This usually indicates the voltage selector is set incorrectly or the start capacitor has failed.
Newer Century motors often come factory-set to 230V . If you have a 115V system, you must reconfigure the internal wiring, or you will burn the motor out instantly. century pool pump wiring diagram
If you are running 115V, you will have one hot wire (black) and one neutral wire (white). Connect the black wire to . This usually indicates the voltage selector is set
This guide explains common wiring patterns but cannot replace the actual diagram glued to your specific motor. Always defer to the manufacturer’s original document. If you are running 115V, you will have
| Problem | What to check on diagram | |--------|--------------------------| | Motor hums but won’t start | Start capacitor circuit (check C + S terminals) | | Trips breaker instantly | L1/L2 shorted to ground – inspect diagram for grounding point | | Low speed same as high | Speed switch wired wrong (L1 bypassing low-speed winding) | | Pump runs backwards | For single-phase? Not possible unless centrifugal switch stuck – check diagram for start winding orientation |