Installation Guide

Intelliboost™ Water Booster System
Basic Operation Manual
14
WARNING! Risk of electrical shock and possible unexpected starts.
Disconnect all power to the pump before servicing or working on pump. Make sure that power is locked out
and that pump cannot be accidentally started.
Problem Cause
1. Motor does not run
when started
A. Power failure
B. Fuses blown
C. Motor starter overload has tripped out
D. Main contacts in motor starter are not making contact or the coil is faulty.
F. Motor is defective
2. Motor starter overload
trips out immediately
when power supply is
switched on
A. One fuse has blown
B. Contacts in motor overload relay are faulty
C. Cable connections are loose or faulty
D. Motor winding is defective
E. Pump is mechanically blocked
F. Overload setting is too low
3. Motor starter overload
trips out occasionally
A. Overload setting is too low
B. Low voltage at peak times
4. Motor starter has not
tripped out but the motor
does not run
A. Power failure
B. Fuses blown
C. Main contacts in motor starter are not making contact or the coil faulty
D. Control circuit fuses are defective
5. Pump capacity is not
constant
A. Pump inlet pressure is too low
B. Suction pipe/pump is blocked
C. Pump is sucking air
6. Pump runs but gives
no water.
A. Suction pipe/pump is blocked
B. Foot or nonreturn valve is blocked in closed position
C. Leakage in suction pipe
D. Air in suction pipe or pump
E. Motor rotates in the wrong direction
7. Pumps runs backward
when switched off
A. Leakage in suction pipe
B. Foot or nonreturn valve is defective
C. Foot valve is blocked in open or partly open position
D. Nonreturn valve leaks or is blocked in open or partly open position
E. Discharge valve is defective
8. Leakage from shaft seal A. Pump shaft position is incorrect
B. Shaft seal is defective
9.Noise A. Cavitation is occurring in the pump
B. Pump does not rotate freely (that is, there is increased frictional resistance) because
of incorrect shaft position