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IM 1E7B0-02E
9-2
9. MAINTENANCE
9.2 Fuse Replacement
WARNING
This instrument must be installed by expert
engineer or skilled personnel. Fuse replacement
is not permitted for operators.
The fuse holder is located under the display which has
to be removed to allow fuse replacement. A spare fuse
is taped to the cover of the converter.
Fuse holder
CAUTION
Before replacing the fuse, make sure to turn OFF the power supply and disconnect the power source.
Use only specified fuses which should be obtained from your nearest Sales & Service Office. The use of
other fuses might cause fire. After replacing the fuse, confirm that the connecter of the display board has
not loosened.
9.3 Trouble Shooting
Although magnetic flowmeters rarely require maintenance, failures occur when the instrument is not operating
correctly. Since a failure is located by troubleshooting the receiving instrument information. This information will be
described below.
(1) No Indication
START
Check the code indication
(see Page 7-5) and examine
depending on the contents.
Contact your
agency or
the nearest
sales office.
Check that the flow tube is
filled with the liquid.
Change piping or
mouting so that the
flow tube is full of
liquid.
Inspect inside of tube by
removing.
Remove foreign matter.
Contact your agency or the
nearest sales office.
Execute either of the following.
a, Install flow tube to make
arrow agree with flow
direction.
b,
Change setting in 14 or B14
"FLOW DIR"
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
Examine the converter display or LED flashing wheather an error is displayed
Is an error displayed?
Is other display appearing?
Is the fuse blown?
Does the display reappear
by replacing the fuse?
YES
Replacing
the fuse.
Does the arrow on flow tube
agree with the flow direction?
Is the flow tube full of the liquid?
Is foreign matter sticking to
the wall?