Si-71ATable of Contents iii3DUW#8 7URXEOHVKRRWLQJ 111111111111111111111111111111111111111111111111111111111111111 :81. Maintenance Inspections ......................................................................771.1 Optimal Operation Condition ..................................................................772. How to Handle Request for Maintenance .............................................802.1 Flow Chart ..............................................................................................803. Troubleshooting Based on Equipment Condition..................................813.1 Troubleshooting Based on Equipment Condition ...................................813.2 Equipment does not Operate .................................................................823.3 Fan Operates, but Compressor does not. ..............................................833.4 Cooling/Heating Operation Starts but Stops Immediately. .....................843.5 After Equipment Shuts Down, It cannot be Restarted for a While..........853.6 Equipment Operates but does not Provide Cooling. ..............................863.7 Equipment Operates but does not Provide Heating. ..............................873.8 Equipment Discharges White Mist .........................................................883.9 Equipment Produces Loud Noise or Shakes..........................................893.10 Equipment Discharges Dust...................................................................903.11 Remote Controller LCD Displays "88". ...................................................914. Procedure of Self-Diagnosis by Remote Controller ..............................924.1 The INSPECTION/TEST Button.............................................................924.2 Self-Diagnosis by Wired Remote Controller...........................................934.3 Fault Diagnosis by Wireless Remote Controller.....................................944.4 Remote Controller Display Malfunction Code and Contents ..................965. Procedure of Self-Diagnosis by LED.....................................................975.1 Troubleshooting by LED on The Indoor Unit’s .......................................975.2 Troubleshooting by LED on The Outdoor Unit’s PC Board ....................976. Troubleshooting by Remote Controller Display / LED Display..............986.1 Explanation for Symbols.........................................................................986.2 Malfunction Code and LED Display Table..............................................996.3 Failure of Indoor Unit PC Board ...........................................................1016.4 Malfunction of Drain Water Level System (Float Type)........................1026.5 Indoor Unit Fan Motor Lock..................................................................1036.6 Swing Flap Motor Malfunction / Lock ...................................................1046.7 Failure of Capacity Setting ...................................................................1056.8 Malfunction of Heat Exchange Temperature Sensor System ..............1066.9 Malfunction of Suction Air Temperature Sensor System......................1076.10 Actuation of Safety Device ...................................................................1086.11 High Pressure System (HPS) Malfunction ...........................................1096.12 Low Pressure System (LPS) Malfunction.............................................1106.13 Malfunction of Electronic Expansion Valve ..........................................1116.14 Discharge Pipe Temperature Malfunction ............................................1126.15 Malfunction of High Pressure Switch....................................................1136.16 Malfunction of Outdoor Temperature Sensor System ..........................1146.17 Malfunction of Discharge Pipe Temperature Sensor System...............1156.18 Malfunction of Heat Exchanger Temperature Sensor System .............1166.19 Lack of Gas Malfunction.......................................................................1176.20 Reverse Phase.....................................................................................1186.21 Malfunction of Transmission (Between Indoor and Outdoor Unit)........1196.22 Malfunction of Transmission(Between Indoor Unit and Remote Controller) .....................................1216.23 Transmission Error Between Main Remote Controllerand Sub Remote Controller..................................................................122