Daikin VRV IV RKXYQ5T8Y1B User Manual

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Installer and user reference guide

VRV IV heat pump for indoor installation

RKXYQ5T8Y1B

RDXYQ5T8V1B

RKXYQ8T7Y1B

RDXYQ8T7V1B

Table of Contents

Default Chapter2
- Table of Contents2
1 About the Documentation6
- About this Document6
- Meaning of Warnings and Symbols7
2 General Safety Precautions9
- For the Installer9
3 Specific Installer Safety Instructions15
For the User18
4 User Safety Instructions19
- General19
- Instructions for Safe Operation20
5 About the System23
- System Layout23
6 User Interface24
7 Before Operation25
8 Operation26
- Operation Range26
- Operating the System26
- Using the Dry Program29
- Adjusting the Air Flow Direction30
  - About the Air Flow Flap30
- Setting the Master User Interface31
9 Energy Saving and Optimum Operation33
- Available Main Operation Methods33
- Available Comfort Settings34
10 Maintenance and Service35
- Maintenance after a Long Stop Period35
- Maintenance before a Long Stop Period36
- About the Refrigerant36
- After-Sales Service and Warranty36
11 Troubleshooting39
- Error Codes: Overview40
- Symptoms that Are NOT System Malfunctions42
12 Relocation46
13 Disposal47
For the Installer48
14 About the Box49
- About LOOP by DAIKIN49
- Overview: about the Box49
- Compressor Unit50
- Heat Exchanger Unit52
15 About the Units and Options54
- Overview: about the Units and Options54
- Identification54
  - Identification Label: Compressor Unit54
  - Identification Label: Heat Exchanger Unit55
- About the Compressor Unit and Heat Exchanger Unit55
- System Layout56
- Combining Units and Options56
16 Unit Installation61
- Preparing the Installation Site61
- Opening the Unit66
- Mounting the Compressor Unit67
  - Precautions When Mounting the Compressor Unit67
  - Guidelines When Installing the Compressor Unit67
- Mounting the Heat Exchanger Unit68
17 Piping Installation72
- Preparing Refrigerant Piping72
- Connecting the Refrigerant Piping77
- Checking the Refrigerant Piping85
- Charging Refrigerant89
18 Electrical Installation95
- About Connecting the Electrical Wiring95
- To Connect the Electrical Wiring on the Compressor Unit101
- To Connect the Electrical Wiring on the Heat Exchanger Unit103
- To Finish the Transmission Wiring104
- To Close the Compressor Unit105
- To Close the Heat Exchanger Unit105
- To Check the Insulation Resistance of the Compressor105
19 Configuration107
- Overview: Configuration107
- Making Field Settings107
- Energy Saving and Optimum Operation122
20 Commissioning129
- Overview: Commissioning129
- Precautions When Commissioning129
- Checklist before Commissioning130
- Checklist During Commissioning131
21 Hand-Over to the User135
22 Maintenance and Service136
- Overview: Maintenance and Service136
- Maintenance Safety Precautions136
  - To Prevent Electrical Hazards136
- Checklist for Yearly Maintenance of the Heat Exchanger Unit137
- About Service Mode Operation137
  - To Use Vacuum Mode137
  - To Recover Refrigerant138
23 Troubleshooting139
- Overview: Troubleshooting139
- Precautions When Troubleshooting139
- Solving Problems Based on Error Codes139
  - Error Codes: Overview140
24 Disposal146
25 Technical Data147
- Piping Diagram: Compressor Unit and Heat Exchanger Unit147
- Wiring Diagram: Compressor Unit149
- Wiring Diagram: Heat Exchanger Unit152
26 Glossary154

Questions and Answers:

M
Michael WatsonAug 12, 2025
Why is my Daikin Heat Pump not cooling or heating enough?
- J
  Joe GarnerAug 12, 2025
  If your Daikin Heat Pump system operates, but the cooling or heating is insufficient, verify that the air inlet or outlet of the heat exchanger unit or indoor unit isn't blocked by obstacles. Remove any obstacles to ensure proper ventilation. Also, check if the air filter is clogged. Verify the temperature and fan speed settings on your user interface. Ensure that doors and windows are closed to prevent drafts. Reduce the number of occupants in the room during cooling operation, minimize heat sources, and block direct sunlight with curtains or blinds. Finally, check that the airflow angle is properly adjusted.
R
Ryan AvilaAug 20, 2025
Why is my Daikin Heat Pump not turning on?
- J
  Jessica SpencerAug 20, 2025
  If your Daikin Heat Pump system doesn't operate at all, first check for a power failure and wait for the power to be restored. The system should restart automatically. Then, inspect the fuses and breakers. Replace any blown fuses or reset activated breakers.
N
Nicole ThomasSep 1, 2025
What to do if my Daikin Heat Pump only blows air?
- S
  sarahkingSep 1, 2025
  If your Daikin Heat Pump system goes into fan-only operation and stops when switching to heating or cooling, examine the air inlet and outlet of the heat exchanger unit or indoor unit for any obstructions. Remove any obstacles to ensure free airflow. Also, check if the user interface display indicates it's time to clean the air filter.

Daikin VRV IV RKXYQ5T8Y1B Specifications

General

Brand	Daikin
Model	VRV IV RKXYQ5T8Y1B
Category	Air Compressor
Language	English

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