Troubleshooting And Service; Identifying The Problem; Configuring Diagnostic Tools; Running Simulations - ABB LLT100 Operating Instructions Manual

13 Troubleshooting and service

13.1 Identifying the problem

If the LLT100 is malfunctioning in any way, the LCD displays
specific error messages destined to help you identify and
solve the problem.
When an error happens, a message consisting of an icon and
text appears at the bottom of the LCD.
Before
During
Figure 32 LCD before and during an error
This short message gives you a quick indication of the nature
of the problem at hand. The error text beside the icon provides
information about the potential location of the error.
The following table gives you a quick way to identify the basic
problem.
Icon Description
Error/Failure
Functional check
(e.g. during simulation)
Maintenance required
To obtain more information about the currently diagnosed
error, you need to access the Diagnostics operator menu.
To do so:
1. Press the Left arrow key to access Operator menus.
2. Press Select to access the Diagnostics screen, where you
gain access to a more complete error description and some
help text.
In the error description, the error number is displayed in the
second line (for example: F204.042). The next two lines are
used to describe the error.
The two last digits of the error number correspond to the
error code described in Table 4 on page 45. In the example
above, F204.042, "42" refers to the target lost error, as also
indicated by the error message.
WARNING Permanent Namur Process Error
Error text
and icon

13.2 Configuring diagnostic tools

Most troubleshooting data available is configured from the
Diagnostics configuration menu.
Error text

13.3 Accessing diagnostic history

Electronic
Transmitter
The LLT100 keeps historical records of the various diagnostic
Configuration
incidents. To access these records, select History >
Operation
Diagnostic History from the Diagnostics menu.
Process
A series of diagnostic records becomes available on screen,
where you can scroll through them.
13.3.1
When the list of diagnostic records becomes too long, you can
clear that history:
To do so:
1. From the Diagnostics menu, select History > Clear Diag
History.
2. From the Clear Diag History menu, press OK.
All the diagnostic history is deleted.
When "F204.042 – Target Lost Error" is permanently
displayed on the LCD, a safety inspection of the sensor
must be performed without delay. This error may
announce failure of the primary process seal.
Please contact ABB for service.
Erasing diagnostic history
OI-LLT100-EN Rev. D | User Guide 41