Desa Handi-Heater SPC-9 Manual De Funcionamiento E Instalacion página 11

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 burner
Burner backfiring during com-
bustion
Slight smoke or odor during
initial operation
113997-01B
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Control knob not fully pressed in
2. Control knob not pressed in
long enough
3. Safety interlock system has
been triggered
4. Thermocouple connection
loose at control valve
5. Pilot flame not touching
thermocouple, which allows
thermocouple to cool, caus-
ing pilot flame to go out. This
problem could be caused by
one or both of the following:
A) Low gas pressure
B) Dirty or partially clogged
ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice is clogged
2. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
1. Burner orifice is clogged or
damaged
2. Inlet gas pressure is too low
3. Burner damaged
4. Gas regulator defective
1. Residues from manufacturing
processes
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REMEDY
1. Press in control knob fully
2. After ODS/pilot lights, keep
control knob pressed in 30
seconds
3. Wait one minute for safety
interlock system to reset.
Repeat ignition operation.
4. Hand tighten until snug, then
tighten 1/4 turn more
5. A) Replace propane/LP gas
cylinder
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 8) or replace ODS/pilot
assembly
6. Replace pilot assembly
7. Replace control valve
1. Clean burner orifice (see Clean-
ing and Maintenance, page 8)
or replace burner orifice
2. Replace propane/LP gas
cylinder
1. Replace propane/LP gas
cylinder
2. Clean burner orifice (see Clean-
ing and Maintenance, page 8)
or replace burner orifice
1. Clean burner orifice (see Clean-
ing and Maintenance, page 8)
or replace burner orifice
2. Replace propane/LP gas
cylinder
3. Replace burner
4. Replace gas regulator
1. Problem will stop after a few
hours of operation
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