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VIII-Troubleshooting-SureLight Control
SURELIGHT - TROUBLE SHOOTING 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
Blown fuse
ACTION 1 -
Replace fuse.
ACTION 2 -
If fuse still blows, 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, reĆ
place loose connectors.
ACTION 3 -
Check continuity of switch in closed
position. Replace if defective.
1.1.5
Transformer Failure.
ACTION 1 -
Check that transformer output is
24V. Replace if defective.
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.
code.
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
Miswiring or improper connections at
ACTION 1 -
Check wiring connections to switch
LED#2-Slow Flash
Miswiring or improper connections at
roll-out switch.
ACTION 1 -
Check wiring connections to switch.
1.2.4
12 pin connector failure
ACTION 1 -
Check 12-pin connector for proper
connection to control board.
ACTION 2 -
Check continuity of the multi plug
pin.
1.3
- On initial power-up the comb. air inĆ
ducer does not energize.
ducer does not energize.
- Diagnostic lights flash the reverse
polarity code.
1.3.1
120V main power polarity reversed.
ACTION 1 -
Check the 120V has line and neutral
correctly input into control.
ACTION 2 -
Reverse the line and neutral at the
120V field connection.
LED#1-Fast Flash,
LED#2-Slow Flash.
120V field connection.
1.4
- On initial power up the combustion
air inducer does not energize.
- Diagnostic lights flash normal power
on operation.
1.4.1
Open combustion air inducer motor
circuit.
ACTION 1 -
Check for 120V to combustion air
inducer. If no power, check wire and connecĆ
tions.
on operation.
LED#1-Slow Flash
LED#2-Slow Flash
1.4.2
Failed combustion air inducer motor.
ACTION 1 -
If power is present at blower, replace
blower.
