Daikin VRV IV+ Installer And User Reference Manual
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Daikin VRV IV+ Installer And User Reference Manual

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REYQ8U7Y1B
REYQ10U7Y1B
REYQ12U7Y1B
REYQ14U7Y1B
REYQ16U7Y1B
REYQ18U7Y1B
REYQ20U7Y1B
REMQ5U7Y1B
Installer and user reference guide
VRV IV+ heat recovery

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  • Page 1 Installer and user reference guide VRV IV+ heat recovery REYQ8U7Y1B REYQ10U7Y1B REYQ12U7Y1B REYQ14U7Y1B REYQ16U7Y1B REYQ18U7Y1B REYQ20U7Y1B REMQ5U7Y1B...

  • 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 ............................... 2.1.3 Refrigerant — in case of R410A or R32......................2.1.4 Electrical .................................
  • Page 3 14 Technical data 14.1 Information requirements for Eco Design........................48 For the installer 15 About the box 15.1 About LOOP BY DAIKIN ..............................50 15.2 Overview: About the box ..............................50 15.3 To unpack the outdoor unit............................51 15.4 To remove the accessories from the outdoor unit ......................52 15.5...
  • Page 4 Table of contents 18.2.4 To route the refrigerant piping ........................84 18.2.5 To connect the refrigerant piping to the outdoor unit ................. 85 18.2.6 To connect the multi connection piping kit ....................86 18.2.7 To connect the refrigerant branching kit....................... 86 18.2.8 To protect against contamination........................
  • Page 5 Table of contents 21.7 Operating the unit................................149 22 Hand-over to the user 23 Maintenance and service 23.1 Maintenance safety precautions............................ 151 23.1.1 To prevent electrical hazards ......................... 151 23.2 About service mode operation............................152 23.2.1 To use vacuum mode ............................. 152 23.2.2 To recover refrigerant ............................

  • 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 About the documentation 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. DANGER: RISK OF EXPLOSION Indicates a situation that could result in explosion. WARNING Indicates a situation that could result in death or serious injury.

  • Page 8: 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 9: 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. NOTICE Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress.
  • Page 10 General safety precautions WARNING During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit). WARNING Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately.

  • Page 11: 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 12 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 13 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 14: 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 15 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 16 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 17: For The User

    For the user REYQ8~20+REMQ5U7Y1B Installer and user reference guide VRV IV+ heat recovery 4P561154-1A – 2020.10...

  • Page 18: 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 Children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge can only use this appliance if...

  • Page 19: 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 authorized installer and must comply with applicable legislation.
  • Page 20 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 21 User safety instructions WARNING ▪ Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electric shock or fire. Contact your dealer. ▪ In case of accidental refrigerant leaks, make sure there are no naked flames.

  • Page 22: About The System

    About the system 5 About the system The indoor unit part of VRV IV heat recovery system can be used for heating/ cooling applications. The type of indoor unit which can be used depends on the outdoor units series. NOTICE For future modifications or expansions of your system: A full overview of allowable combinations (for future system extensions) is available in technical engineering data and should be consulted.
  • Page 23 About the system a Outdoor unit b Refrigerant piping c Branch selector unit (BS*) d Multi branch selector unit (BS*) e VRV DX indoor unit f Low temperature (LT) Hydrobox unit g Cooling only VRV indoor unit h High temperature (HT) Hydrobox unit i EKEXV kit j Air handling unit (AHU) k User interface...

  • 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: Before Operation

    Before operation 7 Before operation 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. NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work.

  • Page 26: Operation

    Operation 8 Operation In this chapter Operation range..................................Operating the system ................................8.2.1 About operating the system ..........................8.2.2 About cooling, heating, fan only, and automatic operation ................. 8.2.3 About the heating operation ..........................8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch) ..........8.2.5 To operate the system (WITH cool/heat changeover remote control switch).............

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

    Operation 8.2.2 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 INFORMATION ▪ The heating capacity drops when the outside temperature falls. If this happens, use another heating device together with the unit. (When using together with appliances that produce open fire, ventilate the room constantly). Do not place appliances that produce open fire in places exposed to the air flow from the unit or under the unit.

  • Page 29: Using The Dry Program

    Operation Cooling operation Heating operation Fan only operation 2 Press the ON/OFF button on the user interface. Result: The operation lamp lights up and the system starts operating. To stop 3 Press the ON/OFF button on the user interface once again. Result: The operation lamp goes out and the system stops operating.

  • Page 30: To Use The Dry Program (With Cool/Heat Changeover Remote Control Switch)

    Operation To stop 4 Press the ON/OFF button on the user interface once again. Result: The operation lamp goes out and the system stops operating. NOTICE Do not turn off power immediately after the unit stops, but wait for at least 5 minutes.

  • Page 31: Setting The Master User Interface

    Operation Ceiling suspended units Wall-mounted units For the following conditions, a micro computer controls the air flow direction which may be different from the display. Cooling Heating ▪ When the room temperature is lower ▪ When starting operation. than the set temperature. ▪...

  • Page 32: To Designate The Master User Interface (Vrv Dx And Hydrobox)

    Operation When the system is installed as shown in the figure above, it is necessary to – for each subsystem – designate one of the user interfaces as the master user interface. The displays of slave user interfaces show (change-over under centralised control) and slave user interfaces automatically follow the operation mode directed by the master user interface.

  • Page 33: Energy Saving And Optimum Operation

    Energy saving and optimum operation 9 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 34: 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 35: Maintenance And Service

    Maintenance and service 10 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 36: Maintenance Before A Long Stop Period

    Maintenance and service ▪ Turn on the power at least 6 hours before operating the unit in order to ensure smoother operation. As soon as the power is turned on, the user interface display appears. 10.2 Maintenance before a long stop period E.g., at the end of the season.

  • Page 37: Recommended Maintenance And Inspection

    Maintenance and service ▪ If repairs to the product are necessary within the warranty period, contact your dealer and keep the warranty card at hand. 10.4.2 Recommended maintenance and inspection Since dust collects when using the unit for several years, performance of the unit will deteriorate to some extent.

  • Page 38: 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 39: Troubleshooting

    Troubleshooting 11 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, electric shock or fire.

  • Page 40: Error Codes: Overview

    Troubleshooting Malfunction Measure The system operates but ▪ Check if air inlet or outlet of outdoor or indoor cooling or heating is unit is not blocked by obstacles. Remove any insufficient. obstacles and make sure the air can flow freely. ▪...
  • Page 41 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 42 Troubleshooting Main code Contents Liquid temperature sensor (after subcool HE) malfunction (outdoor) Liquid temperature sensor (coil) malfunction (outdoor) Gas temperature sensor (after subcool HE) malfunction (outdoor) High pressure sensor malfunction (S1NPH) Low pressure sensor malfunction (S1NPL) INV PCB abnormal Fin temperature abnormal Inverter PCB faulty Compressor over current detected Compressor lock (startup)

  • Page 43: Symptoms That Are Not System Malfunctions

    Troubleshooting 11.2 Symptoms that are NOT system malfunctions The following symptoms are NOT system malfunctions: 11.2.1 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.

  • Page 44: Symptom: White Mist Comes Out Of A Unit (Indoor Unit)

    Troubleshooting 11.2.6 Symptom: White mist comes out of a unit (Indoor unit) ▪ When humidity is high during cooling operation. If the interior of an indoor unit is extremely contaminated, the temperature distribution inside a room becomes uneven. It is necessary to clean the interior of the indoor unit. Ask your dealer for details on cleaning the unit.

  • Page 45: Symptom: Dust Comes Out Of The Unit

    Troubleshooting 11.2.12 Symptom: Dust comes out of the unit When the unit is used for the first time in a long time. This is because dust has gotten into the unit. 11.2.13 Symptom: The units can give off odours The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it again.

  • Page 46: Relocation

    Relocation 12 Relocation Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise. REYQ8~20+REMQ5U7Y1B Installer and user reference guide VRV IV+ heat recovery 4P561154-1A – 2020.10...

  • Page 47: Disposal

    Disposal 13 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 48: Technical Data

    Follow the steps below to consult the Energy Label – Lot 21 data of the unit and outdoor/indoor combinations. 1 Open the following webpage: https://energylabel.daikin.eu/ 2 To continue, choose: ▪ "Continue to Europe" for the international website. ▪ "Other country" for a country related site.

  • Page 49: For The Installer

    For the installer REYQ8~20+REMQ5U7Y1B Installer and user reference guide VRV IV+ heat recovery 4P561154-1A – 2020.10...

  • Page 50: About The Box

    To remove the transportation stay (only for 18+20 HP) ....................... 15.1 About LOOP BY DAIKIN is part of Daikin's wider commitment to reduce our environmental footprint. With we want to create a circular economy for refrigerants. One of the actions to achieve this, is the reuse of reclaimed refrigerant in VRV units produced and sold in Europe.

  • Page 51: To Unpack The Outdoor Unit

    About the box a Packaging material b Belt sling c Opening d Protector NOTICE Use a belt sling of ≤20 mm wide that adequately bears the weight of the unit. ▪ A forklift can only be used for transport as long as the unit remains on its pallet as shown above.

  • Page 52: To Remove The Accessories From The Outdoor Unit

    About the box 15.4 To remove the accessories from the outdoor unit 5~12 HP 14~20 HP Make sure that all accessories are available in the unit. 1× 1× 1× 1× 1× REQUEST FOR THE INDICATION OF INSTALLATION INFORMATION REQUEST FOR THE INDICATION OF ADDITIONAL REFRIGERANT CHARGING AND LEAK DETECTION OPERATION RESULT BE SURE TO FILL OUT THE BLANKS, WHICH ARE NEEDED FOR AFTER-SALE SERVICES.

  • Page 53: To Remove The Transportation Stay (Only For 14+16 Hp)

    About the box Accessory pipes (mm) Øa Øb Liquid pipe ▪ Front connection ID Øb ID Øa 12.7 12.7 ▪ Bottom connection ID Øb ID Øa 15.9 High pressure/low pressure gas 19.1 15.9 pipe ▪ Front connection 19.1 ID Øa ID Øb 22.2 ▪...

  • Page 54: To Remove The Transportation Stay (Only For 18+20 Hp)

    About the box 15.7 To remove the transportation stay (only for 18+20 HP) The transportation stays for protecting the unit during transport must be removed. Proceed as shown in the figure and procedure below. NOTICE If the unit is operated with the transportation stay attached, abnormal vibration or noise may be generated.

  • Page 55: About The Units And Options

    About the units and options 16 About the units and options In this chapter 16.1 Overview: About the units and options ..........................16.2 Identification label: Outdoor unit............................16.3 About the outdoor unit ................................16.4 System layout..................................16.5 Combining units and options..............................16.5.1 About combining units and options........................

  • Page 56: About The Outdoor Unit

    About the units and options Code Explanation Model series Power supply European market Minor model change indication 16.3 About the outdoor unit This installation manual concerns the VRV IV, full inverter driven, heat recovery system. Model line up: Model Description REYQ8~20 Heat recovery model for single or multi-use REMQ5...

  • Page 57: Combining Units And Options

    About the units and options a Outdoor unit b Refrigerant piping c Branch selector unit (BS*) d Multi branch selector unit (BS*) e VRV DX indoor unit f Low temperature (LT) Hydrobox unit g Cooling only VRV indoor unit h High temperature (HT) Hydrobox unit i EKEXV kit j Air handling unit (AHU) k User interface...

  • Page 58: Possible Combinations Of Indoor Units

    About the units and options For an overview which units are available you can consult the product catalogue for VRV IV. An overview is given indicating the allowed combinations of indoor units and outdoor units. Not all combinations are allowed. They are subject to rules (combination between outdoor-indoor, single outdoor unit use, multiple outdoor unit use, combinations between indoor units, etc.) mentioned in the technical engineering data.

  • Page 59: Possible Options For The Outdoor Unit

    About the units and options Continuous heating REYQ20 = REYQ8 + 12 REYQ22 = REYQ10 + 12 REYQ24 = REYQ8 + 16 REYQ26 = REYQ12 + 14 REYQ28 = REYQ12 + 16 REYQ30 = REYQ12 + 18 REYQ32 = REYQ16 + 16 REYQ34 = REYQ16 + 18 REYQ36 = REYQ16 + 20 REYQ38 = REYQ8 + 12 + 18...
  • Page 60 About the units and options Number of outdoor units Model name BHFQ23P1357 PC configurator cable (EKPCCAB*) For VRV IV heat recovery system it is also possible to make several commissioning field settings through a personal computer interface. For this option EKPCCAB* is required which is a dedicated cable to communicate with the outdoor unit.

  • Page 61: Unit Installation

    Unit installation 17 Unit installation In this chapter 17.1 Preparing the installation site ..............................17.1.1 Installation site requirements of the outdoor unit ....................17.1.2 Additional installation site requirements of the outdoor unit in cold climates ........... 17.1.3 Securing safety against refrigerant leaks....................... 17.2 Opening the unit..................................
  • Page 62 Unit installation (mm) a Personal computer or radio b Fuse c Earth leakage protector d User interface e Indoor unit f Outdoor 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 63: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates

    Unit installation ▪ Height of windbreaker≥1.5×height of outdoor unit ▪ Mind the service space requirements when installing the windbreaker. a Sea wind b Building c Outdoor unit d Windbreaker 17.1.2 Additional installation site requirements of the outdoor unit in cold climates NOTICE When operating the unit in a low outdoor ambient temperature, be sure to follow the instructions described below.

  • Page 64: Securing Safety Against Refrigerant Leaks

    Ambient outdoor temperature If the unit has to operate for 5 days in this area with high humidity (>90%), Daikin recommends to install the optional heater tape kit (EKBPH012TA or EKBPH020TA) to keep the drain holes free. 17.1.3 Securing safety against refrigerant leaks...
  • Page 65 Unit installation a Direction of the refrigerant flow b Room where refrigerant leak has occurred (outflow of all the refrigerant from the system) Pay special attention to places such as basements etc., where refrigerant can accumulate, since refrigerant is heavier than air. To check the maximum concentration level Check the maximum concentration level in accordance with steps 1 to 4 below and take whatever action is necessary to comply.

  • Page 66: Opening The Unit

    Unit installation When there is a room division that has an opening sufficiently large to permit free air flow. a Opening between the rooms. In case there is a door the openings above and below the door each must be equivalent in size to 0.15% or more of the floor area.

  • Page 67: To Open The Electrical Component Box Of The Outdoor Unit

    Unit installation 5~12 HP 14~20 HP 14× 14× Once the front plates open, the electrical component box can be accessed. See "To open the electrical component box of the outdoor unit" [  67]. For service purposes, the pushbuttons on the main PCB need to be accessed. To access these pushbuttons, the electrical component box cover does not need to be opened.

  • Page 68: Mounting The Outdoor Unit

    Unit installation e Moisture and dirt could enter NOT allowed Allowed 17.3 Mounting the outdoor unit 17.3.1 To provide the installation structure Make sure the unit is installed level on a sufficiently strong base to prevent vibration and noise. NOTICE ▪...
  • Page 69 Unit installation NOTICE ▪ Prepare a water drainage channel around the foundation to drain waste water from around the unit. During heating operation and when the outdoor temperatures are negative, the drained water from the outdoor unit will freeze up. If the water drainage is not taken care of, the area around the unit might be very slippery.

  • Page 70: Piping Installation

    Piping installation 18 Piping installation In this chapter 18.1 Preparing refrigerant piping ..............................18.1.1 Refrigerant piping requirements ........................... 18.1.2 Refrigerant piping insulation..........................18.1.3 To select the piping size ............................18.1.4 To select refrigerant branch kits..........................18.1.5 About the piping length ............................18.1.6 Single outdoor units and standard multi-outdoor-unit combinations >20 HP.............

  • Page 71: Refrigerant Piping Insulation

    Piping installation NOTICE The piping and other pressure-containing parts shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant. ▪ Only use phosphoric acid deoxidised seamless copper. ▪ Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/10 m.
  • Page 72 Piping installation A, B, C: Piping between outdoor unit and (first) refrigerant branch kit Choose from the following table in accordance with the outdoor unit total capacity type, connected downstream. Outdoor unit capacity Piping outer diameter size (mm) type (HP) Liquid pipe Suction gas pipe High pressure/ low pressure gas...
  • Page 73 Piping installation Indoor unit capacity index Piping outer diameter size (mm) Gas pipe Liquid pipe 63~140 15.9 19.1 22.2 ▪ If a size-up of the piping is required, refer to the table below. a Outdoor unit b Main pipes (increase size) c First refrigerant branch kit d Piping between refrigerant branch kit and indoor unit e Indoor unit...

  • Page 74: To Select Refrigerant Branch Kits

    Piping installation 18.1.4 To select refrigerant branch kits Refrigerant refnets For piping example, refer to "To select the piping size" [  71]. ▪ When using refnet joints at the first branch counted from the outdoor unit side, choose from the following table in accordance with the capacity of the outdoor unit (example: refnet joint a).

  • Page 75: About The Piping Length

    Piping installation 18.1.5 About the piping length Make sure the piping installation does not exceed the maximum allowable pipe length, the allowable level difference, and the allowable length after branching. To illustrate the piping length requirements, 6 cases are discussed in the chapters below.

  • Page 76: Single Outdoor Units And Standard Multi-Outdoor-Unit Combinations >20 Hp

    Piping installation Then The outdoor unit is positioned higher ▪ Minimum connection ratio: 80% than the indoor units ▪ Size up the liquid piping (refer to "To select the piping size" [  71] for more information) ▪ Activate the outdoor unit setting. Refer to the service manual for more information.
  • Page 77 Piping installation Pipe Maximum length (actual/equivalent) Longest pipe from the outdoor unit or 165 m/190 m the last multi-outdoor piping branch 120 m/165 m (1+2, 1+3, 1+5) Longest pipe after the first branch (2, 3, 40 m/— In case of a multi-outdoor setup: 10 m/13 m longest pipe from the outdoor unit to the last multi-outdoor piping branch (4) Total pipe length 1000 m/—...
  • Page 78 Piping installation d LT Hydrobox unit e HT Hydrobox unit Pipe Maximum length (actual/equivalent) Longest pipe from the outdoor unit or 135 m/160 m the last multi-outdoor piping branch (1+2, 1+3, 1+5) Longest pipe after the first branch (2, 3, 40 m In case of a multi-outdoor setup: 10 m/13 m longest pipe from the outdoor unit to the last multi-outdoor piping branch (4)

  • Page 79: Standard Multi-Outdoor-Unit Combinations ≤20 Hp And Free Multi-Outdoor-Unit Combinations

    Piping installation Pipe Maximum length (actual/equivalent) In case of a multi-outdoor setup: 10 m/13 m longest pipe from the outdoor unit to the last multi-outdoor piping branch (4) Total pipe length 1000 m/— (a) If the equivalent piping length is more than 90 m, size up the main liquid piping according to "To select the piping size" [...
  • Page 80 Piping installation (b) An extension up to 90 m is possible if all of the following conditions are met: In case of BS1Q units, the piping length between all indoor units and the nearest branch kit is ≤40 m. In case of multi BS units, the piping length between all indoor units and the multi BS unit is ≤40 m.

  • Page 81: Multiple Outdoor Units: Possible Layouts

    Piping installation (b) In this case, both are actual piping lengths: outdoor units ≤20 HP / outdoor units >20 HP. Connection with VRV DX indoor units and air handling units a Outdoor unit b VRV DX indoor unit c Multi BS unit d BS unit e EKEXV kit f AHU...
  • Page 82 Piping installation Pattern 1 Pattern 2 a To indoor unit b Piping between outdoor units NOT allowed (oil remains in piping) Allowed ▪ To avoid the risk of oil retention to the outmost outdoor unit, always connect the stop valve and the piping between outdoor units as shown in the 4 correct possibilities of the figure below.

  • Page 83: Connecting The Refrigerant Piping

    Piping installation Then >2 m >2 m >2 m ≤2 m ≤2 m a To indoor unit b Piping between outdoor units NOTICE There are restrictions on the refrigerant pipe connection order between outdoor units during installation in case of a multiple outdoor unit system. Install according to following restrictions.

  • Page 84: Multiple Outdoor Units: Knockout Holes

    Piping installation NOTICE Make sure the field piping and connections are NOT subjected to stress. WARNING During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit). WARNING Take sufficient precautions in case of refrigerant leakage.

  • Page 85: To Connect The Refrigerant Piping To The Outdoor Unit

    Piping installation a Left-side connection b Front connection c Right-side connection For side connections, the knockout hole on the bottom plate should be removed: a Large knockout hole b Drill c Points for drilling NOTICE Precautions when making knockout holes: ▪...

  • Page 86: To Connect The Multi Connection Piping Kit

    Piping installation NOTICE ▪ Be sure to use the supplied accessory pipes when carrying out piping work in the field. ▪ Be sure that the field installed piping does not touch other pipes, the bottom panel or side panel. Especially for the bottom and side connection, be sure to protect the piping with suitable insulation, to prevent it from coming into contact with the casing.

  • Page 87: To Protect Against Contamination

    Piping installation a Horizontal surface b Refnet joint mounted vertically c Refnet joint mounted horizontally 18.2.8 To protect against contamination Protect the piping as described in the following table to prevent dirt, liquid or dust from entering the piping. Unit Installation period Protection method Outdoor unit...

  • Page 88: To Braze The Pipe End

    Piping installation 18.2.9 To braze the pipe end NOTICE Precautions when connecting field piping. Add brazing material as shown in the figure. ≤Ø25.4 >Ø25.4 ▪ When brazing, blow through with nitrogen to prevent creation of large quantities of oxidised film on the inside of the piping. This film adversely affects valves and compressors in the refrigerating system and prevents proper operation.
  • Page 89 Piping installation a Service port and service port cover b Stop valve c Field piping connection d Dust cap a Service port b Dust cap c Hexagon hole d Shaft e Seal ▪ Do NOT apply excessive force to the stop valve. Doing so may break the valve body.
  • Page 90 Piping installation To close the stop valve 1 Remove the stop valve cover. 2 Insert a hexagon wrench into the stop valve and turn the stop valve clockwise. 3 When the stop valve cannot be turned any further, stop turning. 4 Install the stop valve cover.

  • Page 91: To Remove The Spun Pipes

    Piping installation 18.2.11 To remove the spun pipes WARNING Any gas or oil remaining inside the stop valve may blow off the spun piping. If these instructions are NOT followed correctly it may result in property damage or personal injury, which may be serious depending on the circumstances. Use the following procedure to remove the spun piping: 1 Make sure that the stop valves are fully closed.

  • Page 92: Checking The Refrigerant Piping

    Piping installation WARNING NEVER remove the spun piping by brazing. Any gas or oil remaining inside the stop valve may blow off the spun 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 93: Checking Refrigerant Piping: General Guidelines

    Piping installation NOTICE Make sure that all indoor units connected to the outdoor unit are powered on. NOTICE Wait to apply setting [2‑21] until the outdoor unit has finished the initialisation. Leak test and vacuum drying Checking the refrigerant piping involves: ▪...

  • Page 94: Checking Refrigerant Piping: Setup

    Piping installation 18.3.3 Checking refrigerant piping: Setup p < p > R410A a Pressure reducing valve b Nitrogen c Weighing scales d Refrigerant R410A tank (siphon system) e Vacuum pump f Liquid line stop valve g Gas line stop valve h High pressure/low pressure gas line stop valve A Valve A B Valve B...

  • Page 95: To Perform Vacuum Drying

    Piping installation 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. NEVER use soap water: ▪...

  • Page 96: Charging Refrigerant

    Piping installation ▪ 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. ▪ Reinforce the insulation on the refrigerant piping according to the installation environment.

  • Page 97: About Charging Refrigerant

    Piping installation NOTICE If operation is performed within 12 minutes after the indoor and outdoor units are powered on, the compressor will not operate before the communication is established in a correct way between outdoor unit(s) and indoor units. NOTICE Before starting charging procedures, check if the 7‑segment display indication of the outdoor unit A1P PCB is as normal (see "To access mode 1 or...

  • Page 98: To Determine The Additional Refrigerant Amount

    Piping installation 18.4.3 To determine the additional refrigerant amount INFORMATION For final charge adjustment in the test laboratory, please contact your local dealer. NOTICE The refrigerant charge of the system must be less than 100  kg. This means that in case the calculated total refrigerant charge is equal to or more than 95 kg you must divide your multiple outdoor system into smaller independent systems, each containing less than 95 ...
  • Page 99 Piping installation Inch piping Metric piping Piping Weight factor Piping Weight factor Ø6.4 mm 0.022 Ø6 mm 0.018 Ø9.5 mm 0.059 Ø10 mm 0.065 Ø12.7 mm 0.12 Ø12 mm 0.097 Ø15.9 mm 0.18 Ø15 mm 0.16 Ø16 mm 0.18 Ø19.1 mm 0.26 Ø18 mm 0.24 Ø22.2 mm 0.37 Ø22 mm 0.35 Connection ratio requirements. When selecting indoor units, the connection ratio must comply with the following requirements.

  • Page 100: To Charge Refrigerant: Flow Chart

    Piping installation 18.4.4 To charge refrigerant: Flow chart For more information, see "To charge refrigerant" [  102]. Pre-charging refrigerant Step 1 p < p > Calculate additional refrigerant charge amount: R (kg) Step 2+3 R410A • Close valves C, D and A •...
  • Page 101 Piping installation Charging refrigerant << Continuation of previous page R>Q Step 5 p < p > • Connect valve A to the refrigerant charge port (d) • Open all outdoor unit stop valves R410A Step 6 Proceed with automatic or manual charge Automatic charge Manual charge Step 6a...

  • Page 102: To Charge Refrigerant

    Piping installation << Continuation of previous page Heating charging Cooling charging ("t22" startup control) ("t02" startup control) ("t23" waiting for stable heating) ("t03" waiting for stable cooling) "t23" is flashing "t03" is flashing • Push BS2 within 5 minutes • Push BS2 within 5 minutes •...
  • Page 103 Piping installation Then The additional refrigerant amount is Perform steps 3~4. smaller than 10 kg The additional refrigerant charge is Perform steps 3~6. larger than 10 kg 3 Pre-charging can be done without compressor operation, by connecting the refrigerant bottle to the service port of the liquid stop valve (open valve B). Make sure that all outdoor unit stop valves, as well as valves A, C, and D are closed.

  • Page 104: Step 6A: To Automatically Charge Refrigerant

    Piping installation p < p > R410A a Weighing scales b Refrigerant R410A tank (siphon system) c Vacuum pump d Refrigerant charge port A Valve A INFORMATION For a multi outdoor unit system, it is not required to connect all charge ports to a refrigerant tank.
  • Page 105 Piping installation Depending on the ambient limitation conditions (see above), the unit will automatically decide which operation mode will be used to fulfill the automatic refrigerant charge: cooling or heating. If above conditions are fulfilled, cooling operation will be selected. If not, heating. Procedure 1 Idle (default) screen is shown.

  • Page 106: Step 6B: To Manually Charge Refrigerant

    Piping installation Cooling (middle 7‑segment display indicates " ") Automatic charging will continue, the 7‑segment display indication shows the current low pressure value and the status indication " " intermittent. If the 7‑segment display indication/user interface of indoor unit shows " " code, charging is almost finished.

  • Page 107: Error Codes When Charging Refrigerant

    Piping installation 6 Perform the test procedure as described in "21 Commissioning" [  145]. INFORMATION ▪ When a malfunction is detected during the procedure (e.g., in case of closed stop valve), a malfunction code will be displayed. In that case, refer to "Error codes when charging refrigerant" ...

  • Page 108: To Fix The Fluorinated Greenhouse Gases Label

    Piping installation NOTICE Make sure to open all stop valves after (pre-) charging the refrigerant. Operating with the stop valves closed will damage the compressor. 18.4.10 To fix the fluorinated greenhouse gases label 1 Fill in the label as follows: Contains fluorinated greenhouse gases RXXX GWP: XXX...

  • Page 109: Electrical Installation

    Electrical installation 19 Electrical installation In this chapter 19.1 About connecting the electrical wiring ..........................109 19.1.1 Precautions when connecting the electrical wiring ....................109 19.1.2 Field wiring: Overview............................111 19.1.3 About the electrical wiring............................. 111 19.1.4 Guidelines when knocking out knockout holes ..................... 112 19.1.5 About electrical compliance ..........................
  • Page 110 Electrical installation 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. Incomplete earthing may cause electrical shock. ▪...

  • Page 111: Field Wiring: Overview

    Electrical installation NOTICE Only applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method. If there exists the possibility of reversed phase after a momentary black out and the power goes on and off while the product is operating, attach a reversed phase protection circuit locally.

  • Page 112: Guidelines When Knocking Out Knockout Holes

    Electrical installation ▪ Be sure to follow the limits below. If the unit-to-unit cables are beyond these limits, it may result in malfunction of transmission: Maximum wiring length: 1000 m. Total wiring length: 2000 m. Maximum inter unit wiring length between outdoor units: 30 m. Transmission wiring to cool/heat selector: 500 m.

  • Page 113: About Electrical Compliance

    Electrical installation a Knockout hole b Burr c Remove burrs d If there are any possibilities that small animals enter the system through the knockout holes, close the holes with packing materials (to be prepared on-site) 19.1.5 About electrical compliance This equipment complies with: ▪...

  • Page 114: Safety Device Requirements

    Electrical installation Multiple outdoor units Model (Ω) Minimum S value (kVA) REYQ13 — 5786 REYQ16 — 5786 REYQ18 — 6846 REYQ20 — 7206 REYQ22 — 8266 REYQ24 — 8284 REYQ26 — 9165 REYQ28 — 9704 REYQ30 — 10602 REYQ32 — 10781 REYQ34 —...
  • Page 115 Electrical installation Single outdoor unit Model Minimum circuit Recommended fuses ampacity REMQ5 16.1 A 20 A REYQ8 16.1 A 20 A REYQ10 22.0 A 25 A REYQ12 24.0 A 32 A REYQ14 27.0 A 32 A REYQ16 31.0 A 40 A REYQ18 35.0 A 40 A REYQ20 39.0 A 50 A Multi outdoor units Model Minimum circuit Recommended fuses ampacity REYQ10...

  • Page 116: To Route And Fix The Transmission Wiring

    Electrical installation ▪ Transmission line section: 0.75~1.25 mm , maximum length is 1000 m. If the total transmission wiring exceeds these limits, it may result in communication error. For non-standard combinations Calculate the recommended fuse capacity. Formula Calculate, by adding the minimum circuit amps of each used unit (according to the table above), multiply the result by 1.1 and select the next higher recommended fuse capacity.

  • Page 117: To Connect The Transmission Wiring

    Electrical installation c Tie wrap. Fix to factory-mounted low voltage wiring. d Tie wrap. (a) Knockout hole has to be removed. Close the hole to avoid small animals or dirt from entering. 5~12 HP 14~20 HP Fix to the indicated plastic brackets using field supplied clamping material. a Wiring between the units (indoor-outdoor) (F1/F2 left) b Internal transmission wiring (Q1/Q2) c Plastic bracket...

  • Page 118: To Finish The Transmission Wiring

    Electrical installation j Cooling-only VRV indoor unit / Heating-only Hydrobox unit INFORMATION U-series units cannot share the same refrigerant circuit with T-series units. However, electrically, U-series units and T-series units can be connected via F1/F2. ▪ The interconnecting wiring between the outdoor units in the same piping system must be connected to the Q1/Q2 (Out Multi) terminals.

  • Page 119: To Connect The Power Supply

    Electrical installation 5~12 HP 14~20 HP a Power supply (possibility 1) b Power supply (possibility 2) c Power supply (possibility 3) . Use conduit. d Tie wrap (a) Knockout hole has to be removed. Close the hole to avoid small animals or dirt from entering.

  • Page 120: To Check The Insulation Resistance Of The Compressor

    Electrical installation NOTICE When connecting the earth wire, align the wire with the cut out section of the cup washer. Incomplete earthing may cause electrical shock. The power supply MUST be clamped to the plastic bracket using field supplied clamp material to prevent external force being applied to the terminal. The green and yellow striped wire MUST be used for earthing only.
  • Page 121 Electrical installation 1 Measure the insulation resistance over the poles. Then ≥1 MΩ Insulation resistance is OK. This procedure is finished. <1 MΩ Insulation resistance is not OK. Go to the next step. 2 Turn ON the power and leave it on for 6 hours. Result: The compressor will heat up and evaporate any refrigerant in the compressor.

  • Page 122: Configuration

    Configuration 20 Configuration In this chapter 20.1 Overview: Configuration................................. 122 20.2 Making field settings................................122 20.2.1 About making field settings ........................... 122 20.2.2 Field setting components............................123 20.2.3 To access the field setting components ........................ 124 20.2.4 To access mode 1 or 2............................124 20.2.5 To use mode 1................................

  • Page 123: Field Setting Components

    Configuration Push buttons Performing special actions (automatic refrigerant charge, test run, etc.) and making field settings (demand operation, low noise, etc.) happens by way of operating the push buttons. See also: ▪ "Field setting components" [  123] ▪ "To access the field setting components" [  124] PC configurator...

  • Page 124: To Access The Field Setting Components

    Configuration a 7‑segment displays b Push buttons 20.2.3 To access the field setting components It is not required to open the complete electronic component box to access the push buttons on the PCB and read out the 7‑segment display(s). To access you can remove the front inspection cover of the front plate (see figure). Now you can open the inspection cover of the electrical component box front plate (see figure).

  • Page 125: To Use Mode 1

    Configuration Stage Display When turning on the power supply: flashing as indicated. First checks on power supply are executed (1~2 min). When no trouble occurs: lighted as indicated (8~10 min). Ready for operation: blank display indication as indicated. 7‑segment display indications: Blinking In case of malfunction, the malfunction code is displayed on the indoor unit user interface and the outdoor unit 7‑segment display.

  • Page 126: To Use Mode 2

    Configuration Example: Checking the content of parameter [1‑10] (to know how many indoor units are connected to the system). [A‑B]=C in this case defined as: A=1; B=10; C=the value we want to know/monitor: 1 Make sure the 7‑segment display indication is in the default situation (normal operation).

  • Page 127: Mode 1: Monitoring Settings

    Configuration 1 Make sure the 7‑segment display indication is in the default situation (normal operation). 2 Push BS1 for over 5 seconds. Result: Mode 2 is accessed: 3 Push BS2 18 times. Result: Mode 2 setting 18 is addressed: 4 Push BS3 1 time; the value which is returned (depending on the actual field situation), is the status of the setting.
  • Page 128 Configuration ▪ The second method is to enable low noise operation based on an external input. For this operation an optional accessory is required. [1‑2] Shows the status of power consumption limitation operation. Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions.

  • Page 129: Mode 2: Field Settings

    Configuration When the latest malfunction codes were reset by accident on an indoor unit user interface, they can be checked again through this monitoring settings. For the content or reason behind the malfunction code see "24.1 Solving problems based on error codes" ...
  • Page 130 Configuration [2‑0] Description 0 (default) Each individual outdoor unit can select Cool/Heat operation (by Cool/Heat selector if installed), or by defining master indoor user interface (see setting [2‑83] and the operation manual). Master unit decides Cool/Heat operation when outdoor units are connected in multiple system combination Slave unit for Cool/Heat operation when outdoor units are connected in multiple system combination It is necessary to use the optional external control adaptor for outdoor unit...
  • Page 131 Configuration [2‑12] Description 0 (default) Deactivated. Activated. [2‑14] Input additional refrigerant amount that was charged. In case you want to use the automatic leak detection functionality, it is required to input the total additional refrigerant charge amount. [2‑14] Additional amount charged (kg) 0 (default) No input 0<x<5...
  • Page 132 Configuration In order to increase the static pressure the outdoor unit fan is delivering, this setting should be activated. For details about this setting, see technical specifications. [2‑18] Description 0 (default) Deactivated. Activated. [2‑20] Manual additional refrigerant charge. In order to add the additional refrigerant charge amount in a manual way (without automatic refrigerant charging functionality), following setting should be applied.
  • Page 133 Configuration [2‑22] Description Level 1 Level 3<Level 2<Level 1 Level 2 Level 3 [2‑25] Low noise operation level via the external control adaptor. If the system needs to be running under low noise operation conditions when an external signal is sent to the unit, this setting defines the level of low noise that will be applied.
  • Page 134 Configuration [2‑30] Power consumption limitation (approximately) 3 (default) [2‑31] Power consumption limitation level (step  2) via the external control adaptor (DTA104A61/62). 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 for step 2.
  • Page 135 Configuration [2‑45] Technical cooling. [2‑45] Description 0 (default) No technical cooling available Technical cooling available For more information about this setting, refer to the service manual. [2‑47] target temperature during heat recovery operation. [2‑47] target (°C) 0 (default) Auto [2‑49] Height difference setting.
  • Page 136 Configuration [2‑82] Heating comfort setting. This setting is used in conjunction with setting [2‑9]. [2‑82] Heating comfort setting 1 (default) Mild Quick Powerful For more information and advice about the impact of these settings, see "20.3 Energy saving and optimum operation" [  137].

  • Page 137: To Connect The Pc Configurator To The Outdoor Unit

    Configuration 20.2.9 To connect the PC configurator to the outdoor unit X27A a PC b Cable (EKPCCAB*) c Outdoor unit main PCB 20.3 Energy saving and optimum operation This VRV IV heat recovery system is equipped with advanced energy saving functionality.

  • Page 138: Available Comfort Settings

    Configuration 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). Using this idea, the system automatically starts increasing its refrigerant temperature, automatically reducing the delivered capacity and increasing the system's efficiency.
  • Page 139 Configuration Powerful Overshoot (during heating operation) or undershoot (during cooling operation) is allowed compared to the requested refrigerant temperature, in order to achieve the required room temperature very fast. The overshoot is allowed from the start up moment. ▪ In case of cooling operation the evaporating temperature is allowed to go down to 3°C on temporary base depending on the situation.
  • Page 140 Configuration ▪ In case of heating operation the condense temperature is allowed to go up to 46°C on temporary base depending on the situation. ▪ When the request from the indoor units becomes more moderate, the system will eventually go to the steady state condition which is defined by the operation method above.

  • Page 141: Example: Automatic Mode During Cooling

    Configuration 20.3.3 Example: Automatic mode during cooling 100% 6°C 3°C 35°C A Actual load curve B Virtual load curve (initial capacity automatic mode) C Virtual target value (initial evaporation temperature value automatic mode) D Required evaporation temperature value E Load factor F Outside air temperature Evaporating temperature Quick...

  • Page 142: Example: Automatic Mode During Heating

    Configuration 20.3.4 Example: Automatic mode during heating 100% 49°C 46°C 2°C A Virtual load curve (default automatic mode peak capacity) B Load curve C Virtual target value (initial condensation temperature value automatic mode) D Design temperature E Load factor F Outside air temperature Condensing temperature Quick Powerful...

  • Page 143: Using The Leak Detection Function

    Configuration E Quick F Powerful 20.4 Using the leak detection function 20.4.1 About automatic leak detection The (automatic) leak detection function is not by default activated and can only start working when the additional refrigerant charge is inputted into the system's logic (see [2‑14]).
  • Page 144 Configuration Information codes: Code Description Unit is not prepared to execute leak detection operation (refer to requirements to be able to execute leak detection operation). Indoor unit is out of temperature range for leak detection operation. Outdoor unit is out of temperature range for leak detection operation.

  • Page 145: Commissioning

    21 Commissioning NOTICE General commissioning checklist. Next to the commissioning instructions in this chapter, a general commissioning checklist is also available on the Daikin Business Portal (authentication required). The general commissioning checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during the commissioning and hand-over to the user.

  • Page 146: Checklist Before Commissioning

    Commissioning CAUTION Do NOT insert fingers, rods or other objects into the air inlet or outlet. Do NOT remove the fan guard. When the fan is rotating at high speed, it will cause injury. NOTICE Test run is possible for ambient temperatures between –⁠ 2 0°C and 35°C. INFORMATION During the first running period of the unit, the required power may be higher than stated on the nameplate of the unit.

  • Page 147: About The Test Run

    Commissioning Internal wiring Visually check the electrical component box and the inside of the unit for loose connections or damaged electrical components. Pipe size and pipe insulation Be sure that correct pipe sizes are installed and that the insulation work is properly executed.

  • Page 148: To Perform A Test Run

    Commissioning INFORMATION ▪ It may take 10 minutes to achieve a uniform refrigerant state before the compressor starts. ▪ During the test operation, the refrigerant running sound or the magnetic sound of a solenoid valve may become loud and the display indication may change. These are not malfunctions.

  • Page 149: Correcting After Abnormal Completion Of The Test Run

    Commissioning Completion Description Abnormal completion Indication of malfunction code on the 7‑segment display. Refer to "21.6 Correcting after abnormal completion of the test run" [  149] to take actions for correcting the abnormality. When the test operation is fully completed, normal operation will be possible after 5 minutes. 21.6 Correcting after abnormal completion of the test run The test operation is only completed if there is no malfunction code displayed on the user interface or outdoor unit 7‑segment display.

  • Page 150: Hand-Over To The User

    Hand-over to the user 22 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 151: Maintenance And Service

    Maintenance and service 23 Maintenance and service NOTICE Maintenance MUST be done by an authorized 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 152: About Service Mode Operation

    Maintenance and service 5~12 HP 14~20 HP X6A (A6P) X5A (A3P) 3 Pull out junction connectors X1A, X2A for the fan motors in the outdoor unit before starting service operation on the inverter equipment. Be careful not to touch the live parts. (If a fan rotates due to strong wind, it may store electricity in the capacitor or in the main circuit and cause electric shock.) 4 After the service is finished, plug the junction connector back in.
  • Page 153 Maintenance and service DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leak in the refrigerant circuit: ▪ Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit.

  • Page 154: Troubleshooting

    Troubleshooting 24 Troubleshooting In this chapter 24.1 Solving problems based on error codes..........................154 24.2 Error codes: Overview ................................154 24.1 Solving problems based on error codes In case of a displayed malfunction code, perform correcting actions as explained in the malfunction code table.
  • Page 155 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Low pressure malfunction: ▪ Open stop valves. ▪ Stop valve closed ▪ Check refrigerant amount +recharge unit. ▪ Refrigerant shortage ▪ Check the user interface's ▪ Indoor unit malfunction display or transmission wiring between the outdoor unit and the indoor unit.
  • Page 156 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Discharge temperature sensor Check connection on PCB or malfunction (R21T): open actuator. circuit – main PCB (X19A) Discharge temperature sensor Check connection on PCB or malfunction (R21T): short actuator.
  • Page 157 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Upper heat exchanger – liquid - Check connection on PCB or temperature sensor (R4T ) - actuator. main PCB (X30A) Lower heat exchanger – liquid - Check connection on PCB or temperature sensor (R5T ) - actuator.
  • Page 158 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 INV1 unbalanced power supply Check if power supply is within voltage range. INV2 unbalanced power supply Check if power supply is within voltage range. Reversed power supply phase Correct phase order.
  • Page 159 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Connection malfunction over Check if other indoor units have indoor units or type mismatch malfunction and confirm indoor (R410A, R407C, Hydrobox, etc) unit mix is allowed. Connection malfunction over Check if other indoor units have indoor units or type mismatch malfunction and confirm indoor...
  • Page 160 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 — Unit is not prepared to execute Refer to requirements to be leak detection operation able to execute leak detection operation. — Indoor unit is out of Retry when ambient conditions temperature range for leak are satisfied.

  • Page 161: Disposal

    Disposal 25 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. REYQ8~20+REMQ5U7Y1B Installer and user reference guide VRV IV+ heat recovery...

  • Page 162: Technical Data

    Technical data 26 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 26.1...
  • Page 163 Technical data Layout A+B+C+D Possibility 1 Possibility 2 a≥10 mm a≥50 mm — b≥300 mm b≥100 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm f≥600 mm f≥500 mm a≥10 mm a≥50 mm b≥300 mm b≥100 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm a≥10 mm a≥50 mm — b≥500 mm b≥500 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm...

  • Page 164: Piping Diagram: Outdoor Unit

    Technical data 26.2 Piping diagram: Outdoor unit Piping diagram: 5~12 HP a Stop valve (liquid) b Service port c Stop valve (high pressure/low pressure) d Stop valve (gas) e Charge port REYQ8~20+REMQ5U7Y1B Installer and user reference guide VRV IV+ heat recovery 4P561154-1A –...
  • Page 165 Technical data Piping diagram: 14~20 HP a Stop valve (liquid) b Service port c Stop valve (high pressure/low pressure) d Stop valve (gas) e Charge port REYQ8~20+REMQ5U7Y1B Installer and user reference guide VRV IV+ heat recovery 4P561154-1A – 2020.10...

  • Page 166: Wiring Diagram: Outdoor Unit

    Technical data Charge port / Service port Stop valve Filter Check valve Pressure relief valve Thermistor Solenoid valve Heat sink (PCB) Capillary tube Expansion valve 4‑way valve Propeller fan High pressure switch Low pressure sensor High pressure sensor Oil separator Accumulator Heat exchanger Compressor...
  • Page 167 Technical data For connection wiring to indoor–outdoor transmission F1‑F2, outdoor‑outdoor transmission F1‑F2, outdoor‑multi transmission Q1‑Q2, refer to the installation manual. How to use BS1~BS3 switch, refer to the "Service Precaution" label on the electrical component box cover. When operating, do NOT short-circuit the protection devices (S1PH, S2PH (for 14~20 HP only)).
  • Page 168 Technical data C* (A3P) Capacitor DS1, DS2 (A1P) DIP switch E1HC Crankcase heater Drain pan heater (option) F1U, F2U (A1P) Fuse (T 3.15 A / 250 V) Field fuse F101U (A4P) Fuse F401U, F403U Fuse (A2P) F601U, (A3P) Fuse HAP (A*P) Pilot lamp (service monitor is green) K3R (A1P) Magnetic relay (Y11S) K6R (A1P)
  • Page 169 Technical data R13T Thermistor (receiver gas) R14T Thermistor (auto charge) R15T Thermistor (compressor body) R21T Thermistor (M1C discharge) S1NPH Pressure sensor (high) S1NPL Pressure sensor (low) S1PH Pressure switch (discharge) SEG1~SEG3 (A1P) 7-segment display Current sensor V1D (A3P) Diode V1R (A3P, A4P) Power module Connector Terminal block...
  • Page 170 Technical data DS1, DS2 (A1P) DIP switch E1HC Crankcase heater Drain pan heater (option) F1U, F2U (A1P) Fuse (T 3.15 A / 250 V) F1U (A8P) Fuse (T 3.15 A / 250 V) Field fuse F101U (A4P, A7P) Fuse F401U, F403U Fuse (A2P, A5P) F601U, (A3P, A6P) Fuse HAP (A*P) Pilot lamp (service monitor is green)
  • Page 171 Technical data R10T Thermistor (suction) R11T Thermistor (heat exchanger, de-icer) R12T Thermistor (suction compressor) R13T Thermistor (receiver gas) R14T Thermistor (auto charge) R15T (only 18+20 Thermistor (compressor body) R21T, R22T Thermistor (M1C, M2C discharge) S1NPH Pressure sensor (high) S1NPL Pressure sensor (low) S1PH, S2PH Pressure switch (discharge) SEG1~SEG3 (A1P)

  • Page 172: 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 176 4P561154-1A 2020.10 Verantwortung für Energie und Umwelt...

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