Technical data

24
 Troubleshooting4
Fault code
Display
Fault description Comments
• Remedial action
015
Operatinglock-out Thefaultcode015isdisplayed,iftheheaterwasswitchedbackonafterthe
faultcodedisplay017.
Thehardwarethresholdvaluefortheoverheatingsensorhasbeenexceeded
—>thecontrolboxislocked.
• Replacecontrolbox.
017
Overheating Thehardwarethresholdvaluefortheoverheatingsensorhasbeenexceeded,
becausethecontrolboxfailedtorecognisethefaultcode012or013–>the
controlboxislocked.
Iftheheaterisswitchedonagain,thefaultcode015isdisplayed.
• Replacecontrolbox.
018
Startingenergyoftheglowplugis
toolow
(Displayonlyifheaterslabelled“H-Kit”
onthenameplate.)
• Checkglowplug(seefaultcode020and021),ifok
• Checkglowplugcableharnessforcorrectlayinganddamage,ifok—>
checkcableharnessforcontinuity,ifok—>replacecontrolbox.
019
Ignitionenergytoolow • Checkglowplug(seefaultcode020and021),ifok
• Checkglowplugcableharnessforcorrectlayinganddamage,ifok—>
checkcableharnessforcontinuity,ifok—>replacecontrolbox.
020
021
Glowplug–interruption
Glowplug–shortcircuit,overloador
shortcircuitafternegative
• Checkglowplugforfunctionandcontinuityatambienttemperature20°C.
 12voltheater–0.42upto±0.7
 24voltheater–1.2upto±2.0
• Ifthevaluesareok—>checkglowplugleadharnessfordamageandcon-
tinuity,ifok—>replacecontrolbox.
022
*
Glowplug,output(+)–shortcircuit
afterU
B
(batteryvoltage)
• Checkglowplugleadharnessforcorrectlayinganddamage,ifok—>
checkleadharnessforcontinuity,ifok—>replacecontrolbox.
025
*
Diagnosticscablebl/ws–shortcircuit
–afterU
B
(batteryvoltage)
Faultcodedisplayisnotpossible.Thisfaultcodecannotbereadoutfromthe
faultmemoryuntilthefaulthasbeencorrected.
• Checkdiagnosticscableforcorrectlayingandpossibledamage.
031
Blower–interruption • Checkthattheleadharnessoftheblowermotorhasbeencorrectlylaid
andcheckfordamage,ifok—>removeleadharnessatcontrolboxand
checkforcontinuity,ifok—>replacecontrolbox.
032
Blowermotor–shortcircuitafter
negative
Please note!
Ensurecompliancewiththetestvolt-
age(seepage12).Thecomponent
isdestroyedifthevoltagevalueis
exceeded.
Ensure the power pack has ad-
equate short-circuit resistance
– min 20 A.
• Carryoutfunctionaltestontheblowermotor,todothisremovethecon-
nectorfromthecontrolbox.Applyatestvoltage(seepage12)totheblow-
ermotorandmeasurethecurrentintensityafter40sec.
 Currentintensity<6.5A–blowermotorok–>replacecontrolbox.
 Currentintensity>6.5A—>replaceblower.
• Checkwiringforshortcircuit.
033
Blowermotorwon’trotateorshort
circuitafternegative
Please note!
Ensurecompliancewiththetestvolt-
age(seepage12).Thecomponent
isdestroyedifthevoltagevalueis
exceeded.
Ensure the power pack has ad-
equate short-circuit resistance
– min 20 A.
Speeddeviation>10%fromsetpointvalueforlongerthan30seconds.
Useanon-contactr.p.m.countertomeasurethespeedofthecombustionair
fan(seepage12fortestspeedandtestvoltage).
• Speedtoolow:
 Blowerblocks–checkblowerforfreerunning,ifnecessaryremoveforeign
body,ifok—>checkblower(seefaultcode032).
• Speedtoohigh:
 – Magnetmissingfromblowerimpeller—>replaceblower.
 – Speedsensorincontrolboxisdefective—>replacecontrolbox.
• Checkwiringforshortcircuit.
* Thisfaultcodeorohmicvalueisvalidforanewgenerationcontrolboxonly.Thisdiffersfromthecontrolboxtodatebyitscableloomwrappedincabletapeandbya
temperaturesensormountedontheside,whichbecomesvisiblewhenthecoverisremoved.