13
SYMPTOM
CAUSES
TROUBLESHOOT
One pump fails to run
Suction piping obstructed or valve
on suction manifold closed
Check valve opening and clean the piping
if necessary
Thermal relay tripped
The pump “fault” indicator on the control
box must be lit. Check the setting of the
current
Magnetic circuit breaker tripped
Switch it again. If tripping recurs, check the
output current of the motor concerned. If
t h is current is much higher than the one
mentioned on the motor type plate, the
circuit breaker is defective and shall be
replaced
Pump shaft blocked
Switch off the electric supply of the
control box and then check the shaft turns
freely. If it is blocked, dismantle the pump
Winding fault
Disconnect the terminal block of the
motor concerned. Check the network at
the terminals and the stator insulation.
Replace the motor if necessary
No delivery Pressure
Flow is higher than the booster
capability
Plan to replace the booster by a more
adequate one (do not forget to contact us
in any case)
Pumps not primed
Check that the suction strainer does not
let air in or the tank filling point is too
close from the strainer
A pump is obstructed by particles
Have the pump dismantled and cleaned
Voltage of the motors too low
Check the voltage on motor terminals
Voltage of the motors too low
Voltage to terminals too low.
Check the voltage on motor terminals
,
Tripping frequency of dry running
safety
Installation capacity too low
Increase tank size
No air inside the vessel
Pressurize the tank or replace the bladder
Setting of dry running pressure
switch too high
Set the pressure switch correctly
Table 4 - Booster Troubleshooting
1 PUMP SET
Max
Current
2 PUMP SET
Max
Current
3 PUMP SET
Max
Current
Centrum SV406
29993227
5.5 A
Centrum DV406
29993233
10.0 A
Centrum TV406
29993239
14.5 A
Centrum SV408
29993228
6.7 A
Centrum DV408
29993234
12.6 A
Centrum TV408
29993240
18.1 A
Centrum SV605
29993229
6.7 A
Centrum DV605
29993235
12.6 A
Centrum TV605
29993241
18.1 A
Centrum SV608
29993230
9.9 A
Centrum DV608
29993236
19.1 A
Centrum TV608
29993242
29.3 A
Centrum SV1004
29993231
9.2 A
Centrum DV1004
29993237
17.8 A
Centrum TV1004
29993243
26.3 A
Table 5 - Booster Maximum Current (I max)
