Service manual

T-8
06/2005
ERROR PROBABLE CAUSE CORRECTIVE ACTION
Bill validator takes
a bill but does not
establish credit.
Defective validator harness (credit
not getting from validator to control
board through the harness).
Make sure that the validator and harnessing is correct for your style of
validator and it is plugged in and wired properly.
Defective validator. Replace/test validator.
Defective control board. Replace/test control board.
Bill validator takes
a bill and credits
but not erasing
credit.
Defective bill validator
. Replace validator and test acceptance and erasure of credit.
Defective control board. Replace/test control board for erasure of credit.
Both vend sensors are defective. Replace vend sensor.
Validator takes
a bill and allows
payback of
coins without a
selection.
Configurations not set properly in
control board.
Access vendor configuration mode and check the “Force Vend” setting.
VENDING PROBLEMS
Multiple vending
(not canceling
credit).
If multiple vending is from all
selections, delivery sensor is cut,
improperly grounded, or defective.
Replace sensors and test.
NOTE: If both sensors are not
present or are defective, the V21
will allow up to four products from
each column to be vended before
the column is determined to be
sold out.
Replace sensors and test.
Depth setting on partition not
adjusted correctly
.
Move can clip to proper position (refer to loading diagram on machine).
Mechanical Error. Check for correct operation of the motor, gate link, bucket and gate.
Wrong product
vending upon
selection.
Misload by vendor loader
. Ensure that all product within each column is the same.
Space-to sales not set properly. Look for StS error. Check or reset space-to-sales.
Miswired selection. Check the wiring from the controller to the selection switches. Test
selection switches.
No vend upon
selection.
Delivery sensor is malfunctioning
or a column is jammed or sold out.
Check to see if the delivery chute sensor LED is constantly on. If so,
replace vend sensor
.
Defective controller board. Unplug the sensors connection from the control board. W
atch LED. If the
sensor LED stays on, replace the defective control board.
Dry Vend (No
refund).
Premature vend detection. T
ap on chute and check for a green flashing light on the control board. If
no light is flashing or light is constantly on, replace sensors.
Completely sold
out.
Check to see if blocking is
enabled.
Change time or turn of
f blocking.
Check if vend sensor is
unplugged.
Plug back in.
Space to sales has been cleared. Reinitiate space to sales.
MISCELLANEOUS PROBLEMS
Display shows
sold out
immediately upon
pressing selection
button of full
column (sold out
not clearing).
Door switch wired incorrectly or
cut/pinched.
Manually press door switch. If lights and fan don’t come on, check wiring
or replace door switch.
Control board. If door switch is replaced and still reading sold out, replace control board.
V
endor appears
dead; no digital
display and no
lights.
Defective main harness or
secondary power harness to the
transformer
.
Check transformer.