Service Guide

TROUBLESHOOTING
46
•Furnace notoperating.
•Integratedcontrol module
diagnostic LEDisflashingTEN
(10) flashes. 10 FLASHES
•OpenFuse/No 24V
powertointegrated
controlmodule
•Highvoltage surge
blowsoff thefuse.
•Replace theFuse. •Verifylinevoltage
supply is turned off
before proceeding
with corrections
•Furnace notoperating.
•Integratedcontrol module
diagnostic LEDisflashingELEVEN
(11) flashes.
11 FLASHES
•Igniter Open •Improperlyconnected
igniter.
•Bad igniter.
•Poorunitground.
•Poorburnerground.
•Check andcorrect
wiring from integrated
controlmodule
to igniter.
•Replace badigniter.
•Check &correct unit
ground wire.
•Replace badintegrated
•Turnpower OFFprior
to repair.
•Replace igniter
w/proper replacement
part.
•Readprecautions in
“Electrostatic
Discharge" section
•Furnace notoperating.
•Integratedcontrol module
diagnostic LEDisflashingTWELVE
(12) flashes.
12 FLASHES
•Inducer RelayFault
•Improper Grounding
•Imp
roperlyconnected
inducer.
•Bad inducer.
•Poorunitground.
•Faultyintegrated
controlmodule.
•Check andcorrect
wiring from integrated
controlmodule
to inducer.
•Check forBlockagein
inducer&in Vent /
replaceInducer.
•Check &correct unit
ground wire.
•Replace badintegrated
controlmodule.
•Turnpower OFFprior
to repair.
•Replace inducer
w/proper replacement
part.
•Readprecautions in
“Electrostatic
Discharge" section
of manual.
•Furnace failstooperate.
•Integratedcontrol module
diagnostic LED is
flashing continuously.
CONTINOUS
RAPIDFLASH
•Polarityof115 or
24 volt poweris
reversed.
•Polarityof115 volt AC
powertofurnace or
integrated control
module is reversed.
•Orangeand gray wires
to transformerare
reversed.
•Poorunitground.
•Reviewwiringdiagram
to correctpolarity.
•Reverse orange and
gray wiresgoing to
transformer.
•Verifyproperground.
Correctifnecessary.
•Tur
npower OFFprior
to repair
1
Integrated controlmodulewillautomatically attempttoreset from lockoutafter onehour.
2
LEDFlash code will ceaseifpower to thecontrol module is interruptedthrough thedisconnectordoorswitch.