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Excessive flame impingement or blockage 4. Improper fuel/air mixture 5. Excessive gas supply/pressure 1. Contact local natural or propane/LP gas company 2. Adjust damper wide open and/or have fireplace and venting professionally cleaned and checked 3. Separate the logs to allow more flame passage 4. Remove any foreign items from the flame pattern and/or check for proper orifice sizing 5. Preheat flue in very cold weather Burner is excessively noisy 1. Passage of air/gas across irregular sur1. Relieve any tight bends or kinks in gas (Note: The movement and combustion of faces supply line gas will create low, unavoidable levels of 2. Excessive gas pressure on natural gas 2. Check/reset gas regulator pressure (see noise.) units Figure 10, page 7) Burner flame is too low or too high 1. Incorrect gas supply or pressure 1. Check for proper gas supply pressure 2. Blocked burner orifice or burner mani2. Free burner orifice and manifold ports fold ports of any burrs, paint, or other blockage 3. Improper burner orifice size 3. Verify proper burner orifice sizing (see Figure 2, page 4) When ignitor button is pressed, there is no 1. Ignitor electrode not connected to igni1. Reconnect ignitor cable spark at pilot tor cable 2. Ignitor cable pinched or wet 2. Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry 3. Bad ground on piezo ignitor 3. Scrape away paint on bracket for better contact with ground on piezo ignitor 4. Broken ignitor cable 4. Replace ignitor cable 5. Bad piezo ignitor 5. Replace piezo ignitor 6. Ignitor electrode broken 6. Replace electrode 7. Ignitor electrode positioned wrong 7. Reposition electrode When ignitor button is pressed, there is 1. Gas supply turned off or equipment 1. Turn on gas supply or open equipment spark at pilot but no ignition shutoff valve closed shutoff valve 2. Control knob not in PILOT position 2. Turn control knob to PILOT position 3. Control knob not pressed in while in 3. Press in control knob while in PILOT PILOT position position 4. Air in gas lines when installed 4. Continue holding down control knob. Repeat igniting operation until air is removed 5. Pilot adjustment screw closed 5. Adjust pilot flame for approximately 2" blue flame 6. Pilot is clogged 6. Clean pilot (see Cleaning and Maintenance, page 10) or replace pilot assembly 7. Low gas pressure 7. Replace gas control For more information, visit more information, visit 901268-01D 12 12 TROUBLESHOOTING TROUBLESHOOTING Continued OBSERVED PROBLEM POSSIBLE CAUSE REMEDY Pilot lights but flame goes out when control knob is released 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 allows 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. Press in control knob fully 2. After pilot lights, keep control knob pressed in 30 seconds 3. Fully open equipment shutoff valve 4. A) Contact local natural or propane/LP gas company B) Clean pilot (see Cleaning and Maintenance, page 10) or replace pilot assembly 5. Hand tighten until snug, then tighten 1/4 turn more 6. Replace thermocouple 7. Replace control valve Burner does not light after pilot is lit 1. Burner orifice clogged 1. Clean burner orifice 2. Inlet gas pressure is too low 2. Contact local natural or propane/LP gas company 3. Burner orifice diameter is too small 3. Replace burner orifice 4. Thermocouple leads disconnected or im- 4. Reconnect leads properly connected Delayed ignition burner 1. Pilot flame needs adjusting 1. Adjust pilot flame for approximately 2" blue flame 2. Wrong pilot orifice 2. Replace pilot orifice set For more information, visit more information, visit www.desatec...

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