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 con- | ||
released |
| long enough |
| trol knob pressed in 30 seconds |
| 3. | Equipment shutoff valve not | 3. | Fully open equipment shutoff |
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| fully open |
| valve |
| 4. | Thermocouple connection | 4. | Hand tighten until snug, then |
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| loose at control valve |
| tighten 1/4 turn more |
| 5. | Pilot flame not touching ther- | 5. | 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 |
|
| pilot flame to go out. This |
| Cleaning and Maintenance, |
|
| problem could be caused by |
| page 15) or replace ODS/pilot |
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| one or both of the following: |
| assembly |
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| A) Low gas pressure |
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| B) Dirty or partially clogged |
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| ODS/pilot |
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| 6. | Thermocouple damaged | 6. | 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 (thermostat |
| terlock system to reset. Repeat |
|
| models only) |
| ignition operation |
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| |
Burner(s) does not light after | 1. Burner orifice(s) is clogged | 1. | Clean burner orifice(s) (see | |
ODS/pilot is lit |
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| Cleaning and Maintenance, |
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| page 15) or replace burner |
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|
| orifice(s) |
| 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(s) | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | |
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| pane/LP gas company |
| 2. | Burner orifice(s) is clogged | 2. | Clean burner orifice(s) (see |
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|
|
| Cleaning and Maintenance, |
|
|
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| page 15) or replace burner |
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|
| orifice(s) |
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| |
Burner backfiring during com- | 1. Burner orifice(s) is clogged or | 1. | Clean burner orifice(s) (see | |
bustion |
| damaged |
| Cleaning and Maintenance, |
|
|
|
| page 15) or replace burner |
|
|
|
| orifice(s) |
| 2. | Burner damaged | 2. | Replace burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
www.desatech.com | 17 |
