IX. INTEGRATED GAS CONTROLLER (IGC)
The IGC board incorporates an LED (light-emitting diode) that
emits a flashing light to indicate an alarm code. If the fur-
nace section will not operate and the LED is flashing a code
(2 to 8 flashes in succession), contact your dealer and request
service. See Fig. 1.
X. REFRIGERANT CIRCUIT
The refrigerant circuit is difficult to check for leaks without
the proper equipment; therefore, if inadequate cooling is sus-
pected, contact your dealer for service.
XI. COMBUSTION AREA AND VENT SYSTEM
The combustion area and vent system should be visually in-
spected before each heating season. The normal accumula-
tion of dirt, soot, rust, and scale can result in loss of efficiency
and improper performance if allowed to build up.
CAUTION:
If your unit makes an especially loud noise
when the main burners are ignited, shut down the heat-
ing section and call your dealer.
See Fig. 1 and proceed as follows to inspect the combustion
area and power-venting system of your unit.
1. Turn off gas supply and electrical power to your unit.
2. Remove burner compartment access panel.
3. Using a flashlight, carefully inspect the burner areas for
dirt, soot, rust, or scale.
CAUTION:
If dirt, soot, rust, or scale accumulations
are found, call your dealer and do not operate your heat-
ing section.
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 with the access panel
removed, and watch the burner flames to see if they are
bright blue. If you observe a suspected malfunction, or
that the burner flames are not bright blue, call your dealer.
See Fig. 5.
NOTE: Some yellow flame may be present since the panel is
removed.
6. Replace burner compartment access panel.
XII. 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.
Fig. 5 — Proper Flame Appearance
—6—
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