Suction Fan - Nilfisk RS 1301 Betriebsanleitung, Originalanleitung

Problem
BROOMS
The brooms are not switched off when the
engine exceeds its maximum operating
speed.
When the 3rd broom is turned on,
the operation of the main brooms is
interrupted.

SUCTION FAN

The suction fan is noisy.
The suction fan turns but it is not effi cient. The dust fi lters are clogged.
The fan is turning, but the display does
not switch to rpm visualisation.
The suction fan does not turn.
Check that K5 is working properly, namely that it is not shutting off the solenoid valve power supply.
The K5 relay coil is intact.
The connections are correct, but the display does not provide output once the engine exceeds the
maximum threshold set.
Check that the broom rotation switch is properly connected. Check the integrity of diode D2 (P600)
and if necessary replace it.
The fan bearings are not lubricated.
The fan bearings are worn.
The motor is faulty.
The suction hose is clogged.
The suction hose is cut/torn.
The gasket between the suction inlet and the hopper is broken or misadjusted.
There is no pressure at the suction fan motor drive pump.
The signal for activation of working mode (indicated by the broom) is conveyed to the display via diode
D4. This diode is also used to provide a reference for the water level relay.
The distributor is stuck.
The switch is set in the AUTO mode and the operator has left the driver's seat.
The operator is on the driver's seat and automatic mode has been set, but the fan does not start.
The fan is in AUTO mode, but the switch is not illuminated; the operator has sat down, the broom
switch has been pressed but does not lit up, and thus either the brooms or the fan is not working.
The engine speed is too high.
The engine speed is correct. The fan switch does not turn on for the AUTO and MAN fan positions
whereas it normally lights up when activating the optional equipment (high pressure pump).
The connections are intact, but the switch is not being powered properly.
The fuse F07 is intact.
The fan is in AUTO mode, with the operator on the driver's seat, and the broom switch pressed and lit,
but either the broom or the fan are not working.
The result of driver's seat microswitch diagnostic is positive: relay K16 is working properly and has
restarted after 3 seconds once the operator has resumed is position on the driver's seat.
Relay K21 is not activated but pin 86 is powered.
Relay K21 is activated regularly, but there is no voltage on pin 87.
Relay K21 is active and there is voltage on pin 87.
The fan is in AUTO mode, with the operator on the driver's seat and the broom switch pressed and lit,
the brooms are rotating, the display is in working mode, but the fan does not work.
The lifted hopper warning light turns on.
The lifted hopper warning light is off, the fan is not rotating and sweeper allows for full power during
shifting.
The lifted hopper warning light is off, the fan is not rotating and sweeper allows for limited power
during shifting.
The fan is in AUTO mode, with the operator on the driver's seat and the broom switch pressed and lit,
the brooms are rotating, the display is in working mode, but the fan does not work.
The open door warning light is on.
The open door warning light is off.
There is voltage on the pin.
There is no voltage on the pin.
Relay K21 is not turned on because the machine control board has no output even if it has input of the
currently active command.
The engine is faulty.
The pump is faulty.
RS 1301
USER MANUAL
Possible cause
33018310(3)2010-01 A
ENGLISH
57