®
INFRARED NATURAL GAS HEATER
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 heater and let cool before servicing. Only a qualified ser- vice 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.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
When ignitor button is pressed in, there is no | 1. | Ignitor electrode positioned wrong | 1. | Replace ignitor |
spark at ODS/pilot | 2. | Ignitor electrode broken | 2. | Replace ignitor |
| 3. | Ignitor electrode not connected to igni- | 3. | Reconnect ignitor cable |
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| tor cable |
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| 4. | Ignitor cable pinched or wet | 4. | Free ignitor cable if pinched by any |
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| metal or tubing. Keep ignitor cable dry |
| 5. | Broken ignitor cable | 5. | Replace ignitor cable |
| 6. | Bad piezo ignitor | 6. | Replace control valve (piezo is part of |
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| control valve) |
| 7. | Piezo ignitor nut is loose | 7. | Tighten nut holding piezo ignitor. Nut |
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| is located inside heater cabinet at top |
ODS/pilot lights but flame goes out when control knob is released
1.Gas supply turned off or equipment shutoff valve closed
2.Control knob not fully pressed in while pressing ignitor button
Thermostat control knob not fully pressed in while pressing ignitor button (thermostat models only)
3.Air in gas lines when installed
4.ODS/pilot is clogged
5.Gas regulator setting is not correct
6.Thermostat control knob not in pilot position
1.Turn on gas supply or open equipment shutoff valve
2.Fully press in control knob while press- ing ignitor button
Fully press in thermostat control knob while pressing ignitor button (thermo- stat models only)
3.Continue holding down control knob. Repeat igniting operation until air is re- moved
4.Clean ODS/pilot (see Cleaning and Maintenance, page 13 ) or replace ODS/ pilot assembly
5.Replace gas regulator
6.Turn thermostat control knob to pilot position
www.desatech.com
14 | 104820 |
