Desa Comfort Glow S26NTA Owner's Operation And Installation Manual page 19

OBSERVED PROBLEM
ODS/pilot lights but flame goes
out when control knob is re-
leased
Burner does not light after ODS/
pilot is lit
Delayed ignition burner
Burner backfiring during com-
bustion
Slight smoke or odor during ini-
tial operation
Moisture/condensation noticed
on windows
110361-01E
TROUBLESHOOTING
Continued
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. Burner orifice clogged
2. Inlet gas pressure is too low
3. Thermopile leads discon-
nected or improperly con-
nected
4. Burners will not come on in
remote position
1. Manifold pressure is too low
2. Burner orifice 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
1. Not enough combustion/ven-
tilation air
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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 gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
pages 16 and 17) or replace
ODS/pilot assembly
5. Hand tighten until snug, then
tighten 1/4 turn more
6. Replace pilot assembly
7. Replace control valve
1. Clean burner (see Cleaning and
Maintenance, pages 16 and 17)
or replace burner orifice
2. Contact local gas company
3. Reconnect leads (see wiring
diagram)
4. Replace battery in transmitter
and receiver
1. Contact local gas company
2. Clean burner (see Cleaning and
Maintenance, pages 16 and 17)
or replace burner orifice
1. Clean burner (see Cleaning and
Maintenance, pages 16 and 17)
or replace burner orifice
2. Replace damaged burner
3. Replace gas control
1. Check burner for dirt and de-
bris. If found, clean burner
(see Cleaning and Mainte-
nance, pages 16 and 17)
2. Replace gas control
3. Problem will stop after a few
hours of operation
1. Refer to Air for Combustion
and Ventilation requirements
(page 5)
19