Flowserve Logix 3800zb User Manual

Logix™ 3800zb Digital Positioner FCD AIIOM001030_EN 02/23
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Name
Description
Possible Solution
LED Color
Code
Low Battery Warning
The battery for the real time clock is
low. The battery is designed for a 15+
year life with the positioner unpowered.
The battery is not required for the
positioner to control properly, but is
used only to maintain the time and date
upon loss of power. The time and date
affect the time stamps of alarms,
warnings and other events. This
warning could be caused by rapidly
power cycling the positioner.
The battery is not replaceable.
Verify or reset the time and date.
Replace the electronics assembly if
the problem persists for several
days.
No Motion Time Out
During a stroke calibration, there was
no valve motion detected. Because
some valves are quite large, this
indicator can take up to 9 minutes to
detect an error.
Check linkages and air supply to
make sure the system is properly
connected. If the time out occurred
because the actuator is very large
then simply retry the QUICK-CAL
and the positioner will automatically
adjust for a larger actuator by
doubling the time allowed for
movement. This error may be
cleared by briefly pushing the
QUICK-CAL.
NVMEM CRC Error
The CRC test of the internal data did
not pass. This may affect the function
of the positioner in various ways or not
at all. This will trigger the Memory
Error Warning.
Error may clear with time. If error
persists, cycle power and complete
a QUICK-CAL. If the error still
persists, perform a factory reset or
replace the main circuit board.
Partial Stroke Test
Failed Warning
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.
This warning will clear upon
completion of a successful partial
stroke test.
Partial Stroke Test
Scheduled
The schedule established by the user
shows that a partial stroke test is due.
Follow internal procedures to initiate
a partial stroke test (PST). A partial
stroke test will cause the valve to
move suddenly and the positioner
will not respond to commands while
the PST is in progress. See the
Partial Stroke Test page of the DTM
to verify PST settings.
Piezo Voltage Low
Alarm
The voltage to the piezo is too low. The
piezo may be damaged. This may
prevent the proper failure position upon
loss of signal/power. This condition
may occur briefly on an air-to-close
valve that is held for long periods of
time in the closed position, or an air-to-
open valve held in the open position.
Ensure the supply pressure is not
low. If alarm persists for more than
30 minutes, the Piezo assembly is
damaged. Replace the pilot relay.
Piezo Voltage Low
Warning
The voltage to the piezo is too low. The
piezo may be damaged. This may
prevent the proper failure position upon
loss of signal/power. This condition
may occur briefly on an air-to-close
valve that is held for long periods of
time in the closed position, or an air-to-
open valve held in the open position.
Ensure the supply pressure is not
low. If alarm persists for more than
30 minutes, the Piezo assembly is
damaged. Replace the pilot relay.

Flowserve Logix 3800zb Specifications

General

Brand	Flowserve
Model	Logix 3800zb
Category	Industrial Equipment
Language	English