Endress+Hauser CM14 - Calibrating the Cell Constant; Maintenance and Accessories; Maintenance Requirements

CM14 Troubleshooting
29
Diagnostics
code
Message text Description
F100 Sensor comm.
No sensor communication.
Possible reasons:
• No sensor connection
• Faulty sensor connection
• Short-circuit in the sensor cable
• Short-circuit in the neighboring channel
• Sensor firmware update canceled with an error
Remedy:
• Check sensor cable connection
• Check sensor cable for short-circuit
• Replace sensor
• Restart firmware update
• Contact service
F118 Glass crack
Sensor glass breakage alarm.
Impedance of glass membrane too low.
Remedy:
• Inspect glass electrode for hair-line cracks and breakage
• Check the medium temperature
• Check the electrode plug-in head for moisture and dry if necessary
• Replace sensor
F120 Sensor ref.
Sensor reference alarm.
Impedance of reference too low.
Remedy:
• Inspect glass electrode for hair-line cracks and breakage
• Check the medium temperature
• Check the electrode plug-in head for moisture and dry if necessary
• Replace sensor
F124 Sensor glass
Alarm, sensor glass limit value exceeded.
Impedance of glass membrane too high.
Remedy:
• Check pH sensor, replace if necessary
• Check glass limit value and correct if necessary
• Replace sensor
F142 Sensor signal
Sensor check.
No conductivity display.
Possible reasons:
• Sensor in air
• Sensor defective
Remedy:
• Check sensor installation
• Replace sensor
F143 Self test
Sensor self-test error.
Remedy:
• Replace sensor
• Contact service
F845 Device id Faulty hardware configuration