User manual LAE ELECTRONIC AT2-5

[. . . ] Before installing the instrument, please read these instructions carefully to ensure maximum performance and safety. Caution: if C-H=HEA all defrost functions are inhibited; if DFR=0 the timed defrost function is excluded; during defrost, the high temperature alarm is inhibited. [. . . ] During normal operation, the display shows either the temperature measured or one of the following indications: DEF REC OFF CL DO Defrost in progress Recovery after defrost Controller in stand-by Condenser clean warning Door open alarm HI LO E1 E2 Room high temperature alarm Room low temperature alarm Probe T1 failure Probe T2 failure Light control mode NON : light output not controlled. TLO Minimum probe 1 temperature recorded CND Compressor working weeks LOC Keypad state lock The output is switched on again after CRT minutes have elapsed since the previous switchover. SETPOINT (display and modification of desired temperature value) Press button for at least half second, to display the setpoint value. By keeping button pressed, use button or to set the desired value (adjustment is within the minimum SPL and the maximum SPH limit). STAND-BY Button , when pressed for 3 seconds, allows the controller to be put on a standby or output control to be resumed (with SB=YES only). KEYPAD LOCK The keypad lock avoids undesired, potentially dangerous operations, which might be attempted when the controllers is operating in a public place. SELECTION OF SECOND PARAMETER GROUP It's possible to select control parameters between two different pre-programmed groups, in order for the fundamental control parameters to be adapted quickly to changing needs. With IISM=MAN, changeover from Group I to Group II takes place for 2 seconds. Defrosting starts automatically when necessary time has elapsed to obtain the defrosting frequency set with DFR (IIDF). The internal timer is set to zero when power is applied to the controller and at each subsequent defrost start. When the controller is put on a standby, the accumulated time count is "frozen" (is not incremented). Defrosting may also be induced manually by keeping the button pressed for 2 seconds. [. . . ] When defrost is over, if DRN is greater than 0, all outputs will remain off for DRN minutes, in order for the ice to melt completely and the resulting water to drain. Moreover, if probe T2 is active (T2=YES), the fans will re-start when the evaporator gets to a temperature lower than FDD; Vice versa, if such condition does not occur after 4 minutes following defrost termination, the fans will be switched on anyway. [. . . ]