Smart Positioner
YT-2500 / 2550 / 2501 Series
Product Manual
Ver. 1.34
59
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 checked from “Error”
category in View mode. (Refer to
section 9.9)
➢
Re-perform auto-calibration.
➢
C
heck air regulator’s set
pressure and re-adjust to
appropriate pressure.
10.4
Warning code which can be checked from View mode
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 9.9)
➢
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 from “Error”
category in View mode. (Refer to
section 9.9)
➢
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 9.9)
➢
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 9.9)
