7
Troubleshooting
Fault category
Alarm
Remedy
Resetting alarm
Supply pressure Possibly changed (test)
Check supply pressure.
Refer to the section on
supply pressure in the EB
of the positioner.
Reset
y-x signature measured
data
Possibly at full capacity (test)
Possibly insufficient
Reset over Code 57.
Reset y-x long-term and
short-term monitoring
Trend
concerning full
range of valve
Working range shift
CLOSED position
Check the valve working
range.
Reset
x long-term and short-term
histograms
Working range shift
max. OPEN
Air leakage in
the pneumatics
Possibly exists (test)
Check pneumatic
actuator and
connections for leakage.
Reset
y-x signature measured
data
Possibly too much (test)
Possibly too much
Reset
y-x long-term and
short-term monitoring
Reset over Code 57.
Possibly exists
Restriction of full
range of valve
Downwards
Check pneumatic
accessories and
connections for leakage.
Check supply pressure
and increase it, if
necessary.
Refer to the section on
supply pressure in the EB
of the positioner.
Check plug stem for
problems caused by an
external source.
Reset over Code 57.
Reset
e short-term histogram
Reset
e long-term histogram
Upwards
No change possible
(terminals)
EB 8388 EN
35
Troubleshooting