18-CD19D5-25 39
Installer’s Guide
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 Temperature Limit Circuit
5 Flashes --- Flame sensed when no flame should be present
6 Flashes --- 115 volt AC power reversed, poor grounding or system voltage too low
7 Flashes --- Gas valve circuit error
8 Flashes --- Low flame sense signal
9 Flashes ---
Check Ignitor Circuit and Line "N" to 24VAC "Common" voltage (≤ 2 volts)
[possible grounding problem]
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