Kaisai KFU-09HRDN1-QRC8GW, Service Manual

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CONTENTS
1. Precaution .................................................................................................................................................... 3
1.1 Safety Precaution .......................................................................................................................... 3
1.2 Warning ......................................................................................................................................... 3
2. Function ........................................................................................................................................................ 7
3. Dimension .................................................................................................................................................... 8
3.1 Indoor Unit ..................................................................................................................................... 8
3.2 Outdoor Unit ................................................................................................................................ 10
4. Refrigerant Cycle Diagram ........................................................................................................................ 11
5. Wiring Diagram .......................................................................................................................................... 12
5.1 Indoor Unit ................................................................................................................................... 12
5.2 Outdoor Unit ................................................................................................................................ 15
6 Installation Details ...................................................................................................................................... 19
6.1 Wrench torque sheet for installation ........................................................................................... 19
6.2 Connecting the cables ................................................................................................................ 19
6.3 Pipe length and the elevation ..................................................................................................... 20
6.4 Installation for the first time ......................................................................................................... 21
6.5 Adding the refrigerant after running the system for many years ................................................ 24
6.6 Re-installation while the indoor unit need to be repaired ........................................................... 25
6.7 Re-installation while the outdoor unit need to be repaired ......................................................... 27
7. Operation Characteristics ......................................................................................................................... 31
8. Electronic function .................................................................................................................................... 32
8.1 Abbreviation ................................................................................................................................ 32
8.2 Display function ........................................................................................................................... 32
8.3 Main Protection ........................................................................................................................... 33
8.4 Operation Modes and Functions ................................................................................................. 36
9. Troubleshooting ......................................................................................................................................... 52
9.1 Indoor Unit Error Display ............................................................................................................. 52
9.2 Diagnosis and Solution ............................................................................................................... 53