Wilo TOP-S Instrucciones De Instalación Y Funcionamiento página 14

Problem
Pump is connected
but fails to run.
The green indicator system fluid.
light is on.
(Fig.5/6, Pos.2)
Pump output too
low.
The green indicator the pump housing
light is on.
(Fig.5/6, Pos.2)
Noise in the system. Air in the system.
The green indicator The pump flow is too Decrease the pump output by switching to a
light is on.
(Fig.5/6, Pos.2)
Noise in the pump.
The green indicator Cavitations due to
light is on.
(Fig.5/6, Pos.2)
If the fault cannot be remedied, please contact your local heating specialist or WILO custo-
mer services.
Causes
Motor is blocked, e.g. Check and if necessary rectify that the rotor
by deposits from the shaft still rotates freely.
There is foreign
material inside
or impeller.
Wrong pumping
direction.
Shut-off valves are
not fully open.
Three-phase pumps
only:
Wrong direction of
rotation.
The red LED is on.
(Fig.5, Pos.3)
high.
The pump head is too Check speed setting, if necessary switch to a
high.
Air in the pump.
insufficient inlet
pressure.
There is foreign
material inside the
pump housing or
impeller.
Shut-off valves are
not fully open.
Remedy
Pump with equipped vent plug:
Remove the vent plug,
x
insert a flat head screwdriver into the slot end
x
of the shaft and turn to ensure free rotation,
replace the vent plug.
x
Pump without equipped vent plug:
Disassemble the motor head and check;
x
unblock by turning the impeller if necessary.
If the blockage cannot be removed,
contact Customer Services.
Disassemble the pump head and remove
foreign material.
Exchange the pump suction and discharge sides.
Observe the arrow indicating direction on the
pump housing.
Open the shut-off valves fully.
Correct the electrical connection in the
terminal box:
Interchange two phases on the mains terminal.
x
Vent the system.
lower speed.
lower speed.
Vent the pump / unit (see chapter 8.1)
Increase system pressure within the permissible
range.
Disassemble the pump head and remove the
foreign material.
Open the shut-off valves fully.
ENGLISH
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