American-Lincoln Technology
5
SMART 2000 Electrical Troubleshooting Guide
BRUSHES AND SOLUTION OFF IN NEUTRAL CIRCUIT
Conditions necessary for circuit to work
1 - Battery voltage >32.5Vdc
2 - Key switch on in IGN or ACC mode
3 - CB-6,CB-7, & CB-11 closed
Scrub deck lowers when contactor 15A is energized by:
1- Scrub deck Switch placed from the Up(raise) position to the middle(Normal Down) position.
OR
2- Scrub deck Switch placed from the Up(raise) position or the middle(Normal Down) position to the
lower(Heavy Down) position
AND
While 15A is Energized the deck will lower until the corresponding Normal Down or Heavy Down Prox
switch is made opening the circuit & de-energizing 15A
Scrub deck raises when contactor 14A is energized by:
1- Scrub deck Switch placed from the middle (Normal Down) or the lower (Heavy Down) position to the
Up (Raise) position
OR
2- When scrub deck switch in lower (Heavy Down) and the Overload Prox switch is activated by over
travel of the deck.
SCRUB DRIVE CONTROL
1 - Battery Voltage >32.5V
2 - Key Switch On in Ign or ACC position
3 - Scrub deck in Normal or Heavy Down position
4 - Contactor 8A energized
Scrub Deck Control Contactor 8A is energized with the above conditions met when:
-M12 is energized by either the forward or reverse foot pedal proximity switch being activated.
(this prevents operation in neutral)
AND
-TD2 is energized (Requires battery Voltage >32.5Vdc)
AND
-Relay SPD2 is de-energized (Squeeggee Interlocks prevents both Squeegge motor & Brush motors
from starting together to prevent low voltage fault of squeeggee due to excesive in rush)
AND
-M10 is De-energized (Scrub deck Interlock to verify Scrub deck Switch is NOT in the top (UP request)
position.
SCRUB DECK AND DRIVE CONTROL
