Azbil mF CMG Series, User Manual

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35
Chapter 6. MAINTENANCE AND
TROUBLESHOOTING
„ Remedying trouble
When trouble occurs, refer to the following table:
Problem Remedy
Nothing is displayed. • Make sure that the power supply voltage and polarity are correct.
• Check the connectors connecting the display to the sensor/terminal sec-
tion for disconnection or faulty contact.
• Check the fuse to see if it has blown. If so replace it. For details on how to
replace the fuse, see the next item „ How to replace the fuse.
Err1
is displayed
alternately with the
flow rate value.
• Check the connectors connecting the display to the sensor/terminal sec-
tion for disconnection and faulty contact.
• If the connectors are free of abnormalities, a probable cause is sensor
error. Contact the azbil Group as repair by Azbil Corporation is necessary.
Err2
is displayed
alternately with the
flow rate value.
• The probable cause is an error in the memory, which is individually
adjusted for each sensor.
Err2
is displayed, but the operation contin-
ues with provisional data in spite of the error. Readjustment by Azbil
Corporation is necessary.
The display is other
than
0.00
. (includ-
ing a minus display)
even though the
instantaneous flow
rate should be zero.
Check the shut-off valve and piping for any leaks. If the valve and pip-
ing are free of leaks, a probable cause is that the device's characteristics
have changed. Contact the azbil Group as repair by Azbil Corporation is
necessary.
A minus is displayed
for the instantaneous
flow rate. Make sure that the arrow marked on the flow path matches the direction of
gas flow. Correct the directions if it is reversed.
Indicated flow rate
varies significantly. • Check that the straight pipe section is long enough.
• If the problem seems to be foreign matter stuck to the sensor or the
effects of a pulsating flow, Contact the azbil Group.
Handling Precautions
•
Err2
(memory error) indicates that the individual adjustment data
for the flowmeter's internal sensor has been lost. Accuracy cannot
be guaranteed if use of the flowmeter is continued in this state.
Ask for repair.