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7. Maintenance
Decalcifying the electronic
manometric switch:
8. Trouble Shooting
Problem
Warning flashing
(green Pump ON LED and yellow
ALARM LED flash alternately)
See 3. Function and Display
Pump switches on and off
continuously if liquid is drawn
at a rate greater than 400 l / h.
14
It is advantageous to fill the suction hose as well if the pump has
to overcome a large self-priming suction height, or if the suction
hose has a diameter ≥1" (25.4 mm).
Warning ! Electric shock !
Risk of injury due to electric shock.
Disconnect the Electronic Pressure Switch from
the mains before undertaking any maintenance.
1. Reduce the pressure (e. g. by opening a valve).
2. Loosen the pressure hose and fill the manometric switch
water containing vinegar or a household decalcifying product.
3. Rinse the manometric switch
Warning ! Electric shock !
Risk of injury due to electric shock.
Disconnect the Electronic Pressure Switch from the mains
before undertaking any work to rectify faults.
Probable cause
Faulty or leaking back-flow pre-
venter at the end of the
suction hose
Pump and suction hose are not
filled up with the liquid to be
pumped
Backflow valve switch set to
position 2 and was not set to
position 1 once the pump
began pumping
Suction hose end is not sub-
merged into the liquid
Outlet too low
Suction hose or connections are
not water-tight
Suction filter clogged
Air cannot escape on delivery
side since release points are
closed etc.
Delivery pipe or consumer are
not water-tight
Dirt has collected on the
manometric switch.
thoroughly after decalcifying.
Remedy
1. Unplug the manometric switch.
2. Rectify the fault.
3. Plug the manometric switch
back in again.
Shouldn't the pump start prim-
ing, although you have repeat-
edly pressed the RESET button,
please contact one of our
GARDENA Service Centres
(addresses you will find on the
rear side).
1. Remove manometric switch
from pump.
2. Return valve set to position 2.
3. Rinse manometric switch.
with
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