11
Alarms
11.1
Malfunctions and remedies
In the event of malfunctions immediately deactivate the valve and secure it
against inadvertent reactivation. Malfunctions may only be remedied by qualified
staff, who must observe the safety instructions.
Malfunction
Cause
Remedy
Valve does not work
Fault in the control system
Check the system
configuration
No compressed air or
compressed air too low
Check compressed air supply
and check air hoses for free
passage and air tightness
Fault in the electrical system
Check actuation / external
controller and routing of
electrical lines
Valve disk blocked
mechanically
Clear the blockage
Stroke scanning lever has
shifted
Readjust the stroke scanning
lever
Actuator not working correctly
as a result of the control air
being soiled
Check the control air quality
Replace the positioner
Diaphragm defective
Replace the diaphragm
Valve does not close
Dirt/foreign materials in the
valve housing
Clean valve housing and valve
seat
Valve stroke too short as air
pressure too low
Check the compressed air
supply
Leakage at the housings
O-ring/V-ring defective
Disassemble the valve
housing. Replace the seals
Alarms
Malfunctions and remedies
430BAL011074EN_5
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08.11.2021
