Pentair MYERS ME40MC-11-CI, Owner'S Manual

Troubleshooting 

7

 Risk of electrical shock, cuts, and possible unexpected starts. If the power is on to the pump when 

thermal overload resets, the pump may start without warning. If you are working on the pump, you may get an 
electrical shock or the impeller may catch fingers or tools. Disconnect the power before servicing the pump.

Symptom

Possible Cause(s) / Corrective Action

Pump fails to operate.

1.   Check to be sure that power cord is securely plugged into outlet or securely wired into controller or switch box. Disconnect 

power to outlet before handling pump or motor.

2.  Check to be sure you have electrical power.
3.  Check that liquid fluid level is high enough to activate switch or controller.
4.  Check to be sure that 3/16” (5mm) vent hole in discharge pipe is not plugged.
5.  Check for blockage in pump inlet, impeller, check valve or discharge pipe.
6.   Disconnect the pump from the power source for a minimum of 30 minutes to allow the motor to cool and to protect yourself 

from sudden starts. See Warning above. Check for the cause of overheating. Pump is running dry because the float switch is 
caught up on something. Inlet pipe is plugged. Outlet pipe is plugged.

Pump fails to empty sump.

1.  Be sure all valves in discharge pipe are fully open.
2.  Clean out discharge pipe and check valve.
3.  Check for blockage in pump inlet or impeller.
4.  Pump not sized properly. A higher capacity pump may be required.

Pump will not shut off.

1.  Check switch or controller automatic floats for proper operation and location. See installation instructions for switch/controller.
2.  If pump is completely inoperative or continues to malfunction, consult your local serviceman.