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22

TROUBLESHOOTING LOGIC / CHARTS 

Always troubleshoot using logical, progressive steps so that the maintenance and repair 
procedure runs smoothly and efficiently. Most failures may have minor causes such as loose 
connectors or dirty contacts. Always check the following before replacing any parts: 

• 

Check that all the plugs and connections are seated firmly in their receptacles. 

• 

Check that there is continuity in the wires. 

• 

Check that the connector pins are not bent or broken.

 

 

Problem 

Possible Cause 

Corrective Action 

Note:

 The machine has dynamic breaking features that make it difficult to move the robot 

manually when power is on.  

 

Faulty L/R home switch 

Turn the power off. Disconnect 
the left / right home switch. Using 
a jumper wire or small paperclip 
connect the two wires that the 
switch plugs into. Move the robot 
6” to the right. Turn power on. If 
the robot does not move replace 
the left / right home switch. 
PN-49500566. 

Check the connection from the 
controller board to the L/R home 
switch. 

Turn power off. Check the 
computer board connection 
labeled J5 and intermediate board 
connections J5 and J24. If the 
connections look good check 
continuity from computer board J5 
pins 7 & 8 to int. board J5 pins 7 
& 8, and from int. board J24 pins 
1 & 2 to the two wires at the left / 
right home switch. 

Left/Right Stuck Motor 
 

Turn machine power off. 
Manually move the robot 
right about 6”. Turn 
power on. If the robot 
moves left: 

Faulty computer board / 
intermediate board 
 

When replacing the computer 
board note the software on the 
defective board as well as the 
position of the jumper JP1. Make 
sure the software and jumper 
postion are the same. Incorrect 
software or jumper may cause the 
machine to function improperly.

 

Turn power off. Locate the 
computer board connection 
labeled J5. Using a jumper wire or 
small paperclip, connect pins 7 & 
8 together through the back of the 
connector. Move the robot right 6” 
and turn the power on. If the robot 
moves left, replace the computer 
board. PN-19300529. If the robot 
does not move left replace the 
intermediate board. 
PN-49405540. 

Left/Right Stuck Motor 

 

Turn machine power off. 
Manually move the robot 
right about 6”. Turn 
power on. If the robot 
does not move left: 
 
 
 

 

Broken / binding gear  

Turn power off. Examine the left / 
right motor gear. Look for any 
broken teeth. Manually move the 
robot left and right. Check for 
binding. If a replacement gear is 
necessary, PN-49500406. 
 
 
 
 
 

Summary of Contents for F820

Page 1: ...F820 Service and Parts Manual Ver FC031504...

Page 2: ...s Option 11 Set Time 22 23 Tokens Coupons Field Test F Free Vend Test Vend III Troubleshooting A Glossary Of Useful Terms B Error Reporting Features 1 Non Fatal 2 Fatal C Order Of Operation 1 Initiati...

Page 3: ...range of operation temperature is 25 F 31 C to 15 F 9 C at 70 F 21 C ambient The standard chest freezer inside the F820 does not self defrost automatically The freezer chest requires maintenance when...

Page 4: ...FFC cables with the corresponding connector number printed on the intermediate board J 24 J 25 Mark the 2 pin connector which plugs into J 28 VAC sensor below the ground wire Remove the 2 pin connecto...

Page 5: ...the serial number error code and a description of the problem available before calling The toll free number to call is 1 888 441 3278 and press 2 for the service department If your meter does not have...

Page 6: ...of the cabinet 3 Robot carriage moves towards the FRONT of the cabinet considered the HOME position If the robot does not move or follow the Homing Sequence 1 There may be setup errors or shipping da...

Page 7: ...ity of all ice cream novelties Spacers and inserts are provided for products such as ice cream cones sandwiches and Snickers However if there are products that require special bins contact the FASTCOR...

Page 8: ...Key Press a key and the screen will change to Testing External RAM for about one second 5 The screen will display Checking Real Time Clock Disconnect the power and return the dipswitch settings to no...

Page 9: ...en vend time 17 MACHINE SERIAL NUMBER Allows programmer to program serial number of the vendor for machine identification during DEXing 18 GROUP SALES OPTION Allows programmer ability to have up to fo...

Page 10: ...clear all bin errors and Out Of Product bins press Load and then Close on the service keypad The display must be in the main menu for this to work ie 1 CHANGE PRICE 5 The machine is ready to be edite...

Page 11: ...ext Yes a Press the Yes key to alter Product Height A1 Height 1inch 1 4 Next Yes b Press the Next key for heights 1 4 inches Press Yes key to enter new product height A1 Height 3inches Accept No Yes c...

Page 12: ...ter of product selected Press the back button first Holding down to accelerate pulse your finger on button to move in 1 16 increments Move robot right then drop picker head to verify that it is center...

Page 13: ...e Yes key to enter set date menu Enter Date 01 01 03 Abort Enter b Type new date press the Enter key to store Date format MM DD YY Enter Date 01 05 03 Accept No Yes c Press the Yes key to store new da...

Page 14: ...be off and press the Enter key Mon Blk 1 On 09 00 military time Accept No Yes e Press the Yes key to store the time Mon Blk off _ _ _ _ Abort Enter f Type the time you want vending to resume and pres...

Page 15: ...lt is ON Display Programming Instructions 16 LINE MODE Next Menu Yes a Press the Yes key LINE MODE ON Scroll A Abort Enter b Press the key to select the desired option c Press the key to confirm the s...

Page 16: ...r additional blocks of time if desired if not press Abort key to exit screen Press A key to exit next screen and A once more to return to main menu 19 TOKENS COUPONS Enables the option to accept token...

Page 17: ...Point Coordinates where the robot drops product into the product delivery chute located in the front center area of the cabinet VAC Error VAC key Log used by the computer to store fatal machine errors...

Page 18: ...ontroller fails to see encoder pulses on the X axis after 3 unsuccessful tries This error typically occurs during product retrieval or delivery Front Back F B Encoder Error Occurs when the controller...

Page 19: ...oordinate 3 Robot Moves Right The L R Motor moves the robot to the right on the X axis As the robot leaves the L R Home position the controller looks for the L R Home Switch to open to begin counting...

Page 20: ...obot reaches the full up position triggering the Z Home Switch If The controller times out before a closed U D Home Switch signal is detected The vacuum motor is shut down The machine is put out of or...

Page 21: ...tion of the product drop point If Encoder pulses are not seen for a period of time the robot will move straight back returning to the Y Home Position located at the front of the cabinet The robot will...

Page 22: ...J5 and J24 If the connections look good check continuity from computer board J5 pins 7 8 to int board J5 pins 7 8 and from int board J24 pins 1 2 to the two wires at the left right home switch Left R...

Page 23: ...nt Faulty computer board When replacing the computer board note the software on the defective board as well as the position of the jumper JP1 Make sure the software and jumper postion are the same Inc...

Page 24: ...Turn power off Check the computer board connection labeled J18 the intermediate board connections J18 and J29 and the plug at the front back motor If the connections look good check continuity from c...

Page 25: ...he same Incorrect software or jumper may cause the machine to function improperly Turn power off Locate the computer board connection labeled J5 Using a jumper wire or small paperclip connect pins 3 4...

Page 26: ...open switch Turn the power off Disconnect the freezer door open switch Using a jumper wire or small paperclip connect the two wires that the switch plugs into Close the freezer door Turn power on and...

Page 27: ...oken teeth Manually move the lift arm up and down Check for binding If a replacement gear is necessary PN 49500406 Check connection from the Computer board to the Freezer Door Motor Turn power off Che...

Page 28: ...en the screws on the switch slide it back towards the freezer and retighten Check connection from the controller board to the freezer door closed switch Turn power off Check the computer board connect...

Page 29: ...J25 and the plug at the freezer door motor If the connections look good check continuity from computer board J18 pins 1 3 to int board J18 pins 1 3 and from int board J25 pins 1 5 to the freezer door...

Page 30: ...r postion are the same Incorrect software or jumper may cause the machine to function improperly Set your multi meter to DC Volts On the computer board connector J5 across pins 15 16 should be 5 volts...

Page 31: ...down If not replace the U D motor If the motor has a small pigtail harness use PN 49505565 If the connector is right on the motor use PN 49505555 U D Encoder Error During the vend cycle the robot hose...

Page 32: ...rd note the software on the defective board as well as the position of the jumper JP1 Make sure the software and jumper postion are the same Incorrect software or jumper may cause the machine to funct...

Page 33: ...machine Leaking vacuum valve assy Inspect the assembly and fix the cause of the leak Bin Errors Robot dropping product Binding in the vacuum valve assembly Inspect the assembly and fix the cause of t...

Page 34: ...ns replace the picker head assembly PN 39510620 Short in the harness from the picker to the intermediate board Remove machine power Disconnect the hose from the picker Unplug the 2 pin connector Unplu...

Page 35: ...sensor PN 19610510 Health Sensor Active Occurs when the health sensor opens Usually at 10 degrees Faulty intermediate board faulty computer board When replacing the computer board note the software o...

Page 36: ...pin connectors from the interface board 3 Label and remove the following connectors from the computer board a door 2 pin top left twisted wires b triacs left side lower 12 pin w wires at location 1 an...

Page 37: ...andoffs positioning it the same way as the old board 10 Remove the harnesses from the original board one at a time and install them on the new board being careful to install them in the correct positi...

Page 38: ...the black weather proof cover over the boards being careful not to pinch any of the wiring Note The 2 dipswitch counting from the bottom of the block is to enable a two character selection number and...

Page 39: ...ove the three 3 16 phillips screws holding the motor in place Reinstallation 1 Put new motor in place and line up all three screw holes 2 Install the three 3 16 phillips screws but don t tighten them...

Page 40: ...able 5 Mount the motor bracket assembly using the two 7 16 bolts Don t tighten them yet 6 Slide the assembly up so that the gear mesh is tight then back off 1mm and tighten the 7 16 bolts Ideal gear m...

Page 41: ...r to the assembly Installation 1 Connect the ribbon cable to the new motor 2 Mount the new motor using the three 3 16 bolts screws Do not tighten them yet 3 With the toothed arm in place put the white...

Page 42: ...ip into the hose where they can t be reached 6 Plug the connector into the new picker head 7 Tie wrap the wires to the picker head as they were before 8 Slide hose down into place and tie wrap the hos...

Page 43: ...k and have someone feed the wires through the hole as you carefully pull the other end through This will route the new wires to where the old wires were 7 Once the wire is fed under the freezer and to...

Page 44: ...the door top to break the silicon seal 7 Lift the Front Door Bubble Panel up by grabbing the delivery door opening and pull up and out 8 Before reinstalling the new Front Door Bubble Panel remove the...

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