TROUBLESHOOTING
A.) PUMP WILL NOT RUN
1.) Circuit breaker is open
2.) Thermal overload has tripped
3.) Improper voltage supplied to the
motor
4.) Wiring connections are loose
5.) Blown fuse
6.) Pump controls in off position
7.) Motor wired improperly
8.) Motor is defective
B.) GPM CAPACITY IS LOW
1.) Pump is not throttled correctly
2.) Pump is running backwards
3.) Pump has lost its prime
4.) The impeller was sized wrong -the
diameter is too small
5.) Impeller is worn -clearance
opened up
6.) Air or gas in the liquid
7.) NPSHA is to low
8.) Piping is undersized
9.) The impeller has a vane or vanes
plugged with debris
10.) A strainer is partially plugged
11.) Pump is undersized for the
system
12.) Phase loss -one leg of a 3-phase
motor went out
C.) EXCESSIVE NOISE/VIBRATION
1.) Rotating parts are binding
2.) Pump is cavitating
3.) Defective motor
4.) Pump is running backwards
5.) Air or gas in system
6.) Impeller is plugged with debris
7.) Pump or piping is loose
8.) Pump is not throttled correctly
- running wide open
