TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY |
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ODS/pilot lights but flame goes | 1. Control knob not fully pressed | 1. | Press in control knob fully | |||
out when control knob is re- |
| in | 2. | After ODS/pilot lights, keep | ||
leased | 2. Control knob not pressed in | |||||
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| long enough |
| control knob pressed in 30 | ||
| 3. | Safety interlock system has been | 3. | seconds |
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| Wait one minute for safety in- | |||||
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| triggered |
| terlock system to reset. Repeat | ||
| 4. | Equipment shutoff valve not | 4. | ignition operation |
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| Fully open equipment shutoff | |||||
| 5. | fully open | 5. | valve |
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| Thermocouple connection | Hand tighten until snug, then | ||||
| 6. | loose at control valve | 6. | tighten 1/4 turn more | ||
| Pilot flame not touching ther- | A) Contact local propane/LP or | ||||
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| mocouple, which allows ther- |
| natural 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 20) 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 20) | |
| 2. | Inlet gas pressure is too low | 2. | or replace burner orifice | ||
| Contact local propane/LP or | |||||
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| natural gas company | ||
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Delayed ignition of burner | 1. Manifold pressure is too low | 1. | Contact local propane/LP or | |||
| 2. | Burner orifice is clogged | 2. | natural gas company | ||
| Clean burner (see | Cleaning | ||||
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| and Maintenance, | page 20) | |
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| or replace burner orifice | ||
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Burner backfiring during com- | 1. Burner orifice is clogged or | 1. | Clean burner (see Cleaning | |||
bustion |
| damaged |
| and Maintenance, | page 20) | |
| 2. | Burner damaged | 2. | or replace burner orifice | ||
| Replace burner pressure | |||||
| 3. | Low inlet gas pressure | 3. | Contact local propane/LP or | ||
| 4. | Gas regulator defective | 4. | natural gas company | ||
| Replace gas regulator | |||||
www.desatech.com | 23 |
