XJK-LG5 Refrigerated Air Dryer Controller User ManualThanks for your choose XJK-LG5 refrigerated air dryer controller, please read the manual before use. And operation should be complied with the manual.I Main Function●Local/Remote control the work of compressor and drain valve automatically●Link signal control the work of controller●Detect temp. of each part of system●LCD display running/alarm information and parameter value●Output alarm signal●Communication with PC (RS485)●Output a start signal for subordinate after compressor workII Technical Data●Rating voltage: AC220V(+15%，-20%).●Analogy input: 5 channels of temperature● 6 channels of relay output (include energize, Y, △, drain, alarm, subordinate machine start)If the voltage of contact is AC 220V, then the sensitive load current of contact is 0.8A, the resistance current of contact is 2A.●Digital input signal: 4 buttons (include =, △, ▽, run/stop), alarm signal (N.C), link start signal.●Display: 128×32 lattice LCD screen, 2.99’’ (76mm) wide by 0.98’’ (25mm) tall.●Shell size: 218×150×115. It’s panel-mount, the recommended panel cutout for the controller is8.27’’ wide (210mm) by 5.51’’ tall (140mm).III Display1. LCD2-4. light-emitting diode alarm5-8. button9. light-emitting diode compressor work10. light-emitting diode inlet gastemperature too high.11. light-emitting diode dew pointtemperature too high12. light-emitting diode drain valve workIV Explanation for parametersTo successfully program this controller, you must first understand how it works and what you are programming into it.Model LG5 controller has 3 class of parameter, class 1 for normal use, class 2 for compensation and other important parameter, class 3 for upper limit of total work time.Note 1: work procedure of drain valve, please see section VI.Note 2: if preset value of ‘return-dew point’> preset value of ‘dew point’, shield dew point take part in control logic.Note 3: after lock time, press ‘RUN/STOP’, output relay of ‘Energize’ and ‘Y’ are closed, compressor start to work, and light-emitting diode 9 (compressor) light. After time of preset of ‘T-switch’, output relay of ‘Y’ is open and output relay of ‘△’ is closed, Y/△connection finished.Note 4: preset value of ‘address’ should be equal to the address set in host monitor software.Note 5: compressor stop work or controller is energized, count down the preset value of ‘lock time’, enter into lock protect state, controller not answer any order.Note 6: after receive the link start signal, controller no start to work immediately, it will delay the time of preset of ‘up delay’.Note 7: if the preset of ‘total’ is 0 means that there is no upper limit for total work time. If the preset is nonzero, and the total work time is up to the preset (LCD is bright, but display nothing, and light-emitting diode 4 twinkles), the controller doesn’t answer any order when restart it. Modify the preset value of ‘total’can make the controller work again.Note 8: the new password should press ‘=’button to make it effective. And next time, input the new password.V ProgramAfter energizing, the controller enters into lock protect state, as figure 10. After lock time, enters to standby state, as figure 8.1) Program class 1 parameterPress ‘=’ button in standby mode to enter into program mode. And the LCD will display as the figure 1. Current parameter value is displayed in black background. Press ‘△/▽‘ button to add or minus the presetvalue. E.g. if the preset value of ‘inlet gas’ displays in black background, means current parameter is ‘inlet gas’, press ‘△/▽‘ button to modify the value. Press ‘△’ button to add, the upper limit of ‘inlet gas’ is 120. Press ‘▽‘ button to minus, the lower limit of ‘inlet gas’ is -19. Press ‘△/ ▽‘ button continually, the value add or minus quickly.Figure 1Press ‘=’ button to choose the next parameter. Show as the figure 2.Figure 2Note 9: if the preset of dew point difference > the preset of dew point, means the dew point is only used to display, and not take part in control.When you finish program and wish to exit program mode, press ‘run/stop’button. Or if there isn’t any press action within 10 seconds, the controller will save changed value and exit program mode automatically.2) Program class 2 parameterPress ‘=’ and ‘△’ buttons at the same time in program mode, LCD displays junior password input screen, as following figure.Figure 3Default password is 666, and can’t be changed. Press ‘△/▽‘button to input correct password. Press ‘=’button to confirm the input password. If it’s right, the LCD will display as figure 4. But if it’s wrong, the LCD will display as figure 1.Figure 4Press ‘=’ button to choose the next parameter, until the LCD display as figure 5.Figure 5Modify the preset value of parameter as class 1 parameter. Press ‘△/▽‘button to add or minus the preset value. Press ‘=’ button to save and return to class 1 parameter setting screen, as figure 1.3) Program class 3 parameterPress ‘=’ and ‘▽‘ buttons at the same time in program mode, LCD displays senior password input screen, as following figure.Figure 6Default password is 888, and it can be changed. Press ‘△/▽‘button to input correct password. Press ‘=’button to confirm the input password. If it’s right, the LCD will display as figure 7. But if it’s wrong, the LCD will display as figure 1.Figure 7Modify the preset value of parameter as class 1 parameter. Press ‘△/▽‘button to add or minus the preset value. Press ‘=’ button to save and return to class 1 parameter setting screen, as figure 1.When senior password is changed, it need to press ‘=’ to confirm, then press ‘run/stop’ to exit the program mode.3) SaveWhen you finish program and wish to exit program mode, press ‘run/stop’button. Or if there isn’t any press action within 10 seconds, the controller will save changed value and exit program mode automatically.VI UseWork procedure of refrigerated air dryer:Press ‘Run/Stop’ button when no alarm signal，refrigerated air dryer start to work, compressor is on. The port of ‘energize’and ‘Y’connected with port ‘COM’(KM1, KM2 are on), LCD displays ‘Main:ON’, and light-emitting diode 9 light. After setting value of ‘T-switch’ (Y-△switch time), ‘Y’ disconnected with port ‘COM’ (KM2 is off) and port ‘△’connected with port ‘COM’ (KM3 is on). Y-△connection swtich procedureis finished, compressor work normally.If compressor doesn’t need Y-△swtich protection, connect the compressor to port ‘energize’ directly. Work procedure of drain valveAfter compressor start to work, controller control drain valve automatically. Delay preset time of ‘Drain OFF’, then open the drain valve for preset time of ‘Drain ON’.Figure 8Start controller:There are three start method. Local start, remote start and link start.Compressor start to work should conform to following condition.①no alarm signal (compressor overload, high pressure alarm, low pressure alarm)②detected dew point ≥ preset value of ‘dew point’Remote control mode: connect port ‘L+’ and port ‘local/remote’ to choose remote control. When controller in work status and choose remote control mode, controller will stop and wait remote start signal. In remote control status, light-emitting diode 2 twinkles and LCD displays ‘Remote: ON’ or ‘Remote OFF’ in leftbake corner. LCD displays as following figure:Figure 9Link start is always valid no matter in local control mode or remote control mode. In local control mode if link start signal is input, light-emitting diode 3 twinkles and LCD displays as figure 10. In remote control mode if link start signal is input, light-emitting diode 2 twinkles in remote control mode, and LCD displays as figure 9.①local start: press ‘Run/Stop’ button, light-emitting diode 3 light, LCD displays as figure 10.Figure 10①Remote start: port ‘L+’ and port ‘local/remote’ are connected, and port ‘L+’ and port ‘remote start’are connected. light-emitting diode 3 light, LCD displays as figure 9.②Link start: when port ‘L+’ and port ‘link signal’ are connected, controller will be started after the time ofsetting of ‘up delay’, .Stop controller:①Press ‘‘Run/Stop’ button to stop controller in any control mode, it has priority.②Disconnect port ‘L+’ and port ‘remote start’ in remote control mode.③Disconnec port port ‘L+’ and port ‘link signal’ if link start signal is input.Controller enters into lock protect mode, LCD displays as figure 11.Figure 11After lock time, controller enters into standby status, LCD displays as figure 12.Figure 12Display other detected temperatureIn running or standby mode, press ‘△’ button to make the LCD display other detected temperature.VII AlarmIn running mode, if alarm signal is input, LCD displays as following. See table 4 for details.Figure 13Note 10: alarm signal type is N.C, so when port ‘L+’ and port ‘Alarm signal’ are disconnected, controller output alarm signal, and LCD displays as figure 13.Inlet gas high temperature alarm:If the temperature of inlet gas is higher than preset value of ‘inlet gas’, light-emitting diode 10 twinkle, and the value will be displayed in black background, as figure 14 shows. And alarm phenomena will be disappear when inlet gas temp. is lower than value of ‘inlet gas’.Figure 14Total work time:If the LCD displays nothing, and the light-emitting diode 4 light, means that the total work time has gotten up to the preset of ‘total time’. Then the controller will not answer any operate action, except enters into program mode and modify the ‘total time’. If the preset of ‘total time’ is ‘0’, means exit this function, the total work time has no time limit.VIII C onnectionSee figure 15 for details.Figure 15。