Nilfisk-Advance America RS 501 Manuale Utente

33015500(3)2008-02

The suction fan turns but it is not effi cient
Possible causes:

The fi lters are clogged (clean).
The suction hose is clogged (clean).
The suction hose is cut/torn (replace).
The gasket between the suction inlet and the hopper is broken or misadjusted (replace or adjust).
The hopper lid gasket is broken (replace).
There is no pressure at the suction fan motor drive pump (adjust the pump pressure).

The suction fan does not turn
Possible causes:

The motor is faulty (replace).
The control valve assembly is stuck (repair).
The pump is faulty (replace).

The suction inlet does not collect debris effi ciently
Possible causes:

The suction inlet position is incorrect (check the suction inlet and skirt height and effi ciency).

The skirt opening force is not suffi cient
Possible causes:

The skirt opening pressure is incorrect (adjust).

The hopper does not lift/lower
Possible causes:

The control valve assembly is stuck (repair).
The cylinder gaskets are worn (repair the cylinder).

The rear lid does not open/close
Possible causes:

There is no voltage in the actuator (repair the electrical system).
The actuator is faulty (repair/adjust the actuator cams).

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