NW Global Vending – TECHNICAL MANUAL
This document was produced by MARK AC for the exclusive use of the technical personnel in the after-sales service.
. No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING
. All rights reserved.
New dispenser “KORO”
07/10/2005
page 37 / 42
The display indicates
the message
“B
OILER
”
The machine will lock if after the maximum
time of heating from the machine start, or
from the last selection, there is no signal of
correctly reaching the temperature set in
the software.
Check that the heating element and the STRC
card are functioning correctly.
Check that the overheating control systems
were not triggered.
Check the functioning of the probe (ohm
control)
Should the overheating protection be triggered
before resetting, the cause must be found and
eliminated.
The display indicates
the message
“CAN-BUS
BOARD
”
Failed dialogue between CPU board and
can-bus board that controls the SIGMA
BREWER unit.
Check the connections.
Check that the power supply is correct.
Replace the board.
The display indicates
the message
“C
OIN MECHANISM
”
(only if equipped with a
payment system)
The machine will lock if it receives an
impulse longer than two seconds on a
validator line or there is no communication
with the serial coin mechanism for more
than 30 seconds (executive protocol).
Or 75 seconds (BDV protocol)
Check that connection is correct and the
software setting is correct for the protocol.
If necessary replace the payment system.
The display indicates
the message
“G
RINDER BLOCKED
”
If the coffee grinder does not rotate or
rotates too slowly for longer than 5
seconds, the espresso coffee based
selections are disabled.
The grinder rotation is controlled by a sensor; if
no rotation is detected within 5 seconds, check:
That there are no blockages in the grinding
wheels.
That the overheating control systems on the
winding were not triggered.
That the sensor works correctly.
Check the activation of relay K16
The display indicates
the message
“E
SPRESSO UNIT
”
If the unit does not reach the initial standby
position after making a selection (checked
by a position micro-switch) the espresso
based selections are disabled.
The standby position is checked by a position
micro-switch, and every time the machine is
started the unit is checked.
If the change in the “on” condition is not read,
check that:
the motor is started, the position micro-switch
works correctly, the brewing chamber is not
clogged with too much coffee.
Check the activation of relay K7.
The display indicates
the message
“RAM
DATA
”
One or more areas of the RAM memory
contain altered or non-compatible data,
which is corrected by the software with
default setting data; therefore the machine
continues to operate with the initial data,
but initialise will be required.
Enter into the installation procedure and
initialise the software; if the failure persists
replace the CPU board.
The display indicates
the message
“F
RESH
-
BREWER PISTON
”
The default position is determined by the
micro-switches, and the position is factory
preset; if for any reasons they are not
triggered, FRESH-BREW coffee selections
are disabled.
The standby position is checked by a position
micro-switch, and every time the machine is
started the unit is checked.
check that:
the motor is started, the position micro-switch
works correctly, the brewing chamber is not
clogged with too much coffee.
the filter is not clogged.
Check the connection with the FB board
The display indicates
the message
“F
RESH
-
BREWER BRUSH
”
The default position is determined by the
micro-switches, and the position is factory
preset; if for any reasons they are not
triggered, FRESH-BREW coffee selections
are disabled.
The standby position is checked by a position
micro-switch, and every time the machine is
started the unit is checked.
check that: the brush is new and the motor is
activated.
That there are not any mechanical blockages.
Check the connection with the FB board
