Flowserve 500+ Series Logix - Manual (Page 57)

User Instructions - Logix® 500+ Series Digital Positioners FCD LGENIM0105-10 11/13
flowserve.com 57
RYGR
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POSITION AMPLITUDE ALARM
POSITION FREQUENCY ALARM
Description: The amplitude or frequency of the position signal
is above the alarm limit. The positioner is controlling the
position of the valve with large or rapid corrections.
Possible Solutions: Verify the limits are set at an appropriate
level. Adjust the selectable Gain switch to a lower setting or
use the Hi Friction setting. Perform a QUICK-CAL which
sets the gains based on valve response. Check for high
friction. If the problem persists replace the relay.
RYYG
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SUPPLY PRESSURE LOW ALARM
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.
RYYY
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AUX CARD 2 ERROR
Description: Auxiliary Card 2 has an electrical problem.
AUX CARD 2 FAILURE WARNING
Description: Auxiliary Card 2 is not communicating.
AUX CARD 2 NO LOOP POWER
Description: Auxiliary Card 2 has no loop current.
Possible Solutions: MFC: Check auxiliary loop wiring and
ensure adequate compliance voltage and current. Check
auxiliary card connection to the main board. Replace card if
condition persists.
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AUX CARD 1 ERROR
Description: Auxiliary Card 1 has an electrical problem.
AUX CARD 1 FAILURE WARNING
Description: Auxiliary Card 1 is not communicating.
AUX CARD 1 NO LOOP POWER
Description: Auxiliary Card 1 has no loop current.
Possible Solutions: MFC: Check auxiliary loop wiring and
ensure adequate compliance voltage and current. Check
auxiliary card connection to the main board. Replace card if
condition persists.
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POSITION SENSOR FAILURE ALARM
Description: The feedback arm may be disconnected from
the valve assembly or the sensor has failed.
Possible Solutions: Check the feedback arm linkage.
Recalibrate. If the problem persists return the unit for repair.
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PRESSURE SENSOR BOARD FAILURE WARNING
Description: One or more pressure sensors may have failed.
Possible Solutions: Check the supply pressure to ensure it is
between 1.3 and 10.3 bar (19 and 150 PSI). Check the
pressure sensor board connections. Recalibrate the
pressure sensors. If the problem persists, replace the
pressure sensor board.
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MAIN BOARD ELECTRONIC FAILURE WARNING
Description: 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.
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PILOT RELAY RESPONSE ALARM
Description: The pilot relay is sticking or extremely slow to
respond. This affects the responsiveness, increases the
chance of limit cycling and excessive air consumption. The
pilot relay consists of the driver module assembly with piezo
(I-P relay) which is coupled to the spool valve or poppet.
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 the supply
pressure. Check the spool or poppet 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.
RRGY
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FRICTION LOW ALARM
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 a packing leak. Tighten or
replace the valve packing.
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FRICTION HIGH ALARM
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,