Baxi ECOGEN 24/1.0 Installation & Servicing Instructions

page84
SectionFBurnercontrolandpowermonitoring
Errorcodes263,264,394,395,422and423areduetocommunicationproblemsbetweenthemainboardandtheburnercontrolunits.Iftheerrordoesnotautoresetpower
down,iftheerrorpersistsreplacethePCB.
Errorcodes253,254,265,309,310and311areconcernedwithgridconnectionandpowermonitoringandwillrequireanewPCBiftheerrorpersists.
SectionGFancalibrationandspeed
Checkelectricalconnectionstothefanandbacktothe14wayconnectoronthemainPCB.Error267,autoresetpowerdown,ifproblempersistsreplacethefan.Error266,
performaservicereset.Iftheproblempersistsreplacethefan.
SectionHSpoolvalvecalibration
Checkelectricalconnectionstothespoolvalvemotorandbacktothe14wayconnectoronthemainPCB.
Performaservicereset.Iftheproblempersistsdownpowerfirstthenservicereset.Iftheproblempersistsreleasethemotorfromitsmountingbyundoingthe3screwsand
checktoseeiftheerrorwillreset.Ifthemotorrunsfreeofthespoolvalvethespoolvalvemaybejammed,ifthereisnomovementreplacethespoolvalve.
SectionIWaterflow
Error400:Reverseflowconditions,thereturntemperaturehasbeenlessthantheboilerflowfor3minutes.Checkthepumpflowdirection.
OninitialcommissioningoftheappliancecheckthattheflowandreturnpipestothesystemareasinFig.2andsection9.3Serviceconnections.
Error164showsthattheminimumflowrateof4l/minhasnotbeenachievedafter12seconds,ifafterafurther4minutestheflowswitchhasstillnotbeenclosederror274will
bedisplayed.Aserror164isanautoresetifatanytimewithinthe4minutestheflowswitchisclosedtheapplianceoperationwillberestored.Themostlikelyreasonforthis
errorisairinthesystem,itisthereforeimportanttopurgethesystemthoroughly.Apermanent164errorindicatesthattheswitchisstuckopen.
IfthereturntemperaturesensorhasnotbeenconnectedseeFigs.48Ensurethe3transitbracketshavebeenremoved.
Ifthepumpisnotrunning,checkfor230vatPumpLiveCheckFuseSection16.6.
Error428showsthattheflowsensorhasnotdetected7L/min,theengineburnerwillbepreventedfromrunningandtheappliancewillcontinuetorunonthesupplementary
only.Checkthattheautomaticbypasshasbeensetupcorrectly.
Error270,278and421arecausedbyeitherarapidriseintemperatureorexcessivetemperaturedifferentialacrosstheheatexchanger;eitherverylowflowcloseto4L/minor
airinthesystemisindicated.CheckthewiringbacktothemainPCB.IneithercaseCheckthepump/speedsettingandthatanyisolationvalvesareopen;ensurethesystemis
purgedofairandthatthereisanadequatebypass.
SectionJ
Error284thewatercooledsealthermostathasoperatedaconditionthatindicatesthattheflexiblesealconnectingtheenginetotheengineburnerisdamageorisnotin
place.Ifthisnotthecasecheckthewiringforcontinuitybacktothe24way'milligrid'connectorviathe6wayMolexconnectionseepages48and50.Ifanopencircuitpersists
backtoeitherofthethermostatstheyshouldbereplaced.
SectionK
Errors286and289indicatethattheenginehasoverheated.Theenginewilltakesometimetocooldownsoperformingaserviceresetmaynotbesuccessfulstraightawayuse
oneofthethermocouplesmountednexttotheflowswitchtoascertainthestirlingheadtemperature.Iftheengineappearsnottohaveoverheatedortheerrorwillnotresetcheck
theenginethermostatcircuitsthroughthe6wayMolexconnection.SeealsoSectionO.
SectionL

Baxi ECOGEN 24/1.0 Specifications

General

Brand	Baxi
Model	ECOGEN 24/1.0
Category	Boiler
Language	English