Smart Positioner
YT-2500 / 2550 / 2501 Series
Product manual
Ver. 1.04
51
C
Indicated if the deviation between
SV and PV is above 10% and is
continued for over one minute.
Indicated when the valve does not
operate, friction is extremely high or
when the air regulator’s set pressure
is too low.
Can be checked from “Error”
category in View mode. (Refer to
section 8.10)
Re-perform auto-calibration.
Chec
k air regulator’s set pressure
and re-adjust to appropriate
pressure.
D
Accumulated I value is I max or
min’s limit.
Degree of precision is low.
Indicated if valve’s friction is
extremely high or set pressure of air
regulator has been changed.
Can be chec
ked from “Error”
category in View mode. (Refer to
section 8.10)
Re-perform auto-calibration
C
heck air regulator’s set pressure
and re-adjust to appropriate
pressure.
9.2
Warning code
Below codes are indicated when the positioner can be controlled, but there is a possibility of
malfunctioning or degree of precision has dropped.
Warning Code
Code Description and Cause
Action
B
PV Span
– PV Zero range is below
500.
Feedback lever
’s angle use is too
low.
Can be checked from “Error”
category in View mode. (Refer to
section 8.10)
Re-position the positioner so that
the angle use of the feedback
lever is larger than current angle.
Then, perform AUTO1 calibration.
F
Full open & Full close time is less
than 1 second.
Size of the actuator is too small.
Can be checked f
rom “Error”
category in View mode. (Refer to
section 8.10)
Use orifice and lower the flow
rate.
Or replace the actuator with
bigger size.
G
PV is set below 100.
F
eedback lever’s angle use is set
too high.
Can be checked from “Error”
category in View mode. (Refer to
section 8.10)
Re-position the positioner so that
the angle use of the feedback
lever is smaller than current
angle. Then, perform AUTO1
calibration.
H
PV is set above 4000.
F
eedback lever’s angle use is set
too high.
Can be checked from “Error”
category in View mode. (Refer to
section 8.10)
