Lennox RAVELLE 30 Installation And Operation Instructions Manual page 36

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)
forms on the viewing
glass, logs, or firebox
Humming or whistling
coming from fireplace .
A change in flame appear-
ance or burner operation .
Spark igniter will not light
pilot after repeated tries .
Pilot will not stay lit after
carefully following lighting
instructions .
Main burner will not burn .
36
PROBABLE CAUSE
Improper log or ember See Log Set Installation on Page 24 . If there is soot in one specific location, the glowing
placement embers (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 .
Improper air shutter
setting If sooting continues open air shutter (see Air Shutter Adjustment on Page 31).
Not enough combus- Check for debris obstructing air flow in valve compartment under fireplace or in front of
tion air lower venting .
Normal operating noise See Quiet Operation on Page 32 . The noise may be reduced by slightly turning down the
flame . Turning the flame down will reduce the heat output of the fireplace .
Obstructed orifice If noise is excessive or is "whistling" have your gas supplier check the regulator and
opening orifices and replace if necessary .
A change in gas pres- Have your gas supplier check for correct gas pressure (7" W .C . / po . C .E . [1 .74 kPa] natu-
sure ral gas; 11" W .C . / po . C .E . [2 .74 kPa] LP gas) . NOTE: NEVER BLOCK OR OBSTRUCT AIR
INTAKE OR OUTLET VENTS.
Improper log, ember or See Log Set Installation on Page 24.
volcanic stone place-
ment
No gas supplied to unit Check gas supply . To purge, hold in gas cock on valve for 1-2 minutes and try again .
or air in line
Defective igniter (no Check for spark at electrode and pilot, if no spark and electrode wire is properly con-
spark at electrode) nected, replace igniter and igniter wire .
Defective or misaligned Using a match, light pilot . If pilot lights, turn off pilot and trigger the igniter again . If pilot
electrode at pilot (spark lights, an intermittent gas/air supply may be the problem, if longer purge will not light
at electrode) - check gap between electrode and pilot - should be 1/8 inch (3 mm) to have a strong
spark . If OK, replace pilot .
Low gas inlet pressure Check inlet pressure and adjust pilot if necessary .
Defective thermopile Be sure wire connections from thermopile are tight at gas valve terminals .
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 fireplace
or gas supply .
Defective automatic Check open circuit millivolt output of thermopile . Reading should be greater than 325mV .
valve operator 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 .
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) .
Pilot has gone out See Lighting Instructions.
Rocker switch, thermo- Disconnect rocker switch and thermostat wires at terminals 1 and 3 on valve . Jumper
stat, or wires defective across from 1 to 3 with pilot lit . If burner comes on either rocker switch, thermostat, or
wiring is not functioning .
Thermopile may not be Check thermopile with millivolt meter (see Maintenance and Servicing), recheck symp-
generating sufficient tom #2 .
millivolts
CORRECTIVE ACTION