24Service Manual – SC5000 04 - Control System
Main Controller Operational Modes
The main controller is rmware driven using a micro controller to set operational modes based on machine
input and function. These modes of operation are described below.
• Normal Modes
– Active Scrub
– Recovery only (Wand or regular recovery)
– Disc brush install
– Detergent purge
• Inhibit modes
– Estop – shuts down all systems including drive. Reset with Estop switch. Has icon displayed.
– Impact lock-out – shuts down scrub, solution and recovery system. Has padlock icon displayed. Reset
by power on with supervisor key.
– Low voltage cut-out – has icon displayed
◦ First stage – shuts off scrub
◦ Second stage – shuts off recovery too
– Recovery Tank Full (RTF) – Shuts off scrub solution and vacuum. Has icon displayed.
– Critical Fault – shuts down scrub solution and recovery. Has exclamation triangle icon displayed
Operational Mode Prerequisites
Before the main controller can activate any of the operational modes, it must rst check that the appropriate
prerequisites are met.
• Scrub System Outputs
– Brush Motors M1 and M2 or Deck Actuator M7 (seat switch must be closed to enter scrub mode)
◦ No scrub system fault (brush motors and actuator motor)
◦ No recovery system fault (vac motors and squeegee)
◦ Throttle command not equal to zero
◦ No E-stop inhibit
◦ No impact lockout inhibit
◦ No low voltage cut out inhibit (rst or second stage)
◦ No RTF inhibit
• Recovery System Outputs
– Vac motors M4 and M5 – Recovery mode (Seat switch closed upon entry) or Squeegee Actuator M6
◦ No recovery system fault (vac motors and squeegee)
◦ Throttle command not equal to zero (and not timed out)
◦ No Estop inhibit
◦ No impact lockout inhibit
◦ No low voltage cut out inhibit (second stage)
◦ No RTF inhibit
◦ Note M5 also requires Vacuum option set to dual in conguration menu
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