G:\INSTRUCT\Sanismart Plus\Sanismart Plus Instructions.docx 9/9/2020 Page 12
14. Fault Finding Chart
NOTE:- Within the warranty period, any work not described in this manual must be carried out by Wallace Pumps Service Agents,
otherwise your warranty and the product's durability period will be invalidated.
ALWAYS ensure isolation and disconnection of the power supply
to the pump before and whilst carrying out any servicing
work on the unit. Also ensure no liquid will flow into it during servicing.
OCCURRENCE
POSSIBLE CAUSE
REMEDY
1.
-Motor runs
continuously
without clearing the
liquid.
-Level switch operated by water level
remains in the ON position because :
a. pipework is blocked; or
b. pump is blocked; or
c. tank is blocked; or
d. delivery hose is kinked.
e. pressure switch is water logged
-Check that the pipework is clear.
-Turn off the power and check that the pump can
rotate freely in both directions by turning the
shaft at the top end of the motor with
a Hex Key
provided with the unit.
-If blocked, clear the obstruction.
-PVC Pipes are recommended.
2.
-Pump runs but
delivers little or no
liquid.
-Delivery head (combination of vertical &
horizontal pipe lengths, pipe bends and
size) is too high for the unit.
-Partial blockage to pump inlet
-Check the system against the pump operating
parameters. Refer Section 5 (Pump hydraulic
capability).
-Check that the pump is not starting before air in
casing is purged out and so it is getting air
locked
3.
- Pump starts but
takes over 20
seconds to reduce
the liquid level in
the tank
-Delivery line is partially blocked or too
small.
-Pump and tank is not venting.
-Blockage to pump inlet
-Inflow rate is too high than pump can
pump out.
-Unblock and/or change the pipework to the
bigger ID size. Check with Wallace.
-Visually check that the tank vent pipe is clear;
or by releasing the pipe from the tank and blow
down it; or by removing it and flush clean.
-Check with Wallace for suitable model for high
inflow situation
4.
Motor does not start
at all
-Not connected to power supply.
-Power cut/fuse blown.
-Connection to pressure switch are not
connected or broken.
-Connect power.
-Restore electrical supply.
-Check wires connections from pressure switch
to circuit board.
5.
Motor does not start
at all and alarm
activates
- Pump Impeller Jammed / blocked.
- Check and clear impeller jam with
a Hex Key
provided with the unit.
6.
Pump does not
start even if water
level is above On
level
- Dip pipe is blocked.
- Pressure Switch connection to circuit
board not connected or broken
- Faulty Pressure Switch.
- Check clean dip tuner. This can be done by
undoing small clear tube from dip tube and
blowing air from top so any dirt will fall in tank.
- Check and restore connection.
- Change Pressure switch to new one.
7.
After evacuation the
motor engages
several times
before stopping, or
restarts at intervals
without any liquid
discharged into the
collection tank.
-Water is leaking / back flowing into the
unit from the delivery pipe, triggering the
motor to re-start.
-Non-return valve does not close
properly.
-No non-return valve in the delivery line.
-Check that the non-return valve is clear. This
should be the supplied 25 mm Full flow Swing
Check Valve installed in a
vertical
section of
pipe as close as possible (within 1 metre) of the
pump.
-Remove the obstruction to ensure Non Return
valve closes properly.
-Install 25 mm full flow non-clog non-return
swing check valve supplied.
