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 at | 1. Switch in OFF position (mod- | 1. | Push switch on valve to | ||
the same time, there is no spark |
| ule gives long steady beep) | 2. | position | |||
at ODS/pilot |
| 2. Ignitor electrode not con- | Reconnect ignitor cable | ||||
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| 3. | nected to ignitor cable | 3. | Free ignitor cable if pinched | |
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| Ignitor cable pinched or wet | ||||
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| by any metal or tubing. Keep | |
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| 4. | Broken ignitor cable | 4. | ignitor cable dry | |
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| Replace ignitor cable | ||||
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| 5. | Bad piezo ignitor | 5. | Replace piezo ignitor | |
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| 6. | Ignitor electrode positioned | 6. | Replace pilot assembly | |
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| 7. | wrong or broken | 7. | Replace module | |
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| Bad 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 | 2. | equipment shutoff valve | |||
no ignition |
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| 2. Control knob not in PILOT | Turn control knob to PILOT | |||
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| 3. | position | 3. | position | |
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| Control knob not pressed in | Press in control knob while in | |||
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| 4. | while in PILOT position | 4. | PILOT position | |
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| Air in gas lines when in- | Continue holding down con- | |||
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| stalled |
| trol knob. Repeat igniting op- | |
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| 5. | Depleted gas supply (pro- | 5. | eration until air is removed | |
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| Contact local propane/LP gas | ||||
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| 6. | pane/LP only) | 6. | company | |
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| ODS/pilot is clogged | Clean ODS/pilot (see Cleaning | |||
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| and Maintenance, page 19) or | |
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| 7. | Gas regulator setting is not | 7. | replace ODS/pilot assembly | |
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| Replace gas regulator | ||||
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| 8. | correct | 8. | Replace module | |
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| Bad 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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| 2. | Wire disconnected from gas | 2. | pane/LP gas company | |
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| Reconnect leads (see Wiring | ||||
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| 3. | control | 3. | Diagram, page 24) | |
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| Burner orifice(s) clogged | Clean burner (see Cleaning | |||
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| and Maintenance, page 19) or | |
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| 5. | Bad module | 5. | replace burner orifice(s) | |
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| Replace module |
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Delayed ignition burner | 1. Manifold pressure is too | 1. | Contact local natural or pro- | ||||
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| 2. | low | 2. | pane/LP gas company | |
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| Burner orifice(s) clogged | Clean burner (see Cleaning | |||
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| and Maintenance, page 19) or | |
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| replace burner orifice | |
www.desatech.com | 21 |
