8
G7 ASD Operation Manual
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Improperly designed or improperly installed system interlocks may render the motor unable to start
or stop on command.
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The failure of external or ancillary components may cause intermittent system operation, i.e., the
system may start the motor without warning.
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There may be thermal or physical properties, or ancillary devices integrated into the overall system
that may allow for the ASD to start the motor without warning. Signs at the equipment installation
must be posted to this effect.
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If a secondary magnetic contactor (MC) is used between the ASD and the load, it should be
interlocked to halt the ASD before the secondary contact opens. If the output contactor is used for
bypass operation, it must be interlocked such that commercial power is never applied to the ASD
output terminals (U, V, W).
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Power factor improvement capacitors or surge absorbers must not be installed on the output of the
ASD.
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Use of the built-in system protective features is highly recommended (i.e., E-Off, Overload
Protection, etc.).
•
The operating controls and system status indicators should be clearly readable and positioned
where the operator can see them without obstruction.
•
Additional warnings and notifications shall be posted at the equipment installation location as
deemed required by Qualified Personnel.
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Follow all warnings and precautions and do not exceed equipment ratings.
Operational and Maintenance Precautions
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Turn off, lockout, and tagout the main power, the control power, and instrumentation connections
before inspecting or servicing the drive, or opening the door of the enclosure.
•
Turn off, lockout, and tagout the main power, the control power, and instrumentation connections
before proceeding to disconnect or connect the power wiring to the equipment.
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The capacitors of the ASD maintain a residual charge for a period of time after turning the ASD off.
The required time for each ASD typeform is indicated with a cabinet label and a Charge LED.
Wait for at least the minimum time indicated on the enclosure-mounted label and ensure that the
Charge LED has gone out before opening the door of the ASD once the ASD power has been
turned off.
•
Turn the power on only after attaching (or closing) the front cover and Do Not remove the front
cover of the ASD when the power is on.
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Do Not attempt to disassemble, modify, or repair the ASD. Call your Toshiba sales representative
for repair information.
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Do not place any objects inside of the ASD.
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If the ASD should emit smoke or an unusual odor or sound, turn the power off immediately.
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The heat sink and other components may become extremely hot to the touch. Allow the unit to cool
before coming in contact with these items.
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Remove power from the ASD during extended periods of non-use.
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The system should be inspected periodically for damaged or improperly functioning parts,
cleanliness, and to ensure that the connectors are tightened securely.
WARNING
