English
44
WILO SE 11/2013
If the operating fault cannot be remedied, please consult an installer or the
nearest Wilo customer service point or representative.
Fault
With the power switched on, the pump does not run.
Cause
Motor protection has switched the pump off, because:
a)
Switch off
because of
hydraulic over-
loading of the
pump.
b)
Switch off because of
obstruction within the
pump.
c)
Switch off
because of
excessive fluid
temperature.
d)
Switch off
because of
excessive
ambient tem-
perature.
Remedy
a)
Throttle the
pump at the
pressure side to
a duty point on
the pump
curve.
b)
If necessary remove
the venting screw (visi-
ble from outside) from
the pump and check the
free running of the pump
rotor by turning the
slotted shaft end, using
a screwdriver; unblock if
necessary.
Alternatively:
Dismantle the motor
head and check; if nec-
essary unblock by turn-
ing the impeller. If the
obstruction cannot be
cleared, contact cus-
tomer service.
c)
Reduce the
temperature of
the fluid, see
rating plate
data.
d)
Reduce the
ambient tem-
perature , e.g.
by insulating
the piping and
fittings.
Display
Displays of the lights in the terminal box type
1
2
3
4
5
6
7
-
-
-
-
red
green
red
Fault acknowl-
edgement
Terminal box type 1/2
Auto-reset; after the motor has cooled down, the pump restarts automatically.
Terminal box type 5/7
After the motor has cooled down, press the reset button for a manual reset of
the fault. The pump will restart.
Terminal box type 3/4
It the thermal winding contact was connected to an external switchgear SK602/
SK622, this must be reset. With the switchgear SK602N/SK622N, acknowledge-
ment is made automatically after the motor has cooled down.
Terminal box type 6:
After the motor protection has tripped, switch off the mains voltage. Allow the
pump to cool down approx. 8 to 10 min, then switch the power supply on again.
Summary of Contents for TOP-I
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