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Integrated Control Diagnostic Codes
RED LED
Flash Code
Off
On
Heartbeat
1
Continuous Rapid Flash
1
2
3
4
5
6
7
8
9
10
11
12
13
Note - 1
Note - 2
Note
Note
No power to control or board fault detected
Board fault detected,
Normal Operation - Idle, Continuous Fan, Cool
Call For Heat / Burner Operation
2
Reverse Line Voltage Polarity
Improper Earth Ground
Burner failed to light, or lost flame during heat demand
Low Flame Signal - check flame sensor
Watchguard - burner failed to light, exceeded maximum number of retries or recycles.
Not Used
Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer than 3
minutes
Rollout Switch Open
Pressure Switch failed to close or opened during heat demand
Watchguard - Pressure Switch opened 5 times during one heat demand
Pressure Switch stuck closed prior to activation of combustion air inducer
Flame Sensed without gas valve energized
Low Line Voltage
A "Heartbeat" is indicated by a "Slow Flash" - 1 sec on 1 sec off, repeating
A "Rapid Flash" is indicated by a 1/3 second on, 1/3 second off, repeating
Error codes are indicated by a "rapid flash" - the LED flashes X times at 1/3 second on
1/3 second off, remains off for 3 seconds then repeats.
Last 5 error codes are stored in memory including when power is shut off to the
unit. - To recall, pressand release button, most recent will be displayed first, LED off for 3
sec, then next error code is displayed, etc. To clear error codes, depress and hold button
longer than 5 seconds.
Diagnostic Codes / Status of Furnace
Notes
Page 26
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