Burkert Type 8681 User Manual
Page 80
80
Maintenance, Troubleshooting
fault description
possible cause of the fault
troubleshooting
Feedback signal is lost in
system operation
Position in the limit range of the
feedback area
Repeat the Teach-In process
(see chapter
Measuring System (Teach-In))
Check the process valve end positions
during operation against the end posi-
tions in non-operative state of the system.
Check the compressed air supply.
Valve output 2/A1 cannot be
switched off with the control
Magnetic manual control is still
activated
Deactivate the manual control -
see chapter "
Valve outputs cannot be
switched off by the control
Mechanical manual control at the
solenoid valve is still activated
Deactivate the manual controls at the
solenoid valves -
see chapter "
Faults are signaled by means
of LEDs
Possible causes may vary
depending on the version
Please read the corresponding descrip-
tions of the respective communication
variant in these operating instructions.
No or faulty function of the
process valves
No electrical power supply or com-
munication for the control head
Check the power supply and the com-
munication settings (also refer to detailed
descriptions of the respective versions in
these operating instructions)
No or insufficient pneumatic supply
of the control head
Check the compressed air supply and
ensure that supply is sufficient
Incorrect function of the
process valves
Confused pneumatic connection
lines
Check the correct pneumatic connection
of the control head to the process valve
(for Fluid Diagram, see chapter
"
5.4.2. Fluid diagram" and the operating
instructions of the corresponding process
valves)
Valves not correctly connected on
electronics module
Check the correct electrical connection
of the solenoid valves -
see
In the event of any undefined faults, be sure to contact the service department of Bürkert.
english
Control Head Type 8681