page 20 — st4/st6 series submersible pumps • operation anD parts manual — rev. #1 (11/12/13)
oPeraTion
reset button
1. When the electronic overload module detects an
overload condition, the pump will shut down. Check the
pump and correct the cause of ther overload.
2. Let the pump cool down, then press the
RESET
button
(see Figure 14) on the front of the control box to restore
power.
Figure 14. RESET Button
shut-Down
1. Place the 3-position operation switch on the control
box to the
oFF
position (Figure 15).
Figure 15. Manual-Off-Auto SW.
(OFF Position)
2. Verify that the control box power
on
light is
oFF
.
3. Turn the circuit breaker or quick disconnect switch to
the
oFF
position.
4. Using a suitable lifting device, lift the pump up from
its current position and place on a secure flat surface.
5. Remove the discharge hose from the discharge port
on the pump.
6. Remove all power cables and float switches from
the control box. Place cables and float switches in a
suitable container where they will not get damaged.
7. If the pump was used to pump mud, grit or silt, flush
vigorously with clean water.
8. Wipe off any mud or debris that might have attached
itself to the pump.
9. Store pump in a clean dry place away from dirt and
debris.
Control box operation (manual mode)
1. From the voltage source, set the circuit breaker or quick
disconnect switch to the
on
position.
2. For manual operation of the pump, place the 3-position
operation switch (Figure 11) on the control box in the
manual
position.
Figure 11. Manual-Off-Auto SW.
(Manual Position)
3. Verify that the
on
indicator (Figure 12) on the control
box is
LIT
. This means that power is being supplied to
the control box.
Figure 12. Control Box Power ON Indicator
4. In the manual mode the pump will run continuously. Pay
close attention when running the pump in this mode.
Damage
to the pump may occur if pump is not fully
immersed in water.
Control box operation (auto mode)
1. To operate the pump automatically (float switches),
place the 3-position operation switch in the
auto
position (Figure 13).
Figure 13. Manual-Off-Auto SW.
(Auto Position)
2. In the
auto
mode the pump will run as long as there
is a sufficient amount of water. This amount of water
is determined by the setting of the float switches. The
stop float
switch contacts will open when the water
level is low and power will be removed from the pump's
electric motor.
Once the water level has risen back to the appropriate
level the
start float
switch contacts will close and power
will be restored to the pump's motor.
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