7.8  Electrical Wiring Work for Indoor Unit .............................................................................120 
8  INSTALLATION OF DRAINAGE PIPELINE ............................................................121 
8.1  Material Quality Requirements for Condensate Pipe ........................................................121 
8.2  Key Points for Condensate Pipe Installation......................................................................121 
9  Installation of Protective Layer on Connection Pipe....................................................125 
MAINTENANCE .................................................................................................... 127 
1  Testing Board Introduction .............................................................................................127 
1.1  Compose of Testing Board.................................................................................................127 
1.2  Instruction of Function and Data Section ..........................................................................127 
1.3  Process Control Setting......................................................................................................128 
2  Troubleshooting................................................................................................................ 130 
2.1  Check before Contacting Maintenance Serviceman ..........................................................131 
2.2  Problem Handling ..............................................................................................................131 
2.3  Error description ................................................................................................................132 
3  FLOW CHART OF TROUBLESHOOTING................................................................134 
3.1  Malfunction display: High Pressure Protection ................................................................. 135 
3.2  Malfunction display: Low Pressure Protection..................................................................135 
3.3  Malfunction display: Discharge temperature protection.................................................... 137 
3.4  Malfunction display: Current protection............................................................................ 137 
3.5  Malfunction display: Communication error.......................................................................138 
3.6  Malfunction display: Indoor unit water full protection......................................................139 
3.7  Malfunction display: Temperature sensor error.................................................................139 
3.8  Malfunction display: High/Low pressure sensor error ......................................................140 
4  POWER DISTRIBUTION..............................................................................................141 
4.1  Diagram of Power Distribution.......................................................................................... 141 
4.2  Wiring diagram ..................................................................................................................142 
5  THE RESISTANCES OF COMMON TEMPERATURE SENSORS.........................150 
5.1  15 KΩ.................................................................................................................................150 
5.2  20 KΩ.................................................................................................................................151 
5.3  50 KΩ.................................................................................................................................152 
6  DISASSEMBLY AND ASSEMBLY PROCEDURE OF MAIN PARTS ..................... 155 
6.1  Outdoor Unit ......................................................................................................................155 
6.2  Indoor unit..........................................................................................................................160 
7  EXPLODED VIEWS AND PART LIST ........................................................................173 
7.1  Outdoor unit .......................................................................................................................173 
7.2  Indoor unit..........................................................................................................................176 
7.3  BU Module.........................................................................................................................210