E1 Series Servo Drive User Manual Troubleshooting And Maintenance
13-8 HIWIN MIKROSYSTEM CORP.
Alarm Number And
Alarm Name
Cause Confirmation Method Corrective Action
the ground and U, V and W
phases.
There is short circuit or
ground fault in the motor.
circuit among the U, V and
W terminals, or between the
ground and U, V and W
terminals. Or check if an
error occurs in the
insulation resistance of the
Replace the motor.
There is short circuit or
ground fault in the servo
drive.
circuit among the U, V and
W terminals, or between the
ground and U, V and W
terminals. Or check if the
power transistor of the
servo drive is burned out.
Replace the servo drive.
regenerative resistor is
incorrect or the connection
Check if the wiring is
correct.
Correct the wiring.
The dynamic brake is
frequently used.
frequency of the dynamic
brake by the power
consumption of the dynamic
Replace the servo drive and
adjust the operating condition
and load to decrease the
operating frequency of the
The regenerative energy
exceeds the processing
capability of the servo drive.
Check the operating
frequency of the
regenerative resistor.
Decrease the acceleration,
deceleration and load. Or
evaluate if external
regenerative resistor is
The resistance of the
external regenerative
resistor is too small.
Check the operating
frequency of the
regenerative resistor.
regenerative resistor. Its
resistance must be higher than
the minimum resistance that
Heavy load is applied to the
servo motor when it stops
or operates at low speed.
condition exceeds the
specification of the servo
Reduce the load or operate at
higher speed.
False operation occurs due
to noise interference.
Improve the wiring or
reduce the interference
source and monitor if the
error occurs again.
Apply countermeasures for
electromagnetic interference.
For instance, wiring for frame
ground (FG) must be correctly
performed by using the cables
which conform to the specified
Servo drive malfunction N/A Replace the servo drive.
AL.320
Regenerative energy
overflow
The power supply voltage is
not within the specified
Check if the power supply
voltage is normal.
Use the power supply voltage
within the specified range.
external regenerative
resistor is too low or its
capacity is insufficient. Or
the motor is in regenerating
state for a period of time.
Check the operating
condition or the capacity of
the external regenerative
resistor.
Adjust the operating condition
or replace the external
regenerative resistor.
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