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8 Trouble-shooting
To avoid unnecessary disappointments, you should check the following before contacting the Nilfi sk-
ALTO service organization:
Symptom Cause Recommended action
Machine refuses to start Machine not plugged in Plug in machine.
Defective socket Try another socket.
Fuse has blown Replace fuse. Switch off other machines.
Defective extension cable Try without the extension cable.
Fluctuating pressure Pump sucking air Check that hoses and connections are air-
tight.
Valves dirty, worn out Clean and replace or refer to local Nilfi sk
or stuck ALTO distributor
Pump seals worn out Clean and replace or refer to local Nilfi sk-
ALTO distributor.
Motor busses Low voltage or Activate the trigger of the spray gun.
low temperature
Machine stops Fuse has blown Replace fuse. Switch off other machines.
Incorrect mains voltage Check that the mains voltage corresponds
to specifi cation on the model tag.
Thermal sensor activated Leave the washer for 5 minutes to cool
down.
Nozzle partially blocked Clean the nozzle (see section 7.2)
Fuse blows Fuse too small Change to an installation higher than the
amp. consumption of the machine.
You may try without the extension cable.
Machine pulsating Air in inlet hose/pump Allow machine to run with open trigger until
regular working pressure resumes.
Inadequate supply of Check that the water supply corresponds to
mains water specifi cations required (see model tag)
NB! Avoid using long, thin hoses (min. 1/2")
Nozzle partially blocked Clean the nozzle (see section 7.2)
Water fi lter blocked Clean the fi lter (see section 7.1)
Hose kinked Straighten out hose.
Machine often starts Pump/spray gun is Contact your nearest Nilfi sk-ALTO Service
and stops by itself leaking Centre.
Machine starts, but Pump/hoses or accessory Wait for pump/hoses or accessory to thaw.
no water comes out frozen
No water supply Connect inlet water.
Water fi lter blocked Clean the fi lter (see section 7.1)
Nozzle blocked Clean the nozzle (see section 7.2)
In case problems other than the above occur, please contact your local Nilfi sk-ALTO distributor.