Vollrath Stoelting E111I, Service Manual

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SECTION 6
ELECTRICAL AND MECHANICAL CONTROL SYSTEMS
NOTE
The wiring diagram is available in Section 8.
6.1 INTELLITEC CONTROLLER
Understanding the modes of operation and individual con-
trol settings will make servicing the control straight forward.
A. COMPONENTS OF CONTROLLER
The IntelliTec control consists of three main components;
the control board (Figure 6-1), the membrane switch
(Figure 6-2), and the display panel module (Figure 6-3).
The membrane switch is connected to the display panel
module via a 9-pin ribbon cable. The display panel module
is connected to the IntelliTec control board through a
telephone cord. The IntelliTec control board is connected
to the machine through an 8-pin connector, a 7-pin con-
nector, and a 6-pin connector.
6.2 CONTACTORS
The contactors are mounted behind the right side panel.
There is a contactor for the compressor and a contactor for
the drive motor.
The IntelliTec control sends electronic signals to trigger the
contactors. The signals to the contactors are staggered, so
the drive motor will always start and stop three seconds
before the compressor. By staggering the starting and
stopping of the drive motor, maximum starting torque is
available and voltage spikes are reduced.
Figure 6-3 Display Panel Module
Figure 6-1 IntelliTec Control Board
Figure 6-2 Membrane Switch