12 Selection drink    

Vending machine
Service Manual 

Model: 3151 

INTRODUCTION 

This manual contains instructions, service and installation guidelines for the Convertible Bottle/Can product line. 

All models are equipped with an electronic control system. All programming of the vend functions, pricing and features is done at the controller. Changes can be made without any additional accessories or remote parts. 

Selections can be priced individually from $.05 to $99.95 in five cent increments (U.S. currency). When adapted to accept international or foreign currency, the maximum vend price will be 255 times the smallest denomination of coin being accepted. 

Features include: 

·         Self-diagnostics and cash accountability 

·         Multi Vend and Free Vend features 

·         Hermetically sealed refrigeration system with R-134a refrigerant 

·         Programmable electronic control of the refrigeration unit 

·         Motorized delivery, electronically controlled 

·         Visual feedback indicates when a product has been vended
or when an error condition exists 

·         No change or loss of program/memory because a power failure  

·         Cash accountability records Total Cash transactions and Total Vend cycles performed by the vending machine. Information for individual selections, complete range (columns), or total machine can be compiled and used for inventory and ordering records. 

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.  

Read this manual thoroughly to become familiar 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. Following the instructions during the initial installation of the machine will avoid service problems and minimize set-up time. 

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™ 

165 North 10th Street 

Waukee, Iowa 50263 - USA 

Phone: 515-274-3641 

Parts Fax: 515-987-4447 

Sales Fax: 515-274-0390 

E-Mail: vendnet@vendnetusa.com 

UNPACKING 

This vending machine was thoroughly inspected before leaving the factory and the delivering carrier has accepted responsibility for this vending machine. Note any damage or irregularities at the time of delivery and report them 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 outside packing material to avoid damage to the finish or exterior of the machine. Remove adhesive residue with denatured alcohol or common household vinegar. 

Remove the Knock-Away Support by placing a spacer under the vending machine, inserting a screwdriver or prying tool into the groove and splitting it in two. Discard the washers located on each side of the wooden supports. Turn the leveling screws in as far as possible. See Figure 1. 

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 can be found on the Serial Plate on the rear of the cabinet and/or inside the vending machine. Refer to these numbers on all correspondence and inquiries pertaining to this vending machine.

Figure 1. Removing Knock-Away- Supports

INSTALLATION 

Consult local, state, and country codes and regulations before installation of the vending machine. 

1.      Position the vending machine in its place of operation no further than six (6) feet
(2 m) from the power outlet or receptacle. 

2.      Leave at least six (6) inches (15 cm) of space between the back of the machine and any wall or obstruction for proper air circulation.  

3.      Retrieve the keys to the vending machine from the coin return cup.  

4.      Open outer door and remove all internal packing material. 

5.      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 

Grounding (Earthing) & Electrical

Before connecting the vending machine, the integrity of the main electrical supply must be checked for correct polarity, presence of ground (earth) and correct voltage. These checks should be repeated at 6-month intervals with the routine safety electrical testing of the vending machine itself.  

For proper operation of any equipment utilizing electronically controlled components, the equipment should be placed on an isolated or dedicated noise-free circuit. 

Figure 2. 230-Volt Outlets 

For 115-Volt vending machines the circuit should be a minimum 15 Amp, 60 cycle, properly polarized and grounded (earthed). 

For 230-Volt vending machines the circuit should be a minimum 7.5 Amp, 50 cycle, properly polarized and grounded (earthed). 

To verify that the receptacle is properly grounded (earthed) and polarized, insert one probe of a Multi-Meter (set to check AC line voltage) or a test light in the ground (earth) terminal (hole) and the other probe into the hot terminal of the outlet. If unfamiliar with this procedure, contact a licensed electrician.  

If the receptacle is not properly grounded (earthed) or polarized, you should contact a licensed electrician to correctly polarize and/or ground (earth) the receptacle to ensure safe operation. 

A noise suppressor has been installed in this machine to compensate for any signal noise that could interfere with the normal operation of the controller. 

Shown in Figure 2 and Figure 3 are two properly grounded (earthed) and polarized wall outlets. Figure 2 shows two 230-Volt wall outlets. 

A10116 

Figure 3. 115-Volt Outlet 

Power Switches

The vending machine has a door switch operated by the outer door. It is located in the lower right corner of the cabinet. When the door is closed, the switch is pushed in to the ON position, putting the vending machine in the Sales Mode. When the door is opened, the switch is forced to the OFF position allowing the vending machine to be put in Service Mode. 

To operate the machine with the door open, the door switch must be manually pulled out, placing it in an alternate ON position.  

A power switch is located on the power panel, along with a 3-amp breaker (lower left area with door open). With the door open, this switch will shut-off the light and controller, leaving evaporator fans running. See Figure 4. (The 3-amp breaker is protection for the controller.) 

A10674 

Figure 4.  Power Panel 

Hinge and Door Removal

Removal of the upper hinge or the door from the lower hinge from the lower hinge pin requires removal of the hinge pin retaining screws. See Figure 5 and Figure 6. 

1.      Open the door to approximately straight out position. 

2.      Remove upper and lower hinge pin retaining screws. 

3.      Use wooden blocks to support the door. A second person is required to steady the door. Upper hinge may now be removed from the vending machine. 

4.      Lift door from lower hinge. Service as required. 

5.      Replace door on lower hinge. Support door on blocks. A second person is required to steady the door while top hinge is installed. 

6.      Replace the hinge pin retaining screw. 

Figure 5. Upper Hinge Pin 

Figure 6. Lower Hinge Pin 

LOADING PRODUCTS 

Product Columns

Products being loaded must match the products displayed in the Live Display. 

The Funnel Slides (white composite sheets) attached on the sidewalls of each product column must be kept clean. This prevents the possibility of a product bridge (product jam) from occurring. See Figure 10. 

The product cradle "bed" of the Product Delivery Mechanism must be positioned facedown in each column to prevent the possibility of a motor jam. The Product Delivery Mechanisms (Vend Mech.) are located at the bottom of each product column. If it is not facedown, cycle the motor to re-position. See Figure 7. 

Most products (10 to 20 ounce cans and bottles) may be loaded without column adjustment. However, the front gate assembly, latch striker, and back spacers may be adjusted if necessary.  See Figure 8.  

To adjust column depth (front to back): lift the gate assembly, latch striker, or back spacer and reposition in the adjustment slots. Product should have ¼ to ½-inch free space at front or back. See Figure 8, Figure 9 and Figure 10. The front gate assembly with its latch striker may have to be staggered relative to an adjacent front column loaded with similar sized products. 

Figure 7. Product Delivery Mechanism (bottom view) 

Figure 8. Column Depth 

Figure 9. Product Column 

Figure 10. Front Gate Assembly 

Drop Sensor Adjustment

The delivery chute uses a drop (vibration) sensor to detect whether product is vended after a selection is made. The drop sensor sends a signal to the controller when a product hits the delivery chute. The sensor is attached to the underside of the delivery chute. 

TO ADJUST DROP SENSOR: 

1.      Loosen the control board cover mounting screws and remove cover. 

a)     Find the five (5) board mounts. See Figure 10a. 

Release the control board from the board mounts. Beginning with the top right corner of the control board, pinch the board mounts using a pair of needle-nose pliers and pull gently on the circuit board. Follow the same procedure to release the remaining four (4) board mounts. 

Figure 10a. Control Board Mounts 

2.      Find the drop sensor adjustment screw and the drop sensor indicator light on the bottom right corner of the control board. See Figure 10b. Set the drop sensor to factory setting as follows: 

a)     Use a small screwdriver to slowly adjust the adjustment screw clockwise (increase sensitivity) and stop when the indicator light comes on. 

b)     Slowly turn the adjustment screw counterclockwise (decrease sensitivity) and stop when the indicator light goes out. Now turn the adjustment screw counterclockwise 3/4 turn. Test the sensor for proper operation by tapping the hopper. The indicator light should blink when the hopper is tapped. 

c)     Re-install the control board back to its mounts. Close the front door and perform several test vends. 

d)     If vending special products, the drop sensor may need the following additional adjustments: 

·         If machine is sending more than one product per vend request (double vend), then open the door and turn the adjustment screw clockwise 1/4 turn (to increase sensitivity). 

·         If machine fails to vend product upon vend request, turn adjustment screw counterclockwise 1/4 turn (to decrease sensitivity). 

3.      Re-install control board cover. Close inner and outer doors. 

Figure 10b. Drop Sensor
Adjustment Screw  

CONTROLLER 

The vending machine must be in Sales Mode to vend products. 

The vending machine must be placed in the Service Mode to change program settings and retrieve diagnostic information. 

Service Mode Button

Enter the Service Mode by simply opening the main door and pushing the blue Service Mode Button located on the middle right side of the control board. See Figure 11. Upon entering the Service Mode diagnostic error codes will be displayed if the controller has flagged any errors. If credit exists when entering the Service Mode, it will be restored when the machine is returned to Sales Mode.  

Electrostatic discharge can cause major problems in the control board. If possible use an anti-static conductive wrist strap when working with the control board. Always handle electronic boards by the edges, not touching any of the components. 

Figure 11. Controller 

Keypad Function During Service Mode 

After placing the vending machine into Service Mode (pressing the blue Service Mode Button located on the center right side of the control board), the keypad becomes the input terminal by which the vending machine is programmed. The following (Table 1) is a list of the four (4) tasks designated. 

Table 1. Service Mode Keypad Functions