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Reference Manual
00809-0100-4860, Rev BC
Section 5: Troubleshooting
January 2013
Troubleshooting
FAULT_TACO (MTA option only)
The ASIC responsible for the analog to digital conversion of the process temperature has failed.
Contact your Field Service Center.
FAULT_TC (MTA option only)
The temperature sensor that is used to measure the process temperature has failed. Contact
your Field Service Center.
FAULT_RTD (MTA option only)
The RTD for cold junction compensation has failed. Contact your Field Service Center.
SIGNAL_SIMUL
The transmitter flow signal is being simulated by a signal generator internal to the transmitter.
The actual flow through the meter body is NOT being measured.
SENSOR_OFFLINE
The transmitter flow signal is being simulated by a signal generator external to the transmitter.
The actual flow through the meter body is NOT being measured.
FAULT_LOOPV
The voltage at the transmitter terminals has dropped to a level that is causing the internal
voltage supplies to drop, reducing the capability of the transmitter to accurately measure a flow
signal. Check the terminal voltage and either increase the power supply voltage or reduce loop
resistance.
5.5 Testing procedures
Use the test functions to verify that the flowmeter is functioning properly, or when you suspect
component failure or a problem with loop performance, or when instructed to do so as part of a
troubleshooting procedure. Initiate each test with a HART-based communications device. See
“Diagnostics/service” on page 47 for details.
5.6 Hardware replacement
The following procedures will help you disassemble and assemble the Rosemount 8600D
hardware if you have followed the troubleshooting guide earlier in this section of the manual
and determined that hardware components need to be replaced.