TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE | REMEDY |
ODS/pilot lights but flame goes out when control knob is re- leased
1.Control knob not fully pressed in
2.Control knob not pressed in long enough
3.Equipment shutoff valve not fully open
4.Pilot flame not touching thermocouple, which allows thermocouple to cool, caus- ing pilot flame to go out. This problem could be caused by one or both of the following:
A)Low gas pressure
B)Dirty or partially clogged ODS/pilot
5.Thermocouple connection loose at control valve
6.Thermocouple damaged
7.Control valve damaged
1.Press in control knob fully
2.After ODS/pilot lights, keep control knob pressed in 30 seconds
3.Fully open equipment shutoff valve
4.A) Contact local natural or propane/LP gas company
B)Clean ODS/pilot (see Cleaning and Maintenance, page 23) or replace ODS/pilot assembly
5.Hand tighten until snug, then tighten 1/4 turn more
6.Replace pilot assembly
7.Replace control valve
One or both 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 |
| 2. | Clean burner(s) (see Cleaning | ||
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| and Maintenance, page 23) or |
| 3. | Mislocated crossover tube |
| replace burner orifice(s) |
| 3. | Contact qualified service per- | ||
| 4. | Remote selector in OFF |
| son |
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| position | 4. | Put remote selector in ON |
| 5. | Wire disconnected from gas |
| position |
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| control | 5. | See Wiring Diagram, page 28 |
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Delayed ignition burner | 1. Manifold pressure is too | 1. | Contact local natural or pro- | |
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| low |
| pane/LP gas company |
| 2. | Burner orifice clogged | 2. | Clean burner (see Cleaning |
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| and Maintenance, page 23) or |
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| 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 23) or |
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| replace burner orifice |
| 2. | Damaged burner | 2. | Replace damaged burner |
| 3. | Gas regulator defective | 3. | Replace gas control |
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Slight smoke or odor during initial | 1. Not enough air | 1. | Check burner for dirt and | |
operation |
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| debris. If found, clean burner |
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| (see Cleaning and Mainte- |
| 2. | Gas regulator defective |
| nance, page 23) |
| 2. | Replace gas control | ||
| 3. | Residues from manufactur- | 3. | Problem will stop after a few |
|
| ing processes and logs cur- |
| hours of operation |
www.desatech.com | 25 |
