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 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.
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY |
When ignitor button is pressed, there is no spark at ODS/pilot
1.Ignitor cable pinched or wet
2.Ignitor electrode not connected to igni- tor cable
3.Piezo ignitor nut is loose
4.Broken ignitor cable
5.Ignitor electrode broken
6.Bad piezo ignitor
7.Ignitor electrode positioned wrong
1.Free ignitor cable if pinched by any metal or tubing. Keep ignitor cable dry
2.Reconnect ignitor cable
3.Tighten nut holding piezo ignitor to heater cabinet. Nut is located inside heater cabinet at top
4.Replace ignitor cable
5.Replace ignitor
6.Replace piezo ignitor
7.Replace ignitor
When ignitor button is pressed, there is spark at ODS/pilot but no ignition
1.Gas supply turned off or equipment shutoff valve closed
2.Control knob not in PILOT position
3.Control knob not pressed in while in PILOT position
4.Air in gas lines when installed
5.ODS/pilot is clogged
6.Gas regulator setting is not correct
1.Turn on gas supply or open equipment shutoff valve
2.Turn control knob to PILOT position
3.Press in control knob while in PILOT position
4.Continue holding down control knob. Repeat igniting operation until air is re- moved
5.Clean ODS/pilot (see Cleaning and Maintenance, page 12) or replace ODS/ pilot assembly
6.Replace gas regulator
ODS/pilot lights but flame goes out when control knob is released
1.Control knob not fully pressed in
2.Control knob not pressed in long enough
3.Safety interlock system has been triggered
4.Equipment shutoff valve not fully open
5.Thermocouple connection loose at con- trol valve
6.Pilot flame not touching thermocouple, which allows thermocouple to cool, causing pilot flame to go out. This prob- lem could be caused by one or both of the following:
A)Low gas pressure
B)Dirty or partially clogged ODS/pilot
7.Thermocouple damaged
8.Control valve damaged
1.Press in control knob fully
2.After ODS/pilot lights, keep control knob pressed in 30 seconds
3.Wait one minute for safety interlock sys- tem to reset. Repeat ignition operation
4.Fully open equipment shutoff valve
5.Hand tighten until snug, then tighten 1/4 turn more
6.A) Contact local natural gas company
B) Clean ODS/pilot (see Cleaning and Maintenance, page 12) or replace ODS/ pilot assembly
7.Replace thermocouple
8.Replace control valve
www.desatech.com | Continued |
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