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Alarm
Display
A.400
Alarm Name
Overvoltage
(Detected when
the servopack's
main circuit DC
voltage is 410V
or more)
(Detected when
the power to the
main circuit is
turned ON.
Situation at Alarm
occurrence
Cause
Corrective Actions
Occurred when
A servopack board fault
the control power occurred.
supply turned ON.
Replace the servopack.
Occurred when
The AC power voltage is
the main circuit
290V or more.
power supply was
turned ON.
The AC power voltage must be
within the specified range.
A servopack fault occurred.
Replace the servopack..
Occurred during Check the AC power voltage The AC power voltage must be
normal operation. (check if there is no excessive within the specified range.
voltage change.)
Occurred at
servomotor
deceleration.
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The motor speed is high and
load mass is excessive,
resulting in insufficient
regenerative capacity.
Check the load mass and minus
load specification. Reconsider the
load and operation conditions.
A servopack fault occurred.
Replace the servopack.
The motor speed is high, and
the load mass is excessive.
Reconsider the load and operation
conditions.
A01.21