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34
12 Troubleshooting
The unit has many self-diagnostic options� It monitors itself automatically during
operation�
Warnings and error states are displayed, even when the display is switched off�
Error indications are also available via IO-Link�
Display Type
Description
Fault correction
Err
Error
Unit faulty / malfunction
►
Replace the unit�
No display Error
• Supply voltage too low�
• Setting [diS] = OFF
►
Check the supply voltage�
►
Change the setting [diS]
Loc
Warning Setting pushbuttons on the
unit locked, parameter change
rejected�
►
C�Loc
Warning Setting buttons on the unit
temporarily locked, parameter
setting via IO-Link communica-
tion active�
►
Finish parameter setting via
IO-Link communication�
S�Loc
Warning Setting buttons locked via
parameter software, parameter
change rejected�
►
Unlock the unit via IO-Link
interface using the parame-
ter setting software�
UL
Warning Below the display range�
• Current value between
-130 % ��� -120 % MEW
• Temperature value between
-50���-40 °C or -58���-40 °F
►
Check flow range /
temperature range�
cr�UL
Error
Below the detection zone�
• Flow value < -130 % MEW
• Temperature value < - 50 °C
or -58 °F
►
Check flow range /
temperature range�
OL
Warning Display range exceeded�
• Current value between
120 % ��� 130 % MEW
• Temperature value between
100���110 °C or 212���230 °F
►
Check flow range /
temperature range�
cr�OL
Error
Detection zone exceeded�
• Flow value > 130 % MEW
• Temperature value > 110 °C
or 230 °F
►
Check flow range /
temperature range�