Surelight Control - Lennox G32V Series Service Literature

4− SureLight Control Board
UPON INITIAL POWER UP, REMOVE ALL THERMOSTAT DEMANDS TO THE UNIT
Unless otherwise noted, condition applies to all G32V units.
PROBLEM: 1 UNIT FAILS TO OPERATE IN THE COOLING, HEATING, OR CONTINUOUS FAN MODE
Condition
1.1
− Both diagnostic lights fail to light up.
LED#1−Off
LED#2−Off
1.2
G32V−1 through −4 Units Only
− Diagnostic lights flash the roll−out Diagnostic lights flash the roll out
code.
LED#1−On, LED#1−On,
LED#2−Slow Flash
1.3
− On initial power−up the comb. air
blower does not energize. blower does not energize.
− Diagnostic lights flash the reverse
polarity code.
LED#1−Fast Flash,
LED#2−Slow Flash.
1.4
G32V−1 through −4 Units Only
− On initial power up the combustion air
blower does not energize.
− Diagnostic lights flash normal power
on operation. on operation
LED#1−Slow Flash
LED#2−Slow Flash
Possible Cause
1.1.1
Main voltage 120V not supplied to unit.
1.1.2
Miswiring of furnace or improper con-
nections.
1.1.3
Circuit breaker tripped or fails to
close.
1.1.4
Door interlock switch failure.
1.1.5
Transformer Failure.
1.1.6
Failed control board.
1.2.1
Roll−out switch open.
1.2.2
Roll−out switch failure.
1.2.3
Miswiring or improper connections at Mis iring or improper connections at
roll−out switch.
1.2.4
Nine pin connector failure
1.3.1
120V main power polarity reversed.
1.4.1
Open combustion air blower motor cir-
cuit.
1.4.2
Failed combustion air blower motor.
Page 86
Corrective Action / Comments
ACTION 1 − Check 120V main voltage.
Determine cause of main power failure.
ACTION 1 − Check for correct wiring of 120V to
power make up box and transformer.
ACTION 2 − Check 24V wiring to control board.
ACTION 1 − Replace circuit breaker if it is reset
but does not have continuity.
ACTION 2 − If circuit breaker still trips, check for
short.
ACTION 1 − Check that door switch is activated
when door is closed.
ACTION 2 − Check wire connections to switch, re-
place loose connectors.
ACTION 3 − Check continuity of switch in closed
position. Replace if malfunctioning
ACTION 1 − Check that transformer output is
24V. Replace if malfunctioning
ACTION 1 − If all the above items have been
checked, replace board.
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.
ACTION 1 − Check continuity across roll−out
switch. Replace roll−out switch if switch is reset
but does not have continuity.
ACTION 1 − Check wiring connections to switch. ACTION 1 − Check wiring connections to switch
ACTION 1 − Check 9−pin connector for proper
connection to control board.
ACTION 2 − Check continuity of the multi plug
pin.
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. 120V field connection.
ACTION 1 − Check for 120V to combustion air
blower. If no power, check wire and connec-
tions.
ACTION 1 − If power is present at blower, replace
blower.