4.10 Operation Check
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4.10 Operation Check
After completion of preparations for a test run as described above, start running the inverter for motor operation
check using the following procedure.
If the user configures the function codes wrongly without completely understanding this User's Manual, the
motor may rotate with a torque or at a speed not permitted for the machine.
Failure to observe this could result in an accident or injury.
If any abnormality is found in the inverter or motor, immediately stop operation and investigate the cause
referring to Chapter 6 “TROUBLESHOOTING.”
4.10.1 Test run procedure
If set at "4.9 Setting function codes when switching from a conventional model”, operation may start at the
predetermined high frequency when the power is turned ON, and therefore it is recommended that the initial test
run be performed at a low frequency.
The method used to set the factory default frequency from the keypad, and the test run method with run command
entered is shown below.
(1) Turn the power ON and check that the reference frequency 0.00 is blinking on the LED monitor.
(2) Set a low reference frequency such as 5 Hz, using / keys.
(Check that the frequency is blinking on the LED monitor.)
(3) Press the key to start running the motor in the forward direction.
(Check that the reference frequency is lit on the LED monitor.)
(4) To stop the motor, press the key.
4.10.2 Check points during a test run
(1) Check that the motor is running in the forward direction.
(2) Check for smooth rotation without motor humming or excessive vibration.
(3) Check for smooth acceleration and deceleration.
When no abnormality is found, press the key again to start driving the motor, then increase the reference
frequency using / keys. Check the above points again.
Depending on the settings of function codes, the motor speed may rise to an unexpectedly high and
dangerous level, particularly, under vector control with sensor. To avoid such an event, the speed limiting
function is provided.
If the user is unfamiliar with the function code settings (e.g., when the user starts up the inverter for the
first time), it is recommended that the “F15: Frequency limiter (Upper limit)” and the torque control “d32:
Speed limit 1” and “d33: Speed limit 2” are used. At the startup of the inverter, to ensure safer operation,
specify small values to those function codes at first and gradually increase them while checking the actual
operation.
The speed limiting function serves as an overspeed level barrier, or as a speed limiter under torque
control.
For details on the speed limiting function, refer to Chapter 5 “FUNCTION CODES”.
If performing sensorless vector control (synchronous motors) and P30* is set to other than “0”, noise that
may occur from the motor at the start of running can be regarded as normal.
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