23
UNO / DUO BOOSTER BASIC
Original Instructions
7 Trouble Shooting
You have chosen the best quality and therefore deserve the best service. To avoid unnecessary
disappointments, you should check the following before contacting the nearest Nilfisk-ALTO service
organisation:
Symptom Reason Action
Machine will not start > A fuse has blown • Change the fuse.
> Power/plug not connected • Connect power/plug.
> Thermal switches in motor • Let the motor cool. Start
activated the machine and check
that the working pressure is
> Thermal relay switched off not too high and that the
(red lamp is on) mains voltage corresponds
to the specifications.
> Oil shortage in pump • Refill with oil.
DUO BOOSTER: > Water temperature too high • Lower the temperature of the
inlet water to max. 70°C. By-
pass 80°C.
Fuses blow > Installation does not • Change to an installation.
correspond to the ampere corresponding to the ampere
consumption of the machine consumption of the machine
at a minimum.
Change the fuse.
Working pressure too low > Nozzle worn • Replace the nozzle.
> Wrong spray lance • Replace the spray lance
(see section 4.4).
> Reduction valve of spray • Turn reduction valve com-
lance not adjusted to max. pletely counter-clockwise
pressure. (see section 4.4).
> Nozzle partly clogged up • Clean the nozzle
(see section 6.3).
Working pressure fluctuating > Water temperature too high • Lower the temperature of the
inlet water to max. 70°C. By-
pass 80°C.
> Insufficient water supply • Dismount the cabinet and
check that the water tank is
not drained of water during
operation of the machine. If it
is, clean the water inlet filter
of the machine. If that does
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