Periodic Inspection; Inspection Of Control Equipment - Mitsubishi FREQROL-SFJ Maintenance Manual

$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.

Inspection of control equipment

1. Cooling fan
2. Soiling, de-
formation,
and terminal
screw loose-
ness
3. Miniature
relays
4. Wiring
Frequency
1. Rotate the fan shaft
Monthly
by hand to check.
2. Turn on the fan to
check that the fan
runs powerfully.
3. Check if foreign
sound occurs in bear-
ing.
Appropri- Check the components
ate in-
for cleanliness, and
terval
terminal screws for
_
looseness.
Every 3 1. Check contact points
months
for wear.
2. Check that main cir-
and closes in accor-
dance with relay op-
eration.
Appropri- Check if any wire or
ate in-
conductor is short-
terval
circuited.
Check
Remedy
Replace the
fan.
Replace de-
lay(s).