April 2022
Installation, Operation and Maintenance Manual
E-90090007 Rev. 0
33
Section 9: Testing and Troubleshooting
Testing and Troubleshooting
Section 9: Testing and Troubleshooting
9.1
Testing
System operation and performance should be tested and noted regularly to detect
the problem in early stage. Use the following section to trace the source of problems
before proceeding to a major operator overhaul (the operator itself is generally the least
likely component to malfunction and requires the most time and effort to service).
9.2
Troubleshooting
NOTE:
This section focuses mainly on the most common problems and possible solutions of an
operator. The control and control component troubleshooting is not part of the scope.
In general, unsatisfactory operation of the operator is usually due to insufficient supply
caused by leakage. Please contact the manufacturer for more detailed information
regarding your requirements.
1.
NO MOVEMENT, SLOW, JERKY OR PARTIAL STROKE
—
Check for sufficient supply pressure and flow.
—
Check to ensure that speed control valve and shutoff valve are not
fully closed.
—
Check for change in operating conditions, that is, higher line pressure,
different fluid, valve packing tightened excessively.
—
Check if manual override (if applicable) has not been left in locked position
and is interfering. Ensure that it is fully disengaged to allow movement of
the operator.
NOTE:
If the problem persists, please continue to the next section.