Status Leds - Trane 4YCY4042C Installer's Manual

Installer's Guide

Status LEDs

IGN Board Diagnostic Codes
There are two LEDs on the IGN board that provide status and
diagnostic information. Refer to Table 8 for a description of the
LED codes.
Status LED
Steady OFF Check Power or Failed Board 2 Flashes
Slow Flash Rate Normal, No Call for Heat
Fast Flash Rate Not used
Steady ON Normal, No Call for Heat
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.
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Table 8. IGN LED Diagnostic Indicators
IGN Diagnostic Indicators Flash Codes
3 Flashes Pressure switch problem detected
4 Flashes
5 Flashes
6 Flashes Flame Rollout Switch open
7 Flashes Thermostat miswired; W1 & W2
*
Liteport LED
System Lockout: Failed to detect or
sustain flame
High Limit switch protection device
open
Flame sensed and gas valve not
energized or flame sensed and no "W"
signal