6-5
Possible Causes What to Check and Suggested Measures
(9) In the torque control
mode, the output
frequency does not
increase.
Check whether data of torque limiter related function codes (F40,
F41, E16 and E17) is correctly configured and the torque limit
switching signal TL2/TL1 is correct.
Î Reconfigure data of F40, F41, E16 and E17 correctly or reset it to
the factory default.
Î Switch correctly the torque switching terminal command
TL2/TL1.
(10) Bias and gain set
incorrectly.
Check the data of function codes F18, C50, C32, C34, C37, C39,
C42, and C44.
Î Readjust the bias and gain to appropriate values.
[ 3 ] The motor runs in the opposite direction to the command.
Possible Causes What to Check and Suggested Measures
(1) Wiring has been
connected to the motor
incorrectly.
Check the wiring to the motor.
Î Connect terminals U, V, and W of the inverter to the respective U,
V, and W terminals of the motor.
(2) Incorrect connection
and settings for run
commands and rotation
direction command
FWD and REV
Check the data of function codes E98 and E99 and the connection
to terminals [FWD] and [REV].
Î Correct the data of the function codes and the connection.
(3) The setting for the
rotation direction via
keypad operation is
incorrect.
Check the data of function code F02 (Run command).
Î Change the data of function code F02 to "2:
/ keys on
keypad (forward)" or "3:
/
keys on keypad (reverse)."
[ 4 ] If the speed variation and current vibration (such as hunting) occur at the constant
speed
Possible Causes What to Check and Suggested Measures
(1) The frequency
command fluctuated.
Check the signals for the frequency command with Menu #4 "I/O
Checking" using the keypad.
Î Increase the filter constants (C33, C38, and C43) for the
frequency command.
Check that there is no noise in the control signal wires from external
sources.
Î Isolate the control signal wires from the main circuit wires as fa
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