Yaskawa AC Drive Z1000 HVAC - Manual (Page 8)

u Periodic Maintenance Safety
WARNING! Electrical Shock Hazard. Capacitors in the drive do not immediately discharge after shutting off the power. Wait for at least
the amount of time specified on the drive before touching any components after shutting off the power. Failure to comply may cause injury
to personnel from electrical shock.
WARNING! Burn Hazard. Because the heatsink can get very hot during operation, take proper precautions to prevent burns. When replacing
the cooling fan, shut off the power and wait at least 15 minutes to be sure that the heatsink has cooled down. Failure to comply may cause
burn injury to personnel.
u Motor Application Safety
WARNING! Electrical Shock Hazard. When a drive is running a PM motor, voltage continues to be generated at the motor terminals after
the drive is shut off while the motor coasts to stop. Take the precautions described below to prevent shock and injury:
∙ In applications where the machine can still rotate after the drive has fully stopped a load, install a switch to the drive output side to disconnect
the motor and the drive.
∙ Do not allow an external force to rotate the motor beyond the maximum allowable speed or to rotate the motor when the drive has been
shut off.
∙ Wait for at least the time specified on the warning label after opening the load switch on the output side before inspecting the drive or
performing any maintenance.
∙ Do not open and close the load switch while the motor is running.
∙ If the motor is coasting, make sure the power to the drive is turned on and the drive output has completely stopped before closing the load
switch.
NOTICE: Equipment Damage. A motor connected to a PWM drive may operate at a higher temperature than a utility-fed motor and
the operating speed range may reduce motor cooling capacity. Ensure that the motor is suitable for drive duty and/or the motor service
factor is adequate to accommodate the additional heating with the intended operating conditions.
Insulation Tolerance
NOTICE: Consider motor voltage tolerance levels and motor insulation in applications with an input voltage of over 440 V or particularly
long wiring distances.
High-Speed Operation
NOTICE: Problems may occur with the motor bearings and dynamic balance of the machine when operating a motor beyond its rated speed.
Contact the motor or machine manufacturer.
Torque Characteristics
Torque characteristics differ compared to operating the motor directly from line power. The user should have a full
understanding of the load torque characteristics for the application.
Audible Noise
The audible noise of the motor varies based on the carrier frequency setting. However, drive current derating may be required.
When using a high carrier frequency, audible noise from the motor is comparable to the motor noise generated when running
from line power.
u Receiving Safety
CAUTION
Do not carry the drive by the front cover or the terminal cover.
Failure to comply may cause the main body of the drive to fall, resulting in minor or moderate injury.
NOTICE
Observe proper electrostatic discharge procedures (ESD) when handling the drive and circuit boards.
Failure to comply may result in ESD damage to the drive circuitry.
Transporting the Drive
NOTICE: Never steam clean the drive. During transport, keep the drive from coming into contact with salts, fluorine, bromine, phthalate
ester, and other such harmful chemicals.
i.1 General Safety
8 YASKAWA ELECTRIC TOEP YAIZ1U 01A YASKAWA AC Drive – Z1000 Safety Precautions