LinefixedFault-code library

Fuji Machinery FW3200 fault E74: Servo drive: Bus OverCurrent — meaning and fix

Independent resource, not affiliated with Fuji Machinery. Source: manufacturer documentation, p. 99.

What E74 means

Bus OverCurrent.

Shown as

  • DC link current exceeds rating

Likely causes, ranked

  1. Motor or transmission malfunctionlikely
  2. IAM not properly sizedlikely

Quick checks

  • Check for proper motor sizing

    Expected: Motor sized properly

  • Check for proper IAM sizing

    Expected: IAM sized properly

Fix

Corrective actionslockout

  1. Check/replace transmission device
  2. Check/replace motor
  3. Install larger kW rated IAM

Safety

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

Related codes

  • E04 · Motor Overtemp
  • E05 · Drive Overcurrent (Power Fault)
  • E36 · Drive Overtemp (System Overtemperature)
  • E37 · Power Phase Loss
  • E39 · Self Sense Fault
  • E43 · Drive Enable Fault

Every Fuji Machinery FW3200 fault code

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Questions

What does E74 mean on a Fuji Machinery FW3200?
Bus OverCurrent. Shown as: DC link current exceeds rating.
What causes E74 on the Fuji Machinery FW3200?
Motor or transmission malfunction (likely); IAM not properly sized (likely).
How do I fix E74 on the Fuji Machinery FW3200?
First check: Check for proper motor sizing (expected: Motor sized properly); Check for proper IAM sizing (expected: IAM sized properly). Corrective actions: 1) Check/replace transmission device 2) Check/replace motor 3) Install larger kW rated IAM Lock out the machine first.
Is it safe to fix E74 myself?
Follow your site's lockout procedures before working on the machine. This page does not replace the manufacturer's service. At least one fix here needs the machine locked out and isolated first.

Independent resource, not affiliated with Fuji Machinery. Source: manufacturer documentation, p. 99. Structured paraphrase; no manual text is reproduced.