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Fuji Machinery FW3200 fault A.85: Servo drive: Encoder over speed — meaning and fix

Independent resource, not affiliated with Fuji Machinery. Source: manufacturer documentation, p. 148.

What A.85 means

Encoder over speed.

Shown as

  • Alarm A.85 at power-on

Likely causes, ranked

  1. Encoder rotating at high speed when power turned onmost likely

Is there a fix in the documentation?

The manufacturer's documentation lists this alarm and its meaning but gives no remedy.

Note the alarm and anything shown on the drive display, clear it as the documentation describes, and contact the manufacturer's service desk if it returns.

Safety

Follow your site's lockout procedures before working on the machine. This page does not replace the manufacturer's service.

Related codes

  • A.02 · Parameter failure
  • A.03 · Main circuit detection failure
  • A.04 · Parameter out of range
  • A.05 · Motor and servopack mismatch
  • A.7A · Heat sink overheat
  • A.10 · Over current

Every Fuji Machinery FW3200 fault code

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Questions

What does A.85 mean on a Fuji Machinery FW3200?
Encoder over speed. Shown as: Alarm A.85 at power-on.
What causes A.85 on the Fuji Machinery FW3200?
Encoder rotating at high speed when power turned on (most likely).
Is there a fix for A.85 in the manual?
The manufacturer's documentation lists this alarm and its meaning but gives no remedy. Note the alarm and anything shown on the drive display, clear it as the documentation describes, and contact the manufacturer's service desk if it returns.
Is it safe to fix A.85 myself?
Follow your site's lockout procedures before working on the machine. This page does not replace the manufacturer's service.

Independent resource, not affiliated with Fuji Machinery. Source: manufacturer documentation, p. 148. Structured paraphrase; no manual text is reproduced.