Allen-Bradley · PowerFlex 750
The drive has detected an incompatible power supply for the drive AC input rating on port 3. This can lead to improper operation or damage if not addressed.
Click steps to track your progress.
1. Measure the line-to-line voltage (VAC) and frequency (Hz) of the power supply connected to drive input terminals R3/L1, S3/L2, T3/L3 using a digital multimeter.
2. Cross-reference the measured input voltage and frequency with the required specifications for Port 3 as listed in the drive's installation manual.
3. Confirm that the drive's Port 3 input is wired for the correct phase configuration (e.g., 3-phase) matching the incoming supply.
4. Physically inspect the input power wiring at terminals R3/L1, S3/L2, T3/L3 for any loose connections, miswiring, or signs of overheating.
5. If the drive has configurable input settings for Port 3 (e.g., Parameter P0-11 for voltage range), ensure they are set correctly via the HMI or software tool.