4.5 Fixing and Damping of Unit ................................................................................................. 64
4.6 Outline Dimension and Position of Installation Hole ............................................................. 64
4.7 Installation Space Requirement ........................................................................................... 66
5 Pipeline Design of Refrigerant .................................................................................... 67
5.1 Notices for Pipeline Design ................................................................................................. 67
5.2 Allowable Length and Fall for Refrigerant Pipe In IDU and ODU ......................................... 68
5.3 Design of Oil Loop ............................................................................................................... 68
6 Installation of Drain Pipe ............................................................................................. 69
6.1 Installing the Drain Pipes ..................................................................................................... 69
6.2 Testing of Drain Piping ......................................................................................................... 71
7 Electrical Installation ................................................................................................... 71
DEBUGGING＆MAINTENANCE ...................................................................................... 72
1 Debugging .................................................................................................................... 73
1.1 Debugging Flow Chart ......................................................................................................... 73
1.2 Safety Notice ....................................................................................................................... 73
1.3 Preparation Before Debugging ............................................................................................ 73
1.4 Debugging Process ............................................................................................................. 76
1.5 Function Setting(UMD400PH/A-M(P)) ................................................................................. 80
2 Troubleshooting ........................................................................................................... 82
3 Wiring Diagram............................................................................................................ 115
4 Disassembly And Assembly Procedure Of Main Parts ............................................ 119
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