- 139 -
Deceleration time is too
short.
Increase deceleration time.
Braking unit and braking
resistor are
not installed.
Install braking unit and braking
resistor.
Over
voltage at
constant
speed
FU07
The over voltage stall
prevention
parameters are set
improperly.
Ensure that the voltage limit function
is enabled (P3-23 )
The setting of voltage limit (F3-22)
is too large. Adjust it
between 700 V
and 770 V.
The setting of frequency gain for
voltage limit (P3-24) is too small.
Adjust it between 30 and 50.
The setting of frequency rise
threshold during voltage limit (P3-
26) is too small. Adjust it between 5
Hz and 20 Hz.
An external force drives
motor during
running.
Cancel the external force or install a
braking resistor
Pre-charge
resistor
fault
FU08
Input voltage is not in
arranged range
Arrange voltage in a reasonable range
Under
voltage
FU09
Instantaneous power failure
occurs
Enable the power dip ride through
function (P9-59 ).
The AC drive's input
voltage is not
within the permissible
range.
Adjust the voltage to normal range.
The bus voltage is
abnormal.
Contact the agent
The rectifier bridge, the
buffer
resistor, the drive
board or the
control board
are abnormal.
Contact the agent
AC drive
overload
FU10
Load is too heavy or
locked-rotor
occurs on
motor.
Reduce load or check motor and
mechanical conditions.
The AC drive power class
is small.
Replace a drive of larger power
class.
Motor
overload
FU11
P9-01 (Motor overload
protection
gain) is set
improperly.
Set P9-01 correctly.
Load is too heavy or
locked-rotor
occurs on
motor.
Reduce load or check motor and
mechanical conditions.