Yaskawa Z1000U HVAC Matrix Bypass - Manual (Page 52)

Geared Motor
Make sure that the gear and the lubricant are rated for the desired speed range to avoid gear damage when operating at low
speeds or very high speeds. Consult with the manufacturer for applications that require operation outside the rated speed range
of the motor or gear box.
Single-Phase Motor
Variable speed drives are not designed to operate with single phase motors. Using capacitors to start the motor causes excessive
current to flow and can damage drive components. A split-phase start or a repulsion start can burn out the starter coils because
the internal centrifugal switch is not activated. The drive is for use with three-phase motors only.
Motor with Brake
Take caution when using the drive to operate a motor with a built-in holding brake. If the brake is connected to the output side
of the drive, it may not release at start due to low voltage levels, so be sure to install a separate power supply for the motor
brake. Note that motors with built-in brakes tend to generate a fair amount of noise when running at low speeds.
u Drive Label Warning Example
Always heed the warning information listed in Figure i.1 .
WARNING
Read manual before installing.
Wait 5 minutes for capacitor
discharge after disconnecting
power supply.
To conform to requirements,
make sure to ground the supply
neutral for 400V class.
After disconnecting from power
supply,please wait 5 minutes
before inspecting, performing
maintenance or wiring the
converter.
Risk of electric shock.
Hot Surfaces
Wait 5 minutes or longer
until the unit has cooled.
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Figure i.1 Warning Information Example and Position
i.2 General Safety
52 YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual