© by NECTA VENDING SOLUTIONS SpA
26
07-2002 148 03
OVERHEAT PROTECTION
If the brewer unit locks, the software control shuts off the
power from the brewing unit motor.
The motor is however fitted with an overheat protection
device with automatic reset.
BOILER MAINTENANCE
According to the mains water hardness and to the number
of selections made, periodic descaling of the boiler is
necessary.
This operation should be carried out by qualified
technicians only.
The boiler must be removed from the machine for descaling.
Use only biodegradable, non toxic and mild products for
descaling. Thoroughly rinse all parts before reassembling
them.
When reassembling make sure that:
- the electrical contacts (terminals, fastons etc.) are
perfectly dry and correctly connected;
- the safety and anti-boiling thermostats are suitably
positioned and fastened;
- the hydraulic connections are correctly made.
IMPORTANT NOTICE!!!
If for any reasons the heating system of the boiler is
operated without water, before restarting the machine
the correct functioning of the boiler temperature
sensor should be checked.
If heating without water continues until the safety
thermostat is triggered (see hydraulic system) the
boiler temperature sensor will be permanently
damaged and it must be replaced.
ANNUAL SANITISING
At least once a year, or more frequently according to the use
of the machine and the quality of the inlet water, the entire
foodstuff circuit system must be cleaned and sanitized in
the following way:
- all parts of the hydraulic system in contact with food,
including the hoses, must be removed from the unit and
fully disassembled;
- all visible residue and product films are mechanically
removed using brushes or similar tools, if necessary;
- all components must be soaked in a sanitising solution for
at least 20 minutes;
- the unit internal surfaces are to be cleaned with the same
sanitising solution;
- thoroughly rinse and then reinstall the parts.
Before restarting the machine, the same sanitising
procedure described in section “Sanitising the food-
stuff circuits and the mixers” should be repeated.
PRINTED BOARD FUNCTIONS
AND INDICATOR LIGHTS
CPU BOARD
The C.P.U. (Central Processing Unit) board is housed in the
coin mechanism compartment; this board controls the
communication with the control board and processes the
input signals from the Key-pad, the payment system and
controls the display.
The board houses the EPROM (the chip containing the
program) and a series of minidips (see Fig. 20) which allow
configuration of the board according to use of the machine
(see relevant chapter).
The card also houses some LEDs which, during the
machine operation, give the following indications:
- Green LED (2): blinks during normal operation of the
C.P.U. board;
- Yellow LED (3): glows when 5 VDC are detected;
- red LED (4): glows in the event of a program error;
- red LED (5): glows during the card reset.
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