VendNet 3120-GF12 II User manual

December 1998 P/N 4209514
Rev. C
GLASS FRONT
MERCHANDISER
Covers Models:
3120 – GF12 II
3120A – EC14
3132 – GF19 II
3141 – GF35 II
SERVICE
MANUAL
A10487

ii
TABLE OF CONTENTS
INTRODUCTION .......................................... 1
SPECIFICATIONS........................................ 2
Cabinet Inches Metric............................... 2
Glass......................................................... 2
Electrical.................................................... 2
Capacity .................................................... 2
Pricing ....................................................... 2
UNPACKING & INSTALLATION ................. 2
GROUNDING & ELECTRICAL .................... 3
LOADING PRODUCTS ................................ 3
CHANGING TRAY CONFIGURATION
AND RETIMING............................................ 4
Removing and Replacing Trays ................ 4
Changing Timing ....................................... 4
Product pushers..................................... 4
Retiming GF12 II.................................... 5
Retiming GF19 II and GF35 II................ 5
Changing Tray Configuration .................... 5
GF12 II................................................... 5
GF19 II and GF35 II............................... 5
CONTROLLER FUNCTIONS ....................... 6
Sales Mode ............................................... 6
Service Mode ............................................ 7
Displayed Errors.....................................7
Programming the Controller ...................8
COIN MECHANISM ....................................11
Option Switch Setting...............................11
DOLLAR BILL VALIDATOR.......................12
Removing Accepted Bills .........................13
Troubleshooting .......................................14
Clearing Jams and Cleaning....................14
CARE & CLEANING ...................................14
Cabinet Interior ........................................14
Cabinet Exterior .......................................14
PARTS ORDERING ....................................15
Trays........................................................15
Augers .....................................................15
Procedure ................................................15
To Order by Mail...................................15
To Order by Fax ...................................15
To Order by Phone...............................15
SCHEMATIC – GF12 II ...............................16
SCHEMATIC – GF19 II ...............................17
SCHEMATIC – GF35 II ...............................18
Record the Model Number and Serial Number of your machine below.
The Model and Serial numbers are needed for quick service and parts information for your machine.
The numbers are available on the identification plate located on the back of the cabinet of the machine.
MODEL NUMBER: __________________________________________________
SERIAL NUMBER: __________________________________________________

1
INTRODUCTION
This manual contains instructions, service and
installation guidelines for the Glass Front
Merchandiser II product line.
All Glass Front Merchandisers are equipped with
an electronic control system, which includes a
wide variety of features that can be programmed
and used by the owner/operator as needs arise.
All programming of the vend functions, pricing
and features is done at the controller. Changes
can be made without the need of any additional
accessories or remote parts.
Cash accountability provisions allow the
owner/operator to retrieve information such as
"Total Cash" transactions and "Total Vend"
cycles that have been performed by the vendor.
Electrical malfunctions are recorded by the
controller and are displayed when the machine is
placed in the Service Mode. This notifies the
service person of non-functional motors or
selections.
The vending sequence is "first-in, first-out" for
each selection, eliminating the need for stock
rotation to maintain fresh products in the vend
area. Each selection has an individual motor and
operates independently from other motors.
Each vendor can support a “satellite” vending
machine, such as a Can Vendor, Food
Merchandiser, or Can/Bottle Vendor.
NOTE
In some cases, to attach a satellite vendor
a harness adapter will be required. Refer to
the satellites Service Manual for additional
installation instructions.
The satellite vendor utilizes the Glass Front
Merchandiser’s controller, coin changer, bill
validator (if applicable) and keypad to perform
the vend functions they require.
Each machine is identified by a model number
and a serial number. These identification
numbers appear on the Serial Number Plate
attached to the inside and rear of the vendor.
Record these numbers for your records. All
inquires and correspondence pertaining to this
vendor should reference the model and serial
numbers.
It is recommended that this manual be read
thoroughly to familiarize the service person with
the functions of all components, along with the
features that are available. The initial set-up of a
vending machine is a very important step of
insuring that the equipment operates in a trouble-
free manner. By following the instructions at the
initial installation of the machine, service
problems can be avoided and set-up time can be
minimized.
Should you have any questions pertaining to
information in the manual, replacement parts or
the operation of the vendor you should contact
your local distributor or:
VendNet™
P. O. Box 488
165 North 10th Street
Waukee, IA 50263-0488 USA
PHONE: [phone] USA
1-515-274-3641 INT’L
PARTS FAX: [phone]
SALES FAX: [phone]

2
SPECIFICATIONS
Cabinet Inches Metric
Height 68 173 cm
Depth GF12 II 33 1/2 87 cm
EC14 35 1/2 90.2cm
GF19 II 30 1/8 76.5 cm
GF35 II 30 1/8 76.5 cm
Width GF12 II 21 53.3cm
EC14 21 53.3cm
GF19 II 28 71.1 cm
GF35 II 38 96.5 cm
Lbs kg
Weight GF12 II 341 155
EC14 350 159
GF19 II 391 177
GF35 II 476 216
Glass
Use 1/8-inch (3.175 mm) tempered glass only
Inches Metric
Height All 42.244 107.3
Width GF12 II 9.062 23
EC14 9.062 23
GF19 II 14.187 36
GF35 II 24.687 62.7
Electrical
Power 115 VAC 220 VAC
Cycle 60 Hz 50 Hz
Current 1 Amp 1 Amp
Capacity
80-Select Controller Options:
Up to 80 Snack Selections or
60 Snack Selections &
12 Satellite Canned Drink Selections
Pricing
MDB Coin Mechanism
UNPACKING & INSTALLATION
To minimize installation time and to avoid
service problems due to improper installation,
follow the instructions outlined in this manual.
This machine has been thoroughly inspected
before leaving the factory. The delivering carrier
has accepted this vendor as its responsibility.
Any damage or irregularities should be noted at
the time of delivery and reported to the carrier.
Request a written inspection report from the
claims inspector to file any claim for damage.
File the claim with the carrier (not the
manufacturer) within 15 days after receipt of the
machine.
Carefully remove the outside packing material in
a manner not to damage the finish or exterior of
the machine. Inspect the machine for concealed
shipping damage. Report any damage hidden by
the shipping material directly to the delivering
carrier on a hidden damage report.
Record the model number and serial number of
the vendor for your records. These numbers are
on the Serial Plate on the back or inside of the
cabinet. Refer to these numbers on all
correspondence and inquiries pertaining to this
vendor.
Remove the "Knock-A-Way" skid boards. Place
a 2 x 4 under the vendor, insert a screwdriver or
prying tool into the groove of the Knock-A-Way
and split it in two. Turn the leveling screws in as
far as possible. See Figure 1.
Position the vendor no further than nine feet
(2.74 meters) from the power outlet or receptacle
and check that the door will open fully without
interference.
Level the vendor, making sure all levelers are
touching the floor. The vendor must be level for
proper operation and acceptance of coins through
the coin mechanism. When the vendor is level,
the door can be opened to any position and not
move by itself. Try the door half closed, straight
out and in a wide-open position.

3
Figure 1. Removing the Knock-A-Way
Skid Boards
The keys to the vendor are shipped in the coin
return cup. Open the outer door and remove all
internal packing material.
Consult all local, state and federal codes and
regulations before installation of the vendor.
GROUNDING & ELECTRICAL
Prior to connecting the equipment, the integrity
of the main electrical supply must be checked for
correct polarity, presence of ground and correct
voltage (See Figures 1A and 1B). It is
recommended that these checks be repeated at 6-
month intervals with the routine safety electrical
testing of the equipment itself.
To correct low voltage, amperage, polarity, or
zero ground, consult a licensed electrician.
For 230 V vendors, the power source should be
230 VAC (±10%) 50 cycle, with at least a 10
amp dedicated circuit.
For 115 V vendors, the power source should be
115 VAC (±10%) 60 cycle, with at least a 10
amp dedicated circuit.
Figure 1A. 230V Outlets
Figure 1B. Testing 115V Outlet
LOADING PRODUCTS
To load products, lift the tray slightly and pull
forward until the tray stops. The upper-most
trays of the GF19 II and the GF35 II tilt for ease
of loading. All trays tilt on the GF12 II and
EC14.
NOTE
Refer to the GF12 II tray sections for
adjusting the EC 14 trays.
Load products from front to back, making sure
all items fit freely between the augers. Do not
attempt to force oversize items or packages into
the spaces. Do not skip a space. The bottom of
the package should be placed on the bottom of
the compartment, above the product augers. The
label should face the front of the machine for
easy identification by the customer. See Figure
2.
When finished loading each tray, make sure the
tray is returned to its proper standby position. All
trays must be pushed to the rear of the cabinet
and properly seated in the "detent" position.
Figure 2. Loading the Tray
The size of the item being vended must be larger
than the diameter of the auger being used to vend
properly. Undersized items could cause vend
problems. If the product does not fit the auger
properly, use a different auger or change
between a snack and a candy tray configuration.
A10100

4
CHANGING TRAY
CONFIGURATION AND
RETIMING
Removing and Replacing Trays
To remove a tray from the vendor:
1. Pull out the tray to be removed until it stops.
2. Disconnect the tray harness and undo any
clamps. See Figure 3.
3. GF19 II and GF35 II: Disconnect the main
harness from the tray plug.
GF12 II: Remove harness from slot in right-
side wall and disconnect harness plug.
4. Lift up on the front of the tray and pull
slightly forward (approximately 1/2 inch/1.5
cm) to clear the tray stop.
GF12 II
GF19 II & GF35 II
Figure 3. Tray Harness Connections
5. Lift up on the rear of the tray and remove it
from the vendor.
To replace a tray in the vendor:
6. GF19 II and GF35 II: Place the back of the
tray on the rails by placing its rear rollers on
the left and right rails and lifting up on the
front of the tray as you push it back.
GF12 II: Place the back of the tray on the
rails and lift up to clear the tray stops.
Slide tray into machine until it stops, lift up
slightly on front of tray and push in to lock
into detent position.
7. GF19 II and GF35 II: Connect the main
harness to the tray plug.
Re-clamp the main harness if necessary.
GF12 II: Connect harness plug. Install
harness tubing into slot in right-side wall.
8. Test vend the tray to assure that the tray plug
is properly seated and all motors are
working.
Changing Timing
The shape, size and thickness of product affects
how well it falls off the tray. If vending problems
occur with auger ends at the standard 6 o’clock
position, adjust the drop off either with product
pushers or by retiming the auger.
Product pushers
Order product pushers. P/N 4025748
Snaps on to end of auger. See Figure 4.
Test vend and adjust if necessary.
Figure 4. Product Pushers

5
Retiming GF12 II
GF12 II can be retimed.
1. Remove the tray from the vendor as
previously described.
2. Remove the two screws from the top of the
motor assembly. See Figure 5.
3. Lift up slightly on the motor assembly.
4. Pull the auger away from the motor until the
auger hub separates from the motor shaft.
5. Rotate the auger to the desired position and
reinsert the hub into the motor.
6. Slide the motor assembly down, locating the
tabs in the slots in the bottom of the tray. Be
sure the rib in the tray is locked to the tabs of
the auger coupling.
7. Reinsert the two screws into the top of the
motor assembly. See Figure 5.
8. Replace the tray in the vendor.
Figure 5. GF12 II Motor Mount Assembly
Retiming GF19 II and GF35 II
GF19 II and GF35II can only be retimed to 12
o’clock (factory set at 6 o’clock) – only useful
for very wide products. Use product pushers to
retime end of auger.
1. Remove the tray from the vendor.
2. Pull hair pin clip holding auger to motor hub.
3. Rotate auger 180º.
4. Replace hair pin clip through the auger and
the motor hub.
5. Replace tray in the vendor
Changing Tray Configuration
GF12 II
Order the desired augers. See the Parts Ordering
section of this manual.
1. Remove tray from the machine.
2. Remove motor assembly as described in
Retiming GF12 II. See Figure 5.
3. Remove augers.
4. If necessary, remove motors from motor
assembly. Retain the screws.
5. Move the dividers as necessary.
6. Move motors if necessary.
7. Insert augers.
8. Replace motor assembly as described in
Retiming GF12 II.
9. Replace tray in the machine.
10. Test vend new configuration.
GF19 II and GF35 II
Augers can not be changed, however Snack and
Candy trays are interchangeable. Order the
desired trays from the Parts Department. See the
Parts Ordering section of this manual.
To change from one tray type to the other, the
tray side rails must be moved forward or back in
slots in side walls.
1. Remove the tray from the machine.
2. Unscrew the screw holding the rail to the
side wall.

6
3. Slide the rail forward (for a snack tray) or
back (for a candy tray).
Figure 6. Adjusting a Side Rail
4. Install the screw to hold the rail in place..
5. Install the replacement tray in the machine.
6. Attach the main harness to the tray plug.
7. Test vend the entire tray.
CONTROLLER FUNCTIONS
Sales Mode
The Sales Mode is the normal operating mode of
the vendor.
At the start of a sales cycle, 0.00 displays.
If the coin tube level of the mechanism’s lowest
denomination is below the lowest sensor, the
“USE EXACT CHANGE” LED lights.
As money is deposited, the amount of credit
displays.
NOTE
Upon initial power up or reset, - - - -
displays until the peripherals and the
controller have been initialized.
The customer presses the desired selection
number on the keypad. The selection number
displays.
The controller compares the established credit
with the vend price of that selection.
If sufficient credit is available and the selection
is present, the vend cycle starts.
Following a successful vend, the amount of
change to be returned displays for two seconds
or until all coinage is paid back.
The vend counter is incremented by one and the
cash counter is incremented by the price of the
selection vended.
NOTE
Counter rollover occurs at 99,999,999 for
the number of vends and $999,999.95 for
the total cash sales.

7
If credit is less than the selection price, the price
flashes for three seconds or until a new selection
key is pressed.
If the motor is flagged as faulty, the selection
number and the “MAKE ANOTHER
SELECTION” LED flash for three seconds or
until a new selection key is pressed.
If an item is selected and the vendor is unable to
complete the vend cycle, the “MAKE
ANOTHER SELECTION” LED flashes for
three seconds or until a new selection key is
pressed. That selection is disabled and remains
so until cleared or repaired. The credit is
returned.
When the credit amount equals or exceeds the
highest priced item, the vendor no longer accepts
credit.
NOTE
Credit acceptance is controlled by the coin
mechanism.
Service Mode
To change settings and display diagnostic
information, the controller must be placed in the
Service Mode.
When the controller is placed in the Service
Mode, the number of active motors display. If
any errors were detected during a vend, the failed
motors display next, and then any MDB error
codes. See Table 1 for MDB Error Code
definitions.
NOTE
Record the displayed information
immediately upon entering the Service
Mode. Any keypad input or exiting the
Service Mode will erase this data and the
MDB error codes.
To enter the Service Mode, open the door of the
vendor and press the Service Mode Button on the
Control Board on the inside of the door. See
Figure 7.
Figure 7. Service Mode Button Location on
Control Board
To exit the Service Mode, press the Service
Mode Button. The vendor will also exit the
Service Mode if there is no key pressed for
approximately 25 seconds.
If you are in the process of changing data when
you exit the Service Mode (either by pressing the
Service Mode Button or by allowing the system
to time-out) any unsaved changes will be
ignored, leaving the data in its previous state.
Displayed Errors
Motor Configuration Errors
NOTE
Record the displayed information
immediately upon entering the Service
Mode. Any keypad input or exiting of the
Service Mode will erase this data and the
MDB error codes.
When the controller is placed in the Service
Mode, any errors or failed motors that were
detected during a vend will display. The
displayed motors were functional when the Sales
Mode was last activated, but, due to failures or
removal, are not in the circuit now.

8
For instance, if during a vend the controller
detected a motor switch failure, that selection
would be flagged as faulty and would be
disabled. That motor would display the next time
the Service Mode is entered.
MDB Errors
NOTE
The following errors are only displayed
when the Service Mode is entered. Record
the displayed information immediately upon
entering the Service Mode. Any keypad
input or exiting of the Service Mode will
erase the MDB error codes.
Table 1. Error Codes
DISPLAYS INDICATES
CScF Invalid mechanism scale factor
tSnS Defective coin tube mechanism
CJAM Coin jam detected
tJAM Coin tube jam detected
CnEr Coin acceptance problem detected
AcEr Acceptor unplugged
ChEr Coin mechanism ROM checksum bad
bScF Invalid acceptor scale factor
bSnS Defective bill sensor
bJAM Bill jam detected
StFL Bill stacker is full
CShb Bill cash box is out of position
bMtr Bad bill motor detected
bLEr Bill acceptor ROM checksum bad
rScF Invalid card reader scale factor
CdEr Card error detected
bCrd Invalid card detected
rJAM Card reader jam detected
CoEr Communications error detected
brdr Card reader failure
Programming the Controller
To access the programming, enter the Service
Mode, then choose from the following modes.
Table 2. Modes
PRESS DISPLAYS MODE
[ 1 ] Coin Coin Dispense
[ 2 ] Motor Count
[ 3 ] Acct Accountability
[ 4 ] Prc Price Setting
[ 5 ] Slct Test Vend Single Motor
[ 6 ] Test Vend All Motors
[ E ] Optn Vend Options
[ B ] ºDeg
(temperature)
Refrigeration Control
(not used on this machine)
Coin Dispense Mode
In the Coin Dispense Mode, coins stored in the
coin mechanism payout tubes can be removed.
Press the Service Mode Button, then press [ 1 ].
Coin displays. See Table 3.
Table 3. Coin Dispense Keys
PRESS TO DISPENSE A COIN OF:
[ A ] the lowest denomination
[ B ] the next higher denomination
[ C ] the next higher denomination
[ D ] the highest denomination
Pressing a key once will pay out one coin.
Pushing and holding a key will allow the coins to
pay out at a rate of approximately two per
second. Coins will continue to be dispensed from
the payout tube as long as its activating key is
pressed.
Pushing any key other than [ A ], [ B ], [ C ] or
[ D ] will exit back into the Service Mode.