10
8 Error during adjustment
If no adjustment is possible, all LEDs flash red� The unit then passes into the
operating mode with unchanged values�
Possible cause /aid:
Error during installation�
► Read chapter 3 Installation�
Check whether all requirements have
been met�
The difference between maximum flow and
minimum flow is too small�
► Increase the flow difference and carry
out the adjustment once again�
The sequence high flow /low flow adjust-
ment was not adhered to�
► Carry out the two adjustment operations
again in the right sequence�
9 Operation
After every power on all LEDs light and go out again step by step (during this time
the output signal is 20 mA)� The unit is then ready for operation�
In case of power failure or interruption all settings remain�
Operating indicators
Green LED bar: current flow within the representa-
tion range�
LED 9 flashes: current flow above the
representation range�
LED 0 flashes: current flow far below the represen-
tation range�
Interference indicators
Display OFF
(no LED lights):
Operating voltage too low (< 19 V) or failed�
Ensure a correct voltage supply�
