Desa CVDA24M Owner's Manual page 14

OBSERVED PROBLEM
When ignitor button is
pressed, there is spark at
pilot but no ignition
Pilot lights but flame goes
out when control knob is
released
Burner does not light after
pilot is lit
Delayed ignition burner
14
TROUbLESHOOTING
Continued
POSSIBLE CAUSE
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. A i r i n g a s l i n e s w h e n
installed
5. Pilot adjustment screw
closed
6. Pilot is clogged
7. Low gas pressure
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
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
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. Burner orifice diameter is
too small
4. Thermocouple leads discon-
nected or improperly con-
nected
1. Pilot flame needs adjusting
2. Wrong pilot orifice
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REMEDY
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. Adjust pilot flame for ap-
proximately 2" blue flame
6. Clean pilot (see Cleaning
and Maintenance, page 12)
or replace pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After pilot lights, keep con-
trol knob pressed in 30
seconds
3. Fully open equipment shut-
off valve
4. A) Contact local natural gas
company
B) Clean pilot (see Cleaning
and Maintenance, page 12)
or replace pilot assembly
5. Hand tighten until snug,
then tighten 1/4 turn more
6. Replace thermocouple
7. Replace control valve
1. Clean burner orifice
2. Contact local natural or
propane/LP gas company
3. Replace burner orifice
4. Reconnect leads
1. Adjust pilot flame for ap-
proximately 2" blue flame
2. Replace pilot orifice set
901268-01H