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 ignitor button is actuated, | 1. Ignitor electrode positioned | 1. | Replace pilot assembly | ||||
there is no spark at ODS/pilot |
| wrong | 2. | Replace pilot assembly | |||
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| 2. | Ignitor electrode broken | ||||
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| 3. | Ignitor electrode not con- | 3. | Reconnect ignitor cable | ||
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| nected to ignitor cable | 4. | Free ignitor cable if pinched | ||
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| 4. | Ignitor cable pinched or wet | ||||
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| by any metal or tubing. Keep | ||
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| ignitor cable dry | ||
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| 5. | Broken ignitor cable | 5. | Replace ignitor cable | ||
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| 6. | Bad piezo ignitor | 6. | Replace piezo ignitor valve | ||
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ODS/pilot lights but flame | 1. Control knob not fully pressed in | 1. | Press in control knob fully | ||||
goes out when control knob is | 2. Control knob not pressed in | 2. | After ODS/pilot lights, keep | ||||
released |
| long enough |
| control knob pressed in 30 | |||
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| 3. | Safety interlock system has |
| seconds |
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| 3. | Wait one minute for safety | ||||
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| been triggered |
| interlock system to reset. | ||
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| 4. | Thermocouple connection |
| Repeat ignition operation. | ||
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| 4. | Hand tighten until snug, then | ||||
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| loose at control valve |
| tighten 1/4 turn more | ||
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| 5. | Pilot flame not touching | 5. | A) Replace propane/LP gas | ||
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| thermocouple, which allows |
| cylinder |
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| thermocouple to cool, caus- |
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| ing pilot flame to go out. This |
| B) Clean ODS/pilot (see | ||
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| problem could be caused by |
| Cleaning and Maintenance, | ||
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| one or both of the following: |
| page 7) or replace ODS/pilot | ||
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| A) Low gas pressure |
| assembly |
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| B) Dirty or partially clogged |
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| ODS/pilot |
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| 6. | Thermocouple damaged | 6. | Replace pilot assembly | ||
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| 7. | Control valve damaged | 7. | Replace control valve | ||
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Burner does not light after ODS/ | 1. Burner orifice is clogged | 1. | Clean burner orifice (see Clean- | ||||
pilot is lit |
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| ing and Maintenance, page 7) | |||
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| or replace burner orifice | ||
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| 2. | Inlet gas pressure is too low | 2. | Replace | propane/LP gas | |
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Delayed ignition of burner | 1. Manifold pressure is too low | 1. | Replace | propane/LP gas | |||
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| 2. | Burner orifice is clogged |
| cylinder |
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| 2. | Clean burner orifice (see Clean- | ||
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| ing and Maintenance, page 7) | ||
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| or replace burner orifice | ||
www.desatech.com | 9 |
