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3 System Operation
E1 A minimum value is not displayed in "Actual value” position and "AU” display
On feedback via potentiometer:
Cause: potentiometer connections transposed
- Check terminals
Cause: Potentiometer incorrectly fitted to the motor shaft
- Turn potentiometer with the connected control element until the desired value is displayed.
Cause: control element is not in "CLOSED” position
- Check whether the "CLOSE” relay on the relay module has pulled on (recognisable from the
LED on the relay module)
Check "F2” fuse (on the power supply front panel) of the VMS
Check lead to the control elements (Is the "CLOSE” signal reaching the control element)
Cause: the FMS has read in an incorrect range limit.
- Re-enter range limits
E2 Feedback does not move, although the control element moves
Check feedback connection to the FMS (See connection diagram)
In order to locate faults, it is recommended that the feedback be simulated at various points
on the feedback circuit (using potentiometer or a current transmitter).
E3 The feedback of the continuous output does not display the values indicated
For feedback via potentiometer, see E4
For feedback via current, see E5
TIP:
To assure, that the FMS works properly, you may connect a 5kΩ potentiometer directly to the
FMS feedback input. This simulates the feedback manually.
E4 The displayed feedback value is much to high or is less than approx. 500 digit
The potentiometer cable are inverted
check the connections
TIP:
In order to ensure that the FMS is working properly you may connect a 5kΩ potentiometer di-
rectly to the FMS feedback input in order to simulate the feedback manually.
E5 Feedback shows "000” and does not vary, even if the current is increased.
The poles of the feedback current signal are probably reversed
Check connections
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