7 Maintenance TMT182
26 Endress+Hauser
9.3 Application faults without messages
Application fault without
messages
General application faults
Application faults for RTD connection (Pt100/Pt500/Pt1000/Ni100)
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
Fault code Cause Action/cure
Fault Cause Action/cure
No communication No power supply on 2 wire circuit Check current loop
Power supply too low (<10 V) Connect cables correctly to terminal
plan (polarity)
Defective interface cable Check interface cable
Defective interface Check PC interface
Defective head transmitter Replace head transmitter
Fault Cause Action/cure
Fault current
(
≤ 3.6 mA or ≥ 21 mA)
Defective sensor Check sensor
Incorrect RTD connection Reconnect cables correctly (connec-
tion 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 page 20.)
Programming Thermocouple set up (see
chapter 6.2.5); change to RTD
Defective head transmitter Replace head transmitter
Measured value incorrect/inaccurate Faulty sensor installation Install sensor correctly
Heat conducted via sensor Take note of sensor installation
length
Transmitter programming faulty (wire
number)
Change parameter ‘Connection type’
Transmitter programming faulty (scale) Change scale
Wrong RTD used Change parameter ‘Sensor type’
Sensor connection (2 wire) Check sensor connections
Sensor cable (2 wire) not compensated Compensate cable resistance
Offset incorrectly set Check offset
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