Diagnostics and troubleshooting
RN42
14
Hauser
9
Diagnostics and troubleshooting
9.1
General troubleshooting
Always start troubleshooting with the checklists below if faults occur after startup or
during operation. The checklists take you directly (via various queries) to the cause of the
problem and the appropriate remedial measures.
Due to its design, the device cannot be repaired. However, it is possible to send the
device in for examination. See the "Return" section.
General faults
Fault
Possible cause
Remedial action
Device does not respond.
Supply voltage does not match the
voltage specified on the nameplate.
Check the voltage directly using a
voltmeter and correct.
Connecting cables are not in contact
with the terminals.
Ensure electrical contact between the
cable and the terminal.
Electronics module is defective.
Replace the device.
HART communication is not
working.
Missing or incorrectly installed
communication resistor.
Install the communication resistor (230
Ω) correctly.
HART modem is not properly
connected.
Connect HART modem correctly.
HART modem is not set to "HART".
Set HART modem selector switch to
"HART".
The power LED on the DIN
rail device is not lit (green).
Power failure or insufficient supply
voltage.
Check the supply voltage and check if
wiring is correct.
High-alarm at the input
cannot be output at the
output.
Output load is too high (max. output
load active / passive: see technical
data)
Reduce output load.
Passive mode: external voltage at the
output is incorrectly connected.
Connect external voltage correctly to
output.
10
Maintenance
No special maintenance work is required for the device.
Cleaning
A clean, dry cloth can be used to clean the device.
11
Repair
11.1 General information
Due to its design, the device cannot be repaired.