Yaskawa Z1000 AC Drive HVAC - Manual (Page 145)

4.10 Test Run with Load Connected
u Test Run with the Load Connected
After performing a no-load test run, connect the motor and proceed to run the motor and load together.
n Precautions for Connected Machinery
WARNING! Sudden Movement Hazard. Clear all personnel from the drive, motor, and machine area before applying power. System may
start unexpectedly upon application of power, causing death or serious injury.
WARNING! Sudden Movement Hazard. Always check the operation of any fast stop circuits after they are wired. Fast stop circuits are
required to provide safe and quick shutdown of the drive. Prepare to initiate an emergency stop during the test run. Operating a drive with
untested emergency circuits could result in death or serious injury.
• The motor should come to a complete stop without problems.
• Connect the load and machinery to the motor.
• Fasten all installation screws properly and check that the motor and connected machinery are held in place.
n Checklist Before Operation
• The motor should rotate in the proper direction.
• The motor should accelerate and decelerate smoothly.
n Operating the Motor under Loaded Conditions
Test run the application similarly to the no-load test procedure when connecting the machinery to the motor.
• Monitor U1-03 for overcurrent during operation.
• If the application permits running the load in the reverse direction, change the motor direction and the frequency reference
while watching for abnormal motor oscillation or vibration.
• Correct any problems that occur with hunting, oscillation, and other control-related issues.
4.10 Test Run with Load Connected
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 145
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Start-Up Programming & Operation