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8-22
8-3 Maintenance and Inspection
H Cautions and Warnings
WARNING Do not touch the Inverter terminals while the power is being supplied.
WARNING Maintenance or inspection must be performed only after turning OFF the power
supply, confirming that the CHARGE indicator (or
status indicators) is turned OFF
,
and
after waiting for the time specified on the front cover
. Not doing so may result in
electrical shock.
WARNING Maintenance, inspection, or parts replacement must be performed by authorized
personnel. Not doing so may result in electrical shock or injury.
WARNING Do not attempt to take the Unit apart or repair. Doing either of these may result in
electrical shock or injury.
Caution Carefully handle the Inverter because it uses semiconductor elements. Careless
handling may result in malfunction.
Caution Do not change wiring, disconnect connectors, the Operator, or optional items, or
replace
fans while power is being supplied. Doing so may result in injury
, damage to
the product, or malfunction.
D Daily Inspection
Check the following items with the system in operation.
S The motor should not be vibrating or making unusual noises.
S There should be no abnormal heat generation.
S The ambient temperature should not be too high.
S The output current value shown on the monitor display should not be higher than normal.
S The cooling fan on the bottom of the Inverter should be operating normally.
D Periodic Inspection
Check the following items during periodic maintenance. Before beginning inspection, be sure to
turn
of
f the power supply
. Confirm that the LED indicators on the front panel have all turned OFF
, and
then
wait until at least one minute (or at least three minutes for 30 kW or more) has elapsed before
beginning
the inspection. Be sure not
to touch terminals right after the power has been turned of
f.
Doing so can result in electric shock.
S Terminal screws should not be loose.
S There should be no conductive dust or oil mist on the terminal block or inside the Inverter.
S The Inverter’s mounting screws should not be loose.
Maintenance Operations Chapter
8
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