E5

SI-T3 Watchdog Timer Error

Yaskawa · iQpump1000 AC Drive

What does E5 mean?

The SI-T3 watchdog timer has timed out, indicating that data has not been received from the PLC. This often points to a communication issue with the PLC.

Common Causes

  • Data has not been received from the PLC

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Execute DISCONNECT or ALM_CLR command

  2. 2

    Issue a CONNECT command or SYNC_SET command

  3. 3

    Proceed to phase 3 (refer to the SI-T3 Option Technical Manual for more details on troubleshooting)

Browse all codes in this manual (45)
Verified technical data. Last updated: March 2026

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