Toshiba VF-AS1 Error Code E29

Toshiba PLC & VFD Major External

Model: VF-AS1 | Code: E29

Applicable Systems
VF-AS1

Symptoms

The VF-AS1 reports an external alarm input activation. An external fault signal was received, causing the drive to trip.

Possible Causes

  • External safety device triggered the alarm input
  • External alarm wiring fault causing false trigger
  • External alarm contact configured for the wrong logic level

Troubleshooting Steps

  1. Step 1: Check the external alarm source and verify the safety device status
    External alarm source identified
  2. Step 2: Verify the alarm input wiring and contact configuration
    Wiring is correct and logic matches configuration
  3. Step 3: Clear the external alarm and reset the drive
    External alarm is cleared and drive restarts

How to Reset

To reset: Clear the external alarm condition, then reset the fault.

Related Toshiba Fault Codes

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Source: Toshiba VF-AS1 Inverter Manual, Toshiba Mitsubishi-Electric Industrial Systems

Category: PLC & VFD

Published: 2026-11-03