GE Fuji Electric AF-300 Mini Startup Manual page 82

Possible Causes
(7) The current limiting op-
eration did not increase
the output frequency.
(8) Bias and grain set incor-
rectly
[3] The motor runs in the opposite direction to the command
Possible Causes
(1) Wiring has been
connected to the motor
incorrectly
(2) Incorrect connection
and settings for run
commands and rotation
direction command
(FWD) and (REV)
(3) The setting for the
direction of rotation via
keypad operation is
incorrect.
[4] If speed variation (such as hunting) and current fluctuation occur at regular speed
Possible Causes
(1) The frequency command
varied.
(2) An external frequency
command device was
used.
(3) The slip compensation
gain was too large.
What to Check and Suggested Measures
CHECK
Check whether the current limiting is active or not using Menu #3 "drive monitoring" and the data for the
current limiting level (F44).
SUGGESTED ACTIONS
– Change the level of the current limiting (F44) to an appropriate value.
CHECK
Decrease the value of torque boost (F09), then turn the power off and back on again and check if the speed
increases.
SUGGESTED ACTIONS
– Adjust the value of the torque boost (F09).
CHECK
Check the data for function codes F04, F05, H50, and H51 to ensure that the V/f pattern is right.
SUGGESTED ACTIONS
– Match the V/f pattern values with the motor ratings.
CHECK
Check the data of function codes F18, C50, C32, C34, C37 and C39.
SUGGESTED ACTIONS
– Set correct data values if necessary
What to Check and Suggested Measures
CHECK
Check the wiring to the motor.
SUGGESTED ACTIONS
– Connect terminals U, V, and W of the drive to the respective U, V, and W terminals of the motor.
CHECK
Check the data entered for function codes E98 and E99 and the connection to terminals [FWD] and [REV].
SUGGESTED ACTIONS
– Correct the function code data and the connection.
CHECK
Check the data for function code F02.
SUGGESTED ACTIONS
– Change the data of function code F02 to 2 (forward rotation) or 3 (reverse rotation).
What to Check and Suggested Measures
CHECK
Check the signals for the frequency command using Menu #4 "I/O checking."
SUGGESTED ACTIONS
– Increase the filter constants (C33 and C38) for the frequency command.
CHECK
Check that there is no noise in the control signal wires from external sources.
SUGGESTED ACTIONS
– Isolate the control signal wires from the main circuit wires as far as possible.
– Use shielded or twisted wires for the control signal.
CHECK
Check that the motor vibration is absorbed if the slip compensation (P09) is cancelled.
SUGGESTED ACTIONS
– Correct or cancel the slip compensation (P09) data.
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