With the parameter IISM you select if the changeover from Group I to Group II is made manually via the button (IISM=MAN), or
automatically when heavy duty operation is detected (IISM=HDD) or inhibited (IISM=NON). The activation of Group II is signalled by
the lighting up of the relevant LED on the controller display.
9.2 The automatic detection of “heavy duty operation” allows the control parameters to be modified in response to the specific
temporary needs of the refrigerator, such as: warm food being put into the cabinet, door being opened frequently etc. Control sensitivity
to switch over from Group I to Group II is determined by parameter HDS (1=minimum, 5=maximum). An example of how to use such
function is reported in the following table:
If we apply the above example to a refrigerator in a restaurant kitchen the controller will use the parameters of Group I during the closing
times of the kitchen, when the need for cooling is minimum, therefore we can consider this as a “normal” operation condition. Group I
“economy control” parameters will ensure both an optimum foodstuff preservation and considerable energy saving. Alternatively, during
very busy periods (door being opened continuously to take out or load food), the controller will automatically select Group II to try and
maintain the average product temperature within correct values (lower setpoint), limit compressor wear by reducing the number of starts
(higher hysteresis), avoid long defrost pauses which will worsen the preservation condition (lower defrost frequency or no defrosts at all),
increase product cooling speed by keeping ventilation always active (FCT=NO). When the heavy duty period is over, the controller will
automatically resort back to Group I.
NOTE: To make the automatic detection IISM=HDD work better, it is suggested that the value of hysteresis is not set too narrow (less than
2°K) or the value of CRT is not set too high (longer than 2 minutes)
9.3 The controller is provided with a serial port for connection to a PC or a programmer. In the first case it is important to assign to the
parameter ADR a different value for each linked unit (peripheral address); with automatic programming, ADR should remain on 1.
WARRANTY
LAE electronic SPA guarantees its products against defects due to faulty materials or workmanship for one (1) year from the date of manufacture shown on the container.
The Company shall only replace products which are shown to be defective to the satisfaction of its own technical services. The Company shall not be under any liability
and gives no warranty in the event of defects due to exceptional conditions of use, misuse or tampering.
LAE electronic does not accept units back unless LAE electronic has previously given its allowance or request.
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