APi 748 V1.1 406
2.4
77500001
Back
MAJOR COMPONENTS
748 Machine Controller
The 748 Machine Controller controls and monitors
the 748’s performance. It also:
keeps track of real time
controls the vend process
monitors food compartment temperatures
stores prices, option settings, and scheduled
events
records specific events and error messages
accumulates cash and sales data
controls the other four major components:
Message
Center
Credit
Module
Column Price Displays
Refrigeration/Turret
Module
Message Center
The Message Center contains a 20-character
vacuum fluorescent display for customer
messages and prompts, turret rotation keys, and
selection number keys. The selection number
keys are also used in Service Mode to perform
service mode functions.
Credit Module
The Credit Module will interface the 748 Machine
Controller to various credit devices including coin
changers, bill validators, and card readers. It can
support several different credit device interfaces
including pulse, serial, MDB, and Protocol A.
Column Price Displays
The Column Price Displays are the five-digit
vacuum fluorescent displays down the center
column of the machine. These displays will show
pricing and status of selection compartments.
Refrigeration/Turret Module
The Refrigeration/Turret Module controls the
modular refrigeration unit in the 748 and reports
the temperature to the 748 Machine Controller. It
also drives and monitors the turret motor and half
cycle switch as commanded by the Machine
Controller.
Main Power Switch Assembly
This assembly is located in the bottom left corner
of the cabinet. It houses the Main Power ON/OFF
switch along with the Refrigeration Interlock
Power Switch, a switch which opens the
refrigeration circuit to prevent frost buildup
whenever the main door is open. It also contains
two circuit breakers to protect the machine from
an overload.
Service Switch
This switch is located along the inside edge, on
the hinge side of the Main Door. It is a momentary
rocker switch that can be used to rotate the turret
when cleaning or filling the machine with product.
Main Door Interlock Switch
This switch is located on the inside of the main
door near the cash box. It will open when the main
door is open or ajar. This switch must be closed
when the coin mech compartment door is closed
to prevent an error.
Storage Shelf Assemblies
A four-shelf storage rack is located along the right
wall of the cabinet. This rack is intended to store
nonperishable pre-cooled products to be used at
the next servicing.
Turret
The turret can be rotated in both directions using
the turret rotate keys on the Message Center. At
each subsequent power up, the turret
automatically rotates until the 748 Machine
Controller senses that the turret is at the “home”
position. If the turret is already “home” or any door
is open (delivery, main or coin mech
compartment), it will not rotate on power up.
Electronic Digital Thermometer
The electronic temperature sensor is located in
the return air compartment of the evaporator
under the evaporator screen. The temperature
sensor is used to monitor the temperature of the
cabinet interior (food compartment) by the
Refrigeration/Turret Module, which in turn,
controls the refrigeration unit and reports the
temperature to the 748 Machine Controller. The
Machine Controller uses the reported temperature
to run the Health Control feature. Should the
Refrigeration/Turret Board fail, the temperature is
controlled by manual thermostat located on the air
return plenum of the refrigeration unit.
To read the interior cabinet temperature while the
machine is running in the vend mode, push
HOT
KEY 1
(push and hold the [RESET] button then
push the [1] button).
See page 2.1 for a description of all Hot Keys.
Summary of Contents for Showcase 748
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