Maintenance and Troubleshooting Azbil Corporation
5-10 Model MGG10C/14C - MagneW FLEX+/PLUS+ Converter
Troubleshooting
Overview
Introduction
If a problem occurs at Electromagnetic Flowmeter start-up and operation, the
following four causes should be considered:
• Misapplication of the electromagnetic owmeter
• Wrong setting or wrong operation
• Electromagnetic Flowmeter malfunction
• Improper wiring
If a problem occurs during operation, the device’s self-diagnostic function will
classify it as critical or non-critical. It will indicate this and respond accordingly.
Perform the proper correction measures, referring to the troubleshooting guidelines
described in this section.
Critical failures
Critical problems may disrupt Electromagnetic Flowmeter operation, if not
corrected, ultimately damage the Flowmeter. When critical 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 message and the self-
diagnostic results will be visible on the display panel.
Example:
CPU CHECK ERROR: This massage appears if the ROM or RAM is in abnormal
condition.
Non-critical failures
Non-critical problems will not seriously aect Electromagnetic Flowmeter operation.
When an error occurs during Electromagnetic Flowmeter operation and is regarded as
a non-critical problem by the converter self-diagnostics, the output will not burn-out
and the Electromagnetic Flowmeter will continue to output the measured value.
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