TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||||
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ODS/pilot lights but flame | 1. Control knob not fully pressed in | 1. | Press in control knob fully | |||
goes out when control knob is | 2. Control knob not pressed in | 2. | After ODS/pilot lights, keep | |||
released |
| long enough |
| control knob pressed in 30 | ||
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| 3. | Safety interlock system has |
| seconds | |
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| 3. | Wait one minute for safety | |||
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| been triggered |
| interlock system to reset. | |
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| 4. | Equipment shutoff valve not |
| Repeat ignition operation | |
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| 4. | Fully open equipment shutoff | |||
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| fully open |
| valve | |
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| 5. | Pilot flame not touching | 5. | A) Contact local natural or | |
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| thermocouple, which allows |
| propane/LP gas company | |
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| thermocouple to cool, caus- |
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| ing pilot flame to go out. This |
| B) Clean ODS/pilot (see | |
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| problem could be caused by |
| Cleaning and Maintenance, | |
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| one or both of the following: |
| page 19) 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 | |
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| 7. | Thermocouple damaged | 7. | Replace pilot assembly | |
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| 8. | Control valve damaged | 8. | Replace control valve | |
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One or more burners do not light | 1. Inlet gas pressure is too low | 1. | Contact local natural or pro- | |||
after ODS/pilot is lit | 2. | Burner orifice(s) clogged |
| pane/LP gas company | ||
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| 2. | Clean burner(s) (see Cleaning | |||
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| and Maintenance, page 19) or | |
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| 3. | Mislocated crossover tube |
| replace burner orifice(s) | |
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| 3. | Contact qualified service | |||
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| person | |
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Delayed ignition of one or more | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | |||
burners | 2. | Burner orifice(s) clogged |
| pane/LP gas company | ||
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| 2. | Clean burner(s) (see Cleaning | |||
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| and Maintenance, page 19) or | |
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| replace burner orifice(s) | |
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| 3. | Mislocated crossover tube | 3. | Contact qualified service | |
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| 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 19) | ||
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| or replace burner orifice | |
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| 2. | Damaged burner | 2. | Replace damaged burner | |
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| 3. | Gas regulator defective | 3. | Replace gas regulator | |
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Yellow flame in burner during | 1. Not enough air | 1. | Check burner(s) for dirt | |||
burner combustion |
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| and debris. If found, clean | ||
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| burner(s) (see Cleaning and | |
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| 2. | Gas regulator defective |
| Maintenance, page 19) | |
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| 2. | Replace gas regulator | |||
www.desatech.com | 21 |
