Daikin RDXYQ5T8V1B Installer And User Manual
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Daikin RDXYQ5T8V1B Installer And User Manual

Heat pump for indoor installation
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RKXYQ5T8Y1B
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RKXYQ8T7Y1B
RDXYQ8T7V1B
Installer and user reference guide
VRV IV heat pump for indoor installation

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Summary of Contents for Daikin RDXYQ5T8V1B

  • Page 1 Installer and user reference guide VRV IV heat pump for indoor installation RKXYQ5T8Y1B RDXYQ5T8V1B RKXYQ8T7Y1B RDXYQ8T7V1B...

  • Page 2: Table Of Contents

    Table of Contents Table of Contents 1 About the documentation About this document ..............................Meaning of warnings and symbols..........................2 General safety precautions For the installer ................................2.1.1 General ................................2.1.2 Installation site ............................... 10 2.1.3 Refrigerant — in case of R410A or R32......................10 2.1.4 Electrical .................................
  • Page 3 Table of Contents 10.2.7 Symptom: White mist comes out of a unit (Indoor unit, heat exchanger unit)..........43 10.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes..43 10.2.9 Symptom: Noise of air conditioners (Indoor unit, heat exchanger unit) ............43 10.2.10 Symptom: Noise of air conditioners (Indoor unit, compressor unit, heat exchanger unit) ......
  • Page 4 Table of Contents 16.2.3 Pipe bending guidelines ..........................72 16.2.4 To braze the pipe end............................. 72 16.2.5 Using the stop valve and service port......................72 16.2.6 To remove the pinched pipes......................... 73 16.2.7 To connect the refrigerant piping to the compressor unit................75 16.2.8 To connect the refrigerant piping to the heat exchanger unit..............
  • Page 5 Table of Contents 22.2 Precautions when troubleshooting ..........................124 22.3 Solving problems based on error codes ......................... 124 22.3.1 Error codes: Overview ............................ 125 23 Disposal 24 Technical data 24.1 Piping diagram: Compressor unit and heat exchanger unit ..................132 24.2 Wiring diagram: Compressor unit ..........................

  • Page 6: About The Documentation

    The original documentation is written in English. All other languages are translations. Technical engineering data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of latest technical data is available on the Daikin Business Portal (authentication required).

  • Page 7: Meaning Of Warnings And Symbols

    About the documentation 1.2 Meaning of warnings and symbols DANGER Indicates a situation that results in death or serious injury. DANGER: RISK OF ELECTROCUTION Indicates a situation that could result in electrocution. DANGER: RISK OF BURNING/SCALDING Indicates a situation that could result in burning/scalding because of extreme hot or cold temperatures.
  • Page 8 About the documentation Symbol Explanation Indicates a table title or a reference to it. Example: " 1–3 Table title" means "Table 3 in chapter 1". RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1B –...

  • Page 9: General Safety Precautions

    Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation).

  • Page 10: Installation Site

    General safety precautions CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. In accordance with the applicable legislation, it might be necessary to provide a logbook with the product containing at least: information on maintenance, repair work, results of tests, stand-by periods,…...
  • Page 11 General safety precautions WARNING Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately. Possible risks: ▪ Excessive refrigerant concentrations in a closed room can lead to oxygen deficiency. ▪ Toxic gas might be produced if refrigerant gas comes into contact with fire. DANGER: RISK OF EXPLOSION Pump down –...

  • Page 12: Electrical

    General safety precautions Then A siphon tube is present Charge with the cylinder upright. (i.e., the cylinder is marked with "Liquid filling siphon attached") A siphon tube is NOT present Charge with the cylinder upside down. ▪ Open refrigerant cylinders slowly. ▪...
  • Page 13 General safety precautions WARNING ▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the applicable legislation. ▪ All field wiring MUST be performed in accordance with the wiring diagram supplied with the product. ▪ NEVER squeeze bundled cables and make sure they do NOT come in contact with the piping and sharp edges.
  • Page 14 General safety precautions WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit. NOTICE ONLY applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method.

  • Page 15: Specific Installer Safety Instructions

    Specific installer safety instructions 3 Specific installer safety instructions Always observe the following safety instructions and regulations. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation. CAUTION Appliance NOT accessible to the general public, install it in a secured area, protected from easy access.
  • Page 16 Specific installer safety instructions WARNING NEVER remove the spun piping by brazing. Any gas or oil remaining inside the stop valve may blow off the spun piping. WARNING ▪ ONLY use R410A as refrigerant. Other substances may cause explosions and accidents.
  • Page 17 Specific installer safety instructions CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections. ▪ When disconnecting the power supply: disconnect the current-carrying cables first, before separating the earth connection. ▪ The length of the conductors between the power supply stress relief and the terminal block itself MUST be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.

  • Page 18: For The User

    For the user RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1B – 2021.12...

  • Page 19: User Safety Instructions

    User safety instructions 4 User safety instructions Always observe the following safety instructions and regulations. In this chapter General....................................Instructions for safe operation............................... 4.1 General WARNING If you are NOT sure how to operate the unit, contact your installer. WARNING This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if...

  • Page 20: Instructions For Safe Operation

    User safety instructions ▪ Units are marked with the following symbol: This means that electrical and electronic products may NOT be mixed with unsorted household waste. Do NOT try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, of oil and of other parts MUST be done by an authorised installer and MUST comply with applicable legislation.
  • Page 21 User safety instructions CAUTION To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the system. WARNING This unit contains electrical and hot parts. WARNING Before operating the unit, be sure the installation has been carried out correctly by an installer.
  • Page 22 User safety instructions WARNING ▪ Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electrical shock or fire. Contact your dealer. ▪ In case of accidental refrigerant leaks, make sure there are no naked flames.

  • Page 23: About The System

    About the system 5 About the system The VRV IV heat pump for indoor installation can be used for heating/cooling applications. NOTICE Do NOT use the system for other purposes. In order to avoid any quality deterioration, do NOT use the unit for cooling precision instruments, food, plants, animals, or works of art.

  • Page 24: User Interface

    User interface 6 User interface CAUTION ▪ NEVER touch the internal parts of the controller. ▪ Do NOT remove the front panel. Some parts inside are dangerous to touch and appliance problems may happen. For checking and adjusting the internal parts, contact your dealer.

  • Page 25: Operation

    Operation 7 Operation In this chapter Before operation ..................................Operation range..................................Operating the system ................................7.3.1 About operating the system ..........................7.3.2 About cooling, heating, fan only, and automatic operation ................. 7.3.3 About the heating operation ..........................7.3.4 To operate the system (WITHOUT cool/heat changeover remote control switch) ..........7.3.5 To operate the system (WITH cool/heat changeover remote control switch).............

  • Page 26: Operation Range

    Operation NOTICE Be sure to turn ON the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. This operation manual is for the following systems with standard control. Before initiating operation, contact your dealer for the operation that corresponds to your system type and mark.

  • Page 27: About Cooling, Heating, Fan Only, And Automatic Operation

    Operation 7.3.2 About cooling, heating, fan only, and automatic operation ▪ Changeover cannot be made with a user interface whose display shows "change-over under centralised control" (refer to installation and operation manual of the user interface). ▪ When the display "change-over under centralised control"...

  • Page 28: To Operate The System (Without Cool/Heat Changeover Remote Control Switch)

    Operation 7.3.4 To operate the system (WITHOUT cool/heat changeover remote control switch) 1 Press the operation mode selector button on the user interface several times and select the operation mode of your choice. Cooling operation Heating operation Fan only operation 2 Press the ON/OFF button on the user interface.

  • Page 29: Using The Dry Program

    Operation To adjust For programming temperature, fan speed and air flow direction refer to the operation manual of the user interface. 7.4 Using the dry program 7.4.1 About the dry program ▪ The function of this program is to decrease the humidity in your room with minimal temperature decrease (minimal room cooling).

  • Page 30: Adjusting The Air Flow Direction

    Operation 3 Press the ON/OFF button of the user interface. Result: The operation lamp lights up and the system starts operating. 4 Press the air flow direction adjust button (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted). Refer to "7.5  Adjusting the air flow direction" [  30] for details.

  • Page 31: Setting The Master User Interface

    Operation WARNING NEVER touch the air outlet or the horizontal blades while the swing flap is in operation. Fingers may become caught or the unit may break down. NOTICE ▪ The movable limit of the flap is changeable. Contact your dealer for details. (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted).

  • Page 32: Energy Saving And Optimum Operation

    Energy saving and optimum operation 8 Energy saving and optimum operation Observe the following precautions to ensure the system operates properly. ▪ Adjust the air outlet properly and avoid direct air flow to room inhabitants. ▪ Adjust the room temperature properly for a comfortable environment. Avoid excessive heating or cooling.

  • Page 33: Available Comfort Settings

    Energy saving and optimum operation Automatic The refrigerant temperature is set depending on the outdoor ambient conditions. As such adjusting the refrigerant temperature to match the required load (which is also related to the outdoor ambient conditions). E.g., when your system is operating in cooling, you do not need as much cooling under low outdoor ambient temperatures (e.g., 25°C) as under high outdoor ambient temperatures (e.g., 35°C).

  • Page 34: Maintenance And Service

    Maintenance and service 9 Maintenance and service NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work. WARNING NEVER replace a fuse with a fuse of a wrong ampere ratings or other wires when a fuse blows out.

  • Page 35: Maintenance Before A Long Stop Period

    Maintenance and service 9.2 Maintenance before a long stop period E.g., at the end of the season. ▪ Let the indoor units run in fan only operation for about half a day in order to dry the interior of the units. Refer to "7.3.2 ...

  • Page 36: Recommended Maintenance And Inspection

    Maintenance and service 9.4.2 Recommended maintenance and inspection Since dust collects when using the unit for several years, performance of the unit will deteriorate to some extent. As taking apart and cleaning interiors of units requires technical expertise and in order to ensure the best possible maintenance of your units, we recommend to enter into a maintenance and inspection contract on top of normal maintenance activities.

  • Page 37: Shortened Maintenance And Replacement Cycles

    Maintenance and service NOTICE ▪ The table indicates main components. Refer to your maintenance and inspection contract for more details. ▪ The table indicates recommended intervals of maintenance cycles. However, in order to keep the unit operational as long as possible, maintenance work may be required sooner.

  • Page 38: Troubleshooting

    Troubleshooting 10 Troubleshooting If one of the following malfunctions occur, take the measures shown below and contact your dealer. WARNING Stop operation and shut OFF the power if anything unusual occurs (burning smells etc.). Leaving the unit running under such circumstances may cause breakage, electrical shock or fire.

  • Page 39: Error Codes: Overview

    Troubleshooting Malfunction Measure The system operates but ▪ Check if air inlet or outlet of heat exchanger unit cooling or heating is or indoor unit is not blocked by obstacles. Remove insufficient. any obstacle and make it well-ventilated. ▪ Check if the air filter is not clogged (refer to "Maintenance"...
  • Page 40 Troubleshooting Main code Contents External protection device was activated EEPROM failure (indoor) Drain system malfunction (indoor) Fan motor malfunction (indoor) Swing flap motor malfunction (indoor) Expansion valve malfunction (indoor) Drain malfunction (indoor unit) Filter dust chamber malfunction (indoor) Capacity setting malfunction (indoor) Transmission malfunction between main PCB and sub PCB (indoor) Heat exchanger thermistor malfunction (indoor;...

  • Page 41: Symptoms That Are Not System Malfunctions

    Troubleshooting Main code Contents De-icing temperature sensor malfunction (heat exchanger unit) Liquid temperature sensor (after subcool HE) malfunction (compressor unit) Gas temperature sensor (after subcool HE) malfunction (compressor unit) High pressure sensor malfunction (BIPH) Low pressure sensor malfunction (BIPL) INV PCB abnormal Fin temperature abnormal Inverter PCB faulty Compressor over current detected...

  • Page 42: Symptom: The System Does Not Operate

    Troubleshooting 10.2.1 Symptom: The system does not operate ▪ The air conditioner does not start immediately after the ON/OFF button on the user interface is pressed. If the operation lamp lights, the system is in normal condition. To prevent overloading of the compressor motor, the air conditioner starts 5 minutes after it is turned ON again in case it was turned OFF just before.

  • Page 43: Symptom: White Mist Comes Out Of A Unit (Indoor Unit, Heat Exchanger Unit)

    Troubleshooting 10.2.7 Symptom: White mist comes out of a unit (Indoor unit, heat exchanger unit) When the system is changed over to heating operation after defrost operation. Moisture generated by defrost becomes steam and is exhausted. 10.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes This is because the user interface is intercepting noise from electric appliances other than the air conditioner.

  • Page 44: Symptom: The Heat Exchanger Unit Fan Does Not Spin

    Troubleshooting 10.2.14 Symptom: The heat exchanger unit fan does not spin During operation. The speed of the fan is controlled in order to optimise product operation. 10.2.15 Symptom: The display shows "88" This is the case immediately after the main power supply switch is turned on and means that the user interface is in normal condition.

  • Page 45: Relocation

    Relocation 11 Relocation Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise. RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1B – 2021.12...

  • Page 46: Disposal

    Disposal 12 Disposal This unit uses hydrofluorocarbon. Contact your dealer when discarding this unit. NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery.

  • Page 47: For The Installer

    For the installer RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1B – 2021.12...

  • Page 48: About The Box

    About the box 13 About the box In this chapter 13.1 Overview: About the box................................ 13.2 Compressor unit ..................................13.2.1 To unpack the compressor unit ..........................13.2.2 To handle the compressor unit..........................13.2.3 To remove the accessories from the compressor unit ..................13.2.4 To remove the transportation stay........................

  • Page 49: To Handle The Compressor Unit

    About the box 13.2.2 To handle the compressor unit ▪ With packing. Use a forklift. ▪ Without packing. Carry the unit slowly as shown: 13.2.3 To remove the accessories from the compressor unit 1 Remove the accessories (part 1). 1× 1×...

  • Page 50: To Remove The Transportation Stay

    About the box Piping accessories for circuit 2 (to the indoor units) 5 HP 8 HP Ø15.9 mm Ø19.1 mm Liquid Ø9.5 mm Ø9.5 mm Piping adapter (Ø19.1→22.2 mm) that you need when connecting piping to the heat exchanger unit (only for 8 HP) 13.2.4 To remove the transportation stay Only for RKXYQ5.

  • Page 51: Heat Exchanger Unit

    About the box 13.3 Heat exchanger unit 13.3.1 To unpack the heat exchanger unit 13.3.2 To handle the heat exchanger unit NOTICE When removing the heat exchanger unit from the pallet, do NOT place the suction or discharge side of the unit on the floor. Possible consequence: Deformation of the suction or discharge opening.

  • Page 52: To Remove The Accessories From The Heat Exchanger Unit

    About the box 13.3.3 To remove the accessories from the heat exchanger unit 1× 1× 1× 1× 1× 1× 3× a Optional filter for debris b Heat exchanger unit installation manual c Sealing pad d Drain hose e Metal clamp f Screw (for shield of transmission wiring) (see "17.3 To connect the electrical wiring on the heat exchanger...

  • Page 53: About The Units And Options

    About the units and options 14 About the units and options In this chapter 14.1 Overview: About the units and options ..........................14.2 Identification................................... 14.2.1 Identification label: Compressor unit ........................14.2.2 Identification label: Heat exchanger unit ......................14.3 About the compressor unit and heat exchanger unit......................14.4 System layout..................................

  • Page 54: Identification Label: Heat Exchanger Unit

    About the units and options Code Explanation Single module Refrigerant R410A Capacity class VRV IV series Power supply European market Minor model change indication 14.2.2 Identification label: Heat exchanger unit Location Model identification Example: R D X Y Q 5 T8 V1 B [*] Code Explanation Outdoor air cooled...

  • Page 55: System Layout

    About the units and options Specification 5 HP 8 HP Maximum capacity Heating 16.0 kW 25.0 kW Cooling 14.0 kW 22.4 kW Outside ambient design Heating –20~15.5°C WB temperature Cooling –5~46°C DB Ambient design temperature of compressor unit 5~35°C DB and heat exchanger unit Maximum relative Heating humidity around the Cooling compressor unit and heat exchanger unit...

  • Page 56: About Combining Units And Options

    About the units and options 14.5.1 About combining units and options NOTICE To be sure your system setup (compressor unit+heat exchanger unit+indoor unit(s)) will work, you have to consult the latest technical engineering data for the VRV IV heat pump for indoor installation. The VRV IV heat pump for indoor installation can be combined with several types of indoor units and is intended for R410A use only.
  • Page 57 About the units and options For the selection of the optimal branching kit, please refer to "16.1.4  To select refrigerant branch kits" [  69]. External control adaptor (DTA104A61/62) To instruct specific operation with an external input coming from a central control the external control adaptor can be used.
  • Page 58 About the units and options A B C X66A 5 Connect the cable. X66A 6 Connect the cool/heat selector switch. Tightening torque X1M (A/B/C): 0.53~0.63 N•m A B C KRC19-26A A B C 7 Fix the cables with cable ties. 8 Turn ON the DIP switch (DS1‑1). 1 2 3 4 X66A 9 Reattach the service covers.
  • Page 59 About the units and options Filter for debris (delivered as accessory) ▪ When. Installation is optional. It is recommended in places where a lot of debris or dirt (example: leafs) can go into the suction ducting. ▪ Where. Install the filter in one of the following places: Suction opening of the heat exchanger unit Suction ducting (easier for maintenance) ▪...

  • Page 60: Unit Installation

    Unit installation 15 Unit installation In this chapter 15.1 Preparing the installation site ..............................15.1.1 Installation site requirements of the compressor unit ..................15.1.2 Installation site requirements of the heat exchanger unit..................15.2 Opening the unit..................................15.2.1 About opening the units ............................15.2.2 To open the compressor unit..........................
  • Page 61 Unit installation (mm) a Personal computer or radio b Fuse c Earth leakage protector d User interface e Indoor unit f Compressor unit g Heat exchanger unit ▪ In places with weak reception, keep distances of 3  m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines.

  • Page 62: Installation Site Requirements Of The Heat Exchanger Unit

    Unit installation 15.1.2 Installation site requirements of the heat exchanger unit The heat exchanger unit has the same installation site requirements as the compressor unit, and a few additional ones: ▪ Heat exchanger fins are sharp and injury is possible. Choose an installation location where there is no risk for injury (especially in areas where children play).

  • Page 63: Opening The Unit

    Unit installation 15.2 Opening the unit 15.2.1 About opening the units At certain times, you have to open the unit. Example: ▪ When connecting the refrigerant piping ▪ When connecting the electrical wiring ▪ When maintaining or servicing the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed.

  • Page 64: To Open The Switch Box Cover Of The Heat Exchanger Unit

    Unit installation 15.2.3 To open the switch box cover of the heat exchanger unit DANGER: RISK OF ELECTROCUTION 2× 15.3 Mounting the compressor unit 15.3.1 Precautions when mounting the compressor unit INFORMATION Also read the precautions and requirements in the following chapters: ▪...

  • Page 65: Mounting The Heat Exchanger Unit

    Unit installation a Anchor point (4×) INFORMATION The recommended height of the upper protruding part of the bolts is 20 mm. 15.4 Mounting the heat exchanger unit 15.4.1 Precautions when mounting the heat exchanger unit INFORMATION Also read the precautions and requirements in the following chapters: ▪...

  • Page 66: Piping Installation

    Piping installation 16 Piping installation In this chapter 16.1 Preparing refrigerant piping ..............................16.1.1 Refrigerant piping requirements ........................... 16.1.2 Refrigerant piping material ............................ 16.1.3 To select the piping size ............................16.1.4 To select refrigerant branch kits..........................16.1.5 Refrigerant piping length and height difference ....................16.2 Connecting the refrigerant piping............................

  • Page 67: Refrigerant Piping Material

    Piping installation ▪ Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/10 m. 16.1.2 Refrigerant piping material ▪ Piping material: Phosphoric acid deoxidised seamless copper. ▪ Piping temper grade and thickness: Outer diameter (Ø) Temper grade Thickness (t) Ø 6.4 mm (1/4") Annealed (O) ≥0.80 mm...
  • Page 68 Piping installation Compressor unit capacity Piping outer diameter size (mm) type Gas pipe Liquid pipe 5 HP 19.1 12.7 8 HP 22.2 B: Piping between compressor unit and first refrigerant branch kit Use the following diameters: Compressor unit capacity Piping outer diameter size (mm) type Gas pipe Liquid pipe...

  • Page 69: To Select Refrigerant Branch Kits

    Piping installation Indoor unit capacity index Piping outer diameter size (mm) Gas pipe Liquid pipe 63~140 15.9 19.1 22.2 16.1.4 To select refrigerant branch kits For piping example, refer to "16.1.3 To select the piping size" [  67]. Refnet joint at first branch (counting from the compressor unit) When using refnet joints at the first branch counted from the compressor unit side, choose from the following table in accordance with the capacity of the compressor unit.
  • Page 70 Piping installation b Compressor unit c Refrigerant branch kit VRV DX VRV DX indoor unit EKEXV Expansion valve kit AHU Air handling unit H1~H5 Height differences L1~L7 Piping lengths Minimum and maximum piping lengths Heat exchanger unit → Compressor L1≤30 m unit Actual piping length (equivalent L2+L3+L4≤70 m (90 m) piping length) L2+L5+L6≤70 m (90 m)

  • Page 71: Connecting The Refrigerant Piping

    Piping installation 16.2 Connecting the refrigerant piping 16.2.1 About connecting the refrigerant piping Before connecting the refrigerant piping Make sure the compressor unit, heat exchanger unit and indoor units are mounted. Typical workflow Connecting the refrigerant piping involves: ▪ Connecting the refrigerant piping to the compressor unit ▪...

  • Page 72: Pipe Bending Guidelines

    Piping installation 16.2.3 Pipe bending guidelines Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40 mm or larger). 16.2.4 To braze the pipe end NOTICE Precautions when connecting field piping. Add brazing material as shown in the figure.

  • Page 73: To Remove The Pinched Pipes

    Piping installation a Service port and service port cover b Stop valve c Field piping connection d Stop valve cover a Service port b Stop valve cover c Hexagon hole d Shaft e Valve seat ▪ Do NOT apply excessive force to the stop valve. Doing so may break the valve body.
  • Page 74 Piping installation 2 Connect the vacuuming/recovery unit through a manifold to the service port of all stop valves. You have to recover gas and oil from all 4 pinched pipes. Depending on your available tools, use method 1 (manifold with refrigerant line splitters required) or method 2.

  • Page 75: To Connect The Refrigerant Piping To The Compressor Unit

    Piping installation WARNING NEVER remove the pinched piping by brazing. Any gas or oil remaining inside the stop valve may blow off the pinched piping. 6 Wait until all oil has dripped out before continuing with the connection of the field piping in case the recovery was not complete.

  • Page 76: To Connect The Refrigerant Piping To The Heat Exchanger Unit

    Piping installation NOTICE Precautions when making knockout holes: ▪ Avoid damaging the casing. ▪ After making the knockout holes, we recommend you remove the burrs and paint the edges and areas around the edges using repair paint to prevent rusting. ▪...
  • Page 77 Piping installation 3 Put a wet cloth in front of the EPS to protect the drain pan. 4 Braze the liquid and gas piping. NOTICE Only for 8 HP. Piping adapter (Ø19.1→22.2  mm) (delivered as accessory in the compressor unit). Use the piping adapter to connect the field piping (Ø22.2  mm) to the gas piping connection of the heat exchanger unit (Ø19.1 mm).

  • Page 78: To Connect The Refrigerant Branching Kit

    Piping installation 16.2.9 To connect the refrigerant branching kit 16.3 Checking the refrigerant piping 16.3.1 About checking the refrigerant piping Refrigerant piping works are Finish piping work. finished? The indoor units, compressor Use procedure: unit and/or heat exchanger "Method 1: Before power ON unit were already powered (regular method)".

  • Page 79: Checking Refrigerant Piping: General Guidelines

    Piping installation If there is a possibility of moisture being present in the refrigerant piping (for example, water may have entered the piping), first carry out the vacuum drying procedure below until all moisture has been removed. All piping inside the unit has been factory tested for leaks. Only field installed refrigerant piping needs to be checked.

  • Page 80: To Perform A Leak Test

    Piping installation Manifold Connections Compressor unit 5 HP Circuit 1 and 2 together p < p > R410A Only circuit 1 RDXYQ 8 HP Only circuit 2 RDXYQ a Liquid line stop valve (circuit 1: to heat exchanger unit) b Gas line stop valve (circuit 1: to heat exchanger unit) c Gas line stop valve (circuit 2: to indoor units) d Liquid line stop valve (circuit 2: to indoor units) e Vacuum pump...

  • Page 81: To Perform Vacuum Drying

    Piping installation 2 Discharge all nitrogen gas. 3 Break the vacuum by pressurising with nitrogen gas to a minimum gauge pressure of 0.2  MPa (2  bar). Never set the gauge pressure higher than the maximum operation pressure of the unit, i.e. 4.0 MPa (40 bar). NOTICE ALWAYS use a recommended bubble test solution from your wholesaler.

  • Page 82: Charging Refrigerant

    Piping installation ▪ Be sure to insulate the liquid and gas piping (for all units). ▪ Use heat resistant polyethylene foam which can withstand a temperature of 70°C for liquid piping and polyethylene foam which can withstand a temperature of 120°C for gas piping.

  • Page 83: Precautions When Charging Refrigerant

    Piping installation 16.4.2 Precautions when charging refrigerant INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation WARNING ▪ ONLY use R410A as refrigerant. Other substances may cause explosions and accidents. ▪ R410A contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 2087.5.

  • Page 84: To Charge Refrigerant

    Piping installation Parameters A and B: Model RKXYQ5 3.1 kg RKXYQ8 2.6 kg Metric piping. When using metric piping, replace the weight factors in the formula by the ones from the following table: Inch piping Metric piping Piping Weight factor Piping Weight factor Ø6.4 mm 0.022 Ø6 mm...
  • Page 85 Piping installation Manifold Connections Compressor unit 5 HP Circuit 1 and 2 together p < p > R410A Only circuit 1 RDXYQ 8 HP Only circuit 2 RDXYQ a Liquid line stop valve (circuit 1: to heat exchanger unit) b Gas line stop valve (circuit 1: to heat exchanger unit) c Gas line stop valve (circuit 2: to indoor units) d Liquid line stop valve (circuit 2: to indoor units) e Vacuum pump...
  • Page 86 Piping installation Refrigerant bottle Connected to the service port for refrigerant charge. This charges to both circuits, and to the compressor unit's internal refrigerant piping. Stop valves Open Compressor Operates 5 Connect as shown. Make sure valve A is closed. p <...

  • Page 87: Error Codes When Charging Refrigerant

    Piping installation 11 Charge refrigerant until the remaining determined additional refrigerant amount is added, and then close valve A. 12 Press BS3 to stop the manual additional refrigerant charge mode. NOTICE Make sure to open all stop valves after (pre-) charging the refrigerant. Operating with the stop valves closed will damage the compressor.

  • Page 88: Electrical Installation

    Electrical installation 17 Electrical installation In this chapter 17.1 About connecting the electrical wiring ..........................17.1.1 Precautions when connecting the electrical wiring ....................17.1.2 Field wiring: Overview............................17.1.3 Guidelines when knocking out knockout holes ..................... 17.1.4 About electrical compliance ..........................17.1.5 Safety device requirements ...........................
  • Page 89 Electrical installation INFORMATION Also read the precautions and requirements in the "2  General safety precautions" [  9]. WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth.

  • Page 90: Field Wiring: Overview

    Electrical installation NOTICE ▪ The reversed phase protection detector of this product only functions when the product starts up. Consequently reversed phase detection is not performed during normal operation of the product. ▪ The reversed phase protection detector is designed to stop the product in the event of an abnormality when the product is started up.
  • Page 91 Electrical installation Branches Maximum number of branches for unit- to-unit cabling Transmission wiring Sheathed + shielded cable (2 wires) Vinyl cords 0.75~1.25 mm² (using shielded cable for the transmission wiring is mandatory for 5 HP, and optional for 8 HP) Maximum wiring length 300 m (= distance between compressor unit and furthest indoor unit)

  • Page 92: Guidelines When Knocking Out Knockout Holes

    Electrical installation 17.1.3 Guidelines when knocking out knockout holes NOTICE Precautions when making knockout holes: ▪ Avoid damaging the casing. ▪ After making the knockout holes, we recommend you remove the burrs and paint the edges and areas around the edges using repair paint to prevent rusting. ▪...

  • Page 93: To Connect The Electrical Wiring On The Compressor Unit

    Electrical installation Model Minimum circuit Recommended fuses ampacity RKXYQ5 13.5 A 16 A RKXYQ8 17.4 A 20 A ▪ Phase and frequency: 3N~ 50 Hz ▪ Voltage: 380-415 V Transmission wiring Transmission line section: Transmission wiring Sheathed + shielded cable (2 wires) Vinyl cords 0.75~1.25 mm² (using shielded cable for the transmission wiring is mandatory for 5 HP, and optional for 8 HP) Maximum wiring length...
  • Page 94 Electrical installation 5 HP 8 HP RKXYQ5 RDXYQ5 RKXYQ8 RDXYQ8 X1M (A1P) TO IN/D TO OUT/D TO IN/D TO OUT/D F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2...
  • Page 95 Electrical installation INFORMATION To make routing the wiring easier, you can turn the switch box horizontally by loosening the screw on the left side of the switch box. 1× 5 HP ≥50 mm L2 L3 N F1 F2 8 HP ≥50 mm a Transmission wiring b Power supply...

  • Page 96: To Connect The Electrical Wiring On The Heat Exchanger Unit

    Electrical installation 17.3 To connect the electrical wiring on the heat exchanger unit NOTICE ▪ Follow the wiring diagram (delivered with the unit, located at the inside of the service cover). ▪ Make sure the electrical wiring does NOT obstruct proper reattachment of the service cover.

  • Page 97: To Close The Compressor Unit

    Electrical installation c Power supply cable 4 Route the wiring through the frame, and fix the cables (power supply and transmission wiring) with cable ties. a Transmission wiring b Power supply c Cable tie 17.4 To close the compressor unit NOTICE When closing the cover, make sure that the tightening torque does NOT exceed 4.1 N•m.

  • Page 98: To Check The Insulation Resistance Of The Compressor

    Electrical installation 2× 17.6 To check the insulation resistance of the compressor NOTICE If, after installation, refrigerant accumulates in the compressor, the insulation resistance over the poles can drop, but if it is at least 1 MΩ, then the unit will not break down.

  • Page 99: Configuration

    Configuration 18 Configuration In this chapter 18.1 Overview: Configuration................................. 18.2 Making field settings................................18.2.1 About making field settings ........................... 18.2.2 To access the field setting components ........................ 100 18.2.3 Field setting components............................100 18.2.4 To access mode 1 or 2............................102 18.2.5 To use mode 1 (and default situation) ........................

  • Page 100: To Access The Field Setting Components

    Configuration Mode 1 and 2 Mode Description Mode 1 Mode 1 can be used to monitor the current situation of the compressor unit. Some field setting contents can be (monitoring settings) monitored as well. Mode 2 Mode 2 is used to change the field settings of the system.
  • Page 101 Configuration Model DIP switch 5 HP ▪ DS1‑1: COOL/HEAT selector (refer to the manual of the cool/heat selector switch). OFF=not installed=factory setting ▪ DS1‑2: NOT USED. DO NOT CHANGE THE FACTORY SETTING. 8 HP ▪ DS1‑1: COOL/HEAT selector (see "14.5.3  Possible options for the compressor unit and heat exchanger unit" [  56]).

  • Page 102: To Access Mode 1 Or 2

    Configuration Description H1P H2P H3P H4P H5P H6P H7P Default situation (H1P OFF) Mode 1 (H1P flashing) Mode 2 (H1P ON) Setting 8 (in mode 2) (H2P~H7P = binary 8) Value 4 (in mode 2) (H2P~H7P = binary 4) 18.2.4 To access mode 1 or 2 After the units are turned ON, the display goes to its default situation.

  • Page 103: To Use Mode 1 (And Default Situation)

    Configuration 5 HP 8 HP a Default situation (H1P OFF) b Mode 1 (H1P flashing) c Mode 2 (H1P ON) BS1 Press BS1. BS1 [5 s] Press BS1 for at least 5 s. INFORMATION If you get confused in the middle of the process, press BS1 to return to the default situation.

  • Page 104: To Use Mode 2

    Configuration Action Button/display BS2 [X×] Select setting 5. ("X×" depends on the setting that you want to select.) (= binary 5) BS3 [1×] Display the value of setting 5. (there are 8 units connected) (= binary 8) BS1 [1×] Quit mode 1. Example: 7‑segments display –...

  • Page 105: Mode 1 (And Default Situation): Monitoring Settings

    Configuration Action Button/display BS3 [1×] Select value 4 (= 8°C). a: Display the current value. BS2 [X×] b: Change to 4. ("X×" depends on BS3 [1×] the current value, and the value that you want to select.) BS3 [1×] c: Enter the value in the system. d: Confirm.
  • Page 106 Configuration Value / Description Shows the status of low noise operation. Unit is currently not operating under low noise restrictions. Unit is currently operating under low noise restrictions. Low noise operation reduces the sound generated by the unit compared to nominal operating conditions. Low noise operation can be set in mode 2.
  • Page 107 Configuration Setting ( Value / Description [1‑5] It can be convenient to check if the total number of units which are installed Shows the total number of connected (heat exchanger unit + indoor units) units (heat exchanger unit + indoor match the total number of units which units).
  • Page 108 Configuration Setting Value / Description [1‑2] Unit is currently not operating under power consumption limitations. Shows the status of power consumption Unit is currently operating under power limitation operation. consumption limitation. Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions.

  • Page 109: Mode 2: Field Settings

    Configuration Setting Value / Description [1‑41] For more information, see setting [2‑82]. Shows the current heating comfort setting. 18.2.8 Mode 2: Field settings In mode 2 you can make field settings to configure the system. The display and the settings differ depending on the model.
  • Page 110 Configuration Setting Value Description (8 HP) (5 HP) [2‑12] Deactivated. (default Enable the low noise function and/or (= binary 1) (default) power consumption limitation via external control adaptor (DTA104A61/62). Activated. If the system needs to be running under (= binary 2) low noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed.
  • Page 111 Configuration Setting Value Description (8 HP) (5 HP) [2‑21] Deactivated. (default Refrigerant recovery/vacuuming mode. (= binary 1) (default) In order to achieve a free pathway to Activated. reclaim refrigerant out of the system or to remove residual substances or to vacuum (= binary 2) To stop the refrigerant recovery/ the system it is necessary to apply a setting vacuuming mode, push BS1 (in case...
  • Page 112 Configuration Setting Value Description (8 HP) (5 HP) [2‑30] Power consumption limitation level — (step 1) via the external control adaptor (DTA104A61/62). (default (= binary 2) (default) If the system needs to be running under power consumption limitation conditions — when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied (= binary 4)

  • Page 113: To Connect The Pc Configurator To The Compressor Unit

    Configuration Setting Value Description (8 HP) (5 HP) [2‑82] (in case of 8 HP) (= binary [2‑42]) (in Mild case of 5 HP) (default (default) Heating comfort setting. Quick This setting is used in conjunction with setting [2‑9]. Powerful 18.2.9 To connect the PC configurator to the compressor unit 5 HP 8 HP X27A...

  • Page 114: Commissioning

    Commissioning 19 Commissioning In this chapter 19.1 Precautions when commissioning............................114 19.2 Checklist before commissioning............................. 114 19.3 Checklist during commissioning ............................. 116 19.3.1 About the test run..............................116 19.3.2 To perform a test run (7-LEDs display) ........................116 19.3.3 To perform a test run (7-segment display)......................117 19.3.4 Correcting after abnormal completion of the test run ..................
  • Page 115 Commissioning 2 Close the unit. 3 Power up the unit. You read the complete installation and operation instructions, as described in the installer and user reference guide. Installation Check that the unit is properly installed, to avoid abnormal noises and vibrations when starting up the unit.

  • Page 116: Checklist During Commissioning

    Commissioning Insulation and air leaks Make sure the unit is fully insulated and checked for air leaks. Possible consequence: Condensate water might drip. Drainage Make sure drainage flows smoothly. Possible consequence: Condensate water might drip. External static pressure Make sure the external static pressure is set. Possible consequence: Insufficient cooling or heating.

  • Page 117: To Perform A Test Run (7-Segment Display)

    Commissioning NOTICE Be sure to turn ON the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. 3 Make sure the default (idle) situation is existing (H1P is OFF); see "18.2.4 To access mode 1 or 2" ...

  • Page 118: Correcting After Abnormal Completion Of The Test Run

    Commissioning 3 Make sure the default (idle) situation is existing; see "18.2.4 To access mode 1 2"  [   102]. Push BS2 for 5 seconds or more. The unit will start test operation. Result: The test operation is automatically carried out, the compressor unit display will indicate "...
  • Page 119 Commissioning INFORMATION Refer to the installation manual of the indoor unit for detailed malfunction codes related to indoor units. RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1B – 2021.12...

  • Page 120: Hand-Over To The User

    Hand-over to the user 20 Hand-over to the user Once the test run is finished and the unit operates properly, please make sure the following is clear for the user: ▪ Make sure that the user has the printed documentation and ask him/her to keep it for future reference.

  • Page 121: Maintenance And Service

    Maintenance and service 21 Maintenance and service NOTICE Maintenance MUST be done by an authorised installer or service agent. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO equivalent.

  • Page 122: Checklist For Yearly Maintenance Of The Heat Exchanger Unit

    Maintenance and service 2 Measure the voltage between terminals on the terminal block for power supply with a tester and confirm that the power supply is shut off. In addition, measure points as shown in the figure, with a tester and confirm that the voltage of the capacitor in the main circuit is less than 50 V DC.

  • Page 123: To Recover Refrigerant

    Maintenance and service Model Result 8 HP When confirmed, the expansion valves (in the indoor unit, compressor unit and heat exchanger unit) will fully open. At that moment the 7‑segment display indication= and the user interface of all indoor units indicate TEST (test operation) and (external control) and the operation will be prohibited.

  • Page 124: Troubleshooting

    Troubleshooting 22 Troubleshooting In this chapter 22.1 Overview: Troubleshooting ..............................124 22.2 Precautions when troubleshooting............................124 22.3 Solving problems based on error codes..........................124 22.3.1 Error codes: Overview............................125 22.1 Overview: Troubleshooting Before troubleshooting Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.

  • Page 125: Error Codes: Overview

    Troubleshooting INFORMATION If a malfunction occurs: ▪ In case of 5 HP: The error code is displayed on the user interface of the indoor unit. ▪ In case of 8 HP: The error code is displayed on the compressor unit's 7‑segments display and on the user interface of the indoor unit. INFORMATION If a malfunction occurs, the error code is displayed on the outdoor unit's 7‑segments display and on the user interface of the indoor unit.
  • Page 126 Troubleshooting Main code Cause Solution ▪ The stop valves of the compressor unit are ▪ Open the stop valves on both the gas and left closed. liquid side. ▪ Insufficient refrigerant ▪ Check if the additional refrigerant charge has been finished correctly. Recalculate the required amount of refrigerant from the piping length and add an adequate amount of refrigerant.
  • Page 127 Troubleshooting Main code Cause Solution Malfunction code: System test run not yet Execute system test run. executed (system operation not possible) ▪ No power is supplied to the compressor unit. ▪ Check if all units are powered on. ▪ Transmission wiring malfunction ▪...
  • Page 128 Troubleshooting Main code Sub code Cause Solution Low pressure malfunction: ▪ Open stop valves. ▪ Stop valve closed ▪ Check refrigerant amount+recharge unit. ▪ Refrigerant shortage ▪ Check the user interface's display or ▪ Indoor unit malfunction transmission wiring between the outdoor unit and the indoor unit.
  • Page 129 Troubleshooting Main code Sub code Cause Solution Liquid temperature sensor (after Check connection on PCB or actuator. subcool HE) malfunction Compressor unit: (R5T) - A1P (X30A) Gas temperature sensor (after subcool Check connection on PCB or actuator. HE) malfunction Compressor unit: (R6T) - A1P (X30A) High pressure sensor malfunction Check connection on PCB or actuator.
  • Page 130 Troubleshooting Main code Sub code Cause Solution Warning: faulty wiring to Q1/Q2 Check Q1/Q2 wiring. Do NOT use Q1/ Malfunction code: faulty wiring to Q1/ Check Q1/Q2 wiring. Do NOT use Q1/ ▪ Too many indoor units are connected Check indoor unit amount and total to F1/F2 line capacity connected.

  • Page 131: Disposal

    Disposal 23 Disposal NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation...

  • Page 132: Technical Data

    Technical data 24 Technical data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of latest technical data is available on the Daikin Business Portal (authentication required). In this chapter 24.1...
  • Page 133 Technical data M1C Compressor M1F, M2F Fan motor R1T (A) Thermistor (air) R2T (A) Thermistor (gas) R3T (A) Thermistor (coil) R2T (B) Thermistor (discharge) R3T (B) Thermistor (suction accumulator) R4T (B) Thermistor (subcool heat exchanger gas) R5T (B) Thermistor (suction compressor) R7T (B) Thermistor (liquid) S1NPH High pressure sensor S1NPL Low pressure sensor...

  • Page 134: Wiring Diagram: Compressor Unit

    Technical data R3T (A) Thermistor (coil) R21T (B) Thermistor (discharge) R3T (B) Thermistor (suction accumulator) R5T (B) Thermistor (liquid) R6T (B) Thermistor (subcool heat exchanger gas) R7T (B) Thermistor (suction compressor) S1NPH High pressure sensor S1NPL Low pressure sensor S1PH High pressure switch Y1E, Y2E Electronic expansion valve Y1S Solenoid valve (4‑way valve) Heating...
  • Page 135 Technical data Motor (fan) Switching power supply (A2P) Q1DI Earth leakage circuit breaker (field supply) Resistor (A2P) Thermistor (discharge) Thermistor (suction accumulator) Thermistor (subcool heat exchanger gas) Thermistor (suction compressor) Thermistor (liquid) R10T Thermistor (fin) S1NPL Low pressure sensor S1NPH High pressure sensor S1PH High pressure switch...
  • Page 136 Technical data Capacitor (A3P) DIP switch (A1P) E1HC Crankcase heater Fuse (T 3.15 A / 250 V) (A1P) Field fuse F400U Fuse (T 6.3 A / 250 V) (A2P) F410U Fuse (T 40 A / 500 V) (A2P) F411U Fuse (T 40 A / 500 V) (A2P) F412U Fuse (T 40 A / 500 V) (A2P) Running LED (service monitor green) (A1P) Magnetic contactor (A3P)

  • Page 137: Wiring Diagram: Heat Exchanger Unit

    Technical data Connector Electronic expansion valve Solenoid valve (4‑way valve) Noise filter (ferrite core) Noise filter 24.3 Wiring diagram: Heat exchanger unit The wiring diagram is delivered with the unit, located at the inside of the switch box cover. Symbols: Main terminal Earth wiring Wire number 15...
  • Page 138 Technical data Diode module (A1P) Terminal strip (power supply) Terminal strip (transmission wiring) Connector Electronic expansion valve Noise filter (ferrite core) Noise filter (A1P) RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1B – 2021.12...

  • Page 139: Glossary

    Optional equipment Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation. Field supply Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation.
  • Page 140 4P499898-1B 2021.12 Verantwortung für Energie und Umwelt...

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