Wilo Drain TM 25_6 - Manual (Page 13)

English
12 WILO AG 10/2006
10 Faults, their causes and remedies
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!
Fault Cause Remedy
The pump won't start or stops
during operation Interruption to the power Check fuses, cables and electrical connec-
tions
Motor protection switch has tripped Allow the pump to cool down; it will restart
automatically
The temperature of the pumped liquid is too
high Allow to cool down
Pump is silted up or seized 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
The pump doesn't turn on/off Float switch is jammed or cannot move
freely Check the float switch and make sure that it
can move freely
The pump doesn't pump properly Air in the system can't escape Bleed air from the system, emptying if nec-
essary
Check the switch off level
The water level is below the suction opening If possible, submerse the pump more deeply
(note switch-off level)
The non-return valve in the pump port is
sticking Check that it is working properly
Kink in the hose / Stop valve closed Unkink the hose / open the stop valve
The flow rate decreases during
operation The suction basket is blocked / the impeller
is jammed 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.