18-CD29D1-11 39
Installer’s Guide
TABLE 21
INTEGRATED FURNACE CONTROL ERROR FLASH CODES
Flashing Slow --- Normal - No call for Heat
Flashing Fast --- Normal - Call for Heat
Continuous ON --- Replace IFC
Continuous OFF --- Check Power
2 Flashes --- System Lockout (Retries or Recycles exceeded)
3 Flashes ---
Draft Pressure Error - Possible problems
a) Venting problem
b) Pressure switch problem
c) Inducer problem
4 Flashes --- Open High Limit Device
5 Flashes --- Flame sensed when no flame should be present
6 Flashes --- 115 Volt AC power reversed or Poor Grounding
7 Flashes --- Gas valve circuit error
8 Flashes --- Low flame sense signal
9 Flashes ---
Check Ignitor circuit and Line "N" to 24VAC "Com-
mon" voltage (< 2volts)
(possible grounding problem)
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