Fagor alarm E905: RPS: Phase sequence differs between power stage and line input
DDS drive display code (seven-segment; PS/XPS/RPS power supplies) · Fagor PS/XPS/RPS
What it means
The RPS compares phase rotation sensed at the main power connector with that at the voltage line input; they do not match, which would wreck regeneration synchronization. Ensure the phase sequence at the power connector matches exactly the line input sense, referencing FIGURE H2-39 of the dds-hardware manual. Usually appears after rewiring or moving the machine.
Likely causes
- phases reversed at reconnect after service/relocation
- generator/transfer-switch installation with changed rotation
- sense wiring disturbed inside the cabinet
Need the part urgently?
Send us alarm E905 with your machine details — typical RFQ turnaround is 24–48h.