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)
â—¦ No scrub system fault (brush motors and actuator motor)
â—¦ No recovery system fault (vac motors and squeegee)
â—¦ Throttle command not equal to zero
â—¦ No E-stop inhibit
â—¦ No impact lockout inhibit
◦ No low voltage cut out inhibit (rst or second stage)
â—¦ No RTF inhibit
• Recovery System Outputs
– Vac motors M4 and M5 – Recovery mode (Seat switch closed upon entry) or Squeegee Actuator M6
â—¦ No recovery system fault (vac motors and squeegee)
â—¦ Throttle command not equal to zero (and not timed out)
â—¦ No Estop inhibit
â—¦ No impact lockout inhibit
â—¦ No low voltage cut out inhibit (second stage)
â—¦ No RTF inhibit
◦ Note M5 also requires Vacuum option set to dual in conguration menu
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