DAB S4 Instructions Pour L'installation Et La Maintenance page 16

FAULTS
3. The motor A. Check that the voltage is sufficient and
protection is
tripped after B. Check
long periods of
apparently
normal
operation
4. Motor running A. In the three-phase versions check the
but flow rate is
not sufficient B. Check that the pipes are not partially
C. Check that the pump flow rate is lower
D. Check the state of wear of the pump
5. Motor running A. Check that there has not been an
but pump does
not deliver
B. Check that the required head is not
C. In the three-phase versions check the
D. Pump blocked by impurities
6. The pressure is A. Check for leaks in the system
insufficient B. In the three-phase version check the
C. Check the state of wear of the pump
7. Pump starts A. Check for leaks in the system
and stops too B. Check the correct operation of the check
frequently
C. Check the efficiency of the pressure
D. Check that the tank is of sufficient size
E. Check the position of the probes against
CHECKS (possible causes)
that all the phases are present
for excessive
(scraping between rotating and fixed
parts, presence of sand, etc.)
direction of rotation
obstructed
than that of the well
excessive lowering of the level of the well
resulting in possible dry running
higher than that of the pump
direction of rotation
direction of rotation
valve
switch, if used
dry running, if used
ENGLISH
A. Restore the missing phase
torque forces B. Eliminate the cause of friction or clean
the pump to remove any obstructions
A. Invert any two phase leads
B. Eliminate the obstructions
C. Replace the pump with one with a
lower flow rate
D. Overhaul the pump
A. Wait for the natural level to be
restored or lower the level of the well.
Install adequate protection against dry
running
B. Replace the pump with one with
suitable characteristics
C. Invert two phase leads
D. Clean the pump, grid or pipes
A. Take action to eliminate leaks
B. Invert two phase leads
C. Overhaul the pump
A. Take action to eliminate leaks
B. Repair or replace the valve
C. Repair or replace the pressure switch
D. Replace it with one of adequate
capacity
E. Reposition the probes to have longer
running times
14
REMEDIES