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14
mainTenance, TrOuBleshOOTing
Warning
risk of injury due to incorrect maintenance work.
Maintenance may be carried out by authorised technicians only and with the appropriate tools!
►
risk of injury due to unintentional switching on of the plant and uncontrolled start-up.
Secure system against unintentional activation.
►
Ensure controlled start-up after maintenance.
►
14.1
Troubleshooting
Fault
Valves do not switch
38
possible cause
No or insufficient load voltage
Manual override of the valves not in
the neutral position
Pressure supply insufficient or not
available
Incorrect design
Channel not released for operation
english
Type 8653
Maintenance, troubleshooting
remedy
Check electrical connection
Ensure correct load voltage
Move the manual override to the neutral
position
Ensure a sufficient pressure supply
(also for upstream devices such as
pressure controllers, maintenance units,
shut-off valves, etc.)
At valves without auxiliary pilot air:
Guarantee minimum operating
pressure of 3.0 bar and observe
the ratio of pilot pressure to medium
pressure in accordance with
the pilot pressure diagram
(see chapter "6.4.2" on page 15)
Design the system according to the
hardware design
Change the parameter setting
(Bürkert Communicator)
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