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12.0 Diagnosis of faults and repair EN
Fault Cause Repair
The motor fails to start Oil supply not connected Connect the oil hose
Oil supply closed Open the valve
No oil pressure Start the hydraulic pump
The pump is frozen Let the pump thaw
Working pressure too high Nozzle partly blocked Clean the nozzle
Working pressure too low Valve for regulation of water Open fully the valve for regulation
capacity is not adjusted to max. of water. Turn in the direction
pressure indicated by the arrow
Regulating valve open Close the regulating valve
Irregular working pressure Air in the pump Repeat the venting procedure
During self-priming Suction height too high or water Read the paragraph conc. self-
too hot priming p. 6
Filter blocked Clean the fi lter. See p. 11
During direct water Insuffi cient water supply from Change to a water supply with
connection the water works greater output. If this is not
possible; turn the valve for regulation of
the water capacity in the opposite
direction of that indicated by the
arrow, until the machine works smooth ly.
No working pressure Nozzle blocked Clean the nozzle
No water Check the water connection
High pressure hose/lance frozen Allow the high pressure hose/lance
to thaw
By-pass valve frozen Allow the machine to thaw
Should faults occur other than those mentioned above, please contact the nearest Nilfi sk-ALTO service
or gan i za tion.