ABB LMT100 - Troubleshooting; Error Messages and Alarms

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LMT SERIES | MAGNETOSTRICTIVE LEVEL TRANSMITTER | OI/LMT100/200-EN REV.B
9 Troubleshooting
Error messages via HMI display and HART signal
In case of transmitter errors or malfunctioning, the HART signal (via DTM, EDDL) and HMI are capable of displaying specific error /
fault messages to aid the user in identifying the problem and resolving it. In the case of an alarm, a message consisting of an icon
and text displays at the bottom of the process display. Use the (1) key to call up the information level. Use the “Diagnostics” menu
to bring up the error description with the corresponding help text. In the error description, the error number is displayed in the
second line (M028.018). Two further lines are used to describe the error. The device status is divided into four groups. The message
text beside the icon in the display provides information about where to look for the error. There are five areas: Electronics, Sensor,
Configuration, Operating and Process.
Icon Description
Error / failure
Functional check (for example, during simulation)
Out of specification
Maintenance required
Error states and alarms
The following represents the errors states / alarms the LMT Series transmitters can encounter along with the recovery action
needed to correct the issue.
Error Message Tx LCD Message Possible Cause Suggested Action Tx Response
 Electronics NV Failure Electronics memory is
corrupted
The electronics must be replaced Analog signal to alarm
 Current Output
Failure
The output circuit could be
broken or not correctly
calibrated
A DAC (digital to output converter) trimming
should be performed and if the error persists the
communication board must be replaced
Analog signal to alarm
 Primary Current
Uncertain
The D to A converter is not
properly calibrated or
trimmed.
A DAC (digital to output converter) trimming
should be performed and if the error persists the
communication board must be replaced
Analog signal to alarm
The device is not properly
configured
Check the device configuration
 Safety Function Flow
Failure
Calculation of safety function
did not occur in the proper
sequence
Restart the device. If the condition persists
contact service for a replacement.
Analog signal to alarm
 Electronics RAM
Failure
Electronics memory test failed Restart the device. If the condition persists
contact service for a replacement.
Analog signal to alarm
Process data memory check
failed (dynamic duplicated
error)
 Electronics ROM
Failure
Program memory test failed Restart the device. If the condition persists
contact service for a replacement.
Analog signal to alarm
 Self-test failure Restart the device. If the condition persists
contact service for a replacement.
Analog signal to alarm
 Data Simulation
Warning
The Level Value produced in
output is derived by the value
simulated in input
Using a HART configurator (DTM - Hand held)
place device back in normal operating mode
(Remove input simulation)
No effect
 Alarm Simulation
Warning
An alarm condition is being
simulated by the device
Using a HART configurator (DTM - Hand held)
place device back in normal operating mode
(Remove input simulation)
Depends on alarm
simulated