Samson foundation 3787, Mounting And Operating Instructions, Page: 29 / 96

4 Operation
Warning!
Before you take the control valve
into operation, carefully move the
control valve to its end position by
covering the hole (manual oper-
ation) on the cover plate (Fig. 11).
On doing so, check whether the
lever mechanism works properly.
If the maximum angle of rotation is
exceeded because the wrong lever
mechanism has been selected or in-
correctly sized, the positioner may
be ruined.
4.1 LEDs
There are two LEDs located inside the cover
used to monitor the positioner during start-
up, operation and to indicate possible faults.
General meaning of LEDs:
Red
Device start-up or error,
no control operation possible
Green
No error detected, control operation
or fail-safe position
(e.g. if not initialized)
Red and green Error detected,
control operation possible
See table below for detailed description.
Description LED
Device start-up: Red on
No error detected:
Device connected to bus, cold start completed,
initialization required
Initialization or zero calibration running
Device is initialized, no valid set point
Device is initialized, valid set point, control operation
Green, generally
Green blinks slowly
Green blinks quickly
Green blinks 3x q long interval
Green on
Error in the control loop:
Zero point error
Control loop fault
Red and green
Red and green blink slowly
Red and green blink quickly
Error leading to first initialization being cancelled
(Device does not go to standard operation)
Zero point error
Mechanics/pneumatics failure
Control loop fault
Red, generally
Red blinks slowly
Red on
Red blinks quickly
Device errors causing the control operation to be
left
Device has detected an internal fault Red blinks 3x q long interval
EB 8383-1 EN
29
Operation