9
US/CAN
8. Incidents: causes and solutions
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Possible cause
Pump flows against excessive
pressure.
The discharge valve is not fully open.
The pumping station is not ventilated.
Inlet pipes or wheel clogged.
Presence of deposits / fibres in the
wheel.
The rotor does not turn freely.
The engine is off.
Trigger of the thermal protection due
to excessive temperature.
Deposits in the sump tank.
The check valve is leaky.
Vibrations in the installation.
Faulty, clogged, pulled out or impro-
perly inserted level sensor.
Faulty capacitor
In the case of three-stage installation:
2 phases may be inverted.
To check, visually look at the motor
rotation direction by dismantling the
motor.
Solutions
The size of the pumping station
is insufficient for these operating
conditions.
Open the valve to the maximum.
Check the pumping station’s vent
pipes
Remove deposits in the pump and/
or piping.
Check if the wheel turns freely without
blocking. If necessary, clean the pump.
Check the electrical installation (and
fuses).
The engine automatically restarts
after cooling.
Clean the sump tank. In case of grease
deposits, make sure there is a grease
trap.
Clean the check valve.
Check the flexible pipe connections.
Check the level sensor. Clean or replace
it, if necessary.
Replace the capacitor
With the connection, inverse 2 power
cable phases (5 wires).
7.6 Checklist for commissioning / inspection
and maintenance
Operations
Read the operating manual.
Check the power supply.
Compare the values with those of the rating plate.
Check the connection of the power supply to the earth.
heck the connection of the power supply to a 30 mA GFCI breaker.
Check the proper operation of the motors by pressing the forced mode buttons.
If abnormal, make sure the pump is not clogged, check the resistance values of the
engine coils.
Check the sump tank.
Clean the tank in case of deposits.
In case of significant grease deposits in the tank from greasy wastewater
from artisanal or industrial businesses, inform the customer that they must install
a grease trap upstream from the pumping station.
Check the level sensors. Dismantle the pressure switches and make sure that the
dip tubes are not clogged. Clean them if necessary.
Check the control mechanism.
Dismantle the level sensor. Check if it is blocked or encrusted.
Clean them, if necessary.
Perform a functional test over several cycles.
Check the correct installation and state of wear of the flexible couplings.
Check the proper operation and effectiveness of the alarm device.
Check the proper operation and seal of the stop valves and check valves.
If applicable, identify the necessary spare parts.
Advise and/or train operating staff.
Required for
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NOTE
Before working inside the pump during the warranty period, you
must consult the manufacturer. Our after-sales service is available
to you. Failure to comply leads to the loss of rights to damages.
Inappropriate work aiming to eliminate malfunctions. Risk of injury!
w
For all work intended to eliminate malfunctions, follow this
operating manual’s instructions and / or the manufacturer’s
documentation for the relevant accessories.
NOTE
After every flood, the pumping station should be inspected.
NOTE
After an incident, subject the pumping station to functional test
and visual inspection.
For any problem not described in the table below, contact Saniflo after-sales
service.
Problems encountered:
A
The pump does not flow
B
Insufficient flow
C
Excessive current / power consumption
D
Insufficient manometric delivery head
E
Irregular and noisy operation of the pump
F
Frequent faults reported by the pumping station
G
Overflow of the pumping station
H
Untimely start
Before working on pressurised components, reduce the pressure inside the
pump! Disconnect the pump from the electrical power supply.
