2TABLE OF CONTENTS1. Safety Precautions .............................................32. Specification .......................................................53. Features.............................................................114. Location of Controls and Components ..........124.1 Indoor Unit ..................................................124.2 Outdoor Unit ...............................................124.3 Remote Control ..........................................125. Dimensions .......................................................135.1 Indoor Unit ..................................................135.2 Outdoor Unit ...............................................156. Refrigeration Cycle Diagram ...........................166.1 CU-E9RKUA CU-E12RKUA ......................166.2 CU-E18RKUA CU-E24RKUA ....................177. Block Diagram ..................................................187.1 CS-E9RKUAW CU-E9RKUACS-E12RKUAW CU-E12RKUA.................187.2 CS-E18RKUAW CU-E18RKUACS-E24RKUAW CU-E24RKUA.................198. Wiring Connection Diagram ............................208.1 Indoor Unit ..................................................208.2 Outdoor Unit ...............................................229. Electronic Circuit Diagram ..............................249.1 Indoor Unit ..................................................249.2 Outdoor Unit ...............................................2610. Printed Circuit Board .......................................2810.1 Indoor Unit ..................................................2810.2 Outdoor Unit ...............................................3011. Installation Instruction (E9RK and E12RK)....3311.1 Select the Best Location .............................3311.2 Indoor Unit ..................................................3411.3 Outdoor Unit ...............................................3812. Installation Instruction(E18RK and E24RK) .........................................4112.1 Select the Best Location .............................4112.2 Indoor Unit ..................................................4212.3 Outdoor Unit ...............................................4613. Operation Control .............................................4913.1 Basic Function ............................................4913.2 Indoor Fan Speed Control ..........................5013.3 Indoor Fan Motor Operation .......................5113.4 Outdoor Fan Motor Operation ....................5113.5 Airflow Direction..........................................5213.6 Quiet Operation (Cooling Mode/CoolingArea of Dry Mode) ......................................5313.7 Quiet Operation (Heating) ..........................5413.8 Powerful Mode Operation ...........................5413.9 Timer Control ..............................................5413.10 Auto Restart Control ...................................5513.11 Indication Panel ..........................................5513.12 ECONAVI and AUTO COMFORTOperation ....................................................5514. Operation Control(For Multi Split Connection) ............................5914.1 Cooling operation .......................................5914.2 Soft Dry Operation ......................................5914.3 Heating Operation ......................................5914.4 Automatic Operation(For Multi Split Connection Only) ...............6014.5 Indoor Fan Motor Operation .......................6014.6 Powerful Mode Operation ...........................6014.7 Auto restart control .....................................6014.8 Indication Panel ..........................................6015. Protection Control (E9RK and E12RK) ...........6115.1 Protection Control For All Operations.........6115.2 Protection Control For Cooling & Soft DryOperation ....................................................6316. Protection Control (E18RK and E24RK) .........6616.1 Protection Control For All Operations.........6616.2 Protection Control For Cooling & Soft DryOperation ....................................................6717. Servicing Mode .................................................7017.1 Auto Off/On Button .....................................7017.2 Cooling Only Operation(Single connection Only, Multi connectionplease refer to Multi outdoor manual).........7117.3 Remote Control Button ...............................7218. Troubleshooting Guide ....................................7318.1 Refrigeration Cycle System ........................7318.2 Breakdown Self Diagnosis Function...........7518.3 Error Code Table ........................................7618.4 Self-diagnosis Method ................................7819. Disassembly and Assembly Instructions ... 10719.1 CS-E9RKUAW CS-E12RKUAW ............ 10719.2 CS-E18RKUAW CS-E24RKUAW .......... 11119.3 Outdoor Electronic Controller RemovalProcedure ................................................ 11420. Technical Data ............................................... 11620.1 Cool Mode Performance Data ................. 11620.2 Heat Mode Performance Data................. 12021. Service Data ................................................... 12221.1 Cool Mode Outdoor Air TemperatureCharacteristic ........................................... 12221.2 Heat Mode Outdoor Air TemperatureCharacteristic ........................................... 12621.3 Piping Length Correction Factor.............. 13022. Exploded View and Replacement PartsList .................................................................. 13222.1 Indoor Unit ............................................... 13222.2 Outdoor Unit ............................................ 138