Alarm Display: A.860. Alarm Name: Encoder Overheated on Sony SI-F209 Electronic Part Mounter

Troubleshooting Summary:

Having issues with Alarm Display: A.860. Alarm Name: Encoder Overheated on Sony SI-F209 Electronic Part Mounter? Read our step-by-step SMT maintenance solution below. If you require replacement feeders, nozzles, or sensors, contact SMTBOX for OEM-compatible parts.

Alarm Display: A.860

Alarm Name: Encoder Overheated

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

Cause: An encoder fault occurred.
Corrective Actions: Replace the servo motor.

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

2. Situation at Alarm Occurrence: Occurred during operation.

Cause: The ambient temperature around the servomotor is too high.
Corrective Actions: The ambient temperature must be 40-degrees centigrade or less.

Cause: The servo motor load is greater than the rated load.
Corrective Actions: The servomotor load must be within the specified range.

Cause: An encoder fault occurred.
Corrective Actions: Replace the servo motor.

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

SMTBOX Editorial & Engineering Team
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.

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