24 18-CD21D1-12
Installer’s Guide
The manufacturer has a policy of continuous product and product data improvement and reserves the right to
change design and specifications without notice.
File Number 18-CD21D1-12
Supersedes 18-CD21D1-11
Date 08/13
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]
2. LOSS OF FLAME OR GAS SUPPLY FAILURE
If loss of flame occurs during a heating cycle
(when flame is not present at the sensor), the con-
trol module will retry the ignition sequence up to
two times after the sensor cools. If ignition is not
achieved, it will lockout the furnace.
3. POWER FAILURE
If there is a power failure during a heating cycle,
the system will restart the ignition sequence auto-
matically when power is restored, if the thermostat
still calls for heat.
4. INDUCED DRAFT BLOWER FAILURE
If pressure is not sensed by the pressure switch, it
will not allow the gas valve to open, therefore the
unit will not start. If failure occurs during a run-
ning cycle, the pressure switch will cause the gas
valve to close and shut the unit down.
Carbon monoxide, fire or smoke can cause serious bodi-
ly injury, death, and/ or property damage.
A variety of potential sources of carbon monoxide can
be found in a building or dwelling such as gas-fired
clothes dryers, gas cooking stoves, water heaters, fur-
naces and fireplaces. The U.S. Consumer Product
Safety Commission recommends that users of gas-
burning appliances install carbon monoxide detectors
as well as fire and smoke detectors per the manufac-
turers installation instructions to help alert dwelling
occupants of the presence of fire, smoke or unsafe lev-
els of carbon monoxide. These devises should be listed
by Underwriters Laboratories, Inc. Standards for Sin-
gle and Multiple Station Carbon Monoxide Alarms, UL
2034 or CSA International Standard, Residential Car-
bon Monoxide Alarming Devices, CSA 6.19.
NOTE:
The manufacturer of your furnace does not test any de-
tectors and makes no representations regarding any
brand or type of detector.
Failure to follow safety warnings exactly, could
result in a fire or explosion causing property
damage, personal injury or loss of life.
— Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch;
do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier,
call the fire department.
— Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
▲
WARNING
!
Trane
6200 Troup Highway
Tyler, TX 75707
For more information contact
your local dealer (distributor)
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