Ignition Control |
Figure 14
Ignition Control LED Codes
The ignition control LED flashes codes which indicate normal or abnormal operations:
Slow Flash −− Normal operation, no call for heat. One flash per second.
Fast Flash −− Normal operation, call for heat. Two flashes per second.
Steady Off −− Internal failure or no power. (Micro−controller failure; self−check.) Steady On −− Internal control failure. (Micro−controller failure; self−check).
Code 2 −− System lockout −− Failed to detect or sustain flame.
Two flashes in 1 second with a 1−second pause. Code 3 −− Pressure switch open with inducer on or closed with inducer off.
Three flashes in 1−1/2 seconds with a 1−second pause. Code 4 −− High limit /or rollout switch open.
Four flashes in 2 seconds with a 1−second pause. Code 5 −− Flame sensed while gas valve de−energized. Five flashes in 2−1/2 seconds with a 1−second pause. Code 6 −− Roll out switch is open.
Six flashes in three seconds with a one−second pause.
supply airflow, occurs. The main gas valve is closed. The circulating air blower will continue to operate until the blower off delay period has elapsed.
Pressure Switch
If the combustion air inducer motor should fail or if the vent system is blocked, the pressure switch prevents the gas valve from being energized.
Spark Electrode and Flame Sensor Rod
The spark electrode and flame sensor rod are part of the burner assembly. The spark electrode is typically located on the far−left burner. The flame sensor rod is typically located on the far−right burner. If the ignition control does not receive a signal from the flame sensor indicating that the burners have established flame, the main gas valve will close after the 10−second ignition trial period built into the ignition control.
Rollout Switch
The switch is located above the main burners. In the event of a sustained main burner rollout the main gas valve is closed. To reset, push the button on top of the switch.
Limit Control
This control is located inside the heating compartment and is designed to open at abnormally high air temperatures. It resets automatically. The limit switch operates when a high temperature condition, caused by inadequate blower
Auxiliary Limit (−42, −48 & −60 units only)
This control is located in the side of the circulating air blower housing. If the circulating air blower fails to operate, the temperature rises and opens the auxiliary limit. The main gas valve closes. This control resets automatically.
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