TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
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ODS/pilot lights but flame | 1. Control knob not fully | 1. | Press in control knob fully | |
goes out when control knob |
| pressed in |
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is released | 2. Control knob not pressed in | 2. | After ODS/pilot lights, keep | |
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| long enough |
| control knob pressed in 30 |
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| seconds |
| 3. | Safety interlock system has | 3. | Wait one minute for safety |
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| been triggered |
| interlock system to reset. |
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| Repeat ignition operation |
| 4. | Equipment shutoff valve not | 4. | Fully open equipment shut- |
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| fully open |
| off valve |
| 5. | Thermocouple connection | 5. | Hand tighten until snug, |
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| loose at control valve |
| then tighten 1/4 turn more |
| 6. | Pilot flame not touching | 6. | A) Contact local natural or |
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| thermocouple, which al- |
| propane/LP gas company |
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| lows thermocouple to cool, |
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| causing pilot flame to go |
| B) Clean ODS/pilot (see |
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| out. This problem could be |
| Cleaning and Maintenance, |
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| caused by one or both of |
| page 18) or replace ODS/ |
|
| the following: |
| pilot 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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| 7. | Thermocouple damaged | 7. | Replace pilot assembly |
| 8. | Control valve damaged | 8. | Replace control valve |
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Burner does not light after | 1. Burner orifice is clogged | 1. | Clean burner (see Cleaning | |
ODS/pilot is lit |
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| and Maintenance, page 18) |
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| or replace burner orifice |
| 2. | Inlet gas pressure is too | 2. | Contact local natural or |
|
| low |
| propane/LP gas company |
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| |
Delayed ignition of burner | 1. Manifold pressure is too | 1. | Contact local natural or | |
|
| low |
| propane/LP gas company |
| 2. | Burner orifice is clogged | 2. | Clean burner (see Cleaning |
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|
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| and Maintenance, page 18) |
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|
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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 18) |
|
|
|
| or replace burner orifice |
| 2. | Burner damaged | 2. | Replace burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
20 | www.desatech.com |