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)

 

Draft Pressure Error - Possible problems:

3 Flashes ---

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]

 

18-CD22D1-8

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Trane DX1B060A9H31B, UX1C100A9H41B, UX1B080A9H31B, UX1B060A9H31B, UX1D120A9H51B Integrated Furnace Control Error Flash Codes