Desa LMFP33PR - Manual (Page 25)

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OBSERVED PROBLEM
ODS/pilot lights but flame goes
out when control knob is released
Burner does not light after ODS/
pilot is lit
Delayed ignition of one or both
burners
Burner backfiring during com-
bustion
Slight smoke or odor during ini-
tial operation
POSSIBLE CAUSE
1. Control knob not fully pressed in
2. Control knob not pressed in
long enough
3. Equipment shutoff valve not
fully open
4. Pilot flame not touching ther-
mocouple, which allows ther-
mocouple to cool, causing pi-
lot flame to go out. This prob-
lem could be caused by one or
both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
5. Thermocouple connection
loose at control valve
6. Thermocouple damaged
7. Control valve damaged
1. Inlet gas pressure is too low
2. Burner orifice(s) clogged
3. Thermopile leads disconnected
or improperly connected
4. Burner will not come on in
remote position
1. Manifold pressure is too low
2. Burner orifice(s) clogged
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manufacturing
processes and logs curing
REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep con-
trol knob pressed in 30 seconds
3. Fully open equipment shutoff
valve
4. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 23) or replace ODS/pi-
lot assembly
5. Hand tighten until snug, then
tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner(s) (see Cleaning
and Maintenance, page 23) or
replace burner orifice(s)
3. Reconnect leads (see Wiring
Diagram, page 28)
4. Replace battery in transmitter
and receiver
1. Contact local natural or pro-
pane/LP gas company
2. Clean burner(s) (see Cleaning
and Maintenance, page 23) or
replace burner orifice(s)
1. Clean burner (see Cleaning
and Maintenance, page 23) or
replace burner orifice(s)
2. Replace damaged burner
3. Replace gas regulator
1. Check burner for dirt and de-
bris. If found, clean burner
(see Cleaning and Mainte-
nance, page 23)
2. Replace gas control
3. Problem will stop after a few
hours of operation
TROUBLESHOOTING
Continued