Technical data

23
 Troubleshooting4
Fault code
Display
Fault description Comments
• Remedial action
000
Nofaults ——
004
Warning:
Shortcircuitincontrolbox,
freshairoutput
• DisconnectconnectorS1/B1attheheaterandattheconnectorB1,PIN
16checkthecableuptothefreshairfanrelayforshortcircuittonegative,
ifok—>replacecontrolbox.
005
Warning:
Shortcircuitincontrolbox,
caralarmoutput
• DisconnectconnectorS1/B1attheheaterandattheconnectorB1,PIN
15checkthecableuptotherelayisolatingswitchorburglaralarmsystem
inputforshortcircuittonegative,ifok—>replacecontrolbox.
006
Warning:
Inexplicableatmosphericaltitude
information
(Displayonlyifheaterslabelled“H-Kit”
onthenameplate.)
Controlboxhasnotreceivedanyexplicablealtitudeinformation.
• ReadoutfaultmemoryintheairpressuresensorusingtheEDiTHdiagnos-
ticstoolandcorrectfault.
009
Cut-offADR ADRshutdownduetosignalchangefrom(+)to(–)atconnectorS1,PIN13
(D+)orplussignalatconnectorS1,PIN14(HA+).
010
Overvoltage–cut-off Overvoltageappliedtocontrolboxforatleast20secondswithoutinterruption
–heaternotworking.
• DisconnectconnectorS1/B1attheheater,startthevehicle’sengine,
measurethevoltageatconnectorB1betweenPIN1(cable2.5
2
rt)andPIN
10(cable2.5
2
br).
 Airtronic12volt–voltage>16volt—>checkgeneratorregulator 
Airtronic24volt–voltage>32volt—>checkgeneratorregulator
011
Undervoltage–cut-off Undervoltageappliedtocontrolboxforatleast20secondswithoutinterrup-
tion–heaternotworking.
• DisconnectconnectorS1/B1attheheater,thevehicle’sengineisswitched
off,measurethevoltageatconnectorB1betweenPIN1(cable2.5
2
rt)and
PIN10(cable2.5
2
br).
 Themeasuredvalueandthevoltageatthebatteryshouldbethesame.
 Incaseofavoltagedrop,checkthefuses,thesupplycables,thenegative
connectionsandthepositivesupportpointonthebatteryforcorrosionand
correctcontact.
012
Overheatingattheoverheatingsensor Temperatureoftheoverheatingsensortoohigh.
• Checkhotairpipesforblockage—>removeblockage.
• Sumofthecomponentratingsofair-conductingpartsistoolarge—>
Checkairsystem,ifnecessaryre-lay–forcomponentratings,pleaserefer
toadditionalpartscatalogue.
• Checkoverheatingsensor,fordiagramandtableofvaluespleasereferto
Page32,ifok—>measurefuelquantity,seePage36.
013
Overheatingattheflamesensor Flamesensorsignalstemperatureatheatexchangeristoohigh.
• Checkhotairpipesforblockage—>removeblockage.
• Sumofthecomponentratingsofair-conductingpartsistoolarge—>
Checkairsystem,ifnecessaryre-lay–forcomponentratings,pleaserefer
toadditionalpartscatalogue.
• Checkflamesensor,ifok—>checkoverheatingsensor,ifoverheating
sensordefective—>replacecombinationsensor,ifoverheatingsensorok
—>measurefuelquantity,seePage36,fordiagramandtableofvaluesfor
flamesensorandoverheatingsensorpleaserefertoPage32.
014
Temperaturedifferencebetween
flamesensorandoverheatingsensor
toolarge
Temperaturedifferencebetweenflamesensorandoverheatingsensortoo
large
• Checkhotairpipesforblockage—>removeblockage.
• Sumofthecomponentratingsofair-conductingpartsistoolarge—>
Checkairsystem,ifnecessaryre-lay–forcomponentratings,pleaserefer
toadditionalpartscatalogue.
• Checkflamesensor,ifok—>checkoverheatingsensor,ifoverheatingsen-
sordefective—>replacecombinationsensor,ifoverheatingsensorok—>
measurefuelquantity,seePage36,iffuelquantityok—>replacecontrol
box.Fordiagramandtableofvaluesforflamesensorandoverheatingsen-
sor,seePage32.