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
Execute DISCONNECT or ALM_CLR command
- 2
Issue a CONNECT command or SYNC_SET command
- 3
Proceed to phase 3 (refer to the SI-T3 Option Technical Manual for more details on troubleshooting)
Verified technical data. Last updated: March 2026
Related Faults
Source: Yaskawa iQpump1000 AC Drive