Diagnostics And Troubleshooting - Endress+Hauser iTEMP TMT162 Operating Instructions Manual

Diagnostics and troubleshooting

34
9 Diagnostics and troubleshooting
9.1 Troubleshooting
Always start troubleshooting with the checklists below if faults occur after start up or
during operation. This takes you directly (via various queries) to the cause of the problem
and the appropriate remedial measures.
In the event of a serious fault, a device might have to be returned to the manufacturer
for repair. Refer to the "Return" section before returning the device to Endress+Hauser.
→  43
Check display (local display)
Display is blank - no connection to
the HART host system.
Display is blank - however,
connection has been established to
the HART host system.

Local error messages on the display
→  36

Faulty connection to the fieldbus host system
Problem Possible cause
Device is not Supply voltage does not match the value
responding. indicated on the nameplate.
Connecting cables are not in contact with
the terminals.
Output current < 3.6 Signal line is not wired correctly.
mA
Electronics unit is defective.
HART Communication resistor missing or
communication is incorrectly installed.
not working.
Commubox is connected incorrectly.

Error messages in the configuration software
→  37

Application errors without status messages for RTD sensor connection
Problem
Measured value is incorrect/
inaccurate
1. Check the supply voltage → terminals + and -
2. Measuring electronics defective → order spare part, →  41
1. Check whether the display module fitting kit is correctly seated on the
electronics module →  14
2. Display module defective → order spare part, →  41
3. Measuring electronics defective → order spare part, →  41
Possible cause
Incorrect sensor orientation.
Heat conducted by sensor.
iTEMP TMT162
Solution
Apply correct voltage
Check the connection of the cables and
correct if necessary.
Check wiring.
Replace the device.
Install the communication resistor (250 Ω)
correctly.
Connect Commubox correctly.
Solution
Install the sensor correctly.
Observe the face-to-face length of the
sensor.
Endress+Hauser