OWNER’S MANUAL
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 |
|
| tor cable |
|
|
| 4. | Ignitor cable pinched or wet | 4. | Free ignitor cable if pinched by any |
|
|
|
| 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 |
|
|
|
| control valve) |
| 7. | Piezo ignitor nut is loose | 7. | Tighten nut holding piezo ignitor. Nut |
|
|
|
| is located inside heater cabinet at top |
When ignitor button is pressed in, there is a spark at ODS/pilot but no ignition
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. Re- peat igniting operation until air is removed
4.Clean ODS/pilot (see Cleaning and Maintenance, page 14) or replace ODS/ pilot assembly
5.Replace gas regulator
6.Turn thermostat control knob to pilot position
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 |
|
|
|
| knob pressed in 30 seconds |
| 3. | Equipment shutoff valve not fully open | 3. | Fully open equipment shutoff valve |
| 4. | Thermocouple connection loose at con- | 4. | Hand tighten until snug, then tighten 1/4 |
|
| trol valve |
| turn more |
| 5. | Pilot flame not touching thermocouple, | 5. | A) Contact local natural gas company |
|
| which allows thermocouple to cool, |
|
|
|
| causing pilot flame to go out. This prob- |
| B) Clean ODS/pilot (see Cleaning and |
|
| lem could be caused by one or both of |
| Maintenance, page 14) or replace ODS/ |
|
| the following: |
| pilot assembly |
|
| A) Low gas pressure |
|
|
|
| B) Dirty or partially clogged ODS/pilot |
|
|
| 6. | Thermocouple damaged | 6. | Replace thermocouple |
| 7. | Control valve damaged | 7. | Replace control valve |
| 8. | Safety interlock system has been trig- | 8. | Wait one minute for safety interlock sys- |
|
| gered (thermostat models only) |
| tem to reset. Repeat ignition operation |
www.desatech.com | Continued |
|
104246 | 15 |
