TROUBLESHOOTING
WARNING: Turn off heater and let cool before servicing. Only a qualified service person should service and repair heater.
CAUTION: Never use a wire, needle or similar object to clean ODS/pilot. This can damage ODS/pilot unit.
Note: All troubleshooting items are listed in order of operation.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||||
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When | and | are pressed | 1. Ignitor electrode not con- | 1. | Reconnect ignitor cable | |
at the same time, there is no spark |
| nected to ignitor cable |
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at ODS/pilot |
| 2. Ignitor cable pinched or wet | 2. | Free ignitor cable if pinched | ||
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| by any metal or tubing. Keep |
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| ignitor cable dry |
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| 3. | Broken ignitor cable | 3. | Replace ignitor cable |
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| 4. | Bad piezo ignitor | 4. | Replace piezo ignitor |
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| 5. | Ignitor electrode positioned | 5. | Replace pilot assembly |
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| wrong or broken |
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| 6. | Bad module | 6. | Replace module |
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When | and | are pressed, | 1. Gas supply turned off or equip- | 1. | Turn on gas supply or open | |
there is spark at ODS/pilot but |
| ment shutoff valve closed |
| equipment shutoff valve | ||
no ignition |
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| 2. Control knob not in PILOT | 2. | Turn control knob to PILOT | |
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| position |
| position |
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| 3. | Control knob not pressed in | 3. | Press in control knob while in |
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| while in PILOT position |
| PILOT position |
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| 4. | Air in gas lines when in- | 4. | Continue holding down con- |
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| stalled |
| trol knob. Repeat igniting op- |
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| eration until air is removed |
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| 5. | Depleted gas supply (pro- | 5. | Contact local propane/LP gas |
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| pane/LP only) |
| company |
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| 6. | ODS/pilot is clogged | 6. | Clean ODS/pilot (see Cleaning |
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| and Maintenance, page 19) or |
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| replace ODS/pilot assembly |
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| 7. | Gas regulator setting is not | 7. | Replace gas regulator |
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| correct |
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| 8. | Bad module | 8. | Replace module |
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Burner does not light after pilot | 1. Inlet gas pressure is too low | 1. | Contact local natural or pro- | |||
is lit |
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| pane/LP gas company |
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| 2. | Burner orifice(s) clogged | 2. | Clean burner (see Cleaning |
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| and Maintenance, page 19) or |
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| replace burner orifice(s) |
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| 3. | Burner orifice(s) diameter is | 3. | Replace burner orifice(s) |
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| too small |
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| 4. | Wire disconnected from gas | 4. | Reconnect leads (see Wiring |
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| control |
| Diagram, page 24) |
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| 5. | Bad module | 5. | Replace module |
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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 |
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| 2. | Clean burner (see Cleaning |
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| 2. | Burner orifice(s) clogged |
| and Maintenance, page 19) or |
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| replace burner orifice |
20 | www.desatech.com |
