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6 Troubleshooting List
Fault No. Possible Cause Measures
Actuator
spindle not
moving
1.1
1.2
1.3
1.4
1.5
• Manual control not in zero
position.
• Compressed air not connected
to actuator.
• Diaphragm is torn.
• Valve cone seized.
• Design actuator power is too
weak for the valve.
• Bring the manual control into the zero
position (see Chapter 5.1)
• Check compressed air system.
• Change diaphragm.
• See Valve Troubleshooting List.
• Check design and consult the manufacturer
of the whole valve.
Movement of
actuator
spindle jerky
2.1
2.2
2.3
• Too little compressed air.
• Position control system set
incorrectly.
• Valve cone seized slightly due
to dirt particles.
• Check compressed air system for damage
and sufficient throughput.
• Correct the settings (see Operating
Instructions for position control system).
• See Valve Troubleshooting List.
High air
consumption
3.1
3.2
3.3
• Diaphragm not compressed
correctly.
• Seal components worn.
• Leaky pipes to actuator.
• Tighten hexagonal nuts (21) until the
diaphragm is compressed.
• Change seal components (10 & 11, plus 3 if
necessary).
• Check pipes for leaks and change or seal as
necessary.
If the remedies stated above lead nowhere contact the supplier / manufacturer.
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