Troubleshooting - Lennox Hearth Products Elite Series Installation And Operation Manual

TROUBLESHOOTING

NOTE: When troubleshooting the gas control system, be sure the external gas shut off valve, located at the gas supply inlet is in
the "ON" position.
IMPORTANT: Call your gas supplier or plumber for additional help with any gas control problem. Valve system troubleshooting
should only be accomplished by a qualified service technician.
SYMPTOM
Thin black coating (soot) 1) Improper log or
forms on the viewing ember placement
glass, logs, or firebox ) Improper air shutter
setting
3) Not enough combus-
tion air
4) Incorrect gas pres-
sure
Humming or whistling 1) Normal operating
coming from insert. noise
) Obstructed orifice
opening
3) Defective regulator
A change in flame appear- 1) A change in gas
ance or burner operation. pressure
) Improper ember
placement
Spark igniter will not light 1) No gas supplied to
pilot after repeated tries. unit or air in line
) Defective igniter (no
spark at electrode)
3) Defective or mis-
aligned electrode at pilot
(spark at electrode)
Pilot will not stay lit after 1) Vent Safety Snap
carefully following lighting Switch shut down.
instructions. ) Improper Flame
impingement
3) Low gas inlet pres-
sure
4) Defective thermopile
5) Bad connection
6)Defective automatic
valve operator
Pilot burning, but no 1) Pilot has gone out
flame on main burner with ) Rocker switch,
valve knob "ON", rocker thermostat, or wires
switch and thermostat defective
"ON". 3) Thermopile may not
be generating sufficient
millivolts
4) Plugged burner
orifice.
PROBABLE CAUSE
1) See Log Set and Ember Installation on Pages 9 and 10. If there is soot in one spe-
cific location, the rockwool below this location needs to be adjusted. This can be done by
pulling embers forward slightly. If the flames have soot tails, the shutter will need to be
opened.
) If sooting continues open air shutter (see Air Shutter Adjustment on Page 13)
3) Check for debris obstructing air flow in valve compartment under insert or in front of
lower venting.
4) Have gas supplier check for correct gas pressure (7" W.C. natural gas: 11" W.C. pro-
pane gas)
1) See Quiet Operation on Page 16. The noise may be reduced by slightly turning down
the flame. Turning the flame down will reduce the heat output of the insert.
) If noise is excessive or is "whistling" have your gas supplier check the regulator and
orifices and replace if necessary.
3) If noise is excessive or is "whistling" have your gas supplier check the regulator and
orifices and replace if necessary.
1) Have your gas supplier check for correct gas pressure (7" W.C. / po. C.E. [1.74 kPa]
natural gas; 11" W.C. / po. C.E. [2.74 kPa] LP gas). NOTE: NEVER BLOCK OR OBSTRUCT
AIR INTAKE OR OUTLET VENTS.
) See Log Set and Ember Installation Instructions.
1) Check gas supply. To purge, hold in gas cock on valve for 1-2 minutes and try again.
) Check for spark at electrode and pilot, if no spark and electrode wire is properly con-
nected, replace igniter and igniter wire.
3) Using a match, light pilot. If pilot lights, turn off pilot and trigger the igniter again.
If pilot lights, an intermittent gas/air supply may be the problem, if longer purge will
not light - check gap between electrode and pilot - should be 1/8 inch (3 mm) to have a
strong spark. If OK, replace pilot.
1) Snap switch activated, have venting system inspected for blockage, down draft or bad
snap switch.
) Check pilot flame adjustment (see "Maintenance" section).
3) Check inlet pressure and adjust pilot if necessary.
4) Be sure wire connections from thermopile are tight at gas valve terminals and at vent
safety snap switch.
5a) Either rocker switch or thermostat wires may be grounded. Remove wires from valve
terminals. If pilot stays lit, trace switch wiring for a ground. May be grounded to insert or
gas supply.
5b) Check open circuit millivolt output of thermopile. Reading should be greater than
325mV. Also check thermopile wire for kinks that can cause loss of mV. Replace faulty
thermopile if wire is okay and reading is less than 325mV.
6)Turn valve knob to "ON" and thermostat (if installed) to 90º. Millivolt meter should read
greater than 100 mV. If reading is OK and burner does not turn on, replace gas valve
(qualified service technician only).
1) See Lighting Instructions.
) Disconnect rocker switch and thermostat wires at terminals 1 and 3 on valve. Jumper
across from 1 to 3 with pilot lit. If burner comes on either rocker switch, thermostat, or
wiring is not functioning. If not, jumper wires across switch wires at gas valve. If burner
comes on, wires are faulty or connections are bad.
3) Check thermopile with millivolt meter (see Maintenance and Servicing), recheck
symptom #2.
4) Check burner for stoppage and remove.
CORRECTIVE ACTION
1