®VMH10TNA
VENT-FREE NATURAL GAS COMPACT FIREPLACE
TROUBLESHOOTING
Note: For additional help, visit DESA International’s technical service web site at www.desatech.com.
Note: All troubleshooting items are listed in order of operation.
WARNING: Turn off and un- plug fireplace and let cool before servicing. Only a qualified ser- vice person should service and repair fireplace.
CAUTION: Never use a wire, needle, or similar object to clean ODS/pilot. This can damage ODS/ pilot unit.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
When ignitor button is pressed, there is no | 1. | Ignitor cable pinched or wet | 1. | Free ignitor cable if pinched by any |
spark at ODS/pilot |
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| metal or tubing. Keep ignitor cable dry |
| 2. | Ignitor electrode not connected to ignitor | 2. | Reconnect ignitor cable |
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| cable |
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| 3. | Broken ignitor cable | 3. | Replace ignitor cable |
| 4. | Bad piezo ignitor | 4. | Replace piezo ignitor |
| 5. | Ignitor electrode broken | 5. | Replace ignitor |
| 6. | Ignitor electrode positioned wrong | 6. | Replace ignitor |
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When ignitor button is pressed, there is | 1. | Gas supply turned off or manual shutoff | 1. | Turn on gas supply or open manual |
spark at ODS/pilot but no ignition |
| valve closed |
| shutoff valve |
| 2. | Control knob not in PILOT position | 2. | Turn control knob to PILOT position |
| 3. | Control knob not pressed in while in | 3. | Press in control knob while in PILOT |
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| PILOT position |
| position |
| 4. | Air in gas lines when installed | 4. | Continue holding down control knob. Re- |
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| peat igniting operation until air is removed |
| 5. | ODS/pilot is clogged | 5. | Clean ODS/pilot (see Cleaning and |
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| Maintenance, page 23) or replace ODS/ |
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| pilot assembly |
| 6. | Gas regulator setting is not correct | 6. | Replace gas regulator |
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ODS/pilot lights but flame goes out when | 1. | Control knob not fully pressed in | 1. | Press in control knob fully |
control knob is released | 2. | Control knob not pressed in long enough | 2. | After ODS/pilot lights, keep control |
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| knob pressed in 30 seconds |
| 3. | Safety interlock system has been triggered | 3. | Wait one minute for safety interlock sys- |
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| tem to reset. Repeat ignition operation |
| 4. | Manual shutoff valve not fully open | 4. | Fully open manual |
| 5. | Thermocouple connection loose at con- | 5. | Hand tighten until snug, then tighten 1/4 |
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| trol valve |
| turn more |
| 6. | Pilot flame not touching thermocouple, | 6. | A) Contact local natural gas company |
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| which allows thermocouple to cool, |
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| causing pilot flame to go out. This prob- |
| B) Clean ODS/pilot (see Cleaning and |
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| lem could be caused by one or both of |
| Maintenance, page 23) or replace ODS/ |
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| the following: |
| pilot assembly |
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| A) Low gas pressure |
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| B) Dirty or partially clogged ODS/pilot |
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| 7. | Thermocouple damaged | 7. | Replace thermocouple |
| 8. | Control valve damaged | 8. | Replace control valve |
www.desatech.com
20 | 104408 |
