Foster BC 21, Service Manual, Page: 4 / 32

Blast Chill & Shock Freeze Operating Instructions.
Standard Operation
When mains electrical power is first applied to the controller it will carry out a self-test function,
for approximately 3 seconds. During this period the display will show.
On completion of the self test, the controller will revert to the last chill program that was run
3
(Pre-chill, Soft Chill, Hard Chill, Hard Chill Max, Shock Freeze, Professional 1, Professional 2,
or Professional 3). The availability of these is dependent on how the controller has been
configured.
The example shows the controller in Hard Chill mode with the previous and next programs
indicated at the top of the display. To change the program rotate the dial, either clockwise or
anticlockwise to select the type of program you require.(for guidelines refer to page 7)
To initiate the program just press and release the dial for the program to start.
The program starts with the screen on the left being displayed for 2 minutes. After which the
intelligent probe determines if the cycle is controlled by time, displayed by the screen in the
middle, or by temperature as displayed by the screen on the right.
On completion of the program the controller will cause the blast chiller to enter the Hold Mode,
as displayed on the left. An alarm will sound, press and release the dial to cancel the alarm, if
the alarm is not cancelled the blast chiller will still enter the Hold Mode with the periodical
sounding of the alarm. To cancel press and release the dial.
To stop the blast chiller during operation, press and hold the dial for 2 seconds, the display returns to the program
selection screen.
At any time when the blast chiller is operational the dial can be rotated to give information on
the status of the particular mode of operation.
The display will remain for 10 seconds and then revert to the normal operating screen
automatically.