Allen-Bradley · PowerFlex 750
The drive has detected an incompatible power supply for the drive AC input rating on port 1. This can lead to improper operation or damage if not addressed.
Click steps to track your progress.
1. Measure the actual line-to-line voltage (VAC) and frequency (Hz) of the power supply connected to drive input terminals R1/L1, S1/L2, T1/L3 using a multimeter.
2. Compare the measured supply voltage and frequency to the drive's specified input ratings found on its nameplate or documentation for Port 1.
3. Verify the number of phases (single or three-phase) of the incoming supply matches the drive's configuration for Port 1 (e.g., Parameter P0-10 for input phase type).
4. Inspect the wiring connections at drive input terminals R1/L1, S1/L2, T1/L3 for correct phase rotation and secure termination.
5. If a step-down or isolation transformer is used, verify its output voltage and kVA rating are compatible with the drive's Port 1 requirements.