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$9. PERIODIC INSPECTION
In order to ensure high-performance operation of equipment,
and trouble-free long use of equipment, the periodic inspec-
tion is particularly important.
CAUTION: To prevent accident,
make sure the power is inter-
rupted completely before starting the inspection.
9.1
Inspection of control equipment
Frequency
Check
Remedy
1. Cooling fan
Monthly
1. Rotate the fan shaft
Replace the
by hand to check.
fan.
2. Turn on the fan to
check that the fan
runs powerfully.
3. Check if foreign
sound occurs in bear-
ing.
2. Soiling,
de-
Appropri-
Check the components
formation,
ate in-
terval
for cleanliness, and
and terminal
terminal screws for
screw loose-
_
looseness.
ness
3. Miniature
relays
Every 3
1. Check contact points
Replace
de-
months
for wear.
fective
re-
2. Check that main
cir-
lay(s).
cuit
contactor opens
and closes in accor-
dance with relay op-
eration.
4. Wiring
Appropri-
Check if any wire or
ate in-
terval
conductor is
short-
circuited.
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