Design Dynamics PFS VF-18N-MHD Owner's Operation And Installation Manual

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Design Dynamics PFS VF-18N-MHD Owner's Operation And Installation Manual Manual pdf 21 page image

www.fmiproducts.com116986-01H 21TRoUBlesHooTINGWARNING: Turn off heater and let cool before servicing. Only aqualified service person should service and repair heater.CAUTION: Never use a wire, needle or similar object to cleanODS/pilot. This can damage ODS/pilot unit.Note: All troubleshooting items are listed in order of operation.POSSIBLE CAUSE1. Switch in OFF position (mod-ule gives long steady beep)2. Bad batteries (If batteriesfail within 1 heating season,see cause no. 8)3. Ignitor electrode not con-nected to ignitor cable4. Ignitor cable pinched orwet5. Broken ignitor cable6. Bad piezo ignitor7. Ignitor electrode positionedwrong or broken8. Bad module1. Gas supply turned off or equip-ment shutoff valve closed2. Bad batteries (If batteriesfail within 1 heating season,see cause no. 9)3. Control knob not in PILOTposition4. Control knob not pressed inwhile in PILOT position5. Air in gas lines when in-stalled6. Depleted gas supply (pro-pane/LP only)7. ODS/pilot is clogged8. Gas regulator setting is notcorrect9. Bad module1. Inlet gas pressure is toolow2. Wire disconnected from gascontrol3. Burner orifice(s) clogged4. Bad moduleOBSERVED PROBLEMWhen and arepressed at the same time,there is no spark at ODS/pilotWhen and arepressed, there is spark atODS/pilot but no ignitionBurner does not light afterpilot is litREMEDY1. Push switch on valve to "–"position2. Replace batteries3. Reconnect ignitor cable4. Free ignitor cable if pinchedby any metal or tubing.Keep ignitor cable dry5. Replace ignitor cable6. Replace piezo ignitor7. Replace pilot assembly8. Replace module1. Turn on gas supply or openequipment shutoff valve2. Replace batteries3. Turn control knob to PILOTposition4. Press in control knob whilein PILOT position5. Continue holding downcontrol knob. Repeat ignit-ing operation until air isremoved6. Contact local propane/LPgas company7. Clean ODS/pilot (see Clean-ing and Maintenance, page20) or replace ODS/pilotassembly8. Replace gas regulator9. Replace module1. Contact local natural orpropane/LP gas company2. Reconnect leads (see Wir-ing Diagram, page 24)3. Clean burner (see Cleaningand Maintenance, page 20)or replace burner orifice(s)4. Replace module