2 - Key DOWN : Used for decreasing the values to be set and for selecting the parameters.
3 - Key UP/DEFROST : Used for increasing the value to be set, for selecting the parameters and for activating manual defrosting.
4 - Key U : It can be programmed via the parameter “USrb” to turn- ing on and off (stand-by) the device. In the “hidden” parameter pro- gramming mode it’s used to modify the visibility of the parameters (see par. 2.4).
5 - Led SET : Indicates the input in programming mode and the programming level of the parameters. It also serves to indicate the Stand-by status.
6 - Led OUT : Indicates the compressor output status (or the tem- perature control device) on (on), off (off) or inhibited (flashing).
7 - Led DEF : Indicates defrosting in progress (on) or dripping (flashing).
8 - Led AL : Indicates the alarm status (on), off (off) and silenced (flashing)