Carrier 48TM016 - Manual (Page 6)

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3. Using a flashlight, carefully inspect the burner areas for
dirt, soot, rust, or scale.
4. When you have completed your inspection, follow the
start-up procedures in this manual to restore your unit to
operation.
5. Observe unit heating operation, and watch the burner
flame with the access panel removed, to see if it is bright
blue. If you observe a suspected malfunction, or that the
burner flames are not bright blue, call your dealer. See
Fig. 5. Some yellow flame may be present due to the pan-
el being removed.
6. Replace burner compartment access panel.
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, combustion baffles, heat exchanger, flue collec-
tor box, and vent pipe.
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 evaporator
drain pan.
6. Inspection, cleaning, and lubrication of blower wheel
housing and motor.
7. Inspection of all supply- 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 literature.
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- 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:
( ) Check to be sure that your thermostat 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 is in the proper HEAT or COOL
position and not in the OFF position.
( ) Is the electrical supply switch ON? Are any fuses blown,
or has the circuit breaker tripped?
( ) During the heating season, check the manual shutoff valve.
Is this lever parallel with the pipe, indicating that the valve is
open? Or is the lever at a right angle, indicating that the valve
is closed? If closed, has the gas been shut off for safety rea-
sons? 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 control access
door.
( ) 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 seems
to be amiss, 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, unit performance is unsatis-
factory, shut off the unit and call your dealer.
Dealer’s Name _____________________________________
Telephone No. _____________________________________
Unit Model ________________________________________
Unit Serial Number _________________________________
If dirt, soot, rust, or scale accumulations are found, call
your dealer and do not operate your heating section.
Fig. 5 — Proper Flame Appearance