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 | ||
goes out when control knob is |
| pressed in | 2. | After ODS/pilot lights, keep con- | |
released | 2. Control knob not pressed in | ||||
| 3. | long enough | 3. | trol knob pressed in 30 seconds | |
| Safety interlock system has | Wait one minute for safety in- | |||
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| been triggered |
| terlock system to reset. Repeat | |
| 4. | Equipment shutoff valve not | 4. | ignition operation | |
| Fully open equipment shutoff | ||||
| 5. | fully open | 5. | valve | |
| Thermocouple connection | Hand tighten until snug, then | |||
| 6. | loose at control valve | 6. | tighten 1/4 turn more | |
| Pilot flame not touching | A) Contact local natural or | |||
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| thermocouple, which allows |
| propane/LP gas company | |
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| thermocouple to cool, caus- |
| B) Clean ODS/pilot (see | |
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| ing 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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| 7. | ODS/pilot | 7. | Replace pilot assembly | |
| Thermocouple damaged | ||||
| 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 | |
| 2. | Inlet gas pressure is too low | 2. | replace burner orifice | |
| 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 | 1. | Contact local natural or pro- | ||
| 2. | low | 2. | pane/LP gas company | |
| Burner orifice is clogged | 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 | |
| 2. | Burner damaged | 2. | replace burner orifice | |
| Replace burner | ||||
| 3. | Gas regulator defective | 3. | Replace gas regulator | |
18 | www.desatech.com |
