CM14 Troubleshooting
Endress+Hauser 31
10 Troubleshooting
To help you troubleshoot, the following section is designed to provide an overview of possible
causes of errors and initial remedial measures.
10.1 Troubleshooting instructions
L
WARNING
Danger! Electric voltage!
‣
Do not operate the device in an open condition for error diagnosis!
User interface Reason Solution
No measured value displayed No power supply connected Check the power supply to the device.
Power is supplied, device is defective The device must be replaced.
Diagnostic message is displayed The list of diagnostic messages is provided in the following section.
10.2 Diagnostic messages
The diagnostic message consists of a diagnstic code and a message text.
The diagnostic code consists of an error category according to Namur NE 107 and a message
number.
Error category (character front of message number)
• F = Failure, a malfunction has been detected.
The measured value of the respective channel is no longer reliable. The cause can be found
at the measuring point. If a control system is connected, you should switch to manual
operation.
• M = Maintenance required, action has to be taken as soon as possible.
Functionality of the measurement is fulfilled. No immediate measure needs to be taken.
However, maintenance prevents possible future malfunction.
• C = Function check, wait loop (no error).
Maintenance is performed on the device. Wait for completion of the process.
• S = Out of specification, the measurement point is operated out of specification.
Measurement is still possible. However, operation takes place with risk of higher wear,
shortened lifespan or lower measurement accuracy. The cause can be found at the
measurement point.
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