Pump will not start at all, no display or lights on Hayward variable-speed pump.

Safety first: Before touching wiring, turn off the main breaker feeding the pool equipment.

• Check breaker: Locate the breaker labeled for the pool pump and ensure it is in the ON position. Reset if tripped; if it trips again immediately, do not force it—investigate further.
• Inspect external disconnects: Some installations have a local disconnect or timer. Make sure any switches are ON and timers are not in the OFF position.
• Verify voltage at pump: With a multimeter and appropriate safety precautions, confirm that rated voltage is present at the pump’s terminal block.
• Check wiring connections: With power off, remove the electrical cover on the pump and ensure all wires are secure and not burned.
• Internal failure: If correct voltage is present but the display remains dead, the internal low-voltage power supply or drive board has likely failed and must be replaced.