Wilo COE-2 MHIL Série Notice De Montage Et De Mise En Service page 28

English
Faults
1 pump is not turning
No pressure on the discharge side
28
Causes
Thermal relay activated
Magnetic circuit breaking
activated
Pump shaft blocked
Winding malfunction
Contactor coil burnt
Selected flow rate higher than
the capacity of the pressure-
boosting system
1 or 2 pumps deactivated
Municipal water supply pressure
below minimum prescribed
pressure
The pumps are turning in the
wrong direction
1 pump is obstructed by
foreign bodies
The motors are supplied by
insufficient voltage
Remedies
The "Fault" indicator light for the pumps must be
illuminated on the switchgear. Check the current
setting.
Reset.
If the activations persist, check the current absorbed
by the motor in question. If this current is a lot higher
than that indicated on the motor, this is defective and
shall have to be changed.
Switch off the power supply for the switchgear,
then check that the shaft is turning freely. If this
is blocked, dismantle the pump.
Disconnect the terminal for the motor in question
and check the power supply at the terminals and the
stator's insulation. Replace the motor if necessary.
Change it.
Consider replacing the pressure-boosting system
for another one that is more suitable (contact us in
any case).
Check that the suction strainer on the reservoir
does not absorb air and that the filling of the
reservoir is not too close to the strainer.
Contact the local water supplier or replace the
pressure-boosting system. Contact us.
Cross-wire 2 power supply wires to the motor
terminals.
Dismantle and clean the pump.
Check the voltage at the motor terminals.
WILO SE 02/2020