4
Trouble Shooting Chart
Symptom
Motor will not start or run
Pump will not prime
Little or no discharge
Noisy pump operation
Possible Causes
1. Improperly wired
1. Check motor wiring diagram
2. Blown fuse or open circuit breaker 2. Replace fuse or circuit breaker after
reason for overload has been corrected
3. Loose or broken wiring
3. Tighten connections, repair wiring
4. Foreign object in impeller
4. Disassemble pump, remove object
5. Motor shorted out
5. Replace motor
6. Dry run cutout has opened circuit
6. Allow unit to cool, restart after reason for
cutout has been determined and corrected
1. Leak, obstruction, or kink in
1. Repair as necessary
suction line
2. Suction line closed
2. Open
3. Pump is worn
3. Replace parts
1. Housing not filled with water
1. Properly prime housing
2. Suction piping too small
2. Increase to pump inlet size or one size
larger
3. Total head too high
3. Reduce discharge head
4. Impeller plugged
4. Disassemble pump and clean impeller
5. Pump not running
5. Check motor operation
1. Air trapped in housing
1. Check pump prime, also turn pump on
and off several times to bump air pocket out
of pump
2. Rotor bearing worn
2. Replace rotor assembly
3. Debris in housing
3. Disassemble pump and remove debris
Corrective Action
3. Operate the pump for approximately 10 minutes to purge any remaining air in the system. It may be
necessary to open a discharge valve, port and/or fixture to ensure that the air has been purged. The pump should be
running quietly. If a “gurgling” noise is present it may mean there is still air in the system. Turning the pump on and off
several times will generally clear the remaining air. If this “gurgling” noise persists, recheck the system and
re-purge the air. System and pump should now operate quietly and efficiently.
4. Dry Run Protection: Some pumps are equipped with Dry Run Protection. After a series of start attempts if the pump
does not detect that it is pumping the pump will turn off and remain off until the power is interrupted. After the dry con
-
dition is eliminated and the pump is reenergized the pump will operate.
Maintenance
Ensure that the unit is disconnected from the power source before
attempting to service or remove any components.
1. Since the rotor/impeller unit (see exploded views) is the only
moving part, its replacement and/or the replacement of the motor is
simple.
2. After the power has been disconnected using a counter clockwise
motion remove the screw ring housing to motor connection on
models E1, E3, and E5. The E10
3. Remove the “O” ring from the pump housing.
4. Remove and replace the rotor. Check to make sure that the
ceramic bearing on the motor is intact and is not chipped or
otherwise damaged.
5. Replace the “O” ring with a new one and reverse the disassembly
procedure to reassemble the pump.
6. Since these units are self lubricated by the pumped fluid, they
never need external lubrication.
7. Pump should be drained when subjected to freezing temperatures.
8. If provided, the suction line strainer should be cleaned at regular
intervals.
A
B
C
D
E
Replacement Parts
Please provide the following
information when ordering:
• Model number
• Serial number
• Part description
A - Housing
B - “O” Ring
C - Rotor Assembly
D - Motor Assembly
E - Screw Ring
