AS64 series AC servo drive Fault handling
-274-
4. The internal DC voltage
detection circuit of the drive
is damaged.
does not match the grid input
voltage, replace the drive.
Control power
undervoltage
The DC voltage of the drive
control circuit is higher than
the specified voltage.
1. The grid voltage is too
low.
1. Ensure the grid input voltage is
within the allowed range.
The short-time load on the
drive is too heavy, and the
temperature of the IGBT
wafer is too high.
1. Wafer temperature of the drive
IGBT is too high due to the heavy
load which exceeds the capacity
of the drive.
2. When the fault occurs,
frequent power-off and restart
shall be prohibited, and you need
to ensure that the interval of
restarting is more than two
minutes after sufficient cooling is
conducted.
The drive load is too heavy.
1. The drive is overloaded due to
heavy load.
2. Ensure there is no phase
dislocation or phase loss to the
UVW wiring of the motor and the
encoder is correct.
1. Run above the rated
torque for a long time.
2. Run at the maximum
torque for a short time, the
motor load is too heavy, the
motor is stuck or locked-
rotor, the motor is stuck, and
the electromagnetic brake is
not released (fault recording
characteristics: the output
current is the max. value,
and the output voltage is far
1. Unreasonable selection.
Reselect the driver or motor.
2. The short-time load is too
heavy. Ensure that the load is not
too heavy, the motor is not stuck
or locked-rotor, and the
electromagnetic brake is opened.
3. Ensure there is no phase
dislocation or phase loss to the
UVW wiring of the motor, the plug
is tightened, and the power
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