Page 13
V − MAINTENANCE
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon-
nect switch(es). Unit may have multiple
power supplies.
Maintenance and service must be performed by a qualified
installer or service agency. At the beginning of each cooling
season, the system should be checked as follows:
1.Make sure power is off before cleaning. Clean and inspect
outdoor coil. The coil may be flushed with a water hose.
The outdoor coil is protected by an inner mesh screen
and a wire cage (see figure 13). If debris has collected
between the mesh screen and the coil and cannot be
dislodged by spraying unpressurized water from inside
coil surface to the outside, the mesh may be removed by
first removing the top of the unit which will allow for re-
moval 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 remove 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 fin brush (22 fins/in). Line up the
push pin a couple fins to the right or left of the original
hole and re−insert the pin.
2.Outdoor fan motor is prelubricated and sealed. No further
lubrication is needed.
3.Visually inspect connecting lines and coils for evidence of
oil leaks.
4.Check wiring for loose connections.
5.Check for correct voltage at unit (unit operating).
6.Check amp−draw outdoor fan motor.
Unit nameplate _________ Actual ____________ .
NOTE − If owner reports insufficient cooling, the unit should
be gauged and refrigerant charge checked. See refrigerant
charging section.
9 pins used on
−048 and −060; 6
pins all others
PUSH PIN
MESH SCREEN
Figure 13
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
Indoor Coil
1.Clean coil, if necessary.
2.Check connecting lines and coils for signs of oil leaks.
3.Check the condensate pan line and clean if necessary.
Indoor Unit
1.Clean or change filters.
2.Adjust blower speed for cooling. The pressure drop over the
coil should be measured to determine the correct blower
CFM. Refer to the unit information service manual for
pressure drop tables and procedure.
3.Check all wiring for loose connections
4.Check for correct voltage at unit (blower operating).
5.Check amp−draw on blower motor.
Unit nameplate_________ Actual ____________.
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