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Daikin VRV IV-S Installer And User Manual
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Daikin VRV IV-S Installer And User Manual

Daikin VRV IV-S Installer And User Manual

System air conditioner
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RXYSQ8TMY1B
RXYSQ10TMY1B
RXYSQ12TMY1B
Installer and user reference guide
VRV IV-S system air conditioner

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Summary of Contents for Daikin VRV IV-S

  • Page 1 Installer and user reference guide VRV IV-S system air conditioner RXYSQ8TMY1B RXYSQ10TMY1B RXYSQ12TMY1B...

  • Page 2: Table Of Contents

    To prevent the outdoor unit from falling over....................Connecting the refrigerant piping..........................6.4.1 About connecting the refrigerant piping ...................... 6.4.2 Precautions when connecting the refrigerant piping ................... 6.4.3 Pipe bending guidelines..........................Installer and user reference guide RXYSQ8~12TMY1B VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 3 11.1 Overview: Troubleshooting............................101 11.2 Precautions when troubleshooting..........................101 11.3 Solving problems based on error codes ........................101 11.3.1 Error codes: Overview ........................... 102 12 Disposal RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 4 19.2.16 Symptom: The inside of an outdoor unit is warm even when the unit has stopped........140 19.2.17 Symptom: Hot air can be felt when the indoor unit is stopped ..............140 20 Relocation 21 Disposal Installer and user reference guide RXYSQ8~12TMY1B VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 5 Table of contents 22 Glossary RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 6: General Safety Precautions

    Indicates a situation that could result in minor or moderate injury. NOTICE Indicates a situation that could result in equipment or property damage. INFORMATION Indicates useful tips or additional information. Symbols used on the unit: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 7: For The User

    ▪ Do NOT rinse the unit. ▪ Do NOT operate the unit with wet hands. ▪ Do NOT place any objects containing water on the unit. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 8: For The Installer

    WARNING 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 unless otherwise specified. RXYSQ8~12TMY1B...

  • Page 9: Installation Site

    General safety precautions WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible consequence: suffocation.

  • Page 10: Refrigerant - In Case Of R410A Or R32

    To avoid compressor breakdown, do NOT charge more than the specified amount of refrigerant. ▪ When the refrigerant system is to be opened, refrigerant MUST be treated according to the applicable legislation. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 11: Brine

    The selection of the brine MUST be in accordance with the applicable legislation. WARNING Take sufficient precautions in case of brine leakage. If brine leaks, ventilate the area immediately and contact your local dealer. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 12: Water

    If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 13 Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will damage the head and make proper tightening impossible. ▪ Over-tightening the terminal screws may break them. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 14 ON and OFF while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 15: About The Documentation

    A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of the latest technical data is available on the Daikin Business Portal (authentication required). RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C –...

  • Page 16: For The Installer

    For the installer RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 17: About The Box

    Fragile, handle the unit with care. Keep the unit upright in order to avoid compressor damage. 3.1 Outdoor unit 3.1.1 To unpack the outdoor unit 8 HP 1× RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 18: To Handle The Outdoor Unit

    Carry the unit slowly as shown: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 19: To Remove The Accessories From The Outdoor Unit

    3.1.4 To remove the transportation stay Only for RXYSQ10+12. NOTICE If the unit is operated with the transportation stay attached, abnormal vibration or noise may be generated. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 20 About the box 3 (12.3 N·m) 3 (12.3 N·m) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 21: About The Units And Options

    Outdoor air cooled Heat pump (no continuous heating) Single module S series Refrigerant R410A 8~12 Capacity class VRV IV series Power supply European market Minor model change indication RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 22: About The Outdoor Unit

    About the units and options 4.2 About the outdoor unit This installation manual concerns the VRV IV-S, full inverter driven, heat pump system. These units are intended for outdoor installation and aimed for air to air heat pump applications. Specification...

  • Page 23: About Combining Units And Options

    To be sure your system setup (outdoor unit+indoor unit(s)) will work, you have to consult the latest technical engineering data for the VRV heat pump. The VRV IV-S heat pump system can be combined with several types of indoor units and is intended for R410A use only.
  • Page 24 For this option EKPCCAB* is required which is a dedicated cable to communicate with the outdoor unit. The user interface software is available on http://www.daikineurope.com/support-and-manuals/software-downloads/. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 25: Preparation

    This is a class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 26 This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit. Install the outdoor unit away from direct sea winds. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 27 Turn the air outlet side towards the building's wall, fence or screen. a Make sure there is enough installation space Set the air outlet side at a right angle to the direction of the wind. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 28: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates

    Protect the outdoor unit against direct snowfall and take care that the outdoor unit is NEVER snowed up. a Snow cover or shed b Pedestal (minimum height = 150 mm) c Prevailing wind direction d Air outlet RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 29: Securing Safety Against Refrigerant Leaks

    If the unit is selected to operate at ambient temperatures lower than –5°C for 5 days or longer, with relative humidity levels exceeding 95%, we recommend to apply a Daikin range specifically designed for such application and/or to contact your dealer for further advice.
  • Page 30 (D), (E) as a single room or as the smallest room. When there are no smaller room divisions: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 31: Preparing Refrigerant Piping

    The piping and other pressure-containing parts shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant piping. INFORMATION Also read the precautions and requirements in the "1  General safety precautions" [  6]. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 32: Refrigerant Piping Material

    In case of RXYSQ10+12: The type of indoor units is detected automatically. VRV DX RA DX 1 Outdoor unit 2 Refrigerant branch kits 3-1~3-4 VRV DX indoor units 4 BP units RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 33 Indoor unit capacity index Piping outer diameter size (mm) Gas pipe Liquid pipe <150 15.9 150≤x<200 19.1 200≤x<290 22.2 290≤x<390 28.6 12.7 RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 34: To Select Refrigerant Branch Kits

    Example: Refnet joint B‑1→C‑1. Indoor unit capacity index Refrigerant branch kit <200 KHRQ22M20TA RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 35: Refrigerant Piping Length And Height Difference

    40 m ▪ Example 1.1, unit 8: b+c+d+e+f+g+p≤Limit ▪ Example 1.2, unit 6: b+h≤Limit ▪ Example 1.2, unit 8: i+k≤Limit ▪ Example 1.3, unit 8: i≤Limit ▪ Example 2, unit 18: b+m≤Limit RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 36 Assume equivalent piping length of refnet joint=0.5 m and refnet header=1 m (for calculation purposes of equivalent piping length, not for refrigerant charge calculations). Example 1 (VRV DX indoor units) Example 2 (RA DX indoor units) Example 1.1 Example 1.2 Example 1.3 RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 37 (A + [B, D]) Longest pipe after the first branch (B, D) 40 m/— Total pipe length 300 m/— The allowable minimum length is 5 m. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 38: Preparing Electrical Wiring

    Model Minimum circuit Recommended fuses ampacity RXYSQ8 18.5 A 25 A RXYSQ10 22 A 25 A RXYSQ12 24 A 32 A For all models: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 39 Total wiring length 600 m (= distance between outdoor and all indoors) If the total transmission wiring exceeds these limits, it may result in communication error. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 40: Installation

    Mounting the indoor units. ▪ Connecting the refrigerant piping. ▪ Checking the refrigerant piping. ▪ Charging refrigerant. ▪ Connecting the electrical wiring. ▪ Finishing the outdoor installation. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 41: Opening The Units

    Do NOT leave the unit unattended when the service cover is removed. 6.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING 8 HP 10+12 HP 2× 3× RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 42: Mounting The Outdoor Unit

    Prepare four sets of anchor bolts, nuts, and washers (field supply) as follows: 4× M12 [mm] a Make sure not to cover the drain holes of the bottom plate of the unit. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 43: To Install The Outdoor Unit

    150 mm under the outdoor unit. Drain holes (dimensions in mm) Model Bottom view (mm) RXYSQ8 RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 44: To Prevent The Outdoor Unit From Falling Over

    Connecting refrigerant branch kits ▪ Connecting the refrigerant piping to the indoor units (see the installation manual of the indoor units) ▪ Insulating the refrigerant piping RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 45: Precautions When Connecting The Refrigerant Piping

    Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40 mm or larger). 6.4.4 To braze the pipe end DANGER: RISK OF BURNING/SCALDING RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 46: Using The Stop Valve And Service Port

    ▪ The figures below show the name of each part required in handling the stop valve. a Service port and service port cover b Stop valve RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 47 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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 48: To Remove The Pinched Pipes

    1 Make sure that the stop valves are fully closed. 2 Connect the vacuuming/recovery unit through a manifold to the service port of all stop valves. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 49: To Connect The Refrigerant Piping To The Outdoor Unit

    1 Do the following: ▪ Remove the service cover. See "6.2.2 To open the outdoor unit" [  41]. ▪ Remove the piping intake plate (a) with screw (b). RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 50 3 Do the following: ▪ Connect the liquid pipe (a) to the liquid stop valve. (brazing) ▪ Connect the gas pipe (b) to the gas stop valve. (brazing) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 51 4 Reattach the service cover and the piping intake plate. 5 Seal all gaps (example: a) to prevent snow and small animals from entering the system. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 52: To Connect The Refrigerant Branching Kit

    Mount the refnet joint so that it branches either horizontally or vertically. ▪ Mount the refnet header so that it branches horizontally. a Horizontal surface b Refnet joint mounted vertically c Refnet joint mounted horizontally d Header RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 53: Checking The Refrigerant Piping

    Checking the refrigerant piping involves: ▪ Checking for any leakages in the refrigerant piping. ▪ Performing vacuum drying to remove all moisture, air or nitrogen in the refrigerant piping. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 54: Checking Refrigerant Piping: General Guidelines

    Liquid line stop valve g Gas line stop valve A Valve A B Valve B C Valve C Valve Status Valve A Open Valve B Open RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 55: To Perform A Leak Test

    Soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold. ▪ Soap water contains ammonia which may lead to corrosion of flared joints (between the brass flare nut and the copper flare). RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 56: To Perform Vacuum Drying

    See below figure. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 57: Charging Refrigerant

    If the power of some units is turned off, the charging procedure cannot be finished properly. NOTICE Turn ON the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 58: To Determine The Additional Refrigerant Amount

    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 0.018 RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 59: To Charge Refrigerant

    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 RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 60 6 Open all outdoor unit stop valves. At this point, valve A must remain closed! 7 Take all the precautions mentioned in "7  Configuration"  [   71] and "8 Commissioning" [  91] into account. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 61: Error Codes When Charging Refrigerant

    "11.3  Solving problems based on error codes" [  101]. 6.6.6 To fix the fluorinated greenhouse gases label 1 Fill in the label as follows: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 62: Connecting The Electrical Wiring

    If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 63 NOTICE NEVER remove a thermistor, sensor, etc., when connecting power wiring and transmission wiring. (If operated without thermistor, sensor, etc., the compressor may break down.) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 64 (sum of distances between outdoor and all indoor units) If the total interconnection wiring exceeds these limits, communication errors might occur. No secondary branchings are allowed after any transmission wire branching. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 65 ▪ When passing electrical wiring through the knockout holes, wrap the wiring with protective tape to prevent damage. a Knockout hole b Burr c Sealant etc. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 66 Installation method Single-core wire AA´ A´ Stranded conductor wire twisted to "solid-like" connection a Curled wire (single-core or twisted stranded conductor wire) b Screw c Flat washer RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 67: To Connect The Electrical Wiring To The Outdoor Unit

    2 Strip insulation (20 mm) from the wires. a Strip wire end to this point b An excessive strip length may cause electrical shock or leakage 3 Connect the transmission wiring as follows: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 68 5 Fix the cables (power supply and transmission wiring) with cable ties. 8 HP 10+12 HP (A1P) (A1P) a Cable tie b Attachment plate X1M Power supply RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 69 7 Reattach the service cover. See "6.8.2 To close the outdoor unit" [  70]. 8 Connect an earth leakage circuit breaker and fuse to the power supply line. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 70: Finishing The Outdoor Unit Installation

    6.8.2 To close the outdoor unit NOTICE When closing the outdoor unit cover, make sure that the tightening torque does NOT exceed 4.1 N•m. 8 HP 10+12 HP 2× 3× RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 71: Configuration

    Field settings are defined by their mode, setting and value. Example: [2‑8]=4. PC configurator For VRV IV-S heat pump system it is alternatively possible to make several commissioning field settings through a personal computer interface (for this, option EKPCCAB* is required). The installer can prepare the configuration (off-site) on PC and afterwards upload the configuration to the system.

  • Page 72: To Access The Field Setting Components

    Use the push buttons to make the field settings. Operate the push buttons with an insulated stick (such as a closed ball-point pen) to avoid touching live parts. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 73 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) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 74: To Access Mode 1 Or 2

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 75: To Use Mode 1

    Quit mode 1. Example: 7‑segments display – Mode 1 (in case of RXYSQ10+12) You can read out setting [1‑10] (= the total number of connected indoor units) as follows: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 76: To Use Mode 2

    Example: 7‑segments display – Mode 2 (in case of RXYSQ10+12) You can change the value of setting [2‑8] (= T target temperature during cooling operation) to 4 (= 8°C) as follows: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 77: Mode 1 (And Default Situation): Monitoring Settings

    ▪ The second method is to enable low noise operation based on an external input. For this operation an optional accessory is required. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 78 To obtain more detailed information about the malfunction code, press BS2 up to 3 times. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 79 For more information, see setting [2‑8]. Shows the current T target parameter position. [1‑6] For more information, see setting [2‑9]. Shows the current T target parameter position. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 80: Mode 2: Field Settings

    • In case of RXYSQ10+12: settings [2‑8], [2‑9], [2‑81] and [2‑82] Setting Value Description (= binary) [2‑8] Auto (default target temperature during cooling (= binary 3) (default) operation. 6°C 8°C 9°C 10°C 11°C RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 81 BS3, the unit will stop its operation after 30 minutes. If 30 minutes was not sufficient to add the needed refrigerant amount, the function can be reactivated by changing the field setting again. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 82 (= binary 4) [2‑27] 6h00 Low noise operation stop time. 7h00 This setting is used in conjunction with 8h00 setting [2‑22]. (default (= binary 4) (default) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 83 This setting is only applicable in case of RXYSQ8. In case of RXYSQ10+12, the type of indoor units is detected automatically. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 84: To Connect The Pc Configurator To The Outdoor Unit

    The intentional target, however, is fixed and will be used to obtain the best balance between energy consumption and comfort, depending on the application type. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 85: Available Main Operation Methods

    The selection method of indoor units is important and has to be considered as the available capacity is not the same as under basic operation. For details concerning to Hi-sensible applications, please contact your dealer. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 86: Available Comfort Settings

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 87 To activate this in… Change… Cooling operation [2‑81]=1 (in case of RXYSQ10+12). [2‑39]=1 (in case of RXYSQ8). This setting is used in conjunction with setting [2‑8]. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 88: Example: Automatic Mode During Cooling

    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 Powerful Mild RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 89: Example: Automatic Mode During Heating

    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 Mild RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 90 Configuration Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 91: Commissioning

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 92: Checklist Before Commissioning

    Visually check the switch 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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 93: Checklist During Commissioning

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 94: To Perform A Test Run (7-Leds Display)

    8.4.3 To perform a test run (7-segment display) Use this procedure in case of RXYSQ10+12. 1 Make sure all field settings you want are set; see "7.1  Making field settings" [  71]. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 95: Correcting After Abnormal Completion Of The Test Run

    Carry out the test operation again and confirm that the abnormality is properly corrected. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 96 7‑segments display and on the user interface of the indoor unit. INFORMATION Refer to the installation manual of the indoor unit for detailed malfunction codes related to indoor units. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 97: Hand-Over To The User

    Explain the user how to properly operate the system and what to do in case of problems. ▪ Show the user what to do for the maintenance of the unit. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 98: Maintenance And Service

    50  V  DC, discharge the capacitors in a safe manner by using a dedicated capacitor discharge pen to avoid possibility of sparking. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 99: Checklist For Yearly Maintenance Of The Outdoor Unit

    See installation manual of the indoor unit for more information about vacuuming and recovery. 10.3.1 To use vacuum mode 1 When the unit is at standstill, activate setting [2‑21] to start vacuuming mode. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 100: To Recover Refrigerant

    Use a separate recovery system so that the unit's compressor does NOT have to operate. NOTICE Make sure to NOT recover any oil while recovering refrigerant. Example: By using an oil separator. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 101: Troubleshooting

    In case of a displayed malfunction code, perform correcting actions as explained in the malfunction code table. After correcting the abnormality, press BS3 to reset the malfunction code and retry operation. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 102: Error Codes: Overview

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 103 Connect interconnections F1 and F2 of the connected BP unit correctly to the outdoor unit's PCB (TO BP UNIT). Make sure that the communication with the BP unit is enabled. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 104 Check refrigerant amount+recharge unit. ▪ Stop valve closed ▪ Open stop valves. Ambient temperature sensor Check connection on PCB or actuator. malfunction (R1T) - A1P (X18A) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 105 INV1 unbalanced power supply voltage Check if power supply is within range. Reversed power supply phase Correct phase order. malfunction Reversed power supply phase Correct phase order. malfunction RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 106 (by monitor mode) or wait till initialisation is finished. Stop valve closed or wrong (during Open stop valves. system test run) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 107: Disposal

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 108: Technical Data

    Technical data 13 Technical data A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of the latest technical data is available on the Daikin Business Portal (authentication required). In this chapter 13.1...

  • Page 109: Service Space: Outdoor Unit

    1 Seal the bottom of the installation frame to prevent discharged air from flowing back to the suction side through the bottom of the unit. 2 Maximum two units can be installed. Not allowed RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 110 (B2) Then it is not required to install a roof, but seal the gap between the upper and lower units to prevent discharged air from flowing back to the suction side through the bottom of the unit. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 111: Piping Diagram: Outdoor Unit

    Service port (refrigerant charge) Y1S Solenoid valve M1C Compressor Y3S Solenoid valve (4‑way valve) M1F-M2F Fan motor Heating R1T Thermistor (air) Cooling R2T Thermistor (suction 1) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 112 (subcool heat exchanger) m Service port (refrigerant charge) Y1S Solenoid valve (4‑way valve) M1C Compressor Y2S Solenoid valve M1F-M2F Fan motor Heating R1T Thermistor (air) Cooling RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 113: Wiring Diagram: Outdoor Unit

    When operating, do not short-circuit protective device S1PH. Colours (see below). Symbols: Live Neutral Field wiring Terminal strip Connector Fixed connector Movable connector Protective earth (screw) Noiseless earth Terminal Colours: Black Blue Brown RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 114 Motor (upper and lower fan) Switching power supply (A1P) (A3P) Q1RP Reverse phase protector R2, R3 Resistor Resistor (current sensor) (A4P) (A5P) Resistor (current limiting) Thermistor (air) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 115 Fuse (T 3.15 A / 250 V) (A1P) F101U Fuse (A4P) (A5P) F411U, F412U Fuse (A2P) F601U Fuse (A3P) Light-emitting diode (service monitor is green) (A1P) (A3P) (A4P) (A5P) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 116 X3A, X4A Connector (M2F) Terminal strip (power supply) Terminal strip (control) (A1P) Electronic expansion valve (main) Electronic expansion valve (subcool heat exchanger) Solenoid valve (4‑way valve) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 117 Technical data Solenoid valve Z1C~Z4C Noise filter (ferrite core) Noise filter (with surge absorber) (A2P) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 118: For The User

    For the user RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 119: About The System

    About the system 14 About the system The indoor unit part of this VRV IV-S heat pump system can be used for heating/ cooling applications. The type of indoor unit which can be used depends on the outdoor units series.

  • Page 120: System Layout

    INFORMATION The following figure is an example and may NOT completely match your system layout. a VRV IV-S Heat pump outdoor unit b Refrigerant piping c VRV direct expansion (DX) indoor unit d User interface (dedicated depending on indoor unit type)

  • Page 121: User Interface

    Detailed information on required actions to achieve certain functions can be found in the dedicated installation and operation manual of the indoor unit. Refer to the operation manual of the installed user interface. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 122: Operation

    Operation modes (depending on indoor unit type): ▪ Heating and cooling (air to air). ▪ Fan only operation (air to air). RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 123: Operation Range

    The fan may keep on running for about 1 minute after the heating operation stops. ▪ The air flow rate may adjust itself depending on the room temperature or the fan may stop immediately. This is not a malfunction. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 124: About The Heating 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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 125: Using The Dry Program

    ▪ 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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 126: Setting The Master User Interface

    INFORMATION The following figure is an example and may NOT completely match your system layout. a VRV IV-S Heat pump outdoor unit b Refrigerant piping c VRV direct expansion (DX) indoor unit d User interface (dedicated depending on indoor unit type)

  • Page 127: To Designate The Master User Interface (Vrv Dx)

    (changeover under centralised control). 16.6.3 To designate the master user interface (RA DX) In case only RA DX indoor units are connected to the VRV IV-S system: 1 Stop all indoor units. 2 When the system is not operating (all indoor units thermo OFF), you can define the master RA DX indoor unit by addressing that unit with infrared user...

  • Page 128: Energy Saving And Optimum Operation

    Detailed information is given for the installer in the installation manual. He can help you to realize the best balance between energy consumption and comfort. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 129: Available Main Operation Methods

    ▪ Powerful ▪ Quick ▪ Mild ▪ RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 130: Maintenance And Service

    Maintenance tips and procedures for cleaning are provided in the installation/operation manuals of dedicated indoor units. Make sure to install cleaned air filters back in the same position. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 131: Maintenance Before A Long Stop Period

    This product includes a warranty card that was filled in by the dealer at the time of installation. The completed card has to be checked by the customer and stored carefully. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 132: Recommended Maintenance And Inspection

    Normal use without frequent starting and stopping of the unit. Depending on the model, we recommend not starting and stopping the machine more than 6 times/hour. ▪ Operation of the unit is assumed to be 10 hours/day and 2,500 hours/year. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 133: Shortened Maintenance And Replacement Cycles

    Contact your dealer for details. INFORMATION Damage due to taking apart or cleaning interiors of units by anyone other than our authorised dealers may not be included in the warranty. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 134: Troubleshooting

    Check if the user interface display shows (time system stops. to clean the air filter). (Refer to "18  Maintenance service"  [   130] and "Maintenance" in the indoor unit manual.) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 135: Error Codes: Overview

    ON/OFF button. If not, ask your installer for advice. Main code Contents External protection device was activated RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 136 Pressure sensor malfunction Current sensor malfunction Discharge temperature sensor malfunction (outdoor) Heat exchanger gas temperature sensor malfunction (outdoor) Suction temperature sensor malfunction (outdoor) De-icing temperature sensor malfunction (outdoor) RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 137: Symptoms That Are Not System Malfunctions

    Malfunction in communication centralised control device - indoor unit Auto address malfunction (inconsistency) Auto address malfunction (inconsistency) 19.2 Symptoms that are NOT system malfunctions The following symptoms are NOT system malfunctions: RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 138: Symptom: The System Does Not Operate

    19.2.6 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit) When the system is changed over to heating operation after defrost operation. Moisture generated by defrost becomes steam and is exhausted. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 139: Symptom: The User Interface Reads "U4" Or "U5" And Stops, But Then Restarts After A Few Minutes

    The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it again. 19.2.13 Symptom: The outdoor unit fan does not spin During operation, the speed of the fan is controlled in order to optimise product operation. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 140: Symptom: The Display Shows "88

    19.2.17 Symptom: Hot air can be felt when the indoor unit is stopped Several different indoor units are being run on the same system. When another unit is running, some refrigerant will still flow through the unit. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 141: Relocation

    Relocation 20 Relocation Contact your dealer to remove and reinstall the entire unit. Moving units requires technical expertise. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...

  • Page 142: Disposal

    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. RXYSQ8~12TMY1B Installer and user reference guide VRV IV-S system air conditioner 4P404225-1C – 2024.03...
  • Page 143 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 144 4P404225-1C 2024.03...

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