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The fan shaft bearings, the supply fan motors, the
condenser fan motors and compressors are permanently
lubricated.
All ue product carrying areas of the furnace, its vent
system, and main burners should be examined by a
qualied service agency, and cleaned if necessary, before
the start of each heating season. This examination is
necessary for continued safe operation. Particular attention
should be given to deterioration from corrosion or other
sources. This examination is accomplished in the following
manner.
1. Disconnect power to the unit and remove furnace
section access panel.
2. Remove burner assembly:
a. Disconnect the wires from the gas valve after
noting which wires are connected to each
terminal.
b. Disconnect wires from the ame rod and ignition
electrode.
c. Disconnect the gas piping at the union.
d. The entire burner assembly can now be
removed from the unit.
3. Inspect and periodically clean the vent outlet (bird
screen) on the access panel.
Flames should be stable, soft and blue (dust may cause
orange tips but must not be yellow). The ames must
extend directly outward from the burner without curling,
oating or lifting o.
At least once a year, prior to or during the heating season,
make a visual check of the burner ames.
If a strong wind is blowing, it may alter the airow pattern
within the unit enough that an inspection of the burner
ames is not possible.
Refer to the unit Parts Catalog for a list of functional parts.
Parts are available from your distributor.
The following presents probable causes of questionable
unit operation. Refer to Diagnostic Indicator Chart for
an interpretation of the signal and to this section for an
explanation.
Remove the control box access panel and note the number
of diagnostic LED ashes.
If the integrated ignition control in this unit encounters an
internal fault, it will go into a “hard” lockout and turn o the
diagnostic LED. If diagnostic LED indicates an internal
fault, check power supply to unit for proper voltage, check
all fuses, circuit breakers and wiring. Disconnect electric
power for ve seconds. If LED remains o after restoring
power, replace control.
Abnormal Operation - Heating Codes
An external lockout occurs if the integrated ignition control
determines that a measurable combustion cannot be
established within three (3) consecutive ignition attempts.
If ame is not established within the seven (7) second trial
for ignition, the gas valve is deenergized, 15 second inter-
purge cycle is completed, and ignition is reattempted. The
control will repeat this routine three times if a measurable
combustion is not established. The control will then shut
o the induced draft blower and go into a lockout state.
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