Operation Manual

21
UNO / DUO BOOSTER EXTENDED
Original Instructions
Symptom Reason Action
Working pressure fl uctuating is insuffi cient.
(continued) NB! Avoid long, thin hoses
(min. 3/4").
> High pressure hoses too long • Dismount high pressure
extension hoses and retry.
Extension hose max. 50 m.
NB! Avoid long extension
hoses with many couplings.
> Wrong nozzle • Replace lance.
> Air in the system • Vent the system
(see section 3.7).
> Water inlet fi lter clogged up • Clean fi lter (see sect. 6.2).
No working pressure > Nozzle clogged up • Clean nozzle (see sect. 6.3).
> No inlet water • Check that the shut off cock
of the water inlet is open.
Check that the water supply
meets the requirements
(see section 1.2).
> High pressure cock of outlet • Close all high pressure
point open. cocks not in use.
Machine starts and > Leaky hose/ • Repair leak.
stops pipeline/spray handle
Machine stops > Water defi ciency • Check that the shut off cock
(red lamp fl ashes) of the water inlet is open.
Check that the water supply
meets the requirements
(see section 1.2).
• Check the water inlet fi lter.
> Oil shortage in pump • Replenish with oil.
> Expiry of stand-by time • Restart the machine.
> Thermal switches in motor • Let the motor cool. Start
activated (red lamp fl ashes) the machine and check
that the working pressure is
> Thermal relay switched off not too high and that the
(red lamp fl ashes) mains voltage corresponds
to the specifi cations.
> Water temperature too high • Lower the temperature of the
(red lamp fl ashes) inlet water to max. 70°C. By-
pass 80°C.
Should other malfunctions occur than those mentioned above, please contact your nearest Nilfi sk-
ALTO service organisation.