TROUBLESHOOTING
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OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
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ODS/pilot lights but flame goes | 1. Control knob not fully pressed in | 1. | Press in control knob fully | |
out when control knob is re- | 2. Control knob not pressed in | 2. | After ODS/pilot lights, keep con- | |
leased |
| long enough |
| trol knob pressed in 30 seconds |
| 3. | Safety interlock system has | 3. | Wait one minute for safety in- |
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| been triggered |
| terlock system to reset. Repeat |
| 4. | Equipment shutoff valve not |
| ignition operation |
| 4. | Fully open equipment shutoff | ||
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| fully open |
| valve |
| 5. | Pilot flame not touching ther- | 5. | A) Contact local natural or |
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| mocouple, which allows ther- |
| propane/LP gas company |
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| mocouple to cool, causing pilot |
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| flame to go out. This problem |
| B) Clean ODS/pilot (see |
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| could be caused by one or both |
| Cleaning and Maintenance, |
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| of the following: |
| page 21) or replace ODS/pilot |
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| A) Low gas pressure |
| assembly |
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| B) Dirty or partially clogged |
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| ODS/pilot |
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| 6. | Thermocouple connection | 6. | Hand tighten until snug, then |
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| loose at control valve |
| tighten 1/4 turn more |
| 7. | Thermocouple damaged | 7. | Replace pilot assembly |
| 8. | Control valve damaged | 8. | Replace control valve |
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Burner does not light after ODS/ | 1. Inlet gas pressure is too low | 1. | Contact local natural or pro- | |
pilot is lit | 2. | Burner orifice(s) clogged |
| pane/LP gas company |
| 2. | Clean burner(s) (see Cleaning | ||
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| and Maintenance, page 21) or |
| 3. | Remote selector in OFF |
| replace burner orifice(s) |
| 3. | Put remote selector in ON | ||
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| position |
| position |
| 4. | Wire disconnected from gas | 4. | See Wiring Diagram, page 20 |
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| control |
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Delayed ignition of burner | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | |
| 2. | Burner orifice(s) clogged |
| pane/LP gas company |
| 2. | Clean burner(s) (see Cleaning | ||
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| and Maintenance, page 21) or |
| 3. | Mislocated crossover tube |
| replace burner orifice(s) |
| 3. | Contact qualified service person | ||
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Burner backfiring during com- | 1. Burner orifice is clogged or | 1. | Clean burner (see Cleaning | |
bustion |
| damaged |
| and Maintenance, page 21) or |
| 2. | Damaged burner |
| replace burner orifice |
| 2. | Replace damaged burner | ||
| 3. | Gas appliance regulator de- | 3. | Replace gas regulator |
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| fective |
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| 4. | External gas regulator defective | 4. | Correct external gas regulator |
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| or set to incorrect pressure |
| pressure or replace if defective |
www.desatech.com | 23 |
