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20
Seconds 0 45
On
Off
On
Off
On
Off
Indoor Fan
Outdoor Fan
And
Compressor
Thermostat
Timing Chart for Normal Cooling Operation
Integrated Ignition Control
Diagnostic Signal Chart
Heating
Timing Chart for Integrated Ignition Control Normal Heating Operation
Light Signal
Refer to Abnormal
Operation Number
Continuous Light 1 Internal Control Failure
1 Flash 2 System Lockout
2 Flashes 3 Pressure Switch Stuck Closed
3 Flashes 4 Pressure Switch Stuck Open
4 Flashes 5 Open Limit Control
5 Flashes 6 Open Rollout Control
Continuous Flashing 7 Flame Sensed No Call For Heat
On
Off
Open
Closed
On
Off
Closed
Open
On
Off
On
Off
Seconds* 0 17 21 24 54 0 5 60, 90, 120,
or 15 or 180
Air Circulation Blower
Gas Valve
Ignitor
Pressure Switch
Combustion Blower
Thermostat
* Timings may vary ±2 seconds.
Induced Draft Blower