Haier AD18LS1ERA Service Manual

Also see for 3U19FS1ERA: Service manual Installation manual

Haier AD18LS1ERA Service Manual Manual pdf 98 page image

6.2. Trouble Shooting:Trouble 1: No display on the operation panelstartnocheck if displaypanel and theunit matchedwellno noyesreplace displaypanel and checkagainif the red diodeand green diodeon indoor PCBflash in turnyes yesif the powerterminal block is220V inputcheck the terminalblock and thepower supplyPCB is faulty,replace itcheck if displaypanel is 12Vpower supplyno no nocheck if powerwiring is in opencircuityes yes yescheck if fuse isburntPCB is faulty,replacedisplay panelcircuit is damaged,replace itreplace powerwiring andcheck againreplace the fuseand check againTrouble 2: Sensor failurestartnoas per the wiringdiagram,check theconnectionbetween sensorand PCB is correctre-fix the sensorand check againcheck if sensor is inopen circuit or PCBport is not in goodconditionyesyes yesno nocheck if sensorresistor value iscorrectreplace sensorand check againreplacesensor andcheck againPCB is faultyand repalce it,check again -97-