15
10. Fault Finding Chart
Before maintenance or repair disconnect the pump
from the power supply to avoid accidental starting of the
pump!
Fault
Cause
Remedy
Pump does not
start
Supply failure
Check the volta-
ge
Impeller blocked
by impurities
Close the incom-
ing sewer, emp-
tying the tank
with the dia-
phragm pump,
open the clening
cover, clean the
tank by hand
and remove sol-
ids which may
block the pump
Pressure hose is
leaky or clogging
Check the hose
and clean or re-
place
Fuses blow due to
use of wrong type
of fuse
Install fuses of
the correct type
Pump does not
stop
Pressure hose is
leaky or clogging
Check the hose
and clean or re-
place
Control box failure Check the con-
trol box and re-
place it if neces-
sary
Swing check valve
is blocked or leaky
For emptying the
dischrage pipe
tightened the
drainscrew at the
swing check
valve housing.
Loose the elastic
union piece and
screw off the
gate valve.
Check and clean
the swing check
valve. Never
take off the
housing from the
tank.
Failure advice
or alarm advice
at the control
box
see 6.2.