Diagnostics and troubleshooting
Liquipoint FTW33
28
Hauser
12
Diagnostics and troubleshooting
12.1 Troubleshooting
If an electronic/sensor defect is present, the device changes to error mode and displays the
diagnostic event F270. The status of the process data is rendered invalid. The switch
output(s) is/are opened.
General errors
Error
Possible cause
Solution
Device does not
respond
Supply voltage does not match the value indicated on
the nameplate.
Apply correct voltage.
The polarity of the supply voltage is wrong.
Correct the polarity.
Connecting cables are not in contact with the termi-
nals.
Check for electrical contact
between cables and correct.
No communication
• Communication cable not connected.
• Communication cable incorrectly attached to device.
• Communication cable incorrectly attached to the IO-
Link master.
Check wiring and cables.
No transmission of
process data
There is an error in the device.
Correct errors that are dis-
played as a diagnostic event.
12.2 Diagnostic information via LED indicator
LED indicator on housing cover
Malfunction Possible cause
Corrective action
Green LED
not lit
No power supply
Check plug, cable and power supply.
Red LED
flashing
Overload or short-circuit in load circuit
• Clear the short-circuit.
• Reduce maximum load current to below 200 mA if
one switch output is active.
• Maximum load current = 105 mA per output if both
switch outputs are active.
Ambient temperature outside of speci-
fication
Operate measuring device in specified temperature
range.
Test magnet held against marking for
too long
Repeat function test.
Red LED
lit
Internal sensor error
Replace device.
12.3 Diagnostic events
12.3.1 Diagnostic message
Faults that are detected by the device's self-monitoring system are displayed as a
diagnostic message via IO-Link.
