18-BG07D1-1B-EN
31
13. Check all wires for correct installation by referring
to the unit’s electrical wiring diagram in the
SERVICE FACTS.
14. Leak test all gas line connections with a soap and
water solution or the equivalent.
15. Re-install the CONTROL/HEAT access panels and
the flue hood.
16. Visually inspect the unit to ensure that the airflow
opening for combustion is not obstructed.
17. Follow “Unit Startup,” p. 25 to place the unit back
in service.
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If the airflow needs to be increased or decreased, see
the Airflow Table in the SERVICE FACTS. Information
on changing the speed of the blower motor is in the
Blower Performance Table. Blower speed changes are
made on the ECM Fan Control mounted in the control
box. The ECM Fan Control controls the variable speed
motor. There is a bank of 8 dip switches, (See Figure 8,
p. 31), located on the board. The dip switches work in
pairs to match the cooling/heat airflow (CFM/TON), Fan
off-delay options and electric heat airflow adjustment.
The switches appear as shown in the Figure below.
Figure 8. ECM Fan Control
CFM
SELECTION
LIGHT
DIP
SWITCHES
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There are two LEDs on the IGN board that provide
status and diagnostic information. Refer to Table 17, p.
31 for a description of the LED codes.
Table 17. IGN LED Diagnostic Indicators
Status LED
Liteport LED
Steady OFF
Check Power or Failed Board 2 Flashes
System Lockout: Failed to detect or sustain
flame
Slow Flash Rate
Normal, No Call for Heat
3 Flashes
Pressure switch problem detected
Fast Flash Rate Not used 4 Flashes
High Limit switch protection device open
Steady ON Normal, No Call for Heat
5 Flashes
Flame sensed and gas valve not energized or
flame sensed and no “W” signal.
6 Flashes
Flame Rollout Switch open
7 Flashes
Thermostat miswired; W! & W2
Fast Flash Rate: The LED will flash on for 1/4 second and off for 1/4 second.
Slow Flash Rate: The LED will flash on for 3/4 second, then off for 1/4 second.
The pause between groups of fast flashes is 3 seconds.
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