Endress+Hauser Liquitrend QMW43, Руководство по эксплуатации

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Liquitrend QMW43 Diagnostics and troubleshooting
Hauser 19
7. Tank is emptied.
 The sensor no longer detects any product residue.
Signal OU1: buildup ~ 0 mm
Signal OU2: conductivity ~ 0 µS/cm
Contact your Hauser sales partner if the device is to be used in pipes or tanks
that are always filled, or to determine the homogeneity of mixtures.
11 Diagnostics and troubleshooting
11.1 Error indication
If an electronics/sensor defect is present in the device, the device changes to the error
mode and displays the diagnostic event F270 via IO-Link communication. The status of the
process data is rendered invalid.
When an error or a defect occurs, the analog outputs used (4 to 20 mA/frequency) switch
to the defined failure current/frequency range.
11.2 General troubleshooting
Device does not respond
Supply voltage does not match the value indicated on the nameplate.
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Apply correct voltage.
The polarity of the supply voltage is wrong.
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Correct the polarity.
Connecting cables are not in contact with the terminals.
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Check for electrical contact between cables and correct.
No communication
Connecting cable is defective, incorrectly connected or is not making contact.
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Check wiring and cables.
There is an error in the device, which is preventing communication.
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Replace device.
No transmission of process data
Internal sensor error or electronics error.
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Correct all errors that are displayed as a diagnostic event .
11.3 Diagnostic information via light emitting diodes
Green LED not lit
No supply voltage.
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Check connector, cable and supply voltage.
LED not flashing
No communication.
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Check connector, cable, supply voltage and IO-Link master.