VABF-S4-1-V2B1...
Festo – VABF-S4-1-V2B1... – 1705c English
27
10
Fault clearance
Note
The required vacuum may not be generated if there is an insufficient supply of air to the
valve terminal.
Malfunction
Possible cause
Remedy
Workpiece does not
release from the
suction cup
A vacuum has built up when lifting
large suction cups quickly
–
Increase the duration and intens
ity of the ejector pulse
–
Lift the suction cup more slowly
from the workpiece
–
Actively set the ejector pulse
when lifting the suction cup
The hose used between the suction
cup and vacuum block is sized
incorrectly (hose is too long and/or
internal diameter is too small)
Replace the hose
Hose requirements
è
Chapter 4.2
Flow control screw is closed
Open the flow control screw
No display
Supply voltage not applied or
permitted operating voltage not
present
Switch on supply voltage/maintain
permitted operating voltage range
Electrical connections swapped
(incorrect polarity)
Wire in accordance with the circuit
diagram
Device defective
Replace the device
Incomplete display
Display defective
Replace the device
Outputs do not
switch according to
settings
Short circuit or overload at
corresponding output
Eliminate short circuit/overload
Device defective
Replace the device
Settings cannot be
edited (“Lock” in the
display)
Access protection active
Enter the security code (if the
security code has been lost, reset the
device to the factory settings
è
Chapter 7.3 )
