Flowserve 500+ Series Logix - Manual (Page 54)

User Instructions - Logix® 500+ Series Digital Positioners FCD LGENIM0105-10 11/13
flowserve.com 54
Possible Solutions: Check friction, supply pressure and other
alarms or warnings that would indicate difficulty in moving the
valve. Check packing, and air supply. The warning will
clear when the CST function is turned off or when a
successful attempt to move the valve occurs.
YGRR
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PARTIAL STROKE TEST FAILED WARNING
Description: Measured times or forces during the last partial
stroke test did not pass the criteria set by the user. This may
be an indication of corrosion build-up on the valve stem or in
the actuator, low or restricted supply pressure, or a sticking
positioner relay.
Possible Solutions: This warning will clear upon completion
of a successful partial stroke test.
YYGG
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TEMPERATURE HIGH WARNING
TEMPERATURE LOW WARNING
Description: The temperature of the internal electronics has
exceeded the manufacturer set limits of -40°C (-40°F) to
85°C (176°F). Low temperature may inhibit responsiveness
and accuracy. High temperature may affect performance or
limit the life of the positioner.
Possible Solutions: Regulate the temperature of the
positioner by shading or cooling supply gas. Heat the
positioner if needed. If the temperature reading is in error,
replace the main board.
YYGY
●● ● ●
VALVE CLOSED TOO FAR WARNING
VALVE OPENED TOO FAR WARNING
Description: While the valve was in use, it closed or opened
farther than it did at the last calibration by 0.5%.
Possible Solutions: Check the feedback arm linkage and
ensure the valve stem connection is tight. Recalibrate the
stroke. If the process cannot be interrupted a service
technician may be able to adjust the calibration.
YYGR
●● ● ●
SUPPLY PRESSURE HIGH WARNING
Description: The supply pressure is above the user set
warning limit. Supply pressure that exceeds the maximum
rating on the actuator can become a potential hazard.
Possible Solutions: Regulate the supply pressure at the
positioner below the maximum limit recommended for your
actuator. Recalibrate pressure sensors. Check the pressure
sensor board connections. Replace pressure sensor board if
necessary.
YYYG
●●● ●
SUPPLY PRESSURE LOW WARNING
Description: The supply pressure is below the user set
warning limit. Low supply pressure can cause poor valve
response or positioner failure. The minimum recommended
supply pressure for proper operation is 1.3 bar (19 PSI).
Possible Solutions: Regulate the supply pressure at the
positioner above 1.3 bar (19 PSI). Ensure system air/gas
supply is adequate. Repair kinked or restricted supply
tubing. Check for pneumatic leaks in the actuator and
actuator tubing. Recalibrate pressure sensors. Check the
pressure sensor board connections and replace pressure
sensor board if necessary.
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