7 Routine Inspection and Maintenance
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7 Routine Inspection and Maintenance
7.1 Routine Inspection
Safety Information
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Do not connect or disconnect wiring while the power is on.
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Before the inspection, disconnect all power supply. After disconnect the power of
the drive, as there is residual voltage in the DC capacitor in the drive, wait for sev-
eral minutes until the the power indicator is off. Before powering on the drive again
for operation, wait for an interval specied by the drive.
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Do not modify or disconnect wiring, remove optional extension card or replace the
cooling fan while the power is on.
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Make sure to connect the motor-side grounding terminal. Failure to comply may
result in electric shock due to touching motor housing.
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Do not allow unqualied personnel to do the repair & maintenance work.
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Installation, wiring, commissioning, repair & maintenance, and component replace-
ment must be performed only by qualied technicians.
Warning
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Do not run the AC drive with front cover removed.
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Drawings in the manual are sometimes shown without covers or protective guards
to display the details. Remember to install the covers or protective guards as spec-
ied rst, and then perform operations in accordance with instructions.
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Tighten all terminal screws based on specied tightening torque.
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Ensure that input voltage is within permissible range. Incorrect input voltage of
main circuit may result in abnormal running.
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Keep combustible materials far away from the AC drive or mount the AC drive on
incombustible surfaces such as a metal wall.
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Replace the cooling fan in correct ways as specied in this chapter. Ensure correct
air outlet direction of the fan. Incorrect air direction will diminish the cooling ef-
fects.
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Do not connect or disconnect motor while the drive is running. Failure to comply
may result in electric shock and damage to the AC drive.
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Use shielded cables for control circuit wiring.
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Meanwhile, ground the shield to the grounding terminal reliably.
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Do not modify the drive circuitry. Failure to comply will damage the AC drive.
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Make sure to connect the output terminals of the AC drive and the motor terminals
correctly.
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If it is necessary to change the motor rotation direction, exchange any two of UVW
cables of the AC drive.
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Do not operate the AC drive that has been damaged. This is to prevent further
damage to external equipments.
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