Troubleshooting

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CAUTION ! Always disconnect the pump from the electrical power source before handling.

If the system fails to operate properly, carefully read instructions and perform maintenance recommendations. If operating problems persist, the following chart may be of assistance in identifying and correcting them:

MATCH "CAUSE" NUMBER WITH CORRELATING "CORRECTION" NUMBER.

NOTE: Not all problems and correction will apply to each pump model.

PROBLEM		CAUSE	CORRECTION
Pump will not run.	1.	Poor electrical connection, blown fuse,	1. Check all electrical connections for
	tripped breaker or other interruption of		security. Have electrician measure current
	power; improper power supply.		in motor leads, if current is within ±20% of
	2.	Motor or switch inoperative (to isolate	locked rotor Amps, impeller is probably
	cause, go to manual operation of pump).		locked. If current is 0, overload may be
	2a. Float movement restricted.		tripped. Remove power, allow pump to
	2b. Switch will not activate pump or is		cool, then recheck current.
	defective.		2a. Reposition pump or clean basin as
	2c. Defective motor.		required to provide adequate clearance for
	3.	Insufficient liquid level.	float.
Pump will not turn off.	2a. Float movement restricted.		2b. Disconnect level cont rol. Set
Pump will not turn off.	2a. Float movement restricted.		ohmmeter for a low range, such as 100
	2b. Switch will not activate pump or is		ohmmeter for a low range, such as 100
	2b. Switch will not activate pump or is		ohms full scale and connect to level control
	defective.		ohms full scale and connect to level control
	defective.		leads. Actuate level control manually and
	4.	Excessive inflow or pump not properly	leads. Actuate level control manually and
	4.	Excessive inflow or pump not properly	check to see that ohmmeter shows zero
	sized for application.		check to see that ohmmeter shows zero
	sized for application.		ohms for closed switch and full scale for
	9.	Pump may be airlocked.	ohms for closed switch and full scale for
	9.	Pump may be airlocked.	open switch. (Float Switch).
	14. Switch is in "HAND" position.		open switch. (Float Switch).
	14. Switch is in "HAND" position.		2c. Check winding insulation (Megger
Pump hums but doesn’t run.	1.	Incorrect voltage.	2c. Check winding insulation (Megger
Pump hums but doesn’t run.	1.	Incorrect voltage.	Test) and winding resistance. If check is
	8. Impeller jammed or loose on shaft, worn		out side of range, dry and recheck. If still
	or damaged, impeller cavity or inlet		defective, replace per service instructions.
	plugged.		3. Make sure liquid level is at least equal to
Pump delivers insufficient capacity.	1.	Incorrect voltage.	suggested turn-on point.
	4.	Excessive inflow or pump not properly	4. Recheck all sizing calculations to
	4.	Excessive inflow or pump not properly	determine proper pump size.
	sized for application.		determine proper pump size.
	5.	Discharge restricted.	5. Check discharge line for restrictions,
	5.	Discharge restricted.	including ice if line passes through or into
	6.	Check valve stuck closed or installed	including ice if line passes through or into
	backwards.		cold areas.
	backwards.		6. Remove and examine check valve for
	7.	Shut-off valve closed.	6. Remove and examine check valve for
	8. Impeller jammed or loose on shaft, worn		proper installation and freedom of
	8. Impeller jammed or loose on shaft, worn		operation.
	or	damaged, impeller cavity or inlet	operation.
	plugged.		7. Open valve.
	plugged.		8. Check impeller for freedom of operation,
	9.	Pump may be airlocked.	8. Check impeller for freedom of operation,
	10. Pump running backwards.		security and condition. Clean impeller
Pump cycles too frequently or runs	6.	Check valve stuck closed or installed	cavity and inlet of any obstruction.
Pump cycles too frequently or runs	6.	Check valve stuck closed or installed	9. Loosen union slightly to allow trapped air
periodically when fixtures are not in use.	backwards.		9. Loosen union slightly to allow trapped air
periodically when fixtures are not in use.	backwards.		to escape.Verify that turn-off level of switch
	11. Fixtures are leaking.		to escape.Verify that turn-off level of switch
	11. Fixtures are leaking.		is set so that impeller cavity is always
	15. Ground water entering basin.		is set so that impeller cavity is always
	15. Ground water entering basin.		flooded. Clean vent hole.
Pump shuts off and turns on independent	1.	Incorrect voltage.	10. Check rotation. If power supply is three
of switch. (trips thermal overload	4.	Excessive inflow or pump not properly	phase, reverse any two of three power
protector). CAUTION! Pump may start	sized for application.		supply leads to ensure proper impeller
unexpectedly. Disconnect power supply.	8. Impeller jammed, loose on shaft, worn		rotation.
	or damaged, impeller cavity or inlet		11. Repair fixtures as required to eliminate
NOTE: Some pumps DO NOT have	plugged.		leakage.
thermal overload protection on the motor.	12. Excessive water temperature		12. Check pump temperature limits & fluid
Check pump specifications to determine.	(internal protection only).		temperature.
Pump operates noisily or vibrates	2c. Worn bearings, motor shaft bent.		13. Replace portion of discharge pipe with
Pump operates noisily or vibrates	2c. Worn bearings, motor shaft bent.		flexible connector.
excessively.	8.	Debris in impeller cavity or broken	flexible connector.
excessively.	8.	Debris in impeller cavity or broken	14. Turn to automatic position.
	impeller.		14. Turn to automatic position.
	impeller.		15. Check for leaks around basin inlet and
	10. Pump running backwards.		15. Check for leaks around basin inlet and
	10. Pump running backwards.		outlets.
	13 . Piping attachments to building		outlets.
	13 . Piping attachments to building
	structure too rigid or too loose.