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USER MANUAL
34
33015501(3)2008-02 A RS 501
TROUBLESHOOTING
The following table shows the most common problems that may arise when using the machine, the possible causes and the
suggested remedies to solve them.
NOTE
The sweeper is equipped with 3 “minitest” plugs (1, 2 and 3, Fig. AN) to measure the hydraulic pressure on the
component.
WARNING!
The suggested remedies must be performed by qualifi ed personnel, according to the instructions shown in
this Manual, if present, otherwise contact a Nilfi sk-Advance Service Center, where it is possible to consult the
Service Manual.
For explanation or information, contact a Nilfi sk-Advance Service Center.
PROBLEMS AND REMEDIES
Problem Possible cause Remedy
BROOMS
The brooms do not clean correctly The brooms are not adjusted correctly Adjust
The brooms do not rotate
The broom speed is not correct Adjust the speed
There are oil leaks from the hydraulic system
fi ttings/hoses
Repair/replace
The motor is faulty Replace
The accessory system pump does not
pressurize the oil in the circuit
Check the oil pressure in the hydraulic system
SUCTION FAN
The suction fan is noisy The motor is faulty Repair
The suction fan turns but it is not effi cient
The dust fi lters are clogged Clean
The suction pipe is clogged Clean
The suction pipe is cut/torn Replace
The gasket between the suction inlet and the
hopper is broken or misadjusted (replace or
adjust)
Replace/adjust
There is no pressure at the suction system
motor
Adjust the pump pressure
The suction fan does not turn
The control valve assembly is stuck Repair
The motor is faulty Replace
Pump failure Replace
SUCTION INLET AND SKIRT
The suction inlet does not collect debris
effi ciently
The suction fan is not engaged Engage the suction fan
The suction inlet position is incorrect
Check the suction inlet and skirt height and
operation
The suction inlet does not lift
The control valve assembly is stuck Repair
The cylinder gaskets are worn Overhaul the cylinder
There is no pressure at the hydraulic system Check the pump pressure
The suction inlet does not lower There is no pressure at the parachute valve
Check the suction fan control valve assembly
pressure
The skirt opening force is not suffi cient The skirt opening pressure is incorrect Adjust the opening pressure
The skirt does not open/close
The switch is deactivated Activate
The solenoid valve is burnt Replace