Sun Pumps SCP 39-18-75 LC - Manual (Page 7)

TROUBLE SHOOTING
If pump looses prime, or if too many bubbles come through return line, check:
1.) Hair and lint pot cover is tight and O-ring is in place and free from defects.
2.) Valves on suction and return lines are working properly and open
3.) Water level in pool is too low.
4.) Filter O-ring or gasket is in place and free from defects.
5.) All fittings and connections are secure and air tight.
Not pumping water, check:
1.) Filter pressure gauge reading too high, indicating filter needs cleaning.
2.) Clogged plumbing lines.
3.) Clogged impeller.
4.) Worn or damaged impeller
Motor does not run, check:
1.) Fuses
2.) Incorrect or loose wire connections
3.) Output of the controller, if used. Disconnect the controller and connect panel wires
directly to the pump motor to see if the motor runs.
Power to the motor but it doesn’t run, check:
1.) Make sure motor shaft turns free.
2.) Jammed impeller or an obstruction in (volute) casing.
3.) Controller for proper output.
4.) Check the motor brushes to see if they are worn.
Motor overheating, check:
1.) Incorrect or loose wire connections
2.) Oversized solar panel array.
3.) Make sure the motor gets a fresh air supply and the vents are kept unclogged
Noises, check:
1.) Plumbing vibration
2.) Impeller turns freely and is properly adjusted
3.) Motor bearings
4.) For cavitation, due to obstruction in or undersized suction line.
For information regarding this pump contact:
SunPumps, Inc.
325 E. Main Street
Safford, AZ 85546
Phone: (928) 348-9652