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6. Observe unit heating operation. Watch the burner flame
to see if it is bright blue. If you observe a suspected mal-
function or if the flame is not bright blue, call your dealer.
7. Replace gas section access panels.
Unit Panels — After performing any maintenance or
service on the unit, be sure all panels are securely fastened in
place to prevent rain from entering unit cabinet and to prevent
disruption of the correct unit airflow pattern.
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, heat exchanger, and flue collector box.
2. Inspection of all combustion and ventilation-air passages
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 condensate
drain pan.
6. Inspection and cleaning of blower wheel housing and
motor.
7. Inspection of all supply and return-air ducts for leaks, ob-
structions, and insulation integrity. Any problems found
should be resolved at the time of inspection.
8. Inspection of the unit base for cracks, gaps, etc., 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
ensure proper connection.
11. Inspection for leaks in the refrigerant circuit. Pressure-
check to determine appropriate refrigerant charge.
12. Inspection of fan wheels and housings, belt tension, and
fan motor shaft bearings.
13. Operational check of the unit to determine working
conditions. Repair or adjustment should be made at the
time of inspection.
Your servicing dealer may offer an economical service con-
tract that covers seasonal inspections. Ask for further details.
Complete service instructions can be found in the unit
Controls, Start-Up, Operation, Service and Troubleshooting
literature.
BEFORE YOU CALL FOR SERVICE,
CHECK FOR PROBLEMS
THAT CAN BE EASILY SOLVED
If insufficient heating or cooling is suspected:
( ) Check for sufficient airflow. Check the air filter for dirt.
Check for blocked return 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 set point is above the indoor temperature dur-
ing the heating season, or below the indoor temperature during
the cooling season. Be sure the thermostat mode is in the
proper AUTO, HEAT, or COOL mode and not in the OFF
mode.
( ) Check scrolling marquee to be sure unit is not in Service
Test mode and that unit has not been disabled. 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 external manual
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. Remove the gas section
access panels.
( ) During the heating season, check the switch 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 no safety hazards
are present, 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
valuable time through knowledgeable preparation for the
service call.
IN CASE OF TROUBLE
If, after performing the above checks, unit performance is
unsatisfactory, shut off the unit and call your dealer.
Dealer’s Name _____________________________________
Telephone No. _____________________________________
Unit Model _______________________________________
Unit Serial Number _________________________________
WARNING
Components in heat section may be hot after unit has been
started. When observing flame, be careful not to get close
to or touch heating components. Serious personal injury
may result.