Endress+Hauser RN22, Руководство по эксплуатации, Страница: 15 / 40

RN22 Diagnostics and troubleshooting
Hauser 15
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 information in the "Return" section.
General errors
Error Possible cause Remedial action
Device is not responding. Supply voltage does not match the
specification 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 unit is defective. Replace the device.
HART communication is not
working. Communication resistor missing or
incorrectly installed. 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.
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.