Alarm Display: A. 410. Alarm Name: Undervoltage on Sony SI-F209

Alarm Display: A. 410

Alarm Name: Undervoltage

1. Situation at Alarm Occurrence: Occurred when the control power supply was turned ON.

Cause: A SERVOPACK board fault occurred.
Corrective Actions: Replace the SERVOPACK.

2. Situation at Alarm Occurrence: Occurred when the main circuit power supply was turned ON.

Cause: The AC power supply voltage is 120 V or less.
Corrective Actions: The AC power supply voltage must be within the specified range.

Cause: The fuse of the SERVOPACK is blown out.
Corrective Actions: Replace the SERVOPACK.

Cause: The inrush current limit resistor is disconnected, and result in an abnormal power supply voltage or in an overload of the inrush current limit resistor.
Corrective Actions: Replace the SERVOPACK. (Check the power supply voltage, and reduce the number of times that the main circuit is turned ON or OFF.)

Cause: A SERVOPACK fault occurred.
Corrective Actions: Replace the SERVOPACK.

3. Situation at Alarm Occurrence: Occurred during normal operation.

Cause: The AC power supply voltage was lowered, and large voltage drop occurred.
Corrective Actions: The AC power supply voltage must be within the specified range.

Cause: A temporary power failure occurred.
Corrective Actions: Clear and reset the alarm, and restart the operation.

Cause: The servomotor cable shorts to ground.
Corrective Actions: Repair or replace the servomotor cable.

Cause: The servomotor shorts to ground.
Corrective Actions: Replace the servomotor.

Cause: A SERVOPACK fault occurred.
Corrective Actions: Replace the SERVOPACK.

Written by: SMTBOX Editorial & Engineering Team

Our editorial team consists of senior SREs, mechanical engineers, and SMT assembly specialists with over 15 years of industry experience in PCB assembly line optimization. All technical articles are reviewed and verified for mechanical and electronic compatibility before publication.