EB AT-RP-4GU EN 8-1
Malfunctions
8 Malfunctions
The work described in this section is only to be performed by fully trained and qualified personnel.
8.1 Troubleshooting
Malfunction Possible reasons Reccomended action
Uneven rotation
Inadeguate supply Check the supply system and make sure that the supply pressure is correct.
Missing lubricant
Disassemble the actuator, lubricate all the sliding parts and reassemble the
actuator.
Worn components
Disassemble the actuator, inspect and replace the worn/damaged compo-
nents.
Control system
Make sure the control system components are correctly assembled. Check
the control system documentation and contact the manufacturer.
Faulty valve
In case of actuator mounted over the valve, check the valve documentation
and contact the manufacturer.
Incomplete rotation
Incorrect stroke adjustment Follow the indications in section 9.5.6 for correct stroke adjustment.
Foreign object left inside Disassemble the actuator, inspect and remove any foreign object.
Incorrect assembly after maintenance Disasseble and reassemble the actuator correctly.
Control system
Make sure the control system components are correctly assembled. Check
the control system documentation and contact the manufacturer.
Faulty valve
In case of actuator mounted over the valve, check the valve documentation
and contact the manufacturer.
Loss of power
Inadeguate supply pressure Check the control system and make sure that the supply pressure is correct.
Supply pipe blocked, compressed or with
sealing problems
Check all the tubing and fittings, remove any foreign object/damaged
component.
Actuator seals leakage Disassemble the actuator, inspect and replace any damaged seals.
blocked air exhaust hole Remove plugs or foreign objects from the exhaust hole.
Faulty valve
In case of actuator mounted over the valve, check the valve documentation
and contact the manufacturer.
8.2 Emergency action
The plant operator is responsible for emergency action to be taken in the plant.
Note
Contact AIR TORQUE after-sales service (JOGP@airtorque.EF) for malfunctions not listed in the table.
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