3DJH
E--SureLight Ignition Control Troubleshooting Guide
UPON INITIAL POWER UP, REMOVE ALL THERMOSTAT DEMANDS TO THE UNIT
PROBLEM: 1 UNIT FAILS TO OPERATE IN THE COOLING, HEATING, OR CONTINUOUS FAN MODE
Condition
Possible Cause
Corrective Action / Comments
1.1
-- Both diagnostic lights fail to light
up.
1.1.1
Main voltage 120V not supplied to
unit.
ACTION 1 -- Check 120V main voltage.
Determine cause of main power failure.
LED#1--Off
LED#2--Off
1.1.2
Miswiring of furnace or improper
connections.
ACTION 1 -- Check for correct wiring of 120V
to power make up box and transformer.
ACTION 2 -- Check 24V wiring to control
board.
1.1.3
Circuit breaker tripped or fails to
close.
ACTION 1 -- Replace circuit breaker if it is re-
set but does not have continuity.
ACTION 2 -- If circuit breaker still trips, check
for short.
1.1.4
Door interlock switch failure.
ACTION 1 -- Check that door switch is activated
when door is closed.
ACTION 2 -- Check wire connections to switch,
replace loose connectors.
ACTION 3 -- Check continuity of switch in
closed position. Replace if malfunctioning
1.1.5
Transformer Failure.
ACTION 1 -- Check that transformer output is
24V. Replace if malfunctioning
1.1.6
Failed control board.
ACTION 1 -- If all the above items have been
checked, replace board.
1.2
-- Diagnostic lights flash the roll--
out code.
1.2.1
Roll--out switch open.
ACTION 1 -- Manually reset the roll--out
switch by pushing the top button.
ACTION 2 -- Determine the cause of the roll--
out switch activation before leaving furnace.
out code.
LED#1 O
1.2.2
Roll--out switch failure.
ACTION 1 -- Check continuity across roll--out
switch. Replace roll--out switch if switch is
reset but does not have continuity.
LED#1--On,
LED#2--Slow Flash
1.2.3
Mis iring or improper connections
ACTION 1 -- Check wiring connections to
LED#2 Slow Flash
Miswiring or improper connections
at roll--out switch.
ACTION 1 Check wiring connections to
switch.
1.2.4
Nine pin connector failure
ACTION 1 -- Check 9--pin connector for prop-
er connection to control board.
ACTION 2 -- Check continuity of the multi
plug pin.
1.3
-- On initial power--up the comb. air
blower does not energize.
blower does not energize.
-- Diagnostic lights flash the re-
verse polarity code.
1.3.1
120V main power polarity re-
versed.
ACTION 1 -- Check the 120V has line and neu-
tral correctly input into control.
ACTION 2 -- Reverse the line and neutral at the
120V field connection.
LED#1--Fast Flash,
LED#2--Slow Flash.
versed.
120V field connection.
1.4
-- On initial power up the combus-
tion air blower does not energize.
-- Diagnostic lights flash normal
power on operation
1.4.1
Open combustion air blower motor
circuit.
ACTION 1 -- Check for 120V to combustion air
blower. If no power, check wire and connec-
tions.
power on operation.
LED#1--Slow Flash
LED#2--Slow Flash
1.4.2
Failed combustion air blower mo-
tor.
ACTION 1 -- If power is present at blower, re-
place blower.