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W7 ASD Installation and Operation Manual 9
System Setup Requirements
• When using the ASD as an integral part of a larger system, it is the responsibility of the ASD
installer or maintenance personnel to ensure that there is a fail-safe in place, i.e., an arrangement
designed to switch the system to a safe condition if there is a fault or failure.
• System safety features should be employed and designed into the integrated system in a manner
such that system operation, even in the event of system failure, will not cause harm or result in
personnel injury or system damage (i.e., E-Off, Auto-Restart settings, System Interlocks, etc.).
• The programming setup and system configuration of the ASD may allow it to start the motor
unexpectedly. A familiarity with the Auto-restart and the Remote/Local settings and function is a
requirement to use this product.
• Improperly designed or improperly installed system interlocks may render the motor unable to start
or stop on command.
• The failure of external or ancillary components may cause intermittent system operation (i.e., the
system may start the motor without warning).
• 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 to this effect must be posted
at the equipment installation site and near the driven equipment.
• If a secondary magnetic contactor (MC) is used between the ASD output 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).
• Power factor improvement capacitors or surge absorbers must not be installed on the output of the
ASD.
• 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.
• Follow all warnings and precautions and do not exceed equipment ratings.