Wilo TOP-S Instrucciones De Instalación Y Funcionamiento página 19

Problem
Pump is connected but
fails to run. The green
indicator light is on.
(Fig. 5/6, Pos. 2)
Pump output too low.
The green indicator
light is on.
(Fig. 5/6, Pos. 2)
Noise in the system.
The green indicator
light is on.
(Fig. 5/6, Pos. 2)
Noise in the pump.
The green indicator
light is on.
(Fig. 5/6, Pos. 2)
If the fault cannot be remedied, please contact your local heating specialist,
or manufacturer's representative or Wilo customer services..
Installation and operating instructions Wilo-TOP-S
Causes
Motor is blocked, e.g. by
deposits from the system
fluid.
There is a foreign body
inside the pump housing 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)
Air in the system.
The pump flow is too high. Decrease the pump output by
The pump head is too high. Check speed setting, if necessary
Air in the pump.
Cavitations due to insuffi-
cient inlet pressure.
There is a foreign body
inside the pump housing or
impeller.
Shut-off valves are not
fully open.
Remedy
Check and if necessary verify that
the rotor shaft still rotates freely.
Pump with equipped vent plug:
• Remove the vent plug,
• insert a flat head screwdriver into
the slot end of the shaft and turn
to ensure free rotation,
• replace the vent plug
Pump without equipped vent plug:
• Disassemble the motor head and
check; unblock by turning the
impeller if necessary.
If the blockage cannot be removed,
contact Customer Services.
Disassemble the pump head and
remove foreign body.
Exchange the pump pressure and
suction 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.
Vent the system.
switching to a lower speed.
switch to a 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 body.
Open the shut-off valves fully.
English
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