Wilo Drain TM 25/6 A Notice De Montage Et De Mise En Service page 13

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10 Faults, their causes and remedies
Fault
The pump won't start or stops
during operation
The pump doesn't turn on/off
The pump doesn't pump properly
The flow rate decreases during
operation
If the fault can't be fixed, please contact your
local specialist or your nearest Wilo customer
service location or representative.
11 Spare parts
Spare parts can be ordered from your local spe-
cialist and/or via Wilo customer service.
To avoid queries and incorrect orders, always pro-
vide all of the details on the name plate with every
order.
We reserve the right to make technical changes!
12
Cause
Interruption to the power
Motor protection switch has tripped
The temperature of the pumped liquid is too
high
Pump is silted up or seized
Float switch is jammed or cannot move
freely
Air in the system can't escape
The water level is below the suction opening If possible, submerse the pump more deeply
The non-return valve in the pump port is
sticking
Kink in the hose / Stop valve closed
The suction basket is blocked / the impeller
is jammed
Remedy
Check fuses, cables and electrical connec-
tions
Allow the pump to cool down; it will restart
automatically
Allow to cool down
Remove power from the pump and pull it
out of the shaft
Remove the suction basket and wash down
the suction basket and impeller under run-
ning water
Check the float switch and make sure that it
can move freely
Bleed air from the system, emptying if nec-
essary
Check the switch off level
(note switch-off level)
Check that it is working properly
Unkink the hose / open the stop valve
Remove power from the pump and pull it
out of the shaft
Dismantle the suction basket / centrifugal
device, wash down suction basket / impeller
under running water.
WILO AG 10/2006