Code Er-01: Motor Data Error
Issue Description & Safety Warning
The Yaskawa A1000 AC Drive has triggered a critical Motor Data Error alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Code type: Auto-tuning fault/alarm Manual section: Yaskawa A1000 Troubleshooting Motor data or data entered during Auto-Tuning was incorrect. - Check that the motor data entered to T1 parameters matches motor nameplate input before Auto-Tuning. - Start Auto-Tuning over again and enter the correct information. Motor output power and motor-rated current settings (T1-02 and T1-04) do not match. - Check the drive and motor capacities. - Correct the settings of parameters T1-02 and T1-04. Motor rated current and detected no-load current are not consistent with another. - Check the motor rated current and no-load current. - Correct the settings of parameters T1-04 and E2-03. Base frequency and motor rated speed (T1-05 and T1-07) do not match. - Set T1-05 and T1-07 to the correct value. - Check if the correct pole number was entered to T1-06.
Source: Yaskawa AC Drive A1000 High Performance Vector Control Drive Technical Manual (SIEP C710616 21H)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Yaskawa A1000 AC Drive Alarms
Yaskawa controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code Er-01 on the A1000 AC Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Yaskawa's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 280 Yaskawa A1000 AC Drive codes.
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