Nilfisk SC800 ST User Manual

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

Form Number 56043150 Page 40

9. Remove 4 screws securing the Main Machine Controller and remove it from the cover.

10. Reassemble in reverse order, taking care not to damage the printed circuit ribbons used to connect the circuit

board to the control switch interface panel.

11. Set Mandatory Program Opons - IMPORTANT! When a new controller is installed, it must rst be told how the

machine is equipped before it will work. The rst me the key is turned on, the controller wakes up in the pro-

gramming opon mode to “force” you to complete the sengs. In this special case, you will be walked through

seng the Scrub Deck Type and Baery Charger Selecon before the machine will operate. See Programming

Opons – SC750 ST and SC800 ST Models (Control Panel with rocker switches) - Mandatory Program Opons.

Main Machine Controller SC750 ST and SC800 ST Models (Later Build)

Minor changes were made to the electrical panel cover and circuit breaker panel to make the machine easier to

service. Follow the instructions for “Main Machine Controller SC750 and SC800 Models (control Panel with

membrane switches) Later build “ with the realization that some of the photos will not exactly match the ma-

chine you are working on.

Main Machine Controller SC750 and SC800 Models (Early Build)

Note: Electronic devices like the Main Machine Controller are sensive to Electrostac Discharge (ESD). Before handling

the controller, touch a metal bench or shelf to discharge any electrical charge that may have built up in your body. Do not

walk around with a controller in your hands.

1. Completely drain soluon tank. This is important for the soluon level sensor to work properly upon reassembly.

2. Turn o and remove key.

3. Disconnect Handle electrical connector. Remove top two handle bolts and loosen the lower two. Rotate Handle

Assembly down.

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Nilfisk SC800 ST Heavy-Duty Cleaning