Yamatake MagneW3000 PLUS, User Manual

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5-2 Troubleshooting
Overview
Introduction
If a problem occurs at electromagnetic flowmeter start-up and operation, the
following three causes should be considered.
Inconsistency between the electromagnetic flowmeter’s specifications and
the actual operating conditions
Missetting or misoperation
Electromagnetic flowmeter malfunction
If a problem occurs during electromagnetic operation, the converter’s self-
diagnostic function will classify it as serious or minor. It will indicate this and
respond accordingly.
Perform the proper correction measures, referring to the troubleshooting
guidelines described in this section.
Serious trouble
Serious problems may obstruct electromagnetic flowmeter operation and fi-
nally damage the flowmeter, if not corrected. When serious trouble occurs
during electromagnetic flowmeter operation, an error message will appear on
the converter’s display panel and the flowmeter will continue to output the
preset value in the abnormality treatment (fail-safe) direction. The error mes-
sage and the self-diagnostic results will be visible on the display panel or
using the S-SFC’s STAT (diagnosis) key.
Example:
EX CHECK ERROR: This message appears if the detector coil has been
disconnected.
Minor trouble
Minor problems will not seriously obstruct electromagnetic flowmeter opera-
tion. When an error occurs during electromagnetic flowmeter operation and
is regarded as a minor problem by the converter self-diagnostics, the output
will not burn out and the electromagnetic flowmeter will continue to output
the instantaneous flow rate.