TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
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ODS/pilot lights but flame goes | 1. Control knob not fully pressed in | 1. | Press in control knob fully | |
out when control knob is re- | 2. Control knob not pressed in | 2. | After ODS/pilot lights, keep con- | |
leased |
| long enough |
| trol knob pressed in 30 seconds |
| 3. | Safety interlock system has | 3. | Wait one minute for safety in- |
|
| been triggered |
| terlock system to reset. Repeat |
| 4. | Equipment shutoff valve not |
| ignition operation |
| 4. | Fully open equipment shutoff | ||
|
| fully open |
| valve |
| 5. | Pilot flame not touching ther- | 5. | A) Contact local natural or |
|
| mocouple, which allows ther- |
| propane/LP gas company |
|
| mocouple to cool, causing pilot |
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|
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| flame to go out. This problem |
| B) Clean ODS/pilot (see |
|
| could be caused by one or both |
| Cleaning and Maintenance, |
|
| of the following: |
| page 21) or replace ODS/pilot |
|
| A) Low gas pressure |
| assembly |
|
| 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 |
| 7. | Thermocouple damaged | 7. | Replace pilot assembly |
| 8. | Control valve damaged | 8. | Replace control valve |
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| |
Burner does not light after ODS/ | 1. Inlet gas pressure is too low | 1. | Contact local natural or pro- | |
pilot is lit | 2. | Burner orifice(s) clogged |
| pane/LP gas company |
| 2. | Clean burner(s) (see Cleaning | ||
|
|
|
| and Maintenance, page 21) or |
| 3. | Burner orifice(s) diameter is |
| replace burner orifice(s) |
| 3. | Replace burner orifice(s) | ||
|
| too small | 4. | Put remote selector in ON |
| 4. | Remote selector in OFF | ||
|
| position |
| position |
| 5. | Wire disconnected from gas | 5. | See Wiring Diagram, page 20 |
|
| control |
|
|
Delayed ignition of burner | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | |
| 2. | Burner orifice(s) clogged |
| pane/LP gas company |
| 2. | Clean burner(s) (see Cleaning | ||
|
|
|
| and Maintenance, page 21) or |
| 3. | Mislocated crossover tube |
| replace burner orifice(s) |
| 3. | 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 21) or |
| 2. | Damaged burner |
| replace burner orifice |
| 2. | Replace damaged burner | ||
| 3. | Gas regulator defective | 3. | Replace gas regulator |
www.desatech.com | 23 |
