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Page 10

505128M 03/06

System Operation

The outdoor unit and indoor blower cycle on demand from
the room thermostat. When the thermostat blower switch
is in the

position, the indoor blower operates continu-

ously.

Maintenance

NOTE − White residue may surface on guards and grilles
of outdoor units. This is caused by mild acids present in
minute quantities in the plasticizer applied to make the
coating flexible. The residue is comprised of non−toxic,
common fatty acids found in natural animal and vegetable
oils, and can be removed by wiping the parts with a cloth.
Once outside, and over time, the rain will wash off any re-
maining residue.

Maintenance and service must be performed by a qualified
installer or service agency. At the beginning of each cool-
ing season, the system should be checked as follows:

WARNING

Electric shock hazard. Can cause inju-
ry or death. Before attempting to per-
form any service or maintenance, turn
the electrical power to unit OFF at dis-
connect switch(es). Unit may have
multiple power supplies.

1. Clean and inspect the outdoor coil. The coil may be

flushed with a water hose. Make sure power is off be-
fore cleaning.

The outdoor coil is protected by an inner mesh screen
and a wire cage (see figure 9).

6 pins

PUSH PIN

MESH SCREEN

Figure 9

ÂÂÂÂÂÂÂÂÂÂÂÂÂ

If debris has collected between the mesh screen and
the coil and cannot be dislodged by spraying unpres-
surized water from the inside coil surface to the out-
side, the mesh may be removed by first removing the
top of the unit which will allow for removal of the wire
cage.

Then, using pliers to grip the head of the push pins, pull
straight out to extract the push pins along one side of
the coil. If necessary, remove the push pins along the
back of the unit; it is usually unnecessary to fully re-
move the inner mesh screen.

Drape the mesh screen back and wash the coil. When
all the debris has been removed from the coil, reinstall
the mesh screen by positioning it in its original position
and reinserting the push pin. No tool is required to
push the pin back into the same slot in the fins.

If the push pin is loose and tends not to stay in place,
brush the fins with a 22 fpi fin brush (except model
−024, 18 fpi). Line up the push pin a couple fins to the
right or left of the original hole and re−insert the pin.

2. Condenser fan motor is prelubricated and sealed. No

further lubrication is needed.

3. Visually inspect connecting lines and coils for evi-

dence of oil leaks.

4. Check wiring for loose connections.

5. Check for correct voltage at unit (unit operating).

6. Check amp−draw condenser fan motor.

Unit nameplate _________ Actual ____________ .

NOTE − If the owner reports insufficient cooling, the
unit should be gauged and the refrigerant charge
should be checked. Refer to the charging section in
this instruction.

Indoor Coil

1. Clean coil, if necessary.

2. Check connecting lines and coils for evidence of oil

leaks.

3. Check the condensate pan line and clean it if neces-

sary.

Indoor Unit

1. Clean or change filters.

2. Adjust blower speed for cooling. Measure the pressure

drop over the coil to determine the correct blower CFM.
Refer to the unit information service manual for pressure
drop tables and procedure.

Belt Drive Blowers −

Check belt for wear and proper