iTEMP TMT112 Diagnostics and troubleshooting
Endress+Hauser 23
8.2 Application fault messages
Application fault messages are shown in the display of the ’HART® Communicator’ once the
menu point "ERROR CODE" has been selected.
Fault code Cause Action/cure
0 No fault, Warning None
10 Hardware fault (unit defective) Replace DIN rail transmitter
11 Sensor short circuit Check sensor
12 Sensor cable open circuit Check sensor
13 Reference measurement point defective None
14 Unit not calibrated Return DIN rail transmitter to manufacturer
106 Up-/Download active None (will be automatically acknowledged)
201 Warning: Measured value too small Enter other values for measured value range start
202 Warning: Measured value too large Enter other values for measured value range end
203 Unit is reset (to factory default settings) None
8.3 Application faults without messages
General application faults
Problem Possible cause Remedy
No communication No power supply on 2 wire circuit Check current loop
Power supply too low (< 11.5 V) Connect cables correctly to terminal plan (polarity)
Defective interface cable Check interface cable
Defective interface Check PC interface
Defective DIN rail transmitter Replace DIN rail transmitter
Application faults for RTD connection (Pt100/Pt500/Pt1000/Ni100)
Problem Pausible cause Remedy
Fault current (≤ 3.6 mA or ≥ 21 mA) Defective sensor Check sensor
Incorrect RTD connection Reconnect cables correctly (connection
diagram)
Incorrect 2 wire connection Connect cables correctly to terminal plan
(polarity)
Transmitter programming
faulty (wire number)
Change parameter ’CONNECTION’ (See
“Description of unit functions” on → 18)
Programming Thermocouple set up (See “Description of unit
functions” on → 18); change to RTD
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