Type AIPB
600 073 044 DEBC 08 / 01 VI.CA.Z1.5V 11
ENGLISH
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Fault Possible cause Remedy
Set max. flow rate Air in the actuator 1. Loosen impulse tube connection on the actuator by approx. 1 turn.
is inconsistent. 2. Ventilate (move impulse tube until medium escapes).
3. Re-tighten impulse tube connections.
Set flow rate Impulse tube or their connections 1. Dismount impulse tube.
is exceeded. are dirty or blocked. 2. Check and clean impulse tube connections on pipeline and on actuator with orifice plate Ø 1.
Valve does not close: 1. Remove impulse tubes.
Valve seat or cone unit is dirty or damaged. 2. Loosen union nut SW 36 and remove actuator.
3. Unscrew cone unit.
4. Clean seat and cone.
5. In case of damage, replace cone unit or valve.
Diaphragm is defective. 1. Loosen union nut SW 36 and remove actuator.
2. Replace actuator.
Flow rate too low Limitation by output control Check the control function.
Differential pressure is too low Check system.
Valve does not open: 1. Remove impulse tubes.
Valve seat or cone unit is dirty or damaged. 2. Loosen union nut SW 36 and remove actuator.
3. Unscrew and clean cone unit.
4. In case of damage, replace cone unit.
Controller does not Air in the actuator 1. Loosen impulse tube connections on the actuator by approx. 1 turn.
keep the differential 2. Ventilate (move impulse tube until medium penetrates).
pressure on a constant 3. Re-tighten impulse tube connections.
level.
Impulse tube or their connections 1. Dismount impulse tube.
are dirty or blocked. 2. Check and clean impulse tube connections on pipeline and on actuator with orifice plate Ø 1.
Differential pressure Valve does not close: 1. Remove impulse tubes.
too high Valve seat or cone unit is dirty or damaged. 2. Loosen union nut SW 36 and remove actuator.
3. Unscrew cone unit.
4. Clean seat and cone.
5. In case of damage, replace trim or valve.
Diaphragm is defective. 1. Loosen union nut SW 36 and remove actuator.
2. REplace actuator.
Differential pressure Valve does not open: 1. Remove impulse tubes.
too low Cone is dirty or damaged. 2. Loosen union nut SW 36 and remove actuator.
3. Clean seat and cone.
4. In case of damage, replace cone unit.
The differential pressure in the system
is lower than the setpoint set on the Check system.
differential pressure controller.