
1) SETTING THE TEMPERATURE
When either the or push buttons is pressed the system enters the temperature setting mode and
the display shows the existing unchanged set point temperature. The two display decimal points flash on
alternately to confirm that the temperature setting mode is enabled. Further pressing of the push-buttons
cause the temperature to be increased or decreased respectively by 1°C at a time, but if either push-button
is held for longer than two seconds, the temperature is raised or lowered continuously at a rate of 3°C per
second for as long as the push-button is held. If the temperature reaches 99, further use for the push-button
cannot alter the temperature further nor if the temperature reaches 0°C the push-button will not have any
effect (note that setting a temperature below room temperature is irrelevant as the system has a heater
only).
If neither push-button is operated for longer than three seconds, the system automatically comes out of the
temperature setting mode and the flashing decimal points turn off. At the same time the final set temperature
value (TSET) is stored in memory; this value will be retrieved and subsequently used when the fountain is
next switched on.
2) TEMPERATURE CONTROL
When the fountain is switched on, the heater is always in the ON state initially, and the Heater LED is illumi-
nated. When the temperature has risen to T > TSET, the heater and its indicator LED are switched OFF.
When the temperature then falls to T < (TSET-1), the heater and indicator are switched ON again. Thus the
hysteresis band is 2°C. If the temperature sensor fails, or is unplugged from the control board, the heater
and the motor are both switched OFF, and the display shows “SF” (Sensor Fault).
3) MOTOR CONTROL
When the fountain is switched on, the motor is always in the OFF state initially, and the motor LED is off. The
motor is subsequently runs when the push-button is pressed, and the motor LED is illuminated. Subse-
quent operation of the push-button toggles the motor and indicator between the ON and OFF states.
However, if the motor is commanded to be ON and the chocolate bowl temperature is less than 10°C from
set temp, then the motor is inhibited and does not start. In this event, the display shows “LT”(Low tempera-
ture) for two seconds before it reverts to the normal temperature indication. This is to minimize possible
motor damage, as there is risk of the Auger being locked due to solid chocolate.
The motor also has a built-in thermal switch which opens if its temperature exceeds a safe limit. This switch
connects back to the controller to override normal motor operation. Whenever the thermal switch is open, the
motor drive is set to OFF, and the display shows “OL” (Over-Load) until the motor has cooled sufficiently to
reset the thermal switch. The motor can then be re-started manually by using the push-button.
Important information about the Control Panel
The control system switches the chocolate heater on and off such as to maintain the temperature at a
pre-set level, and switches the motor on and off as required.
There is a two digit LED display to indicate the temperature in degrees Centigrade, and also two individual
LED indicators which light when the heater and motor respectively are on. A membrane switch panel has a
pair of push-button switches for UP ( ) and DOWN ( ) control of the temperature, and a third push-
button commands the ON/OFF state of the motor.
CONTROL PANEL INSTRUCTIONS
Recommeded setting is 70°C for most chocolate.
See previous page. Do not run above 80°C.