TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | |||
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ODS/pilot lights but flame | 1. Control knob not fully | 1. | Press in control knob fully |
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goes out when control knob is |
| pressed in | 2. | After ODS/pilot lights, keep con- | |
released | 2. Control knob not pressed in | ||||
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| 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. | Thermocouple connection | 5. | Hand tighten until snug, then | |
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| loose at control valve |
| tighten 1/4 turn more | |
| 6. | Pilot flame not touching ther- | 6. | 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 |
| B) Clean ODS/pilot (see | |
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| pilot flame to go out. This |
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| problem could be caused by |
| Cleaning and Maintenance, | |
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| one or both of the following: |
| page 16) 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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| 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. Burner orifice is clogged | 1. | Clean burner (see Cleaning | ||
pilot is lit |
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| and Maintenance, page 16) or | |
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| replace burner orifice | |
| 2. | Inlet gas pressure is too low | 2. | Contact local natural or pro- | |
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| pane/LP gas company | |
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Delayed ignition of burner | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | ||
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| pane/LP gas company | |
| 2. | Burner orifice is clogged | 2. | Clean burner (see Cleaning | |
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| and Maintenance, page 16) or | |
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| replace burner orifice | |
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Burner backfiring during | 1. Burner orifice is clogged or | 1. | Clean burner (see Cleaning | ||
combustion |
| damaged |
| and Maintenance, page 16) or | |
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| replace burner orifice | |
| 2. | Burner damaged | 2. | Replace burner | |
| 3. | Gas regulator defective | 3. | Replace gas regulator | |
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Yellow flame during burner | 1. Not enough air | 1. | Check burner for dirt and | ||
combustion |
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| debris. If found, clean burner | |
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| (see Cleaning and Mainte- | |
| 2. | Gas regulator defective |
| nance, page 16) | |
| 2. | Replace gas regulator | |||
| 3. | Clogged or dirty burner | 3. | Clean burner (see Cleaning | |
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| and Maintenance, page 16) | |
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Slightsmokeorodorduringinitial | 1. Residues from manufacturing | 1. | Problem will stop after a few | ||
operation |
| processes |
| hours of operation | |
www.desatech.com | 19 |
