Flowserve Logix MD+ ValveSight - Manual (Page 38)

ValveSight™ Diagnostics DTM Manual for Logix MD+ Positioner with HART®
FCD- LGENSF0014-00
© Flowserve Corporation
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spring may have failed, or it was not sized properly for the application.
Friction or process load may have increased.
•
Possible Solutions: Repair or replace actuator spring. Check for high
friction. Reduce process load.
Pneumatic Leak
•
Definition: The positioner has detected a leak in the actuation
assembly.
•
Implications: Leakage from the actuator can cause decreased
responsiveness and excessive air/gas consumption.
•
Possible Solutions: Repair pneumatic leaks at the tubing junctions
and actuator seals. Check spool valve for excessive wear.
Air Supply Humid
•
Definition: The supply gas has high relative humidity which can lead to
condensation on electronic components and failure of electronic
functions.
•
Possible Solutions: Ensure supply gas is clean and dry. Check and
clean the regulator filter.
Air Supply Icing
•
Definition: The supply gas has high relative humidity and the
temperature is close to 0 °C (32 °F). Under these conditions ice may
form in the pilot relay causing diminished or total loss of position
control.
•
Possible Solutions: Ensure supply gas is clean and dry. Check and
clean the regulator filter.
Main Board Status
Main Board Fail
•
Definition: There has been an oscillator fault, position sensor ADC
failure, supply voltage error, reference voltage error, shunt voltage error,
or piezo voltage error.
•
Possible Solutions: This may be caused by transient conditions. If the
error persists, replace the main board.
Software Error
•
Definition: There has been a watch dog time out, stack overflow
warning, or CPU usage warning.
•
Possible Solutions: If the problem persists, perform a factory reset. If
it still persists, reprogram or replace the main board.
Memory Error