CM14 Troubleshooting
Endress+Hauser 27
10 Troubleshooting
The following section provides you with an overview of possible causes of errors to provide
you with an initial troubleshooting aid.
10.1 Troubleshooting instructions
!
WARNING
Danger from electrical voltage
‣
Do not operate the device for troubleshooting purposes while it is open!
Display Cause Remedy
No measured value display No power supply connected Check the power supply of the device.
Power supply applied, device defective The device must be replaced.
Diagnostic message is displayed For the list of diagnostic messages, refer to the following section.
10.2 Diagnostic messages
The diagnostics message comprises a diagnostics code and message text.
The diagnostics code is made up of the error category as per Namur NE 107 and the message
number.
Error category (letter in front of the message number)
• F = Failure. A malfunction has been detected.
The measured value of the specific channel is no longer reliable. The cause of the
malfunction should be sought in the measuring point. If a controller is connected, this
should be set to manual mode.
• M = Maintenance required. Action may have to be taken soon.
The device stills measures correctly. Immediate measures must not be taken. However,
proper maintenance efforts would prevent a possible malfunction in the future.
• C = Function check. (No error).
Maintenance work is being performed on the device. Wait until the work has been
completed.
• S = Out of specification. The measuring point is being operated outside specifications.
Operation is still possible. However, you run the risk of increased wear, a shorter operating
life or lower accuracy levels. The cause of the problem should be sought outside the
measuring point.
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