Troubleshooting - Ignition Controller - LG AR-DR12-05A Installation And Operation Manual

INDIRECT GAS FIRED FURNACES

Troubleshooting - Ignition Controller

The ignition controller has a diagnostic LED light at the top right of the controller. The LED light will flash GREEN for normal operation or
RED for an error.
The following are the green LED codes of operation:
The following are the red LED codes of error:
Airflow Fault (6 red flashes)
An airflow fault may occur for the following reasons:
• During the start-up sequence, the controller relay turned the combustion blower on, but the blower did not prove airflow in 30 seconds.
• During the start-up sequence, the airflow was proven before the controller turned the combustion blower on. If this condition lasts for 30
seconds, the control will error out.
To fix fault, determine which error above is occurring, remove power from controller, fix problem and re-power controller.
Flame Fault (2 red flashes)
If the main gas valve fails to close completely and maintains a flame, the full-time flame sensor circuit will detect it and energize the combus-
tion blower. Should the main valve later close completely and remove the flame signal, the combustion will be de-energized.
Due to our policy of continuous product innovation, some specifications may change without notification.
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