Desa VVDA24R - Manual (Page 16)

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16 901272
VENTED GAS LOGS
OBSERVED PROBLEM
When ignitor button is pressed, there is no
spark at pilot
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
REMEDY
1. Reconnect ignitor cable
2. Free ignitor cable if pinched by any
metal or tubing. Keep ignitor cable dry
3. Scrape away paint on bracket for better
contact with ground on piezo ignitor
4. Replace ignitor cable
5. Replace piezo ignitor
6. Replace electrode
7. Reposition electrode
1. Turn on gas supply or open manual
shutoff valve
2. Turn control knob to PILOT position
3. Press in control knob while in PILOT
position
4. Continue holding down control knob.
Repeat igniting operation until air is re-
moved
5. Adjust pilot flame for approximately
2" blue flame
6. Clean pilot (see Cleaning and Mainte-
nance, page 22) or replace pilot assembly
7. Replace gas control
1. Press in control knob fully
2. After pilot lights, keep control knob
pressed in 30 seconds
3. Fully open manual shut-off valve
4. A) Contact local natural gas company
B) Clean pilot (see Cleaning and Mainte-
nance, page 22) 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 approximately
2" blue flame
2. Replace pilot orifice set
TROUBLESHOOTING
Continued
POSSIBLE CAUSE
1. Ignitor electrode not connected to igni-
tor cable
2. Ignitor cable pinched or wet
3. Bad ground on piezo ignitor
4. Broken ignitor cable
5. Bad piezo ignitor
6. Ignitor electrode broken
7. Ignitor electrode positioned wrong
1. Gas supply turned off or manual shutoff
valve closed
2. Control knob not in PILOT position
3. Control knob not pressed in while in
PILOT position
4. Air in gas lines when 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. Manual shutoff valve not fully open
4. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot 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 pilot
5. Thermocouple connection loose at con-
trol 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 disconnected or im-
properly connected
1. Pilot flame needs adjusting
2. Wrong pilot orifice
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