www.desatech.com
124184-01B
13
TROUbLESHOOTING
WARNING: Turn off log set and let cool before servicing. Only a
qualified service person should service and repair log set.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Log set is smoking/sooting
excessively.
(Note: It is natural and un-
avoidable for vented gas log
sets to produce moderate
levels of carbon (soot) where
flames contact the logs. This
is especially true with propane/
LP gas.)
1. Poor fuel quality.
2. Fireplace venting system
not drafting properly.
3. Excessive flame impinge-
ment or blockage.
4. Improper fuel/air mixture.
5. Excessive gas supply/pres-
sure.
1. Contact local natural or
propane/LP gas company.
2. Adjust damper wide open
and/or have fireplace and
venting professionally
cleaned and checked.
3. Separate the logs to allow
more flame passage.
4. Remove any foreign items
from the flame pattern and/
or check for proper orifice
sizing.
5. Preheat flue in very cold
weather.
Burner is excessively noisy.
(Note: The movement and
combustion of gas will cre-
ate low, unavoidable levels
of noise.)
1. Passage of air/gas across
irregular surfaces.
2. Excessive gas pressure on
natural gas units.
1. Relieve any tight bends or
kinks in gas supply line.
2. Check/reset gas regulator
pressure (see Figure 10,
page 8).
Burner flame is too low or
too high.
1. Incorrect gas supply or
pressure.
2. Blocked burner orifice or
burner manifold ports.
3. Improper burner orifice
size.
1. Check for proper gas supply
pressure.
2. Free burner orifice and
manifold ports of any burrs,
paint, or other blockage.
3. Verify proper burner orifice siz-
ing (see Figure 2, page 5).
When ignitor button is pressed,
there is no spark at pilot.
1. Ignitor electrode not con-
nected to ignitor cable.
2. Ignitor cable pinched or
wet.
3. Bad ground on piezo ig-
nitor.
4. Broken ignitor cable.
5. Bad piezo ignitor.
6. Ignitor electrode broken.
7. Ignitor electrode positioned
wrong.
1. Reconnect ignitor cable.
2. Free ignitor cable if pinched
by any metal or tubing. Keep
ignitor cable dry.
3. Scrape away paint on brack-
et for better contact with
ground on piezo ignitor.
4. Replace ignitor cable.
5. Replace piezo ignitor.
6. Replace electrode.
7. Reposition electrode.
