11
HERO 23D / Hero 23 / SF 23 Pro
3.5
REMEDY IN CASE OF FAULTS
TYPE OF
MALFUNCTION
WHAT ELSE?
POSSIBLE CAUSE
MEASURES FOR ELIMINATING THE
MALFUNCTION
Unit does not
start
Unit fuse has triggered
Let the motor cool down (you can also check
the LED on the PCB -> see chapter 3.7)
Multi-function switch not
set back previously to „0“
Set multi-function switch to „0“ and then
switch back on
Unit runs but
makes a strange-
noise
Motor runs without load (very
silent), unit without function
Gearwheel inside the
gearbox is damaged
Replace gearwheel, remove the broken pins
inside the grooves of the gearbox housing
(e.g. with compressed air)
Motor produces a loud and
high noise
Fan cover vibrates
Tighten the screws of the fan cover, if neces-
sary place waher (A6,4) between motor and
fan cover
Unit can‘t be ven-
tilated
Ventilation possible in vertical
position
Not enough oil
Check/correct oil level (Find reason for oil
loss. Maybe there is oil in the gear box?)
Unit does not
suck in
Most likely ->
Inlet valve damaged or
clogged
Replace or clean inlet valve
Outlet valve damaged or
clogged
Replace or clean outlet valve
Valve makes no sound
Unit not ventilated
Ventilate unit
Delivery rate too
low
Most likely ->
Inlet valve damaged
Replace inlet valve
Material sucked up hardly
Unit is sucking in air
Search for the problem: suction system?,
Inlet valve pusher?, Gaskets inside the inlet
valve? Red inlet installed?...
Suction filter clogged
Clean or replace
Viscosity of the material
too high
Try to us outlet valve 341246 testen (stain-
less steel version from SF-31)
Unit does not
generate pres-
sure
Material comes out of the re-
turn hose
Wrong setting for the reli-
ef valve
Correct setting
Relief valve leaks
Replace relief valve
GB
REPAIRS AT THE UNIT
