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 | |
| 3. | Equipment shutoff valve not | 3. | seconds | |
| Fully open equipment shutoff | ||||
| 4. | fully open | 4. | valve | |
| Pilot flame not touching ther- | 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 25) 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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| 5. | ODS/pilot | 5. | Hand tighten until snug, then | |
| Thermocouple connection | ||||
| 6. | loose at control valve | 6. | tighten 1/4 turn more | |
| Thermocouple damaged | Replace pilot assembly | |||
| 7. | Control valve damaged | 7. | Replace control valve | |
| 8. | Safety interlock system has | 8. | Wait one minute for safety in- | |
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| been triggered |
| terlock system to reset. Repeat | |
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| ignition operation. | |
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Burner does not light after | 1. Inlet gas pressure is too low | 1. | Contact local natural or pro- | ||
ODS/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 25) | |
| 3. | Thermopile leads disconnect- | 3. | or replace burner orifice(s) | |
| Reconnect leads (see Wiring | ||||
| 4. | ed or improperly connected | 4. | Diagram, page 26) | |
| Burner will not come on in | Replace battery in transmitter | |||
| 5. | remote position | 5. | and receiver | |
| Wire disconnected from gas con- | See Wiring Diagram, page 26 | |||
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| trol (Remote ready models only) |
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Delayed ignition of one or both | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | ||
burners | 2. | Burner orifice(s) clogged | 2. | pane/LP gas company | |
| Clean burner(s) (see Cleaning | ||||
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| and Maintenance, page 25) or | |
| 3. | Mislocated crossover tube | 3. | replace burner orifice(s) | |
| 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 25) | |
| 2. | Damaged burner | 2. | or replace burner orifice(s) | |
| Replace damaged burner | ||||
| 3. | Gas regulator defective | 3. | Replace gas regulator | |
28 | www.desatech.com |