Dixie Narco Pre SRS 90 SP User manual

DIXIE-NARCO
VENDERS
TROUBLESHOOTING
GUIDE
Includes:
PRE-SERIES 90 SINGLE PRICE
REFRIGERATION TROUBLESHOOTING
January 1998
3330 Dixie-Narco Blvd.
P.O. Drawer 719
Williston, South Carolina 29853
Ph: [phone]

TABLE OF CONTENTS
Page 2of 23
TABLE OF CONTENTS
PRE-SERIES 90 SINGLE PRICE TROUBLESHOOTING Pages 29 -30
Sample Wiring Diagrams ...............................................................................................................................................Pages 37, 38, and 39
REFRIGERATION TROUBLESHOOTING Pages 77 -83
Product Hot:
Compressor will not run...................................................................................................................................................Page 78
Compressor starts, but will not continue running.............................................................................................................Page 79
Miscellaneous....................................................................................................................................................................Page 80
Product Cold But Not Cold Enough:
Compressor runs but will not cool product......................................................................................................................Page 81
Product Too Cold or Frozen
Compressor runs too long or continuously.......................................................................................................................Page 82
Noisy Refrigeration Unit...................................................................................................................................................................Page 82
Excessive Condensate........................................................................................................................................................................Page 83

SIID 2-BUTTON PROGRAMMING TROUBLESHOOTING
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GENERAL INFORMATION
VENDER SAFETY PRECAUTIONS
Please read this manual in its entirety. This service information is intended to
be used by a qualified service technician, who is familiar with proper and safe
procedures to be followed when repairing, replacing, or adjusting any Dixie-
Narco vender components. All repairs should be performed by a qualified
service technician who is equipped with the proper tools and replacement
components, using genuine Dixie-Narco factory parts.
Repairs and/or servicing attempted by uninformed persons can result in hazards
developing due to improper assembly or adjustments while performing such
repairs. Persons not having the proper background may subject themselves to
the risk of injury or electrical shock which can be serious or even fatal.
IF THE VENDER TROUBLESHOOTING PROCEDURES COVERED IN THIS MANUAL FAIL,
CONSULT THE DIXIE-NARCO FACTORY SERVICE DEPARTMENT AT
[phone].
Note: Have the vender model number and serial number available.
Example:
Model# 368-8 SIID
Serial# 0001-6414BV.

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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PRE-SERIES 90 SINGLE PRICE VENDERS
TROUBLESHOOTING
Vend/Cam-Hold/By-Pass Switch
Prior to 0001-3162AO
(Includes Production Runs 3164AO, 3166DN, and 3167AO)
(Except 3161AO-1954 to 2003 and 2656 to 2705)
Prior to 1st Quarter 1990

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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PRE-SERIES 90 SINGLE PRICE
TROUBLESHOOTING
HOW TO CORRECT COMMON VENDING TROUBLES
Note: When one or more circuits become inoperative on a Dixie-Narco Single Price vender that has
been operating satisfactorily, it is usually one component that has failed and it is with this in
mind that the following troubleshooting schematic is presented.
Control panel
Electrical Feed
Through Normally Closed of Each Select Switch
Figure 1
1→2
↑↓
34
↑↓
56
↑↓
78
Figure 2
[1 &2]
↑↓
34
↑↑
56
↑↑
78
Figure 3
1→2
↑↓
34
↑↓
56
Figure 4
[1 &2]
↑↓
34
↑↑
56
Figure 5
[1 &2]
↑4
↑5
[3 &8]
6&7
Figure 6
1
↑
2
↑
3
↑
4
↑
5
↑
6
↑
7
↑
8
(CONTROL PANEL: Select Button / Select Switch Location)
The control panels shown above represent some of the panels used on Dixie-Narco venders.
IMPORTANT: Keep in mind the feed of electrical current through the select switches. The electrical feed
always begins with the largest odd number and proceeds as:
Fig. 1 7, 5, 3, 1, 2, 4, 6, 8 Fig. 5 7, 5, 3 & 8, 1 & 2, 4, 6
Fig. 2 7, 5, 3, 1 & 2, 4, 6, 8 Fig. 6 8, 7, 6, 5, 4, 3, 2, 1
or
Fig. 3 5, 3, 1, 2, 4, 6
or
Fig. 4 5, 3, 1 & 2, 4, 6
On the inside of the control panel, the select buttons and switches are numbered to assist in identifying them. If
not numbered, then push button arrangements are as shown in one of the foregoing diagrams (i.e. figure 1, 2, 3, 4,
5, or 6).

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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Fig. 5 represents a control panel in actual use on a production model vender. (There are other control panels
similar to it.) The control panel is shown to emphasize the need to know the actual location of the various push
button select switches so that the electrical feed can be followed from select switch to select switch as already
outlined.

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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ACCEPTS COINS WILL NOT VEND
FROM ONE OR MORE COLUMNS
Although all circuit problems are not necessarily found to be one or more inoperative select switches, the examples
listed below are typical of select switch problems occurring in the control panel.
Refer to figure 1, page 31.
1. Problem: Selections 7 and 5 work.
Selections 3, 1, 2, 4, 6, and 8 do not work.
Troubleshooting: Recall the feed of electrical current at 7, 5, 3, 1, 2, 4, 6, and 8.
A) Check the normally closed and common of select switch 5.
B) Check the normally open and common of select switch 3.
2. Problem: Selection 7 works.
Selections 5, 3, 1, 2, 4, 6, and 8 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 7.
B) Check the normally open and common of select switch 5.
3. Problem: Selections 7, 5, 3, 1, 2, 4, and 6 work.
Selection 8 does not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 6.
B) Check the normally open and common of select switch 8.
Refer to figure 2, page 31.
4. Problem: Selection 7 works.
Selections 5, 3, 1, 2, 4, 6, and 8 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 7.
B) Check the normally open and common of select switch 5.
5. Problem: Selections 7, 5, 3, [1 & 2] work.
Selections 4, 6, and 8 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch [1 & 2].
The symbol [ ] (i.e. [1 & 2]) indicates that one select switch serves two circuits.
B) Check the normally open and common of select switch 4.
Refer to figure 3, page 31.
6. Problem: Selection 5 works.
Selections 3, 1, 2, 4, and 6 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 5.
B) Check the normally open and common of select switch 3.

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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7. Problem: Selections 5, 3, and 1 work.
Selections 2, 4, and 6 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 1.
B) Check the normally open and common of select switch 2.
Refer to figure 5, page 31.
8. Problem: Selections 7 and 5 work.
Selections [3 & 8], [1 & 2], 4, and 6 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 5.
B) Check the normally open and common of select switch [3 & 8].
The symbol [ ] (i.e. [1 & 2] and/or [3 & 8]) indicates that one select switch
serves two circuits.
9. Problem: Selections 7, 5, [3 & 8], [1 & 2] work.
Selections 4 and 6 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the normally closed and common of select switch 1 & 2.
The symbol [ ] (i.e. [1 & 2] and or [3 & 8]) indicates that one select switch
serves two circuits.
B) Check the normally open and common of select switch 4.
Refer to figure 4, page 31.
10. Problem: Selections 5 and 3 work.
Selections [1 & 2], 4, and 6 do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check normally closed and common of select switch 3.
B) Check the normally open and common of select switch [1 & 2].
The symbol [ ] (i.e. [1 & 2]) indicates that one select switch serves two circuits.
ACCEPTS COINS
WILL NOT VEND
1. Problem: All selections do not work.
Troubleshooting: Recall the feed of the electrical current.
A) Check the coin changer.
B) Check the vend relay.
C) Check the select switch that gets power first.

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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SERIES 90 SINGLE PRICE TROUBLESHOOTING
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ACCEPTS COINS
WILL NOT VEND FROM ONE COLUMN
1. Problem: Accepts coins but will not vend from one column. (Ex. Select #3 will not vend).
Troubleshooting: A) Check the normally open of select switch 3.
(Note: If the sold-out lamp comes on when the button is pushed, the select switch
is O.K.)
B) Check the sold-out switch in the vending circuit.
C) Check the vend motor.
(Note: If the vend motor runs by depressing the vend switch, the vend motor is
O.K.)

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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REJECTS ALL GOOD COINS
1. Problem: The coin changer will not accept coins.
Troubleshooting: A) Make sure there is product in each column. The sold-out lamps are off.
B) Follow the arrows from left to right.
C)
1. Push vend motor switch (motor F) -vend motor cycles.
2. Push vend motor switch (motor E) -vend motor cycles.
3. Push vend motor switch (motor D) -vend motor cycles.
4. Push vend motor switch (motor C) -vend motor does not cycle.
*The problem is the vend motor switch and by-pass switch on motor C and/or
motor D.
5. If the problem is not found, continue this procedure through motors B and A.
6. If the problem is not found, check the vend relay.
7. If the problem is not found, the last component to check would be the coin
changer.

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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DRIFTING MOTOR AND JACK POTTING PROBLEM
1. Problem: The vend motor drifts, both switch arms drop into the cam notch and the vend motor keeps
running.
Troubleshooting: A) Check Vend Motor Switch on problem Vend Motor; replace if faulty.
B) Check Vend Motor Switch arm relationship to the cam of the Vend Motor. Reform
arm if needed or replace Vend Motor Switch.
C) Check the Pawl for looseness. If it is tight, replace Pawl or Vend Motor.
D) Check the Pawl Spring. If it is off, elongated, or broken, replace the Pawl Spring.
E) Check Actuator. If Actuator sticks to stator due to syrup, clean stator. If Actuator
is tight, clean actuator at pivot or replace the Vend Motor.
F) Check the brake clutch -2 projections on the clutch. If broken, replace the Vend
Motor.
2. Problem: Two cans are delivered in a given cycle and the next cycle is a dry vend.
Troubleshooting: A) Check for proper shimming and set-up of package being vended.
B) Check for proper cam setting for package being vended.
3. Problem: Two cans are delivered in each cycle.
Troubleshooting: A) Check for proper shimming and set-up of package being vended.
B) Check for proper cam setting for package being vended.
C) Follow troubleshooting procedure for problem 1.
4. Problem: Pre-Select (i.e. set-up a credit, press no Select Button and product is vended)
Troubleshooting: A) Check Select Switch, sticking, wired incorrectly, or faulty. Repair or replace as
needed.
ACCEPTS COINS AND WILL VEND THEN, REJECTS COINS
BUT WILL CONTINUE TO FREE VEND
1. Problem: Set-up a credit, press a Select Button and it vends; Press same Select Button and it vends again;
try to insert coins and coins are rejected; press selection and it vends again.
Troubleshooting: A) Check By-pass Switch on problem column. Check for sticking plunger, wired
incorrectly, or faulty. Repair or replace as needed.

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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HOW THE CLUSTER OF SWITCHES WORKS
1. See Vend Motor and cluster switches in stand-by position Figures 1 and 2.
Arm of Vend Motor Switch A is in cam notch -Figure 2.
Arm of Cam-Hold Switch B is on top of cam -Figure 2.
Arm of By-Pass Switch C is on top of cam -Figure 2.
2.
A) Set-up credit.
B) Push a selection. (Pushing of a select switch causes the vend motor to run and the arm of the cam-hold
switch to drop into the cam notch). Then...
C) the cam-hold switch runs the Vend Motor through the notch and
D) the arm of the Vend Motor switch reaches the top side of the cam and breaks the circuit to the vend
relay (cancels credit) and causes the vend motor to continue to run.
E) A fraction of a second later, the bypass switch arm reaches the top side of the cam and forms a bypass
around the vend motor switch. If a jam occurs, all other circuits work.
F) The vend motor continues to run to stand-by position..
FIGURE 1
VIEW OF VE
ND MOTOR
FIGURE 2
VIEW OF SWITCHES

SERIES 90 SINGLE PRICE TROUBLESHOOTING
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SERIES 90 SINGLE PRICE TROUBLESHOOTING
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SERIES 90 SINGLE PRICE TROUBLESHOOTING
Page 41 of 23

REFRIGERATION TROUBLESHOOTING
Page 77 of 23
PRODUCT HOT
Possible Cause: Compressor starts, but will not keep running.
WHAT TO CHECK SOLUTION
1. Is the temperature control knob set on its highest setting?
YES
2. Domestically, is the voltage supply between +/-10% of rating on the
serial plate?
YES
3. Is the condenser clear of obstructions?
YES
4. Is the condenser fan blade turning?
YES
5. Is the condenser fan motor operational?
YES
6. Is the temperature control operational?
YES
7. Is the tube from the compressor to condenser free of kinks?
YES
8. Is the capillary tube free of kinks?
YES
9. Is the thermal overload operational?
YES
10. Is the start relay operational?
YES
11. Consult the Dixie-Narco Factory Service at 1-800-688-9090 or your
Dixie-Narco Representative.
NOTE: Have the vender Model & Serial number available.
1. NO, adjust the knob to a higher
setting.
2. NO, consult the power company.
3. NO, clear or clean.
4. NO, free the obstruction or check
the blade if needed.
5. NO, check.
6. NO, check.
7. NO, repair or check.
8. NO, check.
9. NO, check.
10. NO, check.
11. NO, check.

REFRIGERATION TROUBLESHOOTING
Page 78 of 23
PRODUCT HOT
Possible Cause: Miscellaneous.
WHAT TO CHECK SOLUTION
1. Is the evaporator fan motor working?
YES
2. Has the refrigeration system lost its charge?
No
3. Consult the Dixie-Narco Factory Service at 1-800-688-9090.
or your Dixie-Narco Representative.
NOTE: Have the vender Model & Serial number available.
1. NO, check motor.
2. YES, check the refrigeration
system.

REFRIGERATION TROUBLESHOOTING
Page 79 of 23
PRODUCT COLD BUT NOT COLD ENOUGH
Possible Cause: Compressor runs, but won't cool product.
WHAT TO CHECK SOLUTION
1. Is the temperature control knob set properly?
YES
2. Domestically, is the voltage supply between 103V and 127V?
YES
3. Is the temperature control probe located properly?
YES
4. Is the condenser clear of obstruction?
YES
5. Is the evaporator fan free of obstruction?
YES
6. Is the condenser fan free of obstruction?
YES
7. Is the evaporator free of ice?
YES
8. Is the temperature control operational?
YES
9. Is the evaporator fan operational?
YES
10. Is the condenser fan motor operational?
YES
11. Is the refrigerant tubing free of kinks?
YES
12. Is the overload operational?
YES
13. Is the start relay operational?
YES
14. Is there refrigerant in the system?
YES
15. Consult Dixie-Narco Factory Service 1-800-688-9090 or your DN
Representative.
1. NO, adjust to desired setting.
2. NO, consult the power company.
3. NO, correct its position.
4. NO, clear, clean, or space the
vender properly.
5. NO, free any obstruction or
check.
6. NO, free any obstruction or
check.
7. NO, defrost & check the
following: gasket seal, port door
seal, refrigerant charge.
8. NO, check.
9. NO, check.
10. NO, check.
11. NO, repair or check.
12. NO, check.
13. NO, check.
14. NO, charge system and check
for leaks.

REFRIGERATION TROUBLESHOOTING
Page 80 of 23
NOTE: Have vender Model & Serial number available.