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4 | User safety instructions

Installer and user reference guide

26

RXYSA8~12AMY1B

VRV 5-S system air conditioner

4P752782-1A – 2024.02

CAUTION

Do NOT touch the heat exchanger fins. These fins are

sharp and could result in cutting injuries.

Table of Contents

Default Chapter2
- Table of Contents2
1 About this Document6
- Meaning of Warnings and Symbols6
2 General Safety Precautions8
- For the Installer8
3 Specific Installer Safety Instructions14
- Instructions for Equipment Using R32 Refrigerant18
For the User20
4 User Safety Instructions21
- General21
- Instructions for Safe Operation22
5 About the System27
- System Layout28
6 User Interface29
7 Operation30
- Before Operation30
- Operation Range30
- Operating the System31
- Using the Dry Program33
- Adjusting the Air Flow Direction34
  - About the Air Flow Flap34
- Setting the Master User Interface35
  - About Setting the Master User Interface35
  - To Designate the Master User Interface36
- About Control Systems36
8 Energy Saving and Optimum Operation37
- Available Main Operation Methods38
- Available Comfort Settings38
9 Maintenance and Service39
- Precautions for Maintenance and Service39
- About the Refrigerant39
- After-Sales Service40
10 Troubleshooting42
- Error Codes: Overview43
- Symptoms that Are NOT System Malfunctions46
11 Relocation49
12 Disposal50
13 Technical Data51
- Eco Design Requirements51
For the Installer52
14 About the Box53
- To Unpack the Outdoor Unit53
- To Handle the Outdoor Unit54
- To Remove the Accessories from the Outdoor Unit55
- To Remove the Transportation Stay55
15 About the Units and Options57
- Identification Label: Outdoor Unit57
- About the Outdoor Unit57
- System Layout58
- Combining Units and Options58
16 Special Requirements for R32 Units61
- Installation Space Requirements61
- System Layout Requirements61
- To Determine the Required Safety Measures63
  - Overview: Flowchart67
- Safety Measures67
- Combinations of Safety Measures77
17 Unit Installation78
- Preparing the Installation Site78
  - Installation Site Requirements of the Outdoor Unit79
  - Additional Installation Site Requirements of the Outdoor Unit in Cold Climates82
- Opening and Closing the Unit83
- Mounting the Outdoor Unit84
18 Piping Installation87
- Preparing Refrigerant Piping87
- Connecting the Refrigerant Piping94
- Checking the Refrigerant Piping102
19 Charging Refrigerant108
- Precautions When Charging Refrigerant108
- About Charging Refrigerant109
- About the Refrigerant109
- To Determine the Additional Refrigerant Amount110
- To Charge Refrigerant112
- Error Codes When Charging Refrigerant114
- To Fix the Fluorinated Greenhouse Gases Label114
- To Check Refrigerant Piping Joints for Leaks after Charging Refrigerant115
20 Electrical Installation116
- About Connecting the Electrical Wiring116
- To Connect the Electrical Wiring to the Outdoor Unit124
- To Connect the External Outputs126
- To Connect the Cool/Heat Selector Switch Option127
- To Check the Insulation Resistance of the Compressor128
21 Configuration129
- Making Field Settings129
- Energy Saving and Optimum Operation140
22 Commissioning146
- Overview: Commissioning146
- Precautions When Commissioning146
- Checklist before Commissioning147
- Checklist During Commissioning148
- About the SV Unit Test Run149
- About the System Test Run149
  - To Perform a Test Run149
  - Correcting after Abnormal Completion of the Test Run150
- To Perform a Sv/Indoor Unit Connection Check151
- Operating the Unit153
23 Hand-Over to the User154
24 Maintenance and Service155
- Maintenance Safety Precautions155
  - To Prevent Electrical Hazards155
- Checklist for Yearly Maintenance of the Outdoor Unit156
- About Service Mode Operation156
- Unit Maintenance and Service Label157
25 Troubleshooting159
- Overview: Troubleshooting159
- Precautions When Troubleshooting159
- Solving Problems Based on Error Codes159
  - Error Codes: Overview160
- Refrigerant Leak Detection System165
26 Disposal168
27 Technical Data169
- Service Space: Outdoor Unit169
- Piping Diagram: Outdoor Unit171
- Wiring Diagram: Outdoor Unit172
28 Glossary175

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