FLOWTECH flowboost G.V Operation And Maintenance Manual page 19

Pump leaks water
Cause
Defective mechanical seal
Undue mechanical stress on pump
Too noisy
Cause
Water return when pumps stop
Cavitation
Pump rotation hindered
The unit does not generate the desiderate pressure
Cause
The pumps rotate in wrong direction
On-off valves closed
Air in the suction pipe
Excessive suction lift
Excessive flow resistance on suction
side
Foot valve damaged
Excessive flow resistance in delivery
pipes or valve, or both
Triggering of general system protection (fuses)
Cause
Short circuit
Triggering of differential protection
Cause
The motor is damaged
The power cable of the motor is
faulty or worn
The residual circuit breaker is not
compliant to specific
Residual current to high
flowboost
Solution
Replace the mechanical seal
Support the pipes
Solution
Check the non-return valve
Check suction
Check for undue mechanical stress on pump
Solution
Check the correct connection to the motor by exchanging two leads
Open the valves
1. Eliminate the air
2. Prime the pumps
Reduce the suction lift
Increase the diameter of the pipes
Replace the foot valve
Reduce water leaks
Solution
1. Check the connection cable
2. Check the motor
Solution
Replace the motor
Replace the cable
Replace the residual circuit breaker
Contact technicians qualified to modify the electrical installation
G.V Pump Manual
19