Gardena 4000/4 Manuale di istruzioni per l'uso - Pagina 12
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Trouble-Shooting
Problem
Pump motor runs,
but delivery capacity
or pressure suddenly
decreases
Pump doesn't deliver water
Pump switches on and off
continuously if liquid is
drawn at a rate greater
than 400 l / h
Pump doesn't start or
suddenly stops during
operation
Pump switches on and off
without drawing-off water
for long intervals
Pump permanently switches
on and off after drawing off
water
Pump doesn't start working
If you have any problems with your Pressure Tank Unit, please contact our Service or return the
defective unit together with a short description of the problem – in case of guarantee, with a copy of
the receipt – postage paid to one of the GARDENA Service Centres listed on the back of this leaflet.
24
Probable cause
Leaks at suction side.
Suction filter on suction hose
is partially or entirely exposed.
Suction filter or backflow pre-
venter clogged.
Leaks at suction side.
Dirt has collected on the impeller 1. Return valve set to
of the manometric switch.
No power.
Circuit breaker has cut out the
pump because of overloading.
Electric failure.
Leak on the pressure side.
Switch / backflow valve set
to START.
Larger leaks on the pressure side. Rectify leaks.
Outlet end (e.g. water accessory) Open the outlet end.
is closed. There is sufficient water
pressure in the pressure line.
Remedy
Eliminate leak.
Throttle the pump on the deliv-
ery side to adjust the flow rate
of the inlet side to the rate of
the delivery side. Observe min.
flow rate (see "Technical Data").
Clean filter or backflow pre-
venter.
Eliminate leak.
position 2.
2. Rinse Pump.
Check fuses and electric
connections.
Observe max. liquid temper-
ature (35 °C).
Send the pump to one of our
GARDENA Service Centres.
Check the pressure line and
connected consumers for leaks.
The non-return valve shall be
at position RUN when localising
faults.
Note: Even the smallest leak
(loss of a few ml) can cause
the pressure in the pump to
drop. The cause of this is often
small leaks at taps and toilet
flushing cisterns.
Set the switch to RUN.