TLV CV10, Instruction Manual

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172-65097M-05 (CV10 Control Valve) 7 Oct 2021
23
Problem Cause Diagnosis/Inspection Remedy
No movement at
all Air is not being supplied
to the positioner Make sure that the
compressor is operating
properly; make sure that
the regulator connected to
the positioner inlet is set Initiate the supply of
supply air pressure to the
positioner
(confirm product
specifications)
The input signal wiring is
incorrectly connected Check the
“+ green” and
“- blue” connection
terminals in the
positioner; check the
controller
’s connections
Correct the wiring
connections
The input signal is not
being input Check that 4-20 mA is
being output by the
connection terminals
inside the positioner Adjust the controller or
replace with a new
controller
There is a short in the I/P
transducer coil Check the internal
resistance (approx. 200

)
Replace with a new
positioner
(check to make sure that
the ambient humidity of
the installation is not too
high)
There is water or oil
inside the positioner Check to see if there is
water or oil entrained in
the supply air; check to
see if the humidity at the
location where the control
valve piping location is too
high Replace with a new
positioner or have the
positioner repaired
(improve the quality of
the supply air)
Control valve
opens and
closes too
slowly There is water or oil
inside the positioner Check to see if there is
water or oil entrained in
the supply air; check to
see if the humidity at the
control valve piping
location is too high Replace with a new
positioner or have the
positioner repaired
(improve the quality of
the supply air)
The nozzle and/or
adjuster(s) inside the
positioner are clogged Check the control valve
operation by directly
manipulating the
measurement spring
inside the positioner Have the positioner
repaired
(improve the quality of
the supply air)
The filter/regulator is
clogged Check the filter Clean or replace with a
new filter
Control valve
opening is
unstable The setting of the
controller is faulty Check the set value
based on the controller
’s
PID parameters
Change the set value
The positioner has been
insufficiently adjusted Adjust the positioner
’s
proportional band (air
supply (Q) and gain
adjustment (Xp))