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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

trAP

Trap Code (Internal Software Error)

Schneider Electric · Altistart 22 Soft Starter

What does trAP mean?

A low-level internal software error or exception has occurred within the soft starter's firmware. This indicates a serious internal malfunction that requires attention, often pointing to a hardware or firmware integrity issue.

Common Causes

  • Critical internal software exception or unhandled error within the soft starter's firmware.
  • Memory access violation or data corruption in the soft starter's internal memory (e.g., RAM, flash).
  • Hardware malfunction on the control board (e.g., CPU, watchdog timer, memory chip) triggering a firmware trap.
  • Severe electromagnetic interference (EMI) causing processor instability or data corruption.
  • Corrupted firmware image due to a failed update or factory defect leading to a non-recoverable error.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    1. Cycle power to the soft starter; wait a full 60 seconds before reapplying power for a complete system reset.

  2. 2

    2. Remove all external control wiring (digital inputs, analog inputs, communication cables) and power cycle; reintroduce wiring one by one to isolate potential external interference.

  3. 3

    3. Perform a factory reset via the soft starter keypad (e.g., setting P0-01 to 'Reset') to clear any potentially corrupted parameters or states.

  4. 4

    4. If accessible, check for proper grounding of the soft starter enclosure and ensure EMI filters are correctly installed and wired on the incoming line.

  5. 5

    5. Record the specific trap code displayed (if any) and contact manufacturer support with the code and soft starter serial number.

Browse all codes in this manual (32)
Verified technical data. Last updated: April 2026

Related Faults

1Modbus Function Not Recognized2Invalid Modbus Address3Invalid Modbus Value
Source: Schneider Electric Altistart 22 Soft Starter
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