Name: Daikin VRV IV+ RXYTQ8U7YF
Brand: Daikin
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6 | User interface

Installer and user reference guide

RXYTQ

VRV IV+ heat pump for high ambient temperatures

4P561157-1B – 2021.11

6 User interface

This operation manual offers a non-exhaustive overview of the main functions of

the system.

Table of Contents2
About the Documentation6
About this Document6
Meaning of Warnings and Symbols6
General Safety Precautions8
For the Installer8
General8
Installation Site9
Refrigerant - in Case of R410A or R329
Electrical11
Specific Installer Safety Instructions14
For the User17
User Safety Instructions18
General18
Instructions for Safe Operation19
About the System22
System Layout22
User Interface23
Operation24
Before Operation24
Operation Range25
Operating the System25
About Operating the System25
About Cooling, Heating, Fan Only, and Automatic Operation25
About the Heating Operation26
To Operate the System (WITHOUT Cool/Heat Changeover Remote Control Switch)26
To Operate the System (with Cool/Heat Changeover Remote Control Switch)27
Using the Dry Program27
About the Dry Program27
To Use the Dry Program (WITHOUT Cool/Heat Changeover Remote Control Switch)28
To Use the Dry Program (with Cool/Heat Changeover Remote Control Switch)28
Adjusting the Air Flow Direction29
About the Air Flow Flap29
Setting the Master User Interface30
About Setting the Master User Interface30
To Designate the Master User Interface (VRV DX and Hydrobox)30
About Control Systems30
Energy Saving and Optimum Operation31
Available Main Operation Methods31
Available Comfort Settings32
Maintenance and Service33
Maintenance after a Long Stop Period33
Maintenance before a Long Stop Period34
About the Refrigerant34
After-Sales Service and Warranty34
Warranty Period34
Recommended Maintenance and Inspection35
Recommended Maintenance and Inspection Cycles35
Shortened Maintenance and Replacement Cycles36
Troubleshooting37
Error Codes: Overview38
Symptoms that Are NOT System Malfunctions41
Symptom: the System Does Not Operate41
Symptom: Cool/Heat Cannot be Changed over41
Symptom: Fan Operation Is Possible, but Cooling and Heating Do Not Work41
Symptom: the Fan Speed Does Not Correspond to the Setting41
Symptom: the Fan Direction Does Not Correspond to the Setting41
Symptom: White Mist Comes out of a Unit (Indoor Unit)42
Symptom: White Mist Comes out of a Unit (Indoor Unit, Outdoor Unit)42
Symptom: the User Interface Reads "U4" or "U5" and Stops, but then Restarts after a few Minutes42
Symptom: Noise of Air Conditioners (Indoor Unit)42
Symptom: Noise of Air Conditioners (Indoor Unit, Outdoor Unit)42
Symptom: Noise of Air Conditioners (Outdoor Unit)42
Symptom: Dust Comes out of the Unit43
Symptom: the Units Can Give off Odours43
Symptom: the Outdoor Unit Fan Does Not Spin43
Symptom: the Display Shows "8843
Symptom: the Compressor in the Outdoor Unit Does Not Stop after a Short Heating Operation43
Symptom: the Inside of an Outdoor Unit Is Warm Even When the Unit Has Stopped43
Symptom: Hot Air Can be Felt When the Indoor Unit Is Stopped43
Relocation44
Disposal45
Technical Data46
Eco Design Requirements46
For the Installer47
About the Box48
About LOOP by DAIKIN48
Overview: about the Box48
To Unpack the Outdoor Unit49
To Remove the Accessories from the Outdoor Unit50
Accessory Pipes: Diameters50
To Remove the Transportation Stay50
About the Units and Options52
Overview: about the Units and Options52
Identification Label: Outdoor Unit52
About the Outdoor Unit53
System Layout53
Combining Units and Options54
About Combining Units and Options54
Possible Combinations of Indoor Units54
Possible Combinations of Outdoor Units54
Possible Options for the Outdoor Unit55
Unit Installation57
Opening the Unit57
About Opening the Units57
To Open the Outdoor Unit57
To Open the Electrical Component Box of the Outdoor Unit58
Mounting the Outdoor Unit58
To Provide the Installation Structure58
Piping Installation60
Preparing Refrigerant Piping60
Refrigerant Piping Requirements60
Refrigerant Piping Insulation61
To Select the Piping Size61
To Select Refrigerant Branch Kits63
About the Piping Length64
Piping Length: VRV DX Only65
Multiple Outdoor Units: Possible Layouts68
Connecting the Refrigerant Piping70
About Connecting the Refrigerant Piping70
Precautions When Connecting the Refrigerant Piping70
Multiple Outdoor Units: Knockout Holes71
To Route the Refrigerant Piping71
To Connect the Refrigerant Piping to the Outdoor Unit72
To Connect the Multi Connection Piping Kit73
To Connect the Refrigerant Branching Kit73
To Protect against Contamination74
To Braze the Pipe End74
Using the Stop Valve and Service Port75
To Remove the Spun Pipes77
Checking the Refrigerant Piping78
About Checking the Refrigerant Piping78
Checking Refrigerant Piping: General Guidelines79
Checking Refrigerant Piping: Setup80
To Perform a Leak Test80
To Perform Vacuum Drying81
To Insulate the Refrigerant Piping82
Charging Refrigerant82
Precautions When Charging Refrigerant82
About Charging Refrigerant83
To Determine the Additional Refrigerant Amount83
To Charge Refrigerant: Flow Chart85
To Charge Refrigerant86
Step 6: to Manually Charge Refrigerant88
Error Codes When Charging Refrigerant89
Checks after Charging Refrigerant89
Electrical Installation90
About Connecting the Electrical Wiring90
Precautions When Connecting the Electrical Wiring90
Field Wiring: Overview92
About the Electrical Wiring92
Guidelines When Knocking out Knockout Holes93
Safety Device Requirements93
To Route and Fix the Transmission Wiring94
To Connect the Transmission Wiring96
To Finish the Transmission Wiring97
To Route and Fix the Power Supply97
To Connect the Power Supply98
To Check the Insulation Resistance of the Compressor99
Configuration100
Overview: Configuration100
Making Field Settings100
About Making Field Settings100
Field Setting Components101
To Access the Field Setting Components101
To Access Mode 1 or 2102
To Use Mode 1103
To Use Mode 2104
Mode 1: Monitoring Settings105
Mode 2: Field Settings107
To Connect the PC Configurator to the Outdoor Unit111
Energy Saving and Optimum Operation111
Available Main Operation Methods112
Available Comfort Settings113
Example: Automatic Mode During Cooling115
Example: Automatic Mode During Heating116
Commissioning118
Overview: Commissioning118
Precautions When Commissioning118
Checklist before Commissioning119
About the Test Run120
To Perform a Test Run121
Correcting after Abnormal Completion of the Test Run122
Operating the Unit122
Hand-Over to the User123
Maintenance and Service124
Maintenance Safety Precautions124
To Prevent Electrical Hazards124
About Service Mode Operation125
To Use Vacuum Mode125
To Recover Refrigerant126
Troubleshooting127
Solving Problems Based on Error Codes127
Error Codes: Overview127
Disposal133
Technical Data134
Service Space: Outdoor Unit134
Piping Diagram: Outdoor Unit136
Wiring Diagram: Outdoor Unit137
Glossary143

Brand	Daikin
Model	VRV IV+ RXYTQ8U7YF
Category	Heat Pump
Language	English

Daikin VRV IV+ RXYTQ8U7YF User Manual

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