www.desatech.com
122493-01C
20
5. Blow air into primary air holes on injector
holder.
6. In case any large clumps of dust have now
been pushed into burner, repeat steps 3
and 4.
Clean pilot assembly also. A yellow tip on pilot
flame indicates dust and dirt in pilot assembly.
There is a small pilot air inlet hole about 2"
from where pilot flame comes out of pilot as
-
sembly (see Figure 25, page 19). With unit off,
lightly blow air through air inlet hole. You may
blow through a drinking straw if compressed
air is not available.
TROUbLESHOOTING
WARNING: Turn off and unplug heater and let cool before servicing.
Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean
ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
POSSIBLE CAUSE
1. Ignitor electrode not con-
nected to ignitor cable
2. Ignitor cable pinched or
wet
3. Broken ignitor cable
4. Bad piezo ignitor
5. Ignitor electrode broken
6. Ignitor electrode positioned
wrong
1. Gas supply turned off or
equipment shutoff valve
closed
2. Control knob not in PILOT
position
3. Control knob not pressed in
while in PILOT position
4. Air in gas lines when in
-
stalled
5. Depleted gas supply (pro-
pane/LP only)
6. ODS/pilot is clogged
7. Gas regulator setting is not
correct
OBSERVED PROBLEM
When control knob is pressed
in and turned to PILOT
, there
is not spark at ODS/pilot
When control knob is pressed
in and turned to PILOT
, there
is spark at ODS/pilot but no
ignition
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched
by any metal or tubing.
Keep ignitor cable dry
3. Replace valve
4. Replace valve
5. Replace valve
6. Replace valve
1. Turn on gas supply or open
equipment shutoff valve
2. Turn control knob to PILOT
position
3. Press in control knob while
in PILOT position
4. Continue holding down con
-
trol knob. Repeat igniting op-
eration until air is removed
5. Contact local propane/LP
gas company
6. Clean ODS/pilot (see
Clean-
ing and Maintenance,
page
19) or replace ODS/pilot
assembly
7. Replace gas regulator
CLEANING AND MAINTENANCE
Continued
LOGS
• If you remove logs for cleaning, refer to
Install-
ing Logs,
page 16, to properly replace logs.
• Replace log(s) if broken or chipped (dime-
sized or larger).
BURNER PRIMARY AIR HOLES
Air is drawn into burner through the 8 holes
in brass fitting at entrance to burner. These
holes may become blocked with dust or lint.
Periodically inspect these holes for any block-
age and clean as necessary. Blocked air holes
will create soot.
