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Manual

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 

Caution 

This vending machine utilizes DC motors. Do not attempt to turn by hand. Motor damage could occur.  

·         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.

 

Removing Knock Away Supports diagram for 12 selection drink vending machines. 

Figure 1. Removing Knock-Away- Supports

 

INSTALLATION 

 

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

Caution 

To insure reliability and maintain manufacturers equipment warranty, machine must NOT be placed in an environment where the temperature is greater than 90°F/32°C and the relative humidity is 65% or greater.  

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

Warning 

DO NOT USE EXTENSION CORDS. Extension cords can cause problems.  

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. 

  

230- Volt Outlets diagram for 12 selection drink vending machines. 

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. 

  

 

A10116115 Volt Outlet for 12 selection drink vending machines. 

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.) 

  

Power Panel for 12 selection drink vending machines 

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. 

Warning 

Support door before removing upper hinge. Door is very heavy and could fall causing serious injury. 

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. 

  

 Upper Hinge Pin instructions for 12 selection drink vending machines 

Figure 5. Upper Hinge Pin 

Lower Hinge Pin insturctions for 12 selection drink vending machines 

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. 

  

Product Delivery Mechanism (bottom view) for 12 selection drink vending machines 

Figure 7. Product Delivery Mechanism (bottom view) 

  

 Column Depth diagram for 12 selection drink vending machines 

Figure 8. Column Depth 

  

  

Note on Product Columns 

Facing the open machine, COLUMN 1 is the far right front column COLUMN 2 is the far right back column. Column 13 is the far left front column. COLUMN 14 is the far left back column.  

  

 Product Column instructions for 12 selection drink vending machines 

Figure 9. Product Column 

  

 Front Gate Assembly identification for 12 selection drink vending machines 

Figure 10. Front Gate Assembly 

  

  

Note 

Standard 12 oz cans may be double loaded in the front and back, increasing the column capacity. 

  

Caution 

When loading bottled product, make sure that the bottoms of the bottles face the center of the machine. Load bottles in the back of the machine with bottom facing the attendant. Load bottles in the front of the machine with top facing the attendant. 

Do not load dented or damaged cans or bottles in the columns. Possible jams could occur. 

Do not store bottles in "spare" space of the cabinet. The refrigeration unit could be damaged. 

  

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. 

 Control Board Mounts instructions for 12 selection drink vending machines  

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. 

  

Drop Sensor Adjustment Screw diagram for 12 selection drink vending machines 

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.  

Caution 

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. 

  

Vending Machine Controller diagram 

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 

Button 

Meaning 

Function 

A button   

UP  

Increase, Next, etc.  

B button 

DOWN 

Decrease, Previous, etc 

C button 

ENTER
(Press and hold
for less than 2 seconds) 
 

Save, Accept, OK, etc. 

C - button 

HOME
(Press and hold
for more than 2 seconds) 
 

Exit, Escape, Return, etc 

  

  

Keypad Notes 

Letters correspond to Numbers. (A=1, B=2, C=3, D=4, E=5, F=6, G=7, H=8, J=9, L=0)  

The letters I, K, M, O, S, V, W, X, Y, and Z will not appear on the keypad. 

Reminders of button codes will be included on each page of this manual.  

  

Standard Controller

Refer to Figure 12 for an overview of the menus available with the Standard Controller. 

The Service Mode menus are accessible only when main door is open. Press the Service Mode Button and the display will show "Eror" (Errors Mode), which marks the beginning of the Service Menu. 

The same control menus are also available in the Extended Controller. Refer to Extended Controller Option on page 2. 

  

Vending Machine Standard Controller Menu Map 

Figure 12. Standard Controller Menu Map 

  

  

Errors Mode

Error Mode program code 

To move on to the next diagnostic step press the <up> (A) button. 

  

Table 2. Possible Error Codes  

Error Detail chart 

  

Column Test Vend Mode

Column Test Vend Mode instructions  

  

Cash Counter Mode

CASH - Includes a total count of the cash taken into the vending machine, which cannot be reset. Counts include the type (CL=cash level). Each count may be displayed in 1 or 2 sets of 4 digits. An example of each: 

  

Cash counter mode chart 

  

Press <enter> (C) while "CASH" is displayed to enter mode. 

"CASH" will flash in the display along with the total amount of cash taken into the machine. Press <up> (A) or <down> (B) to display each individual selection cash count. Press <home> (C - for more than 2 seconds) to return to "CASH" display. From there <down> (B) goes to "tESt"; <up> (A) moves on to "SALE". 

  

  

For Extended Controller Only 

Individual selection counts may be reset on the Extended Controller only. See Configuration Mode on page 2. If individual counters have been configured to reset, they will reset upon reading at least one of them and closing the machine door.  

  

Sale Counter Mode

SALE - Includes a total count of products vended from the vending machine, which cannot be reset. Counts include the type (SL=sale level). Each count may be displayed in 1 or 2 sets of 4 digits. An example of each: 


  

Sale counter mode chart 

 

Press <enter> (C) while "SALE" is displayed to enter mode. 

Sale counter mode  

For Extended Controller Only 

Individual selection counts may be reset on the Extended Controller only. See Configuration Mode on page 2. If individual counters have been configured to reset, they will reset upon reading at least one of them and closing the machine door. 

  

Selection Price Mode

Selection price mode 

Note 

Pressing <enter> (C) with "ALL" displayed will reset all price selections. 

The default price setting for all selections displayed is the P1 price setting. Press <up> (A) to increase price [in base units]. Press <down> (B) to decrease price [in base units]. Press <enter> (C) will save new setting and return to "All" display. 

Note 

The base unit value is dependent on the coin changer, dollar bill changer, or card reader monetary base unit. 

For example: base unit is .05 for US coin mechanisms. 

Instructons to view/set price settings 

Note 

With the factory default Space to Sales Option 1, P1 will set the price for columns 1 and 2, P2 will set the price for columns 3 and 4, P3 will set the price for column 5, etc…P12 will set the price for column 14. Space to Sales Option can only be changed on the Extended Controller Option. 

Programming instructions for 12 selection drink vending machine  

  

Set Vending Depth Mode

Set Vending Depth Mode instructions for 12 selection drink vending machines 

Save Some Time 

Under the "ALL" display, set the single depth setting for the majority of selections. Then change the few that are different by using the Individual Setting process - Press <up> (A) or <down> (B) while "ALL" is displayed. The individual settings will display. Press <enter> (C) while a selection depth setting is displayed and it will begin to flash. Then press <up> (A) or <down> (B) to change the depth setting (1 or 2). Press <home> (C - for more than 2 seconds) to save and lock setting and return to the current selection display. At this point, each selection may be viewed. 

  

  

Coin Tube Fill Mode

Coin Tube Fill Mode instructions for 12 selection drink vending machine.  

  

Coin Payout Mode

Coin Payout Mode instructions for 12 selection drink vending machine 

  

Refrigeration Parameters Mode

Refrigeration Parameters Mode instructions for 12 selection drink vending machines 

  

Cuti function

Cuti Function instructions for 12 selection drink vending machine  

  

Cuto function

Cutout Function instructions for 12 selection vending machine. 

  

Extended Controller Option

The Extended Controller have the same basic menus that the Standard Controller plus extended features. The additional menus and control modes shown in this section of the manual are available only if you have ordered the 12 Selection Drink Vending Machine with an Extended Controller.  

Refer to Figure 13 for a map of the Extended Controller main menus. Highlighted menus are part of the Standard Controller and are described in the Standard Controller section on page 2 of this manual. 

To vend product, or to access error codes and sales counts the vending machine must be in Sales Mode. Only the External Menu is accessible.  

To change program settings and retrieve diagnostic information, the vending machine must be placed in the Service Mode. The Service Menu and Password Protected Menus would then be accessible. 

  

  

 Extended Controller Menu Map diagram for 12 selection vending machine 

Figure 13. Extended Controller Menu Map 

  

  

Password Mode

Password Mode instructions for 12 selection vending machine 

  

Return to Sales/Greeting Mode

Return to Sales/Greeting Mode insturctions for 12 selection vending machine  

  

Discounted Sale Counter mode

Discounted Sale Counter Mode instructions for 12 selecton drink vending machine. 

Note 

If individual counters have been configured to reset (see Configuration Mode) they will reset upon reading at least one of them and closing the machine door. 

  

  

Differential Cash Discounted Counter Mode

Differential Cash Discounted Counter Mode instructions for 12 selection drink vending machine  

  

Set Discount Pricing Mode

Set Discount Pricing Mode instructions for 12 selectin drink vending machine.  

  

Space to Sales Mode

Space to Sales Mode instructions for 12 selection drink vending machine.  

  

Table 3. Space to Sales Option Settings 

Selection 

OPt
0
 

OPt
1
 

OPt
2
 

OPt
3
 

OPt
4
 

OPt
5
 

OPt
6
 

OPt
7
 

OPt
8
 

1 [A] 

NONE 

1,2 

1,2,3 

1,2,3 

1,2,7 

1 

1,2,7,8 

1,7 

1 

2 [B] 

NONE 

3,4 

4,5 

4,5 

3 

2,3,8 

3,4 

2,8 

2 

3 [C] 

NONE 

5 

6 

6 

4 

4 

5,11 

3,9 

3 

4 [D] 

NONE 

6 

7,8 

7 

5 

5 

6,12 

4,10 

4 

5 [E] 

NONE 

7 

9 

8,9 

6 

6 

9 

5,11 

5 

6 [F] 

NONE 

8 

10 

10 

8 

7 

10 

6,12 

6 

7 [G] 

NONE 

9 

11 

11 

9 

9 

13 

13 

7 

8 [H] 

NONE 

10 

12 

12 

10 

10 

14 

14 

8 

9 [J] 

NONE 

11 

13 

13 

11 

11 

NONE 

NONE 

9 

10 [L] 

NONE 

12 

14 

14 

12 

12 

NONE 

NONE 

10 

11 [N] 

NONE 

13 

NONE 

NONE 

13 

13 

NONE 

NONE 

11,12 

12 [P] 

NONE 

14 

NONE 

NONE 

14 

14 

NONE 

NONE 

13,14 

13 [R] 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

14 [T] 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

NONE 

  

  

Note 

Remember that selection numbers correspond to button letters—Selection 1=Button A; Selection 2=Button B, etc. 

  

  

Configuration Mode

Configuration Mode instructions for 12 selection drink vending machine. — Setting machine options in pricing, payback, acceptance, and optional features. In this mode, the configuration, followed by its current setting will be displayed. Note the following list of configuration displays and their meanings. 

  

  

Table 4. Configuration Mode List  

Configuration 

Setting 

Meaning 

C1 

0 

Single Pricing 

1 

Multiple Pricing  

C4 

0 

Display errors or "nonE" 

1 

Display Sales, Cash Values, and existing error or "nonE"  

C5 

0 

No reset of individual counters 

1 

Allow reset of individual counts upon reading and door switch actuation  

C6 

0 

Credit will be returned if proper change cannot be made 

1 

Allow vend regardless of changer tube levels (change may not be paid)  

C7 

0 

Allow bill acceptance regardless of payout availability 

1 

Accept bill only if coin payout can cover difference between bill value and maximum vend price  

C8 

0 

Escrow to vend (will act as a bill changer) 

1 

Forced attempt (will not act as a bill changer)  

C9 

0 

Change automatically returned to customer after a valid vend 

1 

Hold customer's change in escrow to allow a multiple purchase  

C10 

0 

Bill escrow disabled 

1 

Bill escrow enabled  

C11 

0 

All errors displayed 

1 

Certain errors displayed  

C12 

0 

12 Column mode 

1 

10 Column mode  

  

  

Configuration Mode directions for 12 selection drink vending machine.  

  

Time and Timer Settings Mode

Time and Timer Settings Mode instructions for 12 selection drink vending machine.  

  

Time and Date Setting Mode

  

Time and Date Setting Mode instructions for 12 selections drink vending machine.  

Year, Date, Hour, SetDay, Stop, Day Function key instructions for 12 selection drink vending machine.  

  

Table 6. Day Function Setting Modes 

Table 6. Day Function Setting Modes instruction chart for 12 selection drink vending machine.  

  

Instructions for change in the on and off times setting. 

  

Dst Function

Display time setting mode instructions for 12 selection drink vending machine 

Dlt Function

Daylight savings time setting instructions for 12 selection drink vending machine  

  

Refrigeration Parameters Mode

Refrigeration Parameters Mode instructions for 12 selection drink vending machine. 

  

Cut in and cut out temperature, degree setting, display temperature, refrigeration function, and relay test function instructions for 12 selection drink vending machine  

  

Table 7. Relay Test Functions 

Relay Test Functions for 12 selections drink vending machine  

  

Relay test function mode instructions for 12 drink vending machine.  

  

External Menu Password Setting Mode

Externa manu password setting mode instructions for 12 selection drink vending machine  

  

International Language Setting Mode

International Language Setting Mode instructions for 12 selection drink vending machine 

Exact Change Value Mode

Exact change value mode instructions for 12 selection drink vending machine 

External Menu

This menu is primarily used to access error codes and sales counts. The main door does not have to be open to enter this menu. Entering the correct 4-alpha button password while the machine is in stand-by accesses the External Menu. Stand-By indicates that the greeting is displayed, credit is not established, and free vend is not set. 

This menu gives access to total and individual (per selection) vend counts, vending machine error diagnostics, and a clearing feature for individual vend counts. This menu does not provide programming ability. Vending machine will return to sales mode after 5 minutes. 

Sale Counter Mode

Sale — Extracting information concerning the amount of product vended. The total count cannot be reset, but individual selection counts may be reset if configured accordingly. See Configurations on page 2. 

The type precedes counts. Each count may be displayed in 1 or 2 sets of 4 digits. Refer to Table 8. Sale Counter Mode Examples.  

  

  

Sale counter mode examples for  12 selections drink vending machine  

  

Program Troubleshooting

Improper programming can cause unexpected results. Refer to the following troubleshooting guide: 

Table 9. Program Troubleshooting Guide 

Program Troubleshooting Guide for 12 selection drink vending machine. 

Refer also to Table 2. Possible Error Codes on page 2. 

  

  

VEND CYCLE 

  

Stand-By Condition

The greeting, vend price (if all are set to the same value), and a choice of other optional features will be displayed. If a customer presses a select button before establishing a credit, the vend price for that selection will be displayed, signaling the customer that more money is needed for that selection. 

  

  

Establishing Credit

Feeding coins into the coin changer results in the display of the corresponding credit count. The coin changer will accept coins until the highest vend price has been reached. At this point a credit has been set up through the control board that will enable a vend for any selection less than or equal to the established credit. 

  

  

Valid Selection

Making a selection causes the selection switch to close. A logic level signal is constantly sent out from the control board that then travels to each switch's common position. When the switch is closed, the signal travels out the normally closed position to the harness connection to the control board. 

  

  

Vend Sequence

The control board then distributes 24 volts DC through the door and cabinet wiring harnesses and to the coil of the selection vend motor. At the same time, the display will scroll. This indicates to the customer that a vend is in progress. As the vend motor receives power, it will turn the rotor, attempting to vend a can or bottle. 

  

  

Product Delivery

As the can or bottle drops onto the product delivery chute, the impact vibration allows the delivery sensor to send a low voltage signal to the control board indicating that a product has been vended. After receiving the sensor signal, the control board will recognize how the machine is programmed and respond accordingly. 

If the first can or bottle has just vended the control board will stop all power to the vend motor at the same time that the impact is registered, thus avoiding a multiple vend. As the next can or bottle vends, the control board will cycle the vend motor to pick up another can or bottle, thus allowing a quick vend turnaround of less than 3 seconds. 

  

  

Note 

The control board will use a Learning Mode to determine which the front is or rear product. This process is reset either on powering down or up or a door opening or closing. The Learning Mode acts in conjunction with the depth setting to enable automatic reload after the rear product has vended. 

The controller will note the first "long-timed out" vend cycle during the learning process. From this the controller will determine that the next vend will be front product. 

  

  

Sold-Out

The display will cycle to show the vend progress of each selection. If a product drop is not detected in 10 to 12 seconds, "Sold Out" will be displayed. "Sold Out" may be due to: 

·         Selected column is jammed. 

·         Column is actually sold out. 

·         Sensor does not detect product drop and needs adjustment. 

·         Selection does not have a column assigned.  

At the "Sold Out" display, the customer may make a different selection or receive a refund by pressing the coin return lever. If the vending machine is set for forced purchase, the customer must make an initial selection. If the initial selection is sold out, a full refund or an alternate selection will be allowed. If the vending machine is totally sold out of all products, the "Sold Out" display will be continuous and no money will be accepted into the vending machine. 

  

  

Resetting Sold-Out Selections

Only opening the vending machine door will clear a sold out condition (which activates the vending machine door switch). The controller will not attempt a vend until this is done. Pressing a select button will only initiate the "Sold Out" display. 

  

  

REFRIGERATION 

Note 

To prevent damage to the refrigeration unit when it is turned off or the power interrupted, the refrigeration unit will not restart for at least three minutes regardless of the temperature. 

  

When the temperature is above the programmed cut-in temperature, the refrigeration unit is turned on. Upon reaching the cut-out temperature the refrigeration unit is turned off. 

If the refrigeration unit runs continuously for more than four hours without reaching the cut-out temperature, the unit is turned off for the programmed twenty (20) minute defrost time. It will then be turned on again automatically.  

  

Refrigeration Troubleshooting

If the refrigeration unit is turned off, or the power is interrupted, or the door is opened, then the refrigeration unit will not start for at least three minutes regardless of the temperature. This is done to prevent damage to the refrigeration unit. 

Caution 

Breaking the refrigerant joints or seals on the system voids the unit warranty. Failure to keep the condenser coil clean and free of dirt and dust and other similar debris voids the unit warranty. 

Know and understand how the unit operates. Units may vary, but the operation is basically the same. Never guess at the problem; find the symptom before attempting any repair. 

Note 

Most refrigeration problems are electrical. 

The sealed hermetic system should not be worked on outside the Factory Service Center. The three things that can go wrong with a sealed system and should be repaired only at the Factory Service Center are: 

·   Low Charge - usually caused by leaks; look for oil around seals and welds. Unit will not cool properly. The capillary tube is frosted before it enters the evaporator inlet tube.

·   Restriction in Systems (unit frosts, then melts) - not cooling properly.

·   Bad valves - unit does not cool properly; noisy compressor.

  

  

Compressor will not start

·         Compressor has no power 

·         Vending Machine not plugged in

·         Tripped breaker or blown fuse

·         Faulty wall outlet

·         Short or open in power cord

·         Temperature sensor circuit is open (check with a Multi-Meter)

·         Improper wiring

·         Low voltage: 5% below (check the power source with a Multi-Meter)

·         Overload defective: Trips too fast (check overload with a Multi-Meter)

·         Start relay defective (check start relay with a Multi-Meter)

·         Compressor has open windings (check compressor windings with a Multi-Meter)

·         Defective refrigeration relay

·         Unplug power to the machine; remove the relay plate. Use an insulated jumper wire to short the wires on relay terminals 2 and 4 or 6 and 8; then restore power to the machine. The compressor should start immediately, indicating a problem in the control circuit.

·         Check relay terminals 1 to 0 with a Multi-Meter. 24VDC should be present.

·         No DC voltage (check control board output terminal for a loose connection)

  

  

Compressor trips on Overload

·         Improper voltage: 5-10% above, 5% below (check power source with a Multi-Meter)

·         Overload defective: Trips too fast (check overload with Multi-Meter)

·         Relay defective: Won't open after starting (check relay with Multi-Meter)

·         Compressor has shorted windings (check compressor windings with Multi-Meter)

·         Short in other component (isolate and eliminate each electrical component until short is found)

·         Compressor is too hot

¨       Dirty condenser

¨       Faulty condenser motor or blade

¨       Restricted airflow

CAUTION 

Condenser must be kept clean of dirt and debris to allow for proper air circulation. 

Noisy or vibrating unit

·         Components rubbing or touching each other

¨       Check fan blades and motor

¨       Loose shrouds and harness

¨       Copper tubing

¨       Loose or unsecured parts

¨       Dirty condenser fan blades

·         Worn or aged compressor grommets

·         Compressor

¨       Bad valves

¨       Slugging

¨       Bad windings (see Schematic)

¨       Low voltage

  

Unit short cycles

·         Temperature sensor defective or not mounted in the Discharge air duct

·         Defective control board

·         Temperature setting set too warm (see Refrigeration Parameters Mode on page 2 of this manual)

Unit operates long or continuously

·         Temperature Sensor defective or not mounted in the Discharge air duct

·         Refrigeration relay shorted

·         Air flow restricted

¨       Faulty evaporator motor or blades causing coils to ice

¨       Loose connections on evaporator motor

¨       Air flow blocked by product in front of evaporator

¨       Exhaust area blocked (machine too close to wall)

·         Gasket leak around door

·         Excessive load: After loading, unit runs longer to pull out excessive heat from product

·         Shortage of refrigerant or restriction

·         Bad controller

·         Ambient air temperature and relative humidity exceed manufacturers operational standards

Refrigerated space too cold

·         Temperature sensor defective (check with Multi-Meter)

·         Refrigeration control setting too cold (see Refrigeration Parameters Mode on page 2 of this manual)

·         Refrigeration relay bad (check with Multi-Meter)

·         Faulty control board

Refrigerated space too warm

·         Temperature sensor defective (check with Multi-Meter)

·         Refrigeration control setting too warm (see Refrigeration Parameters Mode on page 2 of this manual)

·         Refrigeration relay bad

·         Faulty control board

·         Restricted evaporator space


¨       Evaporator motor or blades faulty, causing the coils to ice over the evaporator

¨       Condenser airflow restricted

¨       Plugged or dirty condenser

¨       Condenser motor or blades bad

¨       Blade stuck

¨       Condensing space restricted

¨       Unit placed too close to a wall

·         Compressor - bad valves

¨       Capillary tube will start frosting 8 to 10 inches (20-25 cm) before evaporator connection tube

¨       Check for oil around brazed connections

Troubleshooting circuits with Multi-Meter

·         To check the power source, use the voltage section of the Multi-Meter (should measure within 5-10% above, 5% below)

·         Check overload using the resistance section of the Multi-Meter, check terminals 1 and 3 for continuity. If no continuity is measured (infinity), overload may be tripped. Wait 10 minutes and try again. If still no continuity, overload is defective.

Caution 

Power must be off and fan circuit open. 

·         Check relay (See Figure 14.) Unscrew lead terminals and remove relay from compressor. Keep relay upright.

·         Check terminals 1 and S, or L and S with the Multi-Meter. Replace relay if continuity exists.

·         Check Temperature sensor with the Multi-Meter.

·         Check compressor windings as shown in Figure 14.

·         Check winding resistance with the Multi-Meter. If readings are not within 2 Ohms, the compressor is faulty. Use RX1 scale.

WARNING 

Wiring diagrams must be followed as shown. Incorrect wiring can cause serious electrical hazard and potential damage or rupture component electrical parts. 

  

Table 10. Winding Resistance 

APPROX. RESISTANCE ACROSS TERMINALS 

COMMON to START: 

12 Ohms 

COMMON to RUN: 

2 Ohms 

RUN to START: 

14 Ohms 

COMMON to SHELL: 

No Continuity 

  

  

Vending Machine Compressor Schematic

Figure 14. Compressor Schematic 

  

  

PREVENTATIVE MAINTENANCE 

  

Once a Month

Caution 

Always disconnect power source BEFORE cleaning or servicing.  

Clean Cabinet Interior

Wash with a mild detergent and water, rinse, and dry thoroughly. Including baking soda or ammonia in the cleaning solution may eliminate odors. Plastic parts may be cleaned with a quality plastic cleaner. Remove and clean Condensate Drain Hose to eliminate any deposits that may restrict condensate water flow. 

The vend mechanisms must be kept clean. Any build-up can cause the mechanisms to malfunction. 

Do not get the cleaning solution on electrical components. 

To insure proper vending keep delivery slide area free of dirt and sticky substances. 

Clean Cabinet Exterior

Wash with a mild detergent and water, rinse, and dry thoroughly. Polish occasionally with a quality car wax. Plastic exterior parts may be cleaned with a quality plastic cleaner. 

  

Every 60-days

Clean Refrigeration Intake Screen

Remove screen and clean dust and debris from screen using a soft bristle brush or a vacuum cleaner. 

  

  

Every 6-months

Clean the Condenser Coil and Rear Exhaust Screen

Remove the Cover Assembly and clean the condenser coil of refrigeration unit using a soft bristle brush or vacuum cleaner. 

Pull the refrigeration unit and clean the rear exhaust screen of dirt and debris. 

Do not block the evaporator or any area of the airflow with product or supplies. 

  

  

PARTS ORDERING PROCEDURE 

  

When ordering parts, include the following: 

1.      The model number and serial number of the machine. 

2.      Shipping address. 

3.      Address where the invoice should be sent. 

4.      The number of parts required. 

5.      Any special shipping instructions. 

6.      Carrier desired: air or air special, truck, parcel post, or rail.  

7.      Signature and date. 

8.      If a purchase order number is used, be sure that it is visible and legible. 

9.      Correct part number and description from the pertinent part and/or parts manual. 

Note 

When "Right" and "Left" are used with a part name, it is taken to mean that the person is facing the machine with the door closed. 

10. Mail your order to:         VendNetÔ  

165 North 10th Street  

Waukee, Iowa 50263 - USA  

Phone: 515-274-3641 

Parts Fax: 515-987-4447 

Sales Fax: 515-274-0390 

E-Mail: Vendnt@vendnetusa.com  

All orders are carefully packed and inspected before shipment. Damage incurred during shipment should be reported at once and a claim filed with the terminating carrier. 

If you do not have the right parts manual, contact the above address. VendNetÔ will provide a copy for you, if available.  

Do not wait to order until you receive the parts manual; instead use the most accurate description you can. Include the model number and serial number of the machine, the name of the assembly in which the part is used, and if practical, a sample part. Furnish any information to enable our Parts Department to pinpoint the exact part needed. 

  

BEFORE CALLING FOR SERVICE 

  

Please check the following: 

·         Does your vending machine have at least 6-inches of clear air space behind it? 

·         If the power is turned on at the fuse box, is the vending machine the only thing that doesn't work? 

·         Is the vending machine plugged directly into the outlet? 

Warning 

Extension cords can cause problems.  

DO NOT USE EXTENSION CORDS. 

·         Is the evaporator coil free of dust and dirt? Is the condenser coil free of dust and dirt? 

·         Is the compressor free of dust?  

·         Is the circuit breaker at the fuse box reset? 

·         Are evaporator fans running? To check if fans are running take a small piece of paper in front of the evaporator coil and see if the evaporator fans will blow the paper away. 

·         Is the condenser fan running? Place a piece of paper in front of the condenser coils and see if it draws the paper to it.  

·         Is the shelf in front of the evaporator coil clear? (No tools, product, or other air-restricting items). 

·         Is the cold control set as specified? 

Note 

Setting the temperature colder does not accelerate cooling of product. 

  

ANTI-CHEAT INSTALLATION 

  

Warning 

To avoid electrical shock when performing service, disconnect the electrical power. Do not remove electrical components and parts without first unplugging the power cord from the power source. 

1.      Unlock and open the door. Separate the Inner Door from the Front Door. 

2.      Find the Delivery Box on the bottom right corner of the Front Door as viewed from behind the Front Door. Remove the Delivery Box from the Front Door by removing the bolt nuts. See Figure 15. 

  

Remove Delivery Box Mounting Nuts instructions for 12 selection drink vending machine 

Figure 15. Remove Delivery Box mounting nuts. 

  

  

3.      Remove the four (4) nuts holding the Delivery Bezel and save them for step 4. Insert the Anti-Cheat through the Delivery Bezel rectangular hole. See Figure 16. 

  

  

 Insert Anti-Cheat through Front Door Opening instructions for 12 selection drink vending machine 

Figure 16. Insert Anti-Cheat through Front Door opening. 

  

 Install and tighten nuts guide for 12 selection drink vending machine 

Figure 17. Install and tighten nuts. 

  

4.      Mount the Anti-Cheat slotted mounting holes over the mounting bolts of the door as shown in Figure 17. Re-install nuts removed from step 3 and tighten them. 

5.      Re-install the Delivery Box. 

6.      Close the Inner Door to the Front Door. Plug the vending machine to the wall outlet and turn on power. 

7.      Close the Front Door and perform test vends. 

  

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.  

 

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