Troubleshooting; Overview; Critical Diagnostics Screens; Fault Conditions And Recommended Corrective Actions - Honeywell ST 700 User Manual

7.1 Overview

Troubleshooting involves responding to error messages, primarily displayed by the MC Toolkit. Error
messages that may occur on the Transmitter's local display are fairly self-explanatory and intuitive.
However, this section covers the diagnostic messages that indicate critical conditions. Other than the
critical conditions, additional detail is not provided. If you require assistance, contact your distributor
or Honeywell Technical Support. All other messages are covered by the MC Toolkit Users' Manual.

7.2 Critical Diagnostics Screens

The Basic Display will display the message CRITCAL FAULT on the top line of the LCD and the
appropriate diagnostic text on the lower line.
A description of the diagnostic conditions is given in Table 14 along with suggested actions for
resolving the problem.

7.2.1 Fault Conditions and Recommended Corrective Actions

Table 14 – Fault Conditions and Recommended Corrective Actions.
Condtion
fault.
A critical failure has
been detected in the
Meter body
Electronics Module
Fault.
A critical failure has
been detected on
the HART, DE, or FF
Electronics Module.
Meter body Comm
fault.
Communications
between the Meter
body and the
Electronics Module
has failed.
Revision 2.0

7 Troubleshooting

Analysis
Use a HART, DE, or FF
communicator to read the detailed
status information from the
transmitter. Refer to the appropriate
communicator manual to get more
information about the possible
causes of the failure.
Use a HART, DE, or FF
communicator to read the detailed
status information from the
transmitter. Refer to the appropriate
communicator manual for more
information about the possible
failure causes.
This could be the result of a failure
on either of these modules or the
cable that connects them.
Use a HART, DE, or FF
communicator to read the detailed
status information from the
transmitter. Refer to the
appropriate communicator manual
to get more information about the
possible causes of the failure.
ST 700 Smart Pressure Transmitter User's Manual
Recommended Corrective
Action
Cycle power to the Transmitter. If
the problem continues to occur,
replace the Meter body.
Cycle power to the transmitter.
If the problem continues to occur
replace the Electronics Module.
Check the ribbon cable that
connects the Meter body to the
Electronics Module. Make sure
that the cable is securely plugged
into the Electronics Module. Make
sure that all pins are plugged into
the connector (i.e., make sure that
the connector is not offset in a way
that leaves some pins
unconnected).
Cycle power to the transmitter.
If the problem continues to occur
replace the Electronics Module. If
this does not fix the problem,
replace the Meter body.
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