2019 43 D4OPTRS
CONTROL SYSTEM
GENERAL NOTE:
Control system wiring diagrams have been extensively changed with the new control panel
design (Flip-Up Panel) designated for use in all truck chassis carrying the model DST-4
sweepers. Information on standard and optional sweeper systems has been expanded
to facilitate faster problem analysis and repair. Following TYMCO’s policy of continual
improvement of all sweeper models, TYMCO reserves the right to make minor updates in the
Control System Design without notice or obligation.
FUNCTION
The operator control panel provides for all sweeper functions to be controlled from inside the
cab. The control panel consists of a human-machine-interface or HMI display, one 8 bank
switch pack for the main sweeping functions, several individual discrete switches for lighting
and other auxiliary devices, and an auxiliary engine ignition key switch used to power up the
sweeper and start the auxiliary engine.
User installed “extra” lights or electrical accessories.
Adding circuits to the sweeper control system should be done with the utmost consideration
to the effects on the TYMCO installed electrical wiring. Total current draw should be less than
the installed fuse or circuit breaker. Under no circumstances should the value rating of the
installed fuse or circuit breaker be exceeded.
Added circuits that exceed the current draw of TYMCO Wiring are best controlled through the
use of a relay which can utilize an existing TYMCO wire for the “Switch-on” signal. The main
power for extra circuits should be separately fused.
Failure to follow these guidelines may VOID any warranties applicable as
determined by TYMCO.
WARNING: Before servicing, stop auxiliary engine and remove ignition
key or disconnect negative battery cable.
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