ICM Controls ICM2813 Installation, Operation & Application Manual page 3

LED
Status Description
ON Normal operation
OFF Control board failure
1 Ignition failure (soft
lockout)
2 Pressure switch stuck
closed
3 Pressure switch stuck
open
4 Limit switch fault
5 Flame out of sequence
6 Roll out switch fault
7 Weak flame
8 Miswired gas valve
9 Unused
10 Hot and neutral
reversed
11 Brownout
Flame not established
1. If the flame is not established or proven during the initial sequence, the gas is shut off (if energized) and the board will enter a
retry mode. There will be four more successive attempts allowed each having a 15 second inducer purge between attempts.
2. After the initial attempt and four successive attempts, if flame is still not established and proven there will be a 1 hour lock
out before the system will reset automatically. To reset the control before the 1 hour lockout has elapsed, cycle off and 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 call off and on.
However if the problem is a false flame (flame 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.
LED Fault Codes
N/A
Check for proper input voltage and check the fuse; if not resolved replace control.
Clean or replace the flame sensor, check the igniter for proper operation & input voltage, check
the transformer's common is grounded to earth ground.
Check for contaminated or defective pressure switch.
Check for obstructed pressure switch tubing or defective pressure switch. Check for oxidation on
terminals, broken wires, or defective inducer motor .
Checked for blocked airflow, blocked duct work, and dirty filter. Check or replace high limit switch
if defective.
Check for intermittent or defective gas valve and check for dirty or defective flame sensor.
Check for a cracked heat exchanger, defective rollout switch , broken wires on the roll out switch,
or replace roll out switch if required.
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.
Check for shorted or mis-wired gas valve, check harness wires for any shorts or breaks, and
check the pressure switch for proper operation.
N/A
Check for proper polarity of incoming voltage on the primary and secondary of the transformer.
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.
Flame Sense Troubleshooting Tips
Trouble Shooting Tips