10
REGULAR DEALER MAINTENANCE
In addition to the type of routine maintenance you might be
willing to perform, your unit should be inspected regularly by a
properly trained service technician. An inspection (preferably
each year, but at least every other year) should include the
following:
1. Inspection of all flue product passages — including the
burners, combustion baffles, heat exchanger, flue collec-
tor box, and vent pipe.
2. Inspection of all combustion-air and ventilation-air pas-
sages and openings.
3. Close inspection of all gas pipes leading to and inside
your unit.
4. Inspection, and if required, cleaning of the condenser and
evaporator coils.
5. Inspection, and if required, cleaning of the evaporator
drain pan.
6. Inspection, cleaning, and lubrication of blower wheel
housing and motor.
7. Inspection of all supply-air and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems
found should be resolved at this time.
8. Inspection of the unit base to ensure that no cracks, gaps,
etc., exist which may cause a hazardous condition.
9. Inspection of the unit casing for signs of deterioration.
10. Inspection of all electrical wiring and components to
assure proper connection.
11. Inspection for leaks in the refrigerant circuit. Pressure-
check to determine appropriate refrigerant charge
12. Operational check of the unit to determine working con-
ditions. Repair or adjustment should be made at this time.
13. Your servicing dealer may offer an economical service
contract that covers seasonal inspections. Ask for further
details.
Complete Service Instructions can be found in the unit
Installation, Start-Up and Service Instructions.
BEFORE YOU CALL FOR SERVICE CHECK
FOR SEVERAL EASILY SOLVED PROBLEMS
If insufficient heating or cooling is suspected:
(
) Check for sufficient airflow. Check the air filter for dirt.
Check for blocked return-air or supply-air grilles. Be sure they
are open and unobstructed. If these checks do not reveal the
cause, call your servicing dealer.
If your unit is not operating at all, check the following list
for easy solutions:
(
) If using a thermostat, check to be sure that your thermo-
stat temperature selector is set above the indoor temperature
during the heating season, or below the indoor temperature
during the cooling season. Be sure the SYSTEM switch in the
proper HEAT or COOL position and not in the OFF position.
(
) If using
Comfort
Link™ control, check Scrolling Mar-
quee to be sure unit is not in SERVICE TEST mode. Check set
points are properly set.
(
) Is the electrical supply switch on? Are any fuses blown,
or has the circuit breaker tripped?
(
) During the heating season, check the manual gas shutoff
valve. Is this lever parallel with the pipe, indicating that the
valve is open? Or is the lever at the right angle, indicating that
the valve is closed? If closed, has the gas been shut off for
safety reasons? Otherwise, you may open the valve and follow
the start-up procedures listed in this manual.
NOTE: Before proceeding with the next check, turn off the
electrical power supply to the unit.
(
) During the heating season, check the control dial on the
gas valve. Is it in the ON position? If it is not, be sure it has not
been turned off for the purpose of safety. If nothing else is
incorrect, follow the start-up procedures in this manual.
(
) If your unit still fails to operate, call your servicing dealer
for troubleshooting and repairs. Specify the model and serial
numbers of your unit. (Record them in this manual in the space
provided.) If the dealer knows exactly which unit you have, he
may be able to offer suggestions over the phone, or save valu-
able time through knowledgeable preparation for the service
call.
IN CASE OF TROUBLE
If, after performing the above, unit performance is unsatis-
factory, shut off the unit and call your dealer.
Dealer’s Name _____________________________________
Telephone No. ______________________________________
Unit Model ________________________________________
Unit Serial Number _________________________________
Summary of Contents for 48PG03
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