www.desatech.com
113110-01H
31
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. Equipment shutoff valve
not fully open
5. Pilot flame not touching
thermocouple, which al
-
lows thermocouple to cool,
causing 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 connection
loose at control valve
7. Thermocouple damaged
8. Control valve damaged
1. Inlet gas pressure is too
low
2. Burner orifice is clogged
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 is clogged
1. Burner orifice is clogged or
damaged
2. Damaged burner
3. Gas regulator defective
4. Inlet gas pressure is too
low
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. Fully open equipment shut-
off valve
5. A) Contact local natural or
propane/LP gas company
B) Clean ODS/pilot (see
Cleaning and Maintenance,
page 28) or replace ODS/
pilot assembly
6. Hand tighten until snug,
then tighten 1/4 turn more
7. Replace pilot assembly
8. Replace control valve
1. Contact local natural or
propane/LP gas company
2. Clean burner (see
Cleaning
and Maintenance,
page 28)
or replace burner orifice
3. Reconnect leads (see
Wir-
ing Diagram
, page 29)
4. Replace battery in hand-
held remote and receiver
1. Contact local natural or
propane/LP gas company
2. Clean burner (see
Cleaning
and Maintenance
, page 28)
or replace burner orifice
1. Clean burner (see
Cleaning
and Maintenance,
page 28)
or replace burner orifice
2. Replace damaged burner
3. Replace gas regulator
4. Contact local natural or
propane/LP gas company
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
combustion
TROUBLESHOOTING
Continued
