Nilfisk SC800 ST User Manual

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Service Manual: SC750, SC800, SC 750 ST, SC800 ST

Form Number 56043150 Page 28

Soluon Solenoid – Press the Soluon Switch to cycle the soluon solenoid on and o. Listen for the Solenoid to click on

and o. Press the switch again to stop cycling the solenoid. The LCD display for “SOL” will show “On” as long as the test

mode is running; that is when the controller is trying to cycle the solenoid both on and o. The LCD display for “SOL” will

show “O” when the test mode is ended.

Brush Motor Contactor – Press the Scrub On/O Switch to energize the brush motor contactor. Listen for the contactor

to click and look to see if the brushes are rotang. Press the switch again to de-energize the contactor. The LCD display

for “BR” will show “On” when the controller is trying to energize the contactor and “O” when it is not.

Vacuum Motor Relay – Press the Vacuum/Wand Switch to energize the Vacuum Motor Relay. The vacuum motor should

come on. Press the switch again to de-energize the relay. The LCD display for “VAC” will show “On” when the controller is

trying to energize the relay and “O” when it is not.

Detergent Pump – Press the Detergent On/O Switch to cycle the detergent pump on and o. Listen for the pump to op-

erate. Press the switch again to stop cycling the pump. The LCD display for “CP” will show “On” as long as the test mode

is running; that is when the controller is trying to cycle the pump both on and o. The LCD display for “CP” will show

“O” when the test mode is ended.

Input Tests

When in the service test mode the LCD display can be used to validate certain inputs.

Baery Voltage – The LCD will display the baery voltage seen by the Main Machine Controller when in the Service test

mode.

Speed Control Forward/Reverse Signal AND Reverse Signal – The Main Machine controller interprets these two signals

that it receives from the Drive Motor Controller and displays the informaon on the LCD.

• OFF = Neutral

• FWD = Forward

• REV = Reverse

Move the drive paddle in all three direcons. If all 3 values

are displayed correctly both of these inputs are working

correctly.

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Nilfisk SC800 ST Heavy-Duty Cleaning