Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
97
Alarm
Code
Abbreviation
Status / Alarm name
Description or proposed actions
13
TVLH
Travel Hi Limit
It is active when the travel exceeds Travel Hi Limit.
14
TVLL
Travel Lo Limit
It is active when the travel falls below Travel Lo Limit.
15
dVTO
Deviation Time Out
It is active when actual deviation greater than the preset
Deviation persists longer than the preset Deviation Time.
Check if the setting is appropriate or if there is no problem
with the friction of valve/actuator, pneumatic leaks,
insufficient supply pressure.
16
PSTF
PST Failure
It is active when Partial Stroke Test has failed. Remove the
cause of the fail after checking the response code of the
PST.
17
TSNF
Temperature Sensor
Defect
It is active when internal temperature sensor has failed. If it
is repeated, replace the electronics board by contacting the
manufacturer or manufacturer’s representative.
18
PSNF
Position Sensor Defect
It is active if there is a problem with the position feedback
sensor inside the positioner. If it is repeated, replace the
electronics board by contacting the manufacturer or
manufacturer’s representative.
19
ABdS
Abnormal Drive Signal
It is active if there is a problem with I/P converter. If it is
repeated, replace the electronics board by contacting the
manufacturer or manufacturer’s representative.
21
IVLH
Integral Value Hi Limit
It is active if the integrator output is saturated at Integral
Value Hi Limit. It may happen when the valve/actuator has
a high friction.
22
IVLL
Integral Value Lo Limit
It is active if the integrator output is saturated at Integral
Value Lo Limit. It may happen when the valve/actuator has
a high friction.
23
TVCH
Travel Cutoff Hi Limit
It is active when the travel exceeds the available high
stroke of the valve/actuator. The available stroke is already
set by auto calibration.
24
TVCL
Travel Cutoff Lo Limit
It is active when the travel is below the available low stroke
of the valve/actuator. The available stroke is already set by
auto calibration.
28
NCAL
Not Calibrated
It is active when auto-calibration has not done after
installation. Perform AUTO 2 calibration after checking if
the installed state is good.
29
CALF
Auto Calibration
Failure
It is active when auto-calibration has failed. Retry auto-
calibration after checking if there is no problem with
installed state such pneumatic leaks, lever position and
others.
30
ZPdR
Zero Point Drift
It is active if zero point or endpoint exceeds the settings.
The valve seat may be damaged or there may a linkage
problem associated with lever.
31
EPdR
EndPoint Drift
