Vanguard VGL850N Owner's Operation And Installation Manual page 16

VENTED TYPE DECORATIVE APPLIANCE
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
Pilot goes out when wall switch is ON
Spark ignitor will not light pilot after re-
peated triggering of red button
VGL850 Series
®
POSSIBLE CAUSE
1. Millivolt output on thermopile too high
1. Defective ignitor (no spark at electrode)
2. Defective pilot or misaligned electrode
at pilot (spark at electrode)
3. No gas or low gas pressure
4. No propane/LP in tank
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REMEDY
1. Replace thermopile
1. Check for spark at the electrode and pi-
2. Using a match, light pilot. If pilot lights,
3. A) Check remote shut off valves from
4. Check propane/LP supply. You may be
16
lot; if no spark and electrode wire is
properly connected, replace ignitor
turn off pilot and trigger the red button
again. If pilot lights, an improper gas/air
mixture caused the improper lighting and
a longer purge period is recommended. If
pilot will not light, check gap at electrode
and pilot. Gap should be 1/8" to have a
strong spark. If okay, replace pilot
fireplace. Usually there is a valve
near the fireplace and sometimes
there is a valve near the main. There
can be more than one (1) valve be-
tween the fireplace and main
B) Low pressure can be caused by a va-
riety of situations such as bent line,
too narrow diameter of pipe, or even
low line pressure. Check for kinked
lines. If none, consult with plumber
or gas supplier
out of fuel
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