Service manual

Electrical Service Manual V4.0
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CENTRAL COMMAND II
Aux 3 = Solution solenoid circuit
The solution solenoid output is turned on and off 2 times per second (2 Hz). The length of
the “On Cycle” is determined by the position of the potentiometer on the control panel if the
machine is so equipped.
Aux 4 = Auxiliary circuit - Varied usage on specific machines
This auxiliary circuit has been used for different items on different machines
250
High Vacuum alert - On the 250 machines we utilize the Aux 4 circuit to turn on the high
recovery light and turn off the vacuum in the event that the recovery tank should become full
or the squeegee hose should become clogged.
390
Under seat fan - On Mid Production 390 machines the Aux 4 was used to run an under seat
fan.
420
Under seat fan- On Mid Production 420 machines the Aux 4 was used to run an under seat
fan.
CONNECTIONS
There are 3 different types of connections that are used on the controller.
MOLEX MINI FIT JR.
The Molex Mini Fit Jr. connectors are used for all of the inputs and the low amperage outputs.
They require special tools to service and replace them. See the “Electrical System” Section
12 for serving information.
AMP TERMINALS
The AMP terminals are specially designed terminals capable of handling high amperage con-
nections. These are used on the high amp outputs on the V.3 controls. See the “Electrical
System” Section 12 for serving information.
BINDING POST TERMINALS
Binding post terminals offer the best connection available and are used for the main battery
terminals on both the V.3 & V.4 controllers. On the V.4 controllers the high output connec-
tions have been changed to the binding post type.