor. When the
check is completed, restore main power to indoor unit
and reset the thermostat system switch to the on posi-
tion.
6. If your outdoor unit is equipped with an external manu-
al high pressure switch reset button, have your servic-
ing contractor familiarize you with its location. Many
models have compressors equipped with internal pres-
sure relief valves using an automatic reset feature
eliminating the need for an external control. This high
pressure switch or the relief valve will open under
excessive high pressure to protect the compressor.
Some models with internal relief valves will require
power interruption prior to resetting itself. The high
refrigerant pressure may be due to a temporary condi-
tion, so if your unit is equipped with a reset button you
may reset it as required. However, If the problem per-
sists, refer to item 8, and/or refer the problem to your
servicing contractor.
7. If the condenser coil is allowed to become restricted by
dirt, lint, paper, grass clippings, leaves, etc., the sys-
tem efficiency will suffer and abnormally high refriger-
ant operating pressures will result. To correct this con-
dition, be sure to first cut off power to the unit, and
then clean such material from the condenser coil and
cabinet. Using a garden hose with a nozzle can be
effective in cleaning the condenser coil, but the water
should be sprayed from the inside to outside of the coil
in the opposite direction from the normal airflow when
the condensing unit is operating.
8. If you know or suspect that the compressor in the out-
door section is not working, you should place the ther-
mostat system switch on the thermostat subbase to the
off position. This will stop the operation of the outdoor
unit.
9. If you suspect that a problem has developed with your
system and before you advise your servicing contrac-
tor, we suggest you check the following service hints:
Problem — Remedy
No Cooling
1. Set thermostat correctly. Return system switch to the
off position, wait 5 minutes before returning system
switch to cool position.
2. Reset high pressure switch on outdoor unit.
3. Check fusing or circuit breakers serving outdoor and
indoor units.
4. Call servicing contractor.
Insufficient cooling —
Unit operates continuously
1. Check air filters.
2. Check for blocked return air system.
3. Check to see if supply registers have been closed.
4. Check for open doors and windows.
5. Call your servicing contractor.
Please do not attempt any servicing operation with which
you are not familiar or experienced unless you are advised
by your servicing contractor of the proper procedures.
Thank you. Now relax and enjoy the cool air.
Protecting Equipment From
The Environment
The metal parts of this unit may be subject to rust or dete-
rioration in adverse environmental conditions. This oxida-
tion could shorten the equipment’s useful life. Salt spray,
fog or mist in seacoast areas, sulphur or chlorine from
lawn watering systems, and various chemical contami-
nants from industries such as paper mills and petroleum
refineries are especially corrosive.
WARNING: DISCONNECT ALL POWER TO UNIT BEFORE
STARTING MAINTENANCE!
1. Avoid having lawn sprinkler heads spray directly on the
unit cabinet.
2. Frequent washing of the cabinet, fan blade and coil
with fresh water will remove most of the salt or other
contaminants that build up on the unit.
3. Regular cleaning and waxing of the cabinet with a
good automobile polish will provide some protection.
4. A good liquid cleaner may be used several times a
year to remove matter that will not wash off with water.
Several different types of protective coatings are offered in
some areas. These coatings may provide some benefit,
but the effectiveness of such coating materials cannot be
verified by the equipment manufacturer.
The best protection is frequent cleaning, maintenance and
minimal exposure to contaminants.
CM 1090
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