Daikin VRV IV Series - For the Installer

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For the installer

Installer and user reference guide

RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B

VRV IV heat pump for indoor installation

4P499898-1B – 2021.12

For the installer

Main Page

Table of Contents2
About the Documentation6
About this Document6
Meaning of Warnings and Symbols7
General Safety Precautions9
For the Installer9
General9
Installation Site10
Refrigerant - in Case of R410A or R3210
Electrical12
Specific Installer Safety Instructions15
For the User18
User Safety Instructions19
General19
Instructions for Safe Operation20
About the System23
System Layout23
User Interface24
Operation25
Before Operation25
Operation Range26
Operating the System26
About Operating the System26
About Cooling, Heating, Fan Only, and Automatic Operation27
About the Heating Operation27
To Operate the System (WITHOUT Cool/Heat Changeover Remote Control Switch)28
To Operate the System (with Cool/Heat Changeover Remote Control Switch)28
Using the Dry Program29
About the Dry Program29
To Use the Dry Program (WITHOUT Cool/Heat Changeover Remote Control Switch)29
To Use the Dry Program (with Cool/Heat Changeover Remote Control Switch)29
Adjusting the Air Flow Direction30
About the Air Flow Flap30
Setting the Master User Interface31
About Setting the Master User Interface31
To Designate the Master User Interface (VRV DX)31
Energy Saving and Optimum Operation32
Available Main Operation Methods32
Available Comfort Settings33
Maintenance and Service34
Maintenance after a Long Stop Period34
Maintenance before a Long Stop Period35
About the Refrigerant35
After-Sales Service and Warranty35
Warranty Period35
Recommended Maintenance and Inspection36
Recommended Maintenance and Inspection Cycles36
Shortened Maintenance and Replacement Cycles37
Troubleshooting38
Error Codes: Overview39
Symptoms that Are NOT System Malfunctions41
Symptom: the System Does Not Operate42
Symptom: Cool/Heat Cannot be Changed over42
Symptom: Fan Operation Is Possible, but Cooling and Heating Do Not Work42
Symptom: the Fan Speed Does Not Correspond to the Setting42
Symptom: the Fan Direction Does Not Correspond to the Setting42
Symptom: White Mist Comes out of a Unit (Indoor Unit)42
Symptom: White Mist Comes out of a Unit (Indoor Unit, Heat Exchanger Unit)43
Symptom: the User Interface Reads "U4" or "U5" and Stops, but then Restarts after a few Minutes43
Symptom: Noise of Air Conditioners (Indoor Unit, Heat Exchanger Unit)43
Symptom: Noise of Air Conditioners (Indoor Unit, Compressor Unit, Heat Exchanger Unit)43
Symptom: Noise of Air Conditioners (Compressor Unit, Heat Exchanger Unit)43
Symptom: Dust Comes out of the Heat Exchanger Unit43
Symptom: the Units Can Give off Odours43
Symptom: the Heat Exchanger Unit Fan Does Not Spin44
Symptom: the Display Shows "8844
Symptom: the Compressor in the Compressor Unit Does Not Stop after a Short Heating Operation44
Symptom: the Inside of an Compressor Unit Is Warm Even When the Unit Has Stopped44
Symptom: Hot Air Can be Felt When the Indoor Unit Is Stopped44
Relocation45
Disposal46
For the Installer47
About the Box48
Overview: about the Box48
Compressor Unit48
To Unpack the Compressor Unit48
To Handle the Compressor Unit49
To Remove the Accessories from the Compressor Unit49
To Remove the Transportation Stay50
To Remove the Transportation EPS50
Heat Exchanger Unit51
To Unpack the Heat Exchanger Unit51
To Handle the Heat Exchanger Unit51
To Remove the Accessories from the Heat Exchanger Unit52
To Remove the Transportation Sheet52
About the Units and Options53
Overview: about the Units and Options53
Identification53
Identification Label: Compressor Unit53
Identification Label: Heat Exchanger Unit54
About the Compressor Unit and Heat Exchanger Unit54
System Layout55
Combining Units and Options55
About Combining Units and Options56
Possible Combinations of Indoor Units56
Possible Options for the Compressor Unit and Heat Exchanger Unit56
Unit Installation60
Preparing the Installation Site60
Installation Site Requirements of the Compressor Unit60
Installation Site Requirements of the Heat Exchanger Unit62
Opening the Unit63
About Opening the Units63
To Open the Compressor Unit63
To Open the Switch Box Cover of the Heat Exchanger Unit64
Mounting the Compressor Unit64
Precautions When Mounting the Compressor Unit64
Guidelines When Installing the Compressor Unit64
Mounting the Heat Exchanger Unit65
Precautions When Mounting the Heat Exchanger Unit65
Guidelines When Installing the Heat Exchanger Unit65
Piping Installation66
Preparing Refrigerant Piping66
Refrigerant Piping Requirements66
Refrigerant Piping Material67
To Select the Piping Size67
To Select Refrigerant Branch Kits69
Refrigerant Piping Length and Height Difference69
Connecting the Refrigerant Piping71
About Connecting the Refrigerant Piping71
Precautions When Connecting the Refrigerant Piping71
Pipe Bending Guidelines72
To Braze the Pipe End72
Using the Stop Valve and Service Port72
To Remove the Pinched Pipes73
To Connect the Refrigerant Piping to the Compressor Unit75
To Connect the Refrigerant Piping to the Heat Exchanger Unit76
To Connect the Refrigerant Branching Kit78
Checking the Refrigerant Piping78
About Checking the Refrigerant Piping78
Checking Refrigerant Piping: General Guidelines79
Checking Refrigerant Piping: Setup79
To Perform a Leak Test80
To Perform Vacuum Drying81
To Insulate the Refrigerant Piping81
Charging Refrigerant82
About Charging Refrigerant82
Precautions When Charging Refrigerant83
To Determine the Additional Refrigerant Amount83
To Charge Refrigerant84
Error Codes When Charging Refrigerant87
To Fix the Fluorinated Greenhouse Gases Label87
Electrical Installation88
About Connecting the Electrical Wiring88
Precautions When Connecting the Electrical Wiring88
Field Wiring: Overview90
Guidelines When Knocking out Knockout Holes92
About Electrical Compliance92
Safety Device Requirements92
To Connect the Electrical Wiring on the Compressor Unit93
To Connect the Electrical Wiring on the Heat Exchanger Unit96
To Close the Compressor Unit97
To Close the Heat Exchanger Unit97
To Check the Insulation Resistance of the Compressor98
Configuration99
Overview: Configuration99
Making Field Settings99
About Making Field Settings99
To Access the Field Setting Components100
Field Setting Components100
To Access Mode 1 or 2102
To Use Mode 1 (and Default Situation)103
To Use Mode 2104
Mode 1 (and Default Situation): Monitoring Settings105
Mode 2: Field Settings109
To Connect the PC Configurator to the Compressor Unit113
Energy Saving and Optimum Operation113
Commissioning114
Precautions When Commissioning114
Checklist before Commissioning114
Checklist During Commissioning116
About the Test Run116
To Perform a Test Run (7-Leds Display)116
To Perform a Test Run (7-Segment Display)117
Correcting after Abnormal Completion of the Test Run118
Hand-Over to the User120
Maintenance and Service121
Overview: Maintenance and Service121
Maintenance Safety Precautions121
To Prevent Electrical Hazards121
Checklist for Yearly Maintenance of the Heat Exchanger Unit122
About Service Mode Operation122
To Use Vacuum Mode122
To Recover Refrigerant123
Troubleshooting124
Overview: Troubleshooting124
Precautions When Troubleshooting124
Solving Problems Based on Error Codes124
Error Codes: Overview125
Disposal131
Technical Data132
Piping Diagram: Compressor Unit and Heat Exchanger Unit132
Wiring Diagram: Compressor Unit134
Wiring Diagram: Heat Exchanger Unit137
Glossary139

Daikin VRV IV Series - For the Installer

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