Operating instructions

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Operation
F232223
14
Introduction
This control is composed of the electronic control unit
and the control fuse board. Beyond this, there are
wiring harnesses associated with the control. Only an
authorized person should ever look inside the machine.
Before accessing the control components, first TURN
OFF POWER, then open the lid.
Electronic Control Unit
This portion of the control contains the
“intelligence” – namely, the micro-controller and the
miscellaneous components on the printed circuit (PC)
board. The board has a metal cover, which MUST be
in place at all times during machine operation.
Operation of the machine without this cover installed
will void the warranty.
The control unit monitors and responds to input, gives
information about the status of the machine (which the
control operates), and it monitors and responds to
inputs from the user interface. The control provides
signals to the control output unit, which in turn
operates the components that control the machine
functions. This is located behind the machine control
panel.
Control Output Fuse Board
This portion of the control contains the power supply
for the control unit, and also the switching devices that
power the components in the machine, all of which are
on the output PC board. The output board has a cover
for back of hand protection. It must be in place at all
times during machine operation. The switching
devices are controlled by the control unit, and are solid
state components which provide two important
benefits: 1) elimination of all the problems associated
with electromechanical switching (contact wear,
arcing and electromagnetic interference, etc.) with
subsequent increased component life, and 2) enhanced
electrical isolation of the control unit and the AC
switching components.
Harnessing
Wiring harnesses are modular – harnesses common to
various configurations are similar, while those specific
to a certain configuration can be added. There are
harnesses for inputs to the control unit, for outputs
from the control power/output unit to the machine
components, and for the main incoming power to the
control power/output unit.