Lennox G32V Series Service Literature page 91

PROBLEM 6: BURNERS LIGHT WITH HEATING DEMAND BUT UNIT SHUTS DOWN
6.5
− Combustion air blower energizes
with a heating demand.
− Burners light.
− Diagnostic lights flash watch guard
flame failure.
− NOTE" Unit might go into 60 minute
Watchguard mode depending on in-
termittent nature of sensor signal.
LED#1−Alternating Slow Flash
LED#2−Alternating Slow Flash
PROBLEM 7: CONTROL SIGNALS LOW FLAME SENSE DURING HEATING MODE
Condition
7.0
− Unit operates correctly but the diag-
nostic lights flash low flame sense
code code.
LED#1−Slow Flash
LED#2−Fast Flash
Condition
8.0
− AM radio interference
PREMATURELY (CONT.)
Loose sensor wire connection causes
intermittent loss of flame signal.
Possible Cause
Sense rod is improperly located on
Sense rod is contaminated.
PROBLEM 8: RF STATIC DURING TIME FOR IGNITION
Possible Cause
Ignitor operation
6.5.1
7.1.1
the burner.
7.1.2
8.1.1
Page 91
ACTION 1 − Check that the sensor is properly lo-
cated.
ACTION 2 − Check that the sense wire is properly
attached to both the sensor and the control. Pay
extra attention to the pin connectors.
Corrective Action/Comments
ACTION 1 − Check the sense rod for proper loca-
tion on the burner. Properly locate the sense rod
or replace if rod cannot be located correctly.
ACTION 1 − Check sense rod for contamination
or coated surface. Clean the sense rod with steel
wool or replace sensor. DO NOT USE SAND PA-
PER TO CLEAN ROD. SAND PAPER WILL
CONTRIBUTE TO THE CONTAMINATION
PROBLEM.
Corrective Action/Comments
−
ACTION 1 Call Technical Support, Dallas