Brand new pump that i bought it from store and i installed myself but it makes a distinctiv noise. emerson 230 v 1 hp.

It is probably only getting 115V from your circuit which will cause it to overheat and trip the overload yet it will not draw high current which would trip the breaker. Can you confirm your line voltage with a meter? If it is suppoed to be a 230V line then look for a bad leg of power, again, checking each leg to ground using a meter.

John

For your 240 volt operation L1 and L2 will both be Hot 120volt lines.
Ground to green ground screw and bonding wire to bonding lug (if needed)

Please vote positively for this post if i have helped you.
thanks
adam

OUT THE BACK SIDE OF THE MOTOR IS A SLOT IN THE SHAFT FOR A SCREWDRIVER , SEE IF YOU CAN TURN THE MOTOR OVER(BREAKER OFF !) YOU MAY HAVE BOUND THE IMPELLER OR IT COULD BE SET FOR 230 VOLTS AND YOU ARE RUNNING IT ON 115VOLT.....
IT MAY HAVE A BAD START CAP OR THE SWITCH MIGHT NEED CLEANING. THESE EMERSON MOTORS CAN BE HARD TO WORK ON DO TO THE HUGE AMOUNT OF PLASTIC PARTS

My Sunterra pump made that noise and I had a problem getting it to come back on after unpluggin to clean pre-filter each time. It was not long after that the plastic impeller sheared in pieces (the pump was only 1 year old and thankfully under warranty) My guess is that this is fixing to happen to yours as well. You are lucky to get 5 years. There was no reason for mine to come aparts. Uunterra sent me a replacement pump which had been slightly re-designed of the same 2000 gl size and the new one jsut did the same thing (only 2 1/2 months old) I called them again which in the meantime will mean my pond going witout filtration once again. I am getting very upset about this and will be looking for a good deal on a different brand pump.

What is your line voltage to the motor; 115 or 230? The motors come out of the box at 230 if it is dual voltage and if you are connecting it to a 115 V line, it will overheat and eventually fail.

If you are connecting it to the correct line voltage and setting the motor to match; check to be sure your voltage is not dropping under load. Check both line to ground to ensure both lines are sound.

When replacing the motor, are the seals sound or have you replaced the pump seal at all? Is it leaking?

Are the motors failing electrically or mechanically?

It's sounds normal the motor will get hot. If it were overheating it should automatically shut down wait to cool off and restart.

Most pumps need to be primed. You will need to fill the the to get the flow going. Or if that can't be done you will need to find a way to pressurize the system with air, to help pus the water through the lines.

Can't be done.

It sounds like the wear ring on the impeller is hitting the diffuser. If it is new call Hayward to fix it under warrenty
Best of luck