LAE electronic LF28 Instructions For Installation And Use Manual

LAE electronic LF28 Instructions For Installation And Use Manual Manual pdf 1 page image

Thank you for having chosen an LAE electronic product. Before installing the instrument, please read this instruction booklet carefullyin order to ensure safe installation and optimum performance.1. INSTALLATION1.1 LF28, size 105x90x55 mm (WxHxD), must be fitted to a DIN rail in such a position so as to prevent debris and moistureinfiltration which may cause serious damage and compromise safety.1.2 The instrument should work with room temperatures between -10°.. +50°C and relative humidity between 15%.. 80% inclusive.Supply voltage, switched powers and connection set-up should scrupulously comply with the indications given on the container. Toreduce the effects of electromagnetic disturbance, keep the flat connecting cable, the sensor and signal cables well separate fromthe power wires.1.3 The display unit LCD16 is secured to the panel by means of the two springs on the side of the box. The unit is mounted on thepanel through a 29x71 mm opening, exert a moderate pressure so as to get the LCD16 to align flush to the panel surface. The mainunit LF28 and the display unit LCD16 are connected to each other by means of the flat cable supplied in the package.1.4 The sensor T1 measures the air temperature and activates in the thermostat control cycle; it should be placed inside theappliance in a point that truly represents the temperature of the stored product. If enabled (T2=YES), the sensor T2 measures theevaporator temperature and should be placed where there is the maximum formation of frost. If enabled (T3=YES), the sensor T3should be located between the condenser fins, half way between the condenser inlet and outlet. The auxiliary sensor T4 can be usedto monitor the temperature of either a second evaporator (T4=2EU), or of a second condensing unit (T4=2CU) or disabled(T4=NON).CAUTION: should the relays have to switch a heavy load frequently, it is advisable to contact the manufacturer for indications on thelifetime of the contacts.Whenever products must be kept within very severe specifications or the products have considerable value, the use of a secondinstrument is recommended, which activates upon or warns of any malfunction.2. OPERATING MODESUpon switching on, just the central line (autotest) appears on the display for approximately three seconds and the subsequent indications dependon the operating status of the controller. TABLE 1 gives the indications associated with the various states, whereas the symbols appearing in thetext are explained in TABLE 2.2.1 STANDBY. If button is pressed for 3 seconds, it allows the LF28 to be put on a standby, or to resume output control (withINSTRUCTIONS FOR INSTALLATION AND USE.LF280LLF28003ENSTANDBY NORMAL INFO MENU INFO DATA SETUP MENU PARAMETERVALUEOFF -19 T1 -20 SCL 1°CNot Product Air Display scaleOperating Temper. (sim.) temperatureDEF T2 -25 SPL -25Defrost Evaporator Minimumtemperature setpointREC - - - - - - SPH -18Recovery after ... Maximumdefrost setpointHI TLO -19 - - - - - -High temp. Min. stored ....alarm temperature- - - CND 15 - - - - - -.... Condenser clean ....cycleE1 LOC NO - - - - - -Faulty T1 probe Locked keypadTABLE 1