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88-4YCA4001-1A-EN
Table 13.
IGN LED Diagnostic Indicators
Status LED
Liteport LED
Steady OFF
Check Power or Failed Board
2 Flashes
System Lockout: Failed to detect or sustain
flame
Slow Flash Rate
Normal, No Call for Heat
3 Flashes
Pressure switch problem detected
Fast Flash Rate
Not used
4 Flashes
High Limit switch protection device open
Steady ON
Normal, Call for Heat
5 Flashes
Flame sensed and gas valve not energized or
flame sensed and no “W” signal.
6 Flashes
Flame Rollout Switch open
7 Flashes
Thermostat miswired; W! & W2
Fast Flash Rate:
The LED will flash on for 1/4 second and off for 1/4 second.
Slow Flash Rate:
The LED will flash on for 3/4 second, then off for 1/4 second.
The pause between groups of fast flashes is 3 seconds.
