Baxi ECOGEN 24/1.0 Installation & Servicing Instructions

Errors20,40,257theseerrorsrelatetosensorsensorsmeasuringtheflow,returnandambientconditionsoftheappliance.Thethermistorsshouldmeasure10kOhmsat25deg.
C.Checkforeitheropenorshortcircuit;acceptancelimitsare32kohms(0deg.C)and230ohms(140degC).Thesecomponentsconnectbacktothe24way'milligrid'*
connectorontheMCB.
Error127Legionellatemperature.TheLegionellatemperature65degChasnotbeenachievedwithinthelast48hours.Thisisadvisoryonlytheappliancewillcontinueto
operatenormally.IfalargeDHWdemandcoincideswiththeLegionellaperioditcouldstopthecylindertemperaturefromreaching65degC.Anyhourlongperiodatthis
temperaturewillremovetheerrorcodewhetherduringaLegionellaperiodornot.
Error157theoverheatthermostatisnormallyclosed;theopeningtemperatureis98+3degC.Thisisauserreseterrorbutifnoresetispossibleapermanentopencircuitis
impliedcheckforthisconditionfromtheconnectionsontheBurnercontrolunits(BCUs).
Error258thiserrorimpliesanambientsensorhasoverheatedinsidetheappliance,themostlikelycauseisafaultysealbetweentheengineandtheengineburner.Checkthe
integrityofthesealandthethermalinsulationaroundboththeengineburnerandthesupplementaryheatexchanger.Checkthatthesensorisheldinthecorrectpositionseefig
2.
Error259thiserrorimpliesasensoronthemainPCBhasoverheated;auserresetshouldclearthefaultoncetheboardhascooled.Iftheproblemreoccursintheabsenceof
otherassociatederrorstheboardshouldbereplaced.
Error301EngineHeadhasoverheatedifproblempersistscallforservice.
Error302,303,304,396,397,398and399,theseerrorsrelatetothethermocouplesusedtomonitortheheadtemperatureoftheStirlingengine.Checkforcontinuityatthe
connectormountedonenginesupportbracketseeFig.AAandthemilligrid*connectiontotheboard.Iftheconnectionsaregoodandathermocoupleisfoundtobeopencircuit
replacethethermocouple.
AUserresetcanonlybemadewhenthefaultisrectified.
*Note:Continuityfromthemilligridconnectormaybecheckedbycarefullyremovingtheconnectorandinsertingafinewire(asmallresistorlegisideal)intothecorresponding
connectionseesection16.2.
SectionD
Errors114and158,theseerrorsareassociatedwithloopedconnectionsonthe6wayconnectorsontheBCUstestforcontinuityintheloops,themainPCBwillhavetobe
replacediftheproblempersists.
Fig.AA
page83
SectionELossofflameorcondensatedrainblocked
Performauserresetiftheappliancewillnotrelight,inspectthecondensatetrapforsignsofblockage.Ifthetrapisfullremovethebottomconnectiontoseeifthewaterdrains.
Rectifythetrap/pipeworkasnecessary.
Iftheproblemdoesnotappeartoberelatedtothecondensetrapfollowtheprocedurebelow:
Checkthatthegassupplyisatthecorrectsupplypressurei.e.2025mbar,atthegasvalvepressuretestpointandthatthegashasbeenpurgedthrough.
EnsurethatalljointsinthegastrainaresoundthatthesiliconairsensetubesareconnectedfromtheventuristothecorrectgasvalvesensingportseeFig72andSection
14.17.Alsoifthesupplementaryheatexchangerhasbeenreplaced/removedcheckthattheclampingcollarisgastight.SeeFig.67.
Checkalltheelectricalconnections:gasvalves,ignitersandflamesenseforsoundnessand'cross'connections.(Thewiringharnessandcomponentshavebeendesignedto
limitthepossibilityofinterconnectingtheengineandsupplementaryignitioncircuits,ensureallconnectionsaremadebeforestartinganyfaultfinding.)
Repeated425error,checkandcleanairstraightenersasinSection14.6.
Doauserresetandcheckduringtheignitioncyclefor:
NOTE:BCUreferstoeitherofthetwoburnercontrolunitsmountedonthemainPCB(MCB)

Baxi ECOGEN 24/1.0 Specifications

General

Brand	Baxi
Model	ECOGEN 24/1.0
Category	Boiler
Language	English