4
Flame not established
1. If the flame is not established or proven during the initial
will enter a retry mode. There will be four more successive
attempts allowed each having a 15 second inducer purge
between attempts.
is still not established and proven there will be a 1 hour lock
out before the system will reset automatically. To reset the
on the 24 VAC power to the board. If the problem is not a
false flame, the board can also be reset by cycling the heat
detected when the gas valve is de-energized and there is no
flame), cycling the heat call will not reset the board.
Flame out
1. Flame out is considered when flame is lost during heating.
2. When a W signal is present and flame is lost and no longer
sensed, the gas valves will disengage until the next trial
for ignition. The circulating blower and inducer will remain
running.
3. If all retry attempts fail and the flame is still not proven,
there will be a 1 hour lock out before the system resets
automatically.
False flame
1. Flame out of sequence represents a scenario when flame is
sensed while gas valve is de-energized.
2. Inducer and Blower motors will be engaged (if not already
running) and keep running for as long as the fault condition is
present.
FLAME SENSE TROUBLESHOOTING TIPS
LOCKOUT FEATURES
There is a 5 minute self healing recovery which occurs if the
pressure switch is stuck open. The inducer will run for 150
seconds then enter a 5 minute self healing recovery. This cycle
will repeat until the pressure switch closes.
There will be a 1 hour lock out if the flame is not established and
the control will reset automatically.
LED
Status Description Trouble Shooting Tips
ON
Normal
Operation
N/A
OFF
Control Board
Failure
Check for proper input voltage and
check the fuse; if not resolved replace
control.
1
Ignition Failure
Clean or replace the flame sensor,
check the igniter for proper operation &
input voltage, check the transformer’s
common is grounded to earth ground.
2
Pressure Switch
Stuck Closed
Check for contaminated or defective
pressure switch.
3
Pressure Switch
Stuck Open
Check for obstructed pressure switch
tubing or defective pressure switch.
Check for oxidation on terminals,
broken wires, or defective inducer
motor.
4
Limit Switch
Fault
Checked for blocked airflow, blocked
replace high limit switch if defective.
5
Flame Out of
Sequence
Check for intermittent or defective gas
valve and check for dirty or defective
flame sensor.
6
Roll Out Switch
Fault
Check for a cracked heat exchanger,
defective rollout switch, broken wires
on the roll out switch, or replace roll
out switch if required.
7 Weak Flame
Weak flame is caused by carbon build
up on the flame sensor, poor grounds,
or improper placement of flame
sensor . Clean or replace flame sensor,
reassure grounds, ensure flame sensor
is fully enveloped in the flame.
8
Miswired Gas
Valve
Check for shorted or miswired gas
valve, check harness wires for any
shorts or breaks, and check the
pressure switch for proper operation.
9 Unused N/A
10
Hot and Neutral
Reversed
Check for proper polarity of incoming
voltage on the primary and secondary
of the transformer.
11 Brownout
A brownout fault indicates a low
voltage condition. Check the voltage
on the primary and the secondary of
the transformer and ensure there is no
excessive load on the transformer.
LED FAULT CODES
To Next Page
Loading...
Need help?
General
