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Diagnostic LED (DGN LED) / Error Codes
The Diagnostic LED or DGN LED is located by the
power connector on the ignition control. Refer to
Figure 6. The Diagnostic LED will indicate the status
of the ignition control. Refer to Table 3.
The Diagnostic LED will flash error codes one half
second on and one half second off. Error codes are
separated by a one second pause before the code is
repeated.
LED Color Description
Orange-Yellow Initialization
Green Standby / Normal Operation
Red Fault Indication Code
Table 3
Error
Code
DGN LED status Fault Type
1
Red Ignition Control Internal Failure
2
2 Red Flashes Gas Valve Not Connected
3
3 Red Flashes Ignition/Flame Sense Failure
4
4 Red Flashes Reset Switch is Shorted
5
Slow Red and Green Flashes Low Voltage Detection
6
Fast Red and Orange Flashes Ignition Control is in Reset Delay
TMB2176N
1 Diagnostic (DGN) LED
Figure 6
1