12 Selection snack    

Vending machine
Service Manual 

Models: 

3120, 3120A, 3132, 3141 

INTRODUCTION 

This manual contains instructions, service and installation guidelines for the 12 Selection Snack Vending Machine 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 vending machine.  

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 vending machine can support a "satellite" vending machine, such as a Can Vending Machine, Food Vending Machine, or Can/Bottle Vending machine.  The satellite vending machine utilizes the Glass Front Merchandiser's controller, coin changer, bill changer (if applicable) and keypad to perform the vend functions they require.  

note 

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 vending machine. Record these numbers for your records. All inquires and correspondence pertaining to this vending machine 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 vending machine you should contact your local distributor or: 

VendNet™ 

P. O. Box 488  

165 North 10th Street  

Waukee, IA 50263-0488     USA  

PHONE:         1-800-833-4411  USA     

                   1-515-274-3641  INT'L

PARTS FAX:   1-515-987-4447 

SALES FAX:   1-515-274-0390 

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 vending machine 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 vending machine 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 vending machine. 

Remove the "Knock-A-Way" skid boards. Place a 2 x 4 under the vending machine, 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. 

Position the vending machine 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 vending machine, making sure all levelers are touching the floor. The vending machine must be level for proper operation and acceptance of coins through the coin mechanism. When the vending machine 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.  The keys to the vending machine 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 vending machine. 

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.  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 vending machines, the power source should be 230 VAC (±10%) 50 cycle, with at least a 10 amp dedicated circuit. 

For 115 V vending machines, the power source should be 115 VAC (±10%) 60 cycle, with at least a 10 amp dedicated circuit. 

LOADING PRODUCTS

To load products, lift the tray slightly and pull forward until the tray stops. The upper-most trays of the 19 select snack and the 35 select snack vending machine tilt for ease of loading. All trays tilt on the 12 Selection Snack Vending Machine.  

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. 

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. 

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. 

Changing Tray Configuration and Retiming

Removing and Replacing Trays

To remove a tray from the vending machine: 

1.      Pull out the tray to be removed until it stops. 

2.      Disconnect the tray harness and undo any clamps. See Figure 3. 

3.       12 Selection Vending Machine: 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. 

5.      Lift up on the rear of the tray and remove it from the vending machine. 

To replace a tray in the vending machine: 

6.      12 Selection Vending Machine: 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.      12 Selection Vending Machine: 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. 

12 Selection Snack Vending Machine

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

Retiming 12 Selection Vending Machine

1.      Remove the tray from the vending machine 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 vending machine. 

Figure 5.  Motor Mount Assembly 

Changing Tray Configuration

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. 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. 

9.      Replace tray in the machine. 

10.  Test vend new configuration.

Figure 6. Adjusting a Side Rail

CONTROLLER FUNCTIONS 

Sales Mode

The Sales Mode is the normal operating mode of the vending machine.  

At the start of a sales cycle, 0.00 displays.  

If the coin tube level of the mechanisms lowest denomination is below the lowest sensor, the "USE EXACT CHANGE" LED lights. 

As money is deposited, the amount of credit displays. 

NOTE 

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 

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 vending machine 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 vending machine no longer accepts credit. 

NOTE 

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 displays. 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 

To enter the Service Mode, open the door of the vending machine 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 vending machine 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 

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.  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 

Table 1.  Error Codes

Programming the Controller

To access the programming, enter the Service Mode, then choose from the following modes. 

Table 2.  Modes

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

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. 

Motor Count Mode

The Motor Count Mode displays the total number of functional motors configured within the machine. This number should equal the total number of selections. Only the total number of functional motors displays; individual selection numbers do not display. 

Press the Service Mode Button, then press [ 2 ]. The controller tests each motor in the configuration.  

If the motor count displayed does not agree with the total number of selections in the machine, the electrical circuit of all motors is not complete.  

To exit, press the Service Mode Button once.  

To determine which motor is not functioning: 

Were faulty motors displayed when placed in the Service Mode? 

Test vend single selections. 

Test vend all selections. 

Refer to the "Troubleshooting" section of this manual for further assistance. 

Accountability Mode

The total vends and total cash are displayed. This information is not re-settable. The display will continue to flash the accounting data until the mode is exited.  

Press the Service Mode Button, then press [ 3 ].  Acct displays.  

For the Vend Count, press [ A ]. The first four digits of an eight digit number display. Then, the last four digits will display.  

For the Cash Total, press [ B ]. The first four digits of an eight digit number display. Then, the last four digits (including any decimal point) display.  

To exit, press another function key or press the Service Mode Button. 

Price Setting Mode

A vend price must be set for each selection. The price programmed must match the desired item and price scroll. To check a price, push the selection numbers while in the Sales Mode. 

Press the Service Mode Button, then press [ 4 ]. Prc displays. 

Price Setting Mode

A vend price must be set for each selection. The price programmed must match the desired item and price scroll. To check a price, push the selection numbers while in the Sales Mode. 

Press the Service Mode Button, then press