Contents 
1 Safety Notices (Please be sure to abide them) ....................................................... 1 
2 Product Introduction ................................................................................................. 3 
2.1 Names of Key Components ................................................................................................. 3 
2.2 Rated Working Condition ..................................................................................................... 3 
3 Preparations for Installation ..................................................................................... 3 
3.1 Standard Fittings ................................................................................................................. 4 
3.2 Location for Installation ........................................................................................................ 4 
3.3 Requirements for Communication Line ............................................................................... 5 
3.4 Wiring Requirements ........................................................................................................... 7 
4 Installation Instructions ............................................................................................ 8 
4.1 Installation of Indoor Unit ..................................................................................................... 8 
4.2 Pipe Connection ................................................................................................................ 10 
4.3 Installation and Test of Drain Pipe ..................................................................................... 11 
4.4 Installation of Air Duct ........................................................................................................ 15 
4.5 Installation of Wired Controller .......................................................................................... 17 
5 Wire Connection ...................................................................................................... 17 
5.1 Connection of Wire and Wiring Board Terminal ................................................................. 18 
5.2 Power Cord Connection .................................................................................................... 19 
5.3 Connection of Communication Line of IDU and ODU ....................................................... 19 
5.4 Connection of Communication Line of Wired Controller .................................................... 20 
5.5 Instructions on Connecting Wired Controller and IDU Network ......................................... 21 
6 General Maintenance ............................................................................................... 23 
6.1 Cleaning of Air Filter .......................................................................................................... 23 
6.2 Maintenance Before Use-season ...................................................................................... 23 
6.3 Maintenance After Use-season ......................................................................................... 23 
7 Malfunction Codes of IDU ....................................................................................... 24 
8 Troubleshooting ....................................................................................................... 24