Vanguard VMH3000TPSA Owner's Operation And Installation Manual

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Vanguard VMH3000TPSA Owner's Operation And Installation Manual Manual pdf 16 page image

16107102PROPANE/LP GAS RESIDENTIAL HEATERS®For more information, visit www.desatech.comTROUBLESHOOTING WARNING: Turn off and un-plug heater and let cool beforeservicing. Only a qualified ser-vice person should service andrepair heater.REMEDY1. Replace ignitor2. Replace ignitor3. Reconnect ignitor cable4. Free ignitor cable if pinched by anymetal or tubing. Keep ignitor cable dry5. Tighten nut holding piezo ignitor toheater cabinet. Nut is located insideheater cabinet at top6. Replace ignitor cable7. Replace piezo ignitor1. Turn on gas supply or open equipmentshutoff valve2. Turn control knob to PILOT position3. Press in control knob while inPILOT position4. Continue holding down control knob. Re-peat igniting operation until air is removed5. Contact local propane/LP gas company6. Clean ODS/pilot (see Cleaning andMaintenance, page 19) or replace ODS/pilot assembly7. Replace gas regulator1. Press in control knob fully2. After ODS/pilot lights, keep controlknob pressed in 30 seconds3. Wait one minute for safety interlock sys-tem to reset. Repeat ignition operation4. Fully open equipment shutoff valve5. Hand tighten until snug, then tighten1/4 turn more6. A) Contact local propane/LP companyB) Clean ODS/pilot (see Cleaning andMaintenance, page 19) or replace ODS/pilot assembly7. Replace thermocouple8. Replace control valvePOSSIBLE CAUSE1. Ignitor electrode positioned wrong2. Ignitor electrode broken3. Ignitor electrode not connected toignitor cable4. Ignitor cable pinched or wet5. Piezo ignitor nut is loose6. Broken ignitor cable7. Bad piezo ignitor1. Gas supply turned off or equipmentshutoff valve closed2. Control knob not in PILOT position3. Control knob not pressed in while inPILOT position4. Air in gas lines when installed5. Depleted gas supply6. ODS/pilot is clogged7. Gas regulator setting is not correct1. Control knob not fully pressed in2. Control knob not pressed in long enough3. Safety interlock system has beentriggered4. Equipment shutoff valve not fully open5. Thermocouple connection loose atcontrol valve6. 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 ofthe following:A) Low gas pressureB) Dirty or partially clogged ODS/pilot7. Thermocouple damaged8. Control valve damagedOBSERVED PROBLEMWhen ignitor button is pressed, there is nospark at ODS/pilotWhen ignitor button is pressed, there isspark at ODS/pilot but no ignitionODS/pilot lights but flame goes out whencontrol knob is releasedCAUTION: Never use a wire,needle, or similar object to cleanODS/pilot. This can damage ODS/pilot unit.Note: For additional help, visit DESAInternational’s technical service web siteat www.desatech.com.Note: All troubleshooting items are listed inorder of operation.www.desatech.com