Deltabar FMD71, FMD72 Diagnostics and troubleshooting
Endress+Hauser 65
10 Diagnostics and troubleshooting
10.1 Troubleshooting
General errors
Problem Possible cause Solution
Device is not responding. 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 terminals.
Check the connection of the cables and
correct if necessary.
No display Onsite display is set too bright or too
dark.
• Set the onsite display brighter by
simultaneously pressing and .
• Set the onsite display darker by
simultaneously pressing and .
Connector for onsite display is not
properly connected.
Connect the plug correctly.
Onsite display is defective. Replace onsite display.
Output current < 3.6 mA Signal line is not wired correctly.
Electronics unit is defective.
Check wiring.
Replace electronics.
Device measures
incorrectly.
Configuration error. Check and correct parameter
configuration (see below).
HART communication is not
working.
Communication resistor missing or
incorrectly installed.
Install the communication resistor (250
Ω) correctly.
Commubox is connected incorrectly. Connect Commubox correctly.
Commubox is not set to "HART". Set Commubox selector switch to
"HART".
10.2 Diagnostic events
10.2.1 Diagnostic message
Faults detected by the self-monitoring system of the measuring device are displayed as a
diagnostic message in alternation with the measured value display.
Status signals
The table → 66 lists the messages that may occur. The ALARM STATUS parameter
shows the message with the highest priority. The device has four different status
information codes according to NAMUR NE107:
A0013956
"Failure"
A device error has occurred. The measured value is no longer valid.
A0013957
"Maintenance required"
Maintenance is required. The measured value remains valid.
A0013959
"Function check"
The device is in service mode (e.g. during a simulation).
A0013958
"Out of specification"
The device is operated:
• Outside its technical specifications (e.g. during warm-up or cleaning).
• Outside of the configuration carried out by the user (e.g. level outside configured span)
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