If a 220 volt, 3 phase motor is running backwards, what should the operator do?

When a 220 volt, 3 phase motor is running backwards, the typical and most effective solution is to switch any two of the three power leads connecting the motor. In a three-phase motor system, the direction of the magnetic field generated by the motor windings determines the rotation direction of the motor. By swapping two of these leads, the phasing of the electricity supplied to the motor is altered, which reverses the polarity of the magnetic fields and consequently changes the direction in which the motor spins.

This method of correcting motor direction is not only simple but also standard practice in the industry due to its efficiency and effectiveness. Other options present in the question do not directly address the problem of a motor running backwards. Checking the polarity magnets and checking static pressure may be relevant to other issues but will not resolve the immediate concern of reversing the motor’s direction. Similarly, returning the pump for a refund is unnecessary if the only issue is the motor's rotation direction, which can be fixed on-site without incurring additional costs.