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FC-21 Flow Computer
13. Diagnosis and Troubleshooting
13.1 Response of FC-21 on Error or Alarm:
TYPE OF ERROR DESCRIPTION
Sensor/Process Alarms Errors detected due to sensor
failure or process alarm
conditions
Self Test Errors Errors detected during self test.
System Alarms Errors detected due to system
failure
Error and warning indications which occur during operation are indicated
in the RUN mode alternately with the measured values. The FC-21
Flow Computer has three types of error:
Some alarms are self clearing. Other alarms require the user to
acknowledge and clear the alarm. Press the ENTER button to
acknowledged and clear alarms. Alarms may reassert themselves if
the alarm condition is still present.
NOTE: A historical error alarm log is available in the "Test Mode".
The following descriptions suggest possible causes and corrective
actions for each alarm message.