Installation and Maintenance Manual

29GBNE-SVX001A-EN
No Cycling or appliance power
or thermostat call for heat since
appliance failure has occurred.
1. Check the system thermostat
to make sure it is calling for
heat. (Do not cycle the thermo-
stat on and off at this time.)
2. Remove the appliance
burner compartment door.
Do not interrupt power to the
control board by opening any
electrically interlocked panels.
3. Observe the LED indicator on
the control board (a greem
LED labeled “OK” indicates
system faults); check and
repair system as noted in the
chart to the right.
*NOTICE: Air flow proving switch
and power ventor hose barbs
must be free of any dust or
debris at all times. Periodically
check these openings and/or if
any problems occur.
Not Applicable
Not Applicable
1. Line voltage on terminals 120
and C on transformer.
2. Low voltage (24V) on terminals
24 and C on transformer.
3. 5 Amp fuse on circuit board.
1. Common side of transformer
grounded to chassis.
2. Loose spark ignitor.
1. Gas supply off or gas supply
pressure too low.
2. Flame sense rod contaminated
or loose wire.
3. Gas valve switch is off or wires
are not connected.
4. Broken or cracked porcelain on
flame probe or spark ignitor.
1. Obstructions or restrictions
in appliance air intake or flue
outlet are preventing proper
combustion airflow.
2. Moisture or debris in tubing that
connects pressure switch and
draft inducer.
3. Airflow switch jumpered or
miswired.
1. Open manual reset rollout switch.
2. Gas pressure too high, over fire
condition.
3. Incorrect airflow due to blockage
or motor not operating.
1. Flame probe miswired
or shortened.
1. Thermostat is interfering
with control board.
Control OK, no call for heat.
Control OK, call for heat present.
Internal control fault, or no power.
Control internal failure or bad
ground.
In lockout from failed ignitions
or flame losses.
Pressure Switch open with inducer
on or closed with inducer off.
Limit or rollout switch is open.
Flame sensed while gas valve is off.
On-board microprocessors disagree.
LED STATUS
INDICATES CHECK/REPAIR
Slow Flash
Fast Flash
Steady Off
Steady On
2 Flashes
3 Flashes
4 Flashes
5 Flashes
6 Flashes
Table 9A - Tubular Blower Troubleshooting with LED Indicator Assistance
WARNING
Line voltage power can cause
product damage, severe injury or
death. Only a trained experienced
service technician should perform
this trouble-shooting.