DAB S4 Instruction For Installation And Maintenance - Page 7
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12. TROUBLESHOOTING
FAULTS
1. The motor does
A. Check that the motor is powered and that the
not start
B. Check the presence of all phases for three-phase
C. Dry running
2. Motor protection is
A. Make sure that the supply voltage
activated
shortly
after starting
B. Check the presence of all phases
C. Check the setting of the protection and the
D. Check that the liquid temperature is not too high
E. Check for excessive torque forces (scraping
3. The
motor
A. Check that the voltage is sufficient and that all the
protection
is
tripped after long
B. Check for excessive torque forces (scraping
periods
of
apparently normal
operation
4. Motor running but
A. In the three-phase versions check the direction of
flow rate is not
sufficient
B. Check that the pipes are not partially obstructed
C. Check that the pump flow rate is lower than that of
D. Check the state of wear of the pump
5. Motor running but
A. Check that there has not been an excessive
pump does not
deliver
B. Check that the required head is not higher than
C. In the three-phase versions check the direction of
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 direction of
C. Check the state of wear of the pump
7. Pump starts and
A. Check for leaks in the system
stops
too
B. Check the correct operation of the check valve
frequently
C. Check the efficiency of the pressure switch, if used
D. Check that the tank is of sufficient size
E. Check the position of the probes against dry
CHECKS (possible causes)
voltage corresponds to the value on the data plate
motors
corresponds to the value on the data plate
presence of possible open or dirty contacts
between rotating and fixed parts, sand in the
pump, etc.)
phases are present
between rotating and fixed parts, presence of
sand, etc.)
rotation
the well
lowering of the level of the well resulting in
possible dry running
that of the pump
rotation
rotation
running, if used
ENGLISH
A. Check the fuses
B. Restore the missing one
C. Lower the pump level or wait for the natural
restoration of the level in the well
B. Restore the missing phase
C. Restore the protections, consulting the data
plate or replacing the components concerned
E. Eliminate the cause of friction or clean the
pump to remove any obstructions
A. Restore the missing phase
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
11
REMEDIES