Troubleshooting; Overview; Critical Diagnostics Screens; Fault Conditions And Recommended Corrective Actions - Honeywell STT750 SmartLine 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

When a Critical Diagnostic is present in the Transmitter, the Display will display the message
CRITICAL FAULT on the top line of the LCD and the appropriate diagnostic text on the lower line.

7.2.1. Fault Conditions and Recommended Corrective Actions

Table 9 – Fault Conditions and Recommended Corrective Actions.
Condtion
Electronics Module
Fault.
A critical failure has
been detected on the
HART Electronics
Module.
Temperature Sensor
Module Fault.
A critical failure has
been detected on the
Temperature Sensor
Module.
Temperature Sensor
Comm Fault.
Cannot communicate
with the Temperature
Sensor Module.
Revision 4

7. Troubleshooting

Analysis
Use a HART communicator to read the
detailed status information from the
transmitter. Refer to the appropriate
communicator manual for more
information about the possible failure
causes.
Use a HART communicator to read the
detailed status information from the
transmitter. Refer to the appropriate
communicator manual for more
information about the possible failure
causes.
Use a HART communicator to read the
detailed status information from the
transmitter. Refer to the appropriate
communicator manual for more
information about the possible failure
causes.
STT750 Temperature Transmitter User's Manual
Recommended Corrective
Action
Cycle power to the
transmitter.
If the problem continues to
occur replace the Electronics
Module.
If the diagnostic status
indicates an input problem
(burnout, out of range, etc.),
correct the root error and then
cycle power to the transmitter.
If the problem continues to
occur replace the
Temperature Sensor Module.
Cycle power to the
transmitter.
If the problem continues to
occur replace the
Temperature Sensor Module
Page 35