en
Faults, causes and remedies
34
WILO SE 2017-12
WARNING
No persons are allowed to be present inside the working area of the
pump!
Persons may suffer (serious) injuries while the pump is in operation! No persons may
therefore be present inside the working area. If persons must enter the working area
of the pump, the pump must be decommissioned and secured against being
switched on again without authorisation.
WARNING
Attached macerator: sharp edges on the cutting plate and rotating blade!
The macerator can cause amputation of limbs! Wear safety gloves to protect against
cuts and never reach into the macerator!
Fault: Pump does not start
1. Electricity supply interrupted or short-circuit/earth fault in the cable or motor
winding.
⇒ Have the connection and motor checked by a qualified electrician and replace
if necessary.
2. Tripping of fuses, of the motor protection switch or the monitoring device
⇒ Have the connection and the monitoring device checked by a qualified electri-
cian and change it if necessary.
⇒ Have the motor protection switches and fuses installed and adjusted accord-
ing to the technical specifications by a qualified electrician and reset monitor-
ing device.
⇒ Check the impeller to make sure that it runs smoothly, clean the hydraulics if
necessary.
3. The sealing chamber control (optional) has interrupted the electric circuit (connec-
tion-related)
⇒ See “Fault: Mechanical seal leakage, sealing chamber control reports a fault
and switches the pump off”.
Fault: Pump starts up, motor protection trips after short period
1. Motor protection switch set incorrectly.
⇒ Have the adjustment of the trigger checked and corrected by a qualified elec-
trician.
2. Increased power consumption due to major voltage drop.
⇒ Have the voltage of individual phases checked by a qualified electrician. Con-
tact the electricity distribution network.
3. There are only two phases at the connection.
⇒ Have the connection checked and corrected by a qualified electrician.
4. Excessive differences in voltage between the phases.
⇒ Have the voltage of individual phases checked by a qualified electrician. Con-
tact the electricity distribution network.
5. Incorrect direction of rotation.
⇒ Have the connection corrected by a qualified electrician.
6. Increased power consumption through jammed hydraulics.
⇒ Clean the hydraulics and check the inlet.
7. The density of the fluid is too high.
⇒ Contact customer service.
Fault: Pump runs, there is no volume flow
1. There is no fluid.
⇒ Check the inlet, open all gate valves.
2. Inlet clogged.
