L0086, Rev. H
AMS SENSIT 3 GLASS FRONT VRM
3-2
3.4 DOOR
3.4.1 Validator & Debit Card Reader Locations
There are two locations that will accept bill validators
and/or debit card readers (Refer to Section 4.2.2). The
lower position meets the guidelines of the Americans with
Disabilities Act (ADA) for access by handicapped persons.
3.4.2 Changer Location
Three screws are installed in the door below the
coin chute. These screws mate to the keyhole slots on the
back of the coin changer (Refer to Section 4.2.3).
3.4.3 Coin Box
The coin box is located below the changer, behind a
separate door, and is used to hold overflow coins when the
changer is full. It is removed by tilting slightly and lifting
out.
3.4.4 Door Switch
The door switch is mounted on the back of the door.
The control uses the door switch to turn off the
refrigeration unit when the door is open, and to switch from
service mode to vend mode when the door is closed.
3.4.5 Display
The display is located on the front of the door. It
serves as the interface for using and programming the
machine. In service mode, it displays the active function
and parameter values. In vend mode it can display the
selection entered, the price of a selected item and the
credit accumulated. When the machine is idle it can
display the time and a scrolling message.
When the asterisk key is pressed the display also
indicates the chiller status. One of the highlighted
characters listed below will be shown in the lower right
corner of the display.
-
= Chiller off due to open door
V
= Chiller off due to low voltage
D
= Chiller off due to defrost timer
P
= Chiller off due to pressure timer
%
= Chiller can run, subject to temperature,
set-point and EnergySENSIT
The number displayed before the % sign indicates the
% of time the compressor has been running in the
previous 4 hours.
In case there are multiple reasons for a chiller not
running, the display will show the foremost reason listed
(i.e., door open takes precedence over low voltage).
3.4.6 Keypad
The keypad is located below the display on the front
of the door. A vending selection is made by keying in the
number combination that corresponds to the location of an
item in the machine. The keypad is also used to enter
data in operation and servicing of the merchandiser
3.4.7 Coin Return Button
The coin return button is located next to the coin slot.
Pressing the coin return button will release bent or
irregular coins that are not accepted by the changer. If the
machine fails to vend a selection that has been made,
pressing the coin return will return the full credit. If the
Force Vend option is disabled, it can also return the full
credit before a selection is made. If the Bill Changer option
is enabled, the coin return will return change for bills
inserted in the bill validator.
3.4.8 Lighting Options
Several lighting options, depending on the model
and size of the merchandiser, are available. All options are
intended to illuminate the products displayed on the trays.
Options include single or dual fluorescent lamps, and
single or dual LED lamps with ajustable brightness control.
3.5 REFRIGERATION (CHILLER) SYSTEM
3.5.1 Temperature Control
The evaporator fan runs continuously to circulate air
within the cabinet. A temperature sensor located near the
evaporator measures the temperature of air entering the
evaporator. When this temperature is above the
temperature setting in the control, the compressor and
condenser fan are turned on.
When the temperature falls to 4°F below the
temperature setting, the compressor and condenser fan
are turned off (Refer to Section 6.5).
3.5.2 Refrigeration Controls
1. The refrigeration system is operated through the
control board. A temperature sensor in the cabinet
relays the current temperature to the control.
2. If the temperature is above the setting that has been
programmed in by the user, the control sends a 24VDC
signal to the refrigeration relay. The energized relay
closes to complete the high voltage circuit that powers
the compressor and the condenser fan.
3. If the compressor should overheat, a thermal overload
removes power to the compressor until it has cooled.
4. To protect against evaporator freeze-up, after one hour
of continuous running the compressor will be shut off
for 7.5 minutes to allow for defrosting
5. When the temperature in the cabinet reaches 4°F
cooler than the temperature setting, the control de-
energizes the relay breaking the circuit powering the
compressor.
6. The control will also shut off the compressor if the door
is opened. This is to prevent the fan from drawing in
outside air which may freeze up.
7. After the compressor has shut down, the control will
wait until the compressor has been shut down 3
minutes and if applicable, the door has been closed 10
seconds before restarting the compressor. The delay
allows pressure in the system to equalize.
3.6 TRAY RAILS
The rails are located inside the cabinet and are used
to support the trays. The rails are adjustable up and down
in 1” increments (Refer to Section 5.3).
3.7 TRAYS
3.7.1 Vend
Motors
Two types of motors may be used with this
merchandiser. The configuration of the machine will be
different if all of one or another is used, or if there is a mix.
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