![Emerson Bettis G01XXXX-M11 series Скачать руководство пользователя страница 43](http://html.mh-extra.com/html/emerson/bettis-g01xxxx-m11-series/bettis-g01xxxx-m11-series_service-instructions-manual_102066043.webp)
Service Instructions
124843E Rev. C
August 2015
39
Section 7: Troubleshooting
Troubleshooting
Section 7: Troubleshooting
7�1
Fault Insertion
In the unlikely event of a fault developing, the following Fault Location Table is provided to
assist the service engineer to perform troubleshooting. This table is designed to cover as
wide a range of Emerson Bettis actuators as possible. Reference to equipment not sup-
plied should be ignored.
Table 16�
Fault Location Table
SYMPTOM
POTENTIAL CAUSES
REMEDY
Erratic movement
Irregular supply of operating
medium
Check operating medium for consistent sup-
ply pressure and correct as necessary
Inadequate lubrication
Dismantle, relubricate and reassemble
Worn parts
Dismantle. Visually inspect for
significant wear. Actuator
replacement may be required
Defective valve
Consult the valve OEM's documentation
Short stroke
Incorrectly set stops
(valve and /or actuator)
Check the position of the travel stops and
readjust as necessary
Hardened grease
Dismantle, remove any hard grease,
Relubricate and reassemble
Debris left in the cylinder or
housing during maintenance
Disassemble cylinder assembly to remove
debris. Reassemble cylinder assemble
as necessary
Defective valve
Consult the valve manufacturer's documentation
Apparent lack
of torque
Inadequate supply pressure
Ensure supply pressure is above the minimum
operating pressure of the actuator and that
output torque produced at supply pressure
exceeds valve torque demand
Incorrect speed control settings Adjust speed controls to increase flow
Exhaust port blocked
Remove and clean the exhaust port
silencers and replace
Pipe work blocked, crushed
or leaking
Examine the pipe work for blockages,
crushed pipe or leakage. Clear or replace
as necessary
Defective controls
Examine the controls, refurbish or renew
as necessary. Refer to component
manufacturer's documentation
Defective piston seal
Dismantle the cylinder assembly, remove
the defective piston seal. Fit new seal
and reassemble
Defective rod seal
Dismantle the cylinder assembly, remove
the defective rod seal. Fit new seal
and reassemble
Defective housing seal
Dismantle the housing assembly, remove the
defective seal. Fit new seal and reassemble
High valve torque or valve
seized
Consult the valve OEM documentation