Logix
®
Digital Positioners FCD LGENIM0110-0 05/16
flowserve.com
47
YYYY
●●●●
ACTUATION RATIO WARNING
Description: The force required to control the system is
close to the maximum available force. Actuation Ratio is
based on the ratio of available force to the required force to
fully actuate. Control may be lost if this ratio reaches
100%. It is affected by the process load, friction, spring
force, and available supply pressure.
Possible Solutions: Increase the supply pressure. Reduce
the friction. Check the actuator spring. Resize the
actuator. Adjust user set limits.
YYYR
●●●
●
MEMORY ERROR WARNING
Description: The microprocessor's memory has a problem.
Possible Solutions: Error may clear with time. If error
persists, cycle power and complete a QUICK-CAL. If the
error still persists, perform a factory reset, reprogram or
replace the main circuit board.
YYRG
●●
●
●
SOFTWARE ERROR WARNING
Description: 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.
YYRY
●●
●
●
AIR SUPPLY HUMID WARNING
Description: 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.
YYRR
●●
●●
AIR SUPPLY ICING WARNING AIR SUPPLY ICING
WARNING
Description: 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.
YRGG
●
●
●●
PILOT RELAY RESPONSE WARNING
Description: The pilot relay is sticking or slow to respond.
This affects the responsiveness, increases the chance of
limit cycling and excessive air consumption. The pilot relay
is part of the inner loop and consists of the driver module
assembly with piezo (I-P relay) which is coupled to the
spool valve. The value of this indicator corresponds with
inner loop lag. Delayed response can be caused by a
partially clogged piezo or debris, oil, corrosion, or ice on the
spool, or low supply pressure.
Possible Solutions: Check response of the valve. If OK,
adjust Pilot Relay Response limits. Check supply pressure.
Check the spool for debris, oil, corrosion, ice on the spool.
Clean or replace the spool assembly. Replace the piezo or
driver module assembly. Maintain a clean, water-free
air/gas supply.
YRGY
●
●
●
●
FRICTION LOW WARNING
Description: The friction has passed below the user set
limit. Low friction is an indication of improperly loaded
packing and, in severe cases, can be an indication of the
process fluid leaking at the valve stem.
Possible Solutions: Check for packing leak. Tighten or
replace the valve packing.
YRGR
●
●
●
●
FRICTION HIGH WARNING
Description: The valve and actuator friction has passed the
user set limit. High friction can cause loop oscillations,
poor position control, jerky motion, or valve sticking. It can
be caused by build-up from the process on the stem, trim
or seat, by a failing bearing or guides in the valve and
actuator, galling of the trim or stem, excessively tightened
packing, linkages, or other valve or actuator mechanical
issues.
Possible Solutions: Determine if the friction is significantly
interfering with the valve control. If not, consider increasing
the friction warning limit. Consider the following to reduce
friction: Stroke the valve to clear off build-up. Clear any
external mechanical obstruction, loosen the packing, clean
the stem, repair or replace the actuator. Highly localized
friction or very jerky travel can indicate internal galling.
Repair or replace internal valve components.
YRYY
●
●
●●
BACKLASH WARNING
Description: The amount of detected backlash has passed
the user set warning limit. This may affect valve stability.
