Control System
17
Service Manual – Focus II / Scrubtec R6 Rider Autoscrubber
and the solution and vacuum systems will turn on. The brushes will turn on and the scrub deck will continue
to lower until the expected motor amperage is reached.
Brush Pressure Increase and Decrease Switches (H & K):
When scrub mode is active, pressing these
switches will increase or decrease the scrub brush pressure. The three indicator LEDs
(H)
will illuminate to
represent High, Medium, and Low pressure settings.
Solution Switch (O):
The solution system will be active when the Scrub On/Off system is engaged.
Pressing this switch will cycle through the solution rates (Normal, Medium, High, and Off). The solution
flow will turn on only when the machine is in forward transport. The solution flow will turn off if the throttle
returns to neutral or reverse transport is active. Pressing this switch when the scrub system is off will
momentarily turn the solution flow on to allow pre-wetting of the scrub brushes.
Vacuum Switch (Q):
The vacuum system will be automatically active when the Scrub system is active.
This switch is used to toggle the vacuum system on or off independent of whether the scrub system is active
or not.
Detergent Switch (R):
The detergent injection system is an optional accessory. The detergent pump is
active only when the solution pump is active. Pressing this switch will cycle through the detergent ratios.
Main Machine Controller
The Main Machine Controller
(A1)
, which includes
the control board and the display, is the primary
electronic control for the Focus machine and its
functions (except drive control). The control board is
the basic input/output device and contains a micro-
controller chip to regulate function. The controller
receives and interprets user inputs, sensor inputs,
and even some motor amperage readings, and
controls device output for the user display, solenoid
operation, and motor control. Most low and medium
power outputs are controlled with power MOSFET
transistors, and very high power devices (vacuum
and brush motors) controlled with external motor
contactors.
Another function of the Main Machine controller is
to detect any system failures and display an error code on the display panel or store it in the main control
board’s memory. The error code(s) are used to help the service person determine the fault and to quickly
guide in repairing a specific system malfunction. An additional special feature of the main control board is
to change program settings for a set of specific machine functions. See the section,
described on page 19 for further information.
J1 Connector
J2 Connector
Key Switch
J3 Connector
