11 Inspection and Mainetenance NICE3000
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User Manual
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Chapter 11 Inspection and Mainetenance
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Safety Information
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To Prevent Electric Shock
● Never perform wiring at power-on. Cut off all power supplies and wait for at least ten minutes so that the
residual voltage on capacitors can discharge safely. Wait at least the required interval before power-on
again.
● Never modify wiring, disconnect the cable, remove the optional board or replace the cooling fan while the
controller is running.
● Make sure to connect the grounding terminal of the motor to ground. Otherwise, you will suffer electric
shock when touching the motor housing.
● Installation, wiring, commissioning, inspection & maintenance, and component replacement must be
performed only by qualied technicians.
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To Prevent Fire
● NEVER run the controller with the protective cover removed.
● The drawings in the manual are sometimes shown without covers or protective guards. Remember to
install the covers or protective guards as specied rst, and then perform operations in accordance with
the instructions.
● Tighten all terminal screws based on the specied tightening torque.
● This is to prevent cable connection from overheating after becoming loose.
● Never misconnect the main circuit.
● This is to ensure that the input voltage is within the allowable range. Incorrect power voltage of the main
circuit may result in a re.
● Keep ammable materials far away from the controller or mount the controller on incombustible surfaces
such as a metal wall.
● Replace the cooling fan in correct ways as specied in this chapter.
● Ensure the correct air outlet direction of the fan. Incorrect direction will weaken the cooling effect.
● Never install or remove the motor while the controller is running. Failure to comply may result in electric
shock and damage to the controller.
● Use shielded cables for control circuit wiring. Meanwhile, connect the shield to ground reliably at one end
to prevent controller malfunction.
● Never modify the controller circuit. Failure to comply will damage the controller.
● Make sure to connect the controller output terminals to the motor terminals correctly.
● If it is necessary to change the motor rotation direction, exchange any two of the controller U, V, W cables.
● Never operate the controller that has been damaged.
● This is to prevent further damage to external equipment.
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