Webasto AT2000STC - Preventive Maintenance Guidelines; Fault Code Diagnosis Basics; Identifying Flash Fault Codes

WebastoAirTopInstallationGuide–AT2000STC
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AirTop2000STCInstallationGuide2020|WebastoThermo&ComfortAustraliaPtyLtd.
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11PreventiveMaintenance
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Toensuretrouble‐freeoperationofyourWebastoheater, pleaseobservethefollowing:
1) Operateheaterforatleastanhouronceamonth,regardlessoftheseason
2) Keepreturnairinletandhotairoutletfreeofobstructionstopreventoverheating
3) Keepcombustionairinletandexhaustoutlet
tubefreeofdirtandobstructions
4) Changefuelfilterannually(dependingontheusage)
5) BioDieseloranyfueladditiveisnotpermitted
6) 15Afuseforboth12Vand24Vheaters
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Note:Thebuild‐upofCarbonisnotawarrantablecondition. 
SituationsthatmaycauseCarbon
build‐upintheheaterare:
 UnderVoltage:thesystemshouldhaveatleast12.5‐13V;
 Lowcurrent:thesystemrequires7‐8Afortheinitialstart‐upphasefor120secondsandoncetheflameis
establishedtheglowpluggoesoutandheatercontinuesrunningat2‐3A;
 Undersizewire:whereextensionsaremadetothebatterypositive&negativecablesonl y ,ensurethatcorrect
wiresizeisused;
 Fuelsystem:poorfuelqua lity,airpocketsinthefuellineorrunningoutoffuel;
 Combustionsystem:anyblockageorrestrictioninthecombustionairtubeoratthesilencer;
 Exhaustsystem:anyblockageorrestrictionintheexhaustmufflerorpipe;
 Isolationswitchorcircuitbreaker:canpreventtheheaterfromperformingacorrectshutdowncyc le.The
batterypositive&negativewireshouldbeconnecteddirectlytothebattery;
 Electricalconnections:poorbatteryconnections,poorEarth,loosefusesandimpropercrimpingofterminals
orplugs.
Thebuild‐upofCarbonisnotaproductmalfunctionhowever;theabovelistedareexternalfactorsthatcould
affecttheperformanceoftheheater.
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12FaultCode
Intheeventofafailure,aflashcodewillbegeneratedontheindicatorlightoftheRotaryControl(On/Off)switch.In
ordertomakeacorrectanalysis,itisnecessarytounderstandthefaultcode.Theflashingcodewillbevisibleduring
thecooldownperiodoftheoperation.
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Duringtheflashcodeeventyouwillseefivequickflashesfollowedbyasequenceofslowflashes,thesequenceof
slowflashesistheactualfaultcode.Thefivequickflashesareonlyanindicationthatafaulthasoccurred.
Countonlytheslowsequenceoftheflashesto
obtainthecurrentfaultcode.
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
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E.g.CodeF03=loworhighbatteryvoltage
Pause
Pause
F03 =
Quick flashes x5
Quick flashes x5
Number of slow flashes