Troubleshooting - IFM SM4x00 Operating Instructions Manual

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
Err Error
No display Error
Loc Warning
C�Loc Warning
S�Loc Warning
UL Warning
cr�UL Error
OL Warning
cr�OL Error
34
Description
Unit faulty / malfunction
• Supply voltage too low�
• Setting [diS] = OFF
Setting pushbuttons on the
unit locked, parameter change
rejected�
Setting buttons on the unit
temporarily locked, parameter
setting via IO-Link communica-
tion active�
Setting buttons locked via
parameter software, parameter
change rejected�
Below the display range�
• Current value between
-130 % ��� -120 % MEW
• Temperature value between
-50���-40 °C or -58���-40 °F
Below the detection zone�
• Flow value < -130 % MEW
• Temperature value < - 50 °C
or -58 °F
Display range exceeded�
• Current value between
120 % ��� 130 % MEW
• Temperature value between
100���110 °C or 212���230 °F
Detection zone exceeded�
• Flow value > 130 % MEW
• Temperature value > 110 °C
or 230 °F
Fault correction
► Replace the unit�
► Check the supply voltage�
► Change the setting [diS] →
10�5�2
► Unlock the unit → 10.1.2
► Finish parameter setting via
IO-Link communication�
► Unlock the unit via IO-Link
interface using the parame-
ter setting software�
► Check flow range /
temperature range�
► Check flow range /
temperature range�
► Check flow range /
temperature range�
► Check flow range /
temperature range�