Hitachi WJ Series User Manual page 137

Chapter 8
 Countermeasure when auto-tuning fails halfway
!
 If an abnormal termination or trip occurs and forced termination occurs during auto-tuning,
refer to the following table and "Chapter 15 Tips/FAQ/Troubleshooting" to remove the
abnormal termination or trip factor. Then, set [H001] to 01 or 02 again and perform auto-tuning
again.
Possible causes
The control system does not match
the motor.
The base frequency, motor rated
voltage, and motor rated current do
not match the motor specifications.
The STOP/RESET key was pressed.
Trip occurred due to external
factors such as brake.
The input terminal function was
activated.
The motor capacity is too small
against the applicable motor
capacity of the inverter.
An overvoltage error [E07] occurred
because the machine load was
large or the deceleration time was
short.
An "Overcurrent error ([E01] to
[E03])" occurred during
acceleration or deceleration due to
a large load.
Mandatory Setting for Motor Drive and Test Run
Set "Control mode selection, 1st-motor [A044]" to "V/f
Constant torque characteristics (00)". Otherwise, it may
terminate abnormally.
If the basic parameters of the motor are not correct, trip
such as overcurrent may occur. Check and set the basic
parameters.
Also, set so that "Output voltage gain [A045]" × "Motor
rated voltage [A082]" equals to the rated voltage of the
motor.
If the STOP/RESET key on the keypad is pressed, auto-
tuning is interrupted. Check the auto-tuning setting again
and execute.
The cause of the trip must be removed.
During auto-tuning, if the input terminal function
operates, tuning may be hindered. Execute auto-tuning
after confirming the input terminal functions are OFF.
If the tuning is not completed properly, the motor
constants must be set manually.
Increase the deceleration time.
Perform auto-tuning with a motor alone.
Increase the acceleration time.
8-3-4
Example of countermeasures