Burkert 8681 - Malfunctions Analysis

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Maintenance, troubleshooting
23.3 Maintenance / service
When used properly, the control head Type 8681 operates maintenance and trouble-free.
Forservicework,contacttheBürkertSalesCenter(chapter“4.1”onpage14).
Iftheservice/maintenancenoticationfunctionisactive(seechapter“6.8Factorysettingsinthermware”),
amaintenancepromptisissued-thecorresponding"ashingpattern"dependsonthedesignofthecontrol
head Type 8681 - see chapter “21.2Flashingpattern&faultsignalling”onpage143.
23.4 Cleaning
NOTE!
Aggressivecleaningagentsmaydamagethematerial!
•In the potentially explosive atmosphere, only wipe the control head with a damp or anti-static cloth to
avoid electro-static charges.
•The customary cleaning agents and foam cleaners can be used to clean the outside. We recommend
checking that the cleaning agents are compatible with the housing materials and seals before using the
cleaning agent.
→ Clean the control head and rinse it thoroughly with clean water to safeguard against the formation of
deposits in grooves and recesses.
Ifcleaningagentisnotrinsedoproperly,itsconcentrationmayconsiderablyexceedthecon-
centrationforusewhenthewaterhasevaporated.Thechemicaleectwillthusbeseveraltimes
stronger!
Observethespecicationsofthemanufacturerandtherecommendationsforuseofthecleaning
agent manufacturer!
23.5 Malfunctions
In the event of any malfunctions in spite of a correct installation, proceed according to the fault analysis
described in the table below:
Fault description Possible cause of the fault Troubleshooting
No feedback signal
Position of the position measuring
system(Teach)notappropriate
forthespindleposition(“7.2.1”,
“7.2.2”)
Perform / repeat the Teach procedure
(seechapter“20.1 Setting the position
measuringsystem(Teachprocedure)”)
Setting of the external initiators
incorrect
Set the external initiator according to
the respective operating instructions.
No or faulty associated feedback
signals or external initiator
Set the connections according to the
pinandplugcongurationsdescribed
intheseoperatinginstructions(forthe
respective voltage and communication
variant).
Target is not mounted on the
process valve's spindle or target
faulty
Check the target for correct mounting
andcondition(seechapter“6.7
Positionmeasuringsystemdata”.
english
Control Head Type 8681