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

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RYYQ8U7Y1B*
RYYQ10U7Y1B*
RYYQ12U7Y1B*
RYYQ14U7Y1B*
RYYQ16U7Y1B*
RYYQ18U7Y1B*
RYYQ20U7Y1B*
Installer and user reference guide
VRV IV+ heat pump
RYMQ8U7Y1B*
RYMQ10U7Y1B*
RYMQ12U7Y1B*
RYMQ14U7Y1B*
RYMQ16U7Y1B*
RYMQ18U7Y1B*
RYMQ20U7Y1B*
RXYQ8U7Y1B*
RXYQ10U7Y1B*
RXYQ12U7Y1B*
RXYQ14U7Y1B*
RXYQ16U7Y1B*
RXYQ18U7Y1B*
RXYQ20U7Y1B*

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Summary of Contents for Daikin VRV IV+

  • Page 1 Installer and user reference guide VRV IV+ heat pump RYYQ8U7Y1B* RYMQ8U7Y1B* RXYQ8U7Y1B* RYYQ10U7Y1B* RYMQ10U7Y1B* RXYQ10U7Y1B* RYYQ12U7Y1B* RYMQ12U7Y1B* RXYQ12U7Y1B* RYYQ14U7Y1B* RYMQ14U7Y1B* RXYQ14U7Y1B* RYYQ16U7Y1B* RYMQ16U7Y1B* RXYQ16U7Y1B* RYYQ18U7Y1B* RYMQ18U7Y1B* RXYQ18U7Y1B* RYYQ20U7Y1B* RYMQ20U7Y1B* RXYQ20U7Y1B*...

  • Page 2: Table Of Contents

    Table of contents Table of contents 1 General safety precautions About the documentation .............................. 1.1.1 Meaning of warnings and symbols ........................ For the user..................................For the installer ................................1.3.1 General ................................1.3.2 Installation site ............................... 1.3.3 Refrigerant..............................1.3.4 Brine................................11 1.3.5 Water ................................
  • Page 3 Table of contents 6.4.3 To route the refrigerant piping ........................52 6.4.4 To connect the refrigerant piping to the outdoor unit ................. 52 6.4.5 To connect the multi connection piping kit ....................53 6.4.6 Multiple outdoor units: Knockout holes ......................54 6.4.7 To connect the refrigerant branching kit.......................
  • Page 4 Table of contents Maintenance safety precautions............................ 113 9.2.1 To prevent electrical hazards ......................... 113 About service mode operation............................114 9.3.1 To use vacuum mode ............................. 114 9.3.2 To recover refrigerant ............................ 114 10 Troubleshooting 10.1 Overview: Troubleshooting ............................116 10.2 Solving problems based on error codes .........................
  • Page 5 Table of contents 19.2.7 Symptom: White mist comes out of a unit (Indoor unit, outdoor unit)............158 19.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes..158 19.2.9 Symptom: Noise of air conditioners (Indoor unit)..................159 19.2.10 Symptom: Noise of air conditioners (Indoor unit, outdoor unit) ..............

  • Page 6: General Safety Precautions

    General safety precautions 1 General safety precautions 1.1 About the documentation ▪ The original documentation is written in English. All other languages are translations. ▪ The precautions described in this document cover very important topics, follow them carefully. ▪ The installation of the system, and all activities described in the installation manual and in the installer reference guide MUST be performed by an authorised installer.

  • Page 7: For The User

    General safety precautions Symbol Explanation Before performing maintenance and service tasks, read the service manual. For more information, see the installer and user reference guide. 1.2 For the user ▪ If you are NOT sure how to operate the unit, contact your installer. ▪...

  • Page 8: For The Installer

    Improper installation or attachment of equipment or accessories could result in electric 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 ▪ Instructions for shutting down the system in case of an emergency ▪ Name and address of fire department, police and hospital ▪ Name, address and day and night telephone numbers for obtaining service In Europe, EN378 provides the necessary guidance for this logbook. 1.3.2 Installation site ▪...
  • Page 10 General safety precautions 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 11: Brine

    General safety precautions ▪ Charge the refrigerant in liquid form. Adding it in gas form may prevent normal operation. CAUTION When the refrigerant charging procedure is done or when pausing, close the valve of the refrigerant tank immediately. If the valve is NOT closed immediately, remaining pressure might charge additional refrigerant.
  • Page 12 General safety precautions WARNING 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. WARNING ▪ ONLY use copper wires. ▪...
  • 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: 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 15 About the documentation RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump 4P546228-1A – 2019.10...

  • Page 16: About The Box

    About the box 3 About the box 3.1 Overview: About the box This chapter describes what you have to do after the box with the outdoor unit is delivered on-site. It contains information about: ▪ Unpacking and handling the outdoor unit ▪...

  • Page 17: To Unpack The Outdoor Unit

    About the box 3.2 To unpack the outdoor unit Remove the packaging material from the unit: ▪ Take care not to damage the unit when removing the shrink foil with a cutter. ▪ Remove the 4 bolts fixing the unit to its pallet. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them.

  • Page 18: Accessory Pipes: Diameters

    About the box b Installation manual and operation manual c Additional refrigerant charge label d Installation information sticker e Fluorinated greenhouse gases label f Multilingual fluorinated greenhouse gases label g Piping accessory bag 3.4 Accessory pipes: Diameters Accessory pipes (mm) Øa Øb Gas pipe...
  • Page 19 About the box 1 Slightly loosen the fixing nut (a). 2 Remove the transportation stay (b) as shown in the figure below. 3 Tighten the fixing nut (a) again. 3 (12.3 N·m) 3 (12.3 N·m) RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump 4P546228-1A –...

  • Page 20: About The Units And Options

    About the units and options 4 About the units and options 4.1 Overview: About the units and options This chapter contains information about: ▪ Identification of the outdoor unit ▪ Where the outdoor unit fits in the system layout ▪ With which indoor units and options you can combine the outdoor units ▪...

  • Page 21: About The Outdoor Unit

    About the units and options 4.3 About the outdoor unit This installation manual concerns the VRV IV, full inverter driven, heat pump system. Model line up: Model Description RYYQ8~20 Single continuous heating model. RYYQ22~54 Multi continuous heating model (consisting of 2 or 3 RYMQ modules).

  • Page 22: Combining Units And Options

    About the units and options g User interface (dedicated depending on indoor unit type) h User interface (wireless, dedicated depending on indoor unit type) i Cool/heat changeover remote control switch 4.5 Combining units and options 4.5.1 About combining units and options NOTICE To be sure your system setup (outdoor unit+indoor unit(s)) will work, you have to consult the latest technical engineering data for VRV IV heat pump.

  • Page 23: Possible Options For The Outdoor Unit

    About the units and options Possible standard combinations of outdoor units 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. ▪ RXYQ22~54 consists of 2 or 3 RXYQ8~20 units. ▪...
  • Page 24 About the units and options Description Model name Refnet joint KHRQ22M20T KHRQ22M29T9 KHRQ22M64T KHRQ22M75T For the selection of the optimal branching kit, please refer to "5.3.3  To select refrigerant branch kits" [  33]. Outdoor multi connection piping kit Number of outdoor units Model name BHFQ22P1007 BHFQ22P1517...

  • Page 25: Preparation

    Preparation 5 Preparation 5.1 Overview: Preparation This chapter describes what you have to do and know before going on-site. It contains information about: ▪ Preparing the installation site ▪ Preparing the refrigerant piping ▪ Preparing the electrical wiring 5.2 Preparing the installation site 5.2.1 Installation site requirements of the outdoor unit ▪...
  • Page 26 Preparation (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 27: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates

    Preparation If the outdoor unit is exposed to direct sea winds, install a windbreaker. ▪ 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 ▪...

  • Page 28: 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. 5.2.3 Securing safety against refrigerant leaks...
  • Page 29 Preparation Compliance to the local applicable regulations and standards for the maximum allowable concentration level is required. According to the appropriate European Standard, the maximum allowed concentration level of refrigerant to a humanly space for R410A is limited to 0.44 kg/m a Direction of the refrigerant flow b Room where refrigerant leak has occurred (outflow of all the refrigerant from the system)

  • Page 30: Preparing Refrigerant Piping

    Preparation 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 31: To Select The Piping Size

    Preparation 5.3.2 To select the piping size Determine the proper size using the following tables and reference figure (only for indication). 1,2 VRV DX indoor unit 3 Branch selector box (BP*) 4,5 RA DX indoor unit a,b Indoor branch kit x,y Outdoor multi connection kit 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.
  • Page 32 Preparation Example: ▪ Downstream capacity for E=capacity index of unit 1 ▪ Downstream capacity for D=capacity index of unit 1+capacity index of unit 2 E: Piping between refrigerant branch kit and indoor unit Pipe size for direct connection to indoor unit must be the same as the connection size of the indoor unit (in case indoor unit is VRV DX indoor or Hydrobox).

  • Page 33: To Select Refrigerant Branch Kits

    Preparation Pipe Ø (mm) Minimal thickness t (mm) 6.4/9.5/12.7 0.80 15.9 0.99 19.1/22.2 0.80 28.6 0.99 34.9 1.21 41.3 1.43 ▪ In case the required pipe sizes (inch sizes) are not available, it is also allowed to use other diameters (mm sizes), taken the following into account: Select the pipe size nearest to the required size.
  • Page 34 Preparation Outdoor unit capacity type (HP) 2 pipes 8+10 KHRQ22M29T9 12~22 KHRQ22M64T 24~54 KHRQ22M75T ▪ For refnet joints other than the first branch (example refnet joint b), select the proper branch kit model based on the total capacity index of all indoor units connected after the refrigerant branch.

  • Page 35: About The Piping Length

    Preparation There is never a connection of the equalising pipe with the indoor units. Example: (free multi combination) RYMQ8+RYMQ12+RYMQ18. Largest connection is Ø28.6 (RYMQ18); Ø22.2 (RYMQ12) and Ø19.1 (RYMQ8). In figure below only equalising pipe is shown. Ø22.2 mm Ø28.6 mm Ø19.1 mm INFORMATION Reducers or T-joints are field supplied.
  • Page 36 Preparation System setup Example Description Example 1.1 Single outdoor Branch with refnet joint Example 1.2 Single outdoor Branch with refnet joint and refnet header Example 1.3 Single outdoor Branch with refnet header Example 2.1 Multi outdoor Branch with refnet joint Example 2.2 Multi outdoor Branch with refnet joint...
  • Page 37 Preparation Maximum allowable length ▪ Between outdoor and indoor units (single/multi combinations) Actual piping length 165 m/135 m Example 1.1 ▪ unit 8: a+b+c+d+e+f+g+p≤165 m Example 1.2 ▪ unit 6: a+b+h≤165 m ▪ unit 8: a+i+k≤165 m Example 1.3 ▪ unit 8: a+i≤165 m Example 2.1 ▪ unit 8: a+b+c+d+e+f+g+p≤135 m Equivalent length 190 m/160 m Total piping length 1000 m/500 m...
  • Page 38 Preparation Maximum allowable height difference ≤50 m (40 m) (if outdoor is located below indoor units) Conditional extension up till 90 m is possible without additional option kit: ▪ In case the outdoor location is higher than indoor: extension is possible up till 90 m and following 2 conditions must be fulfilled: Liquid piping size up (see table "Size up"...

  • Page 39: Piping Length: Vrv Dx And Hydrobox

    Preparation It is necessary to increase the pipe size of the gas and liquid piping if the pipe length between the first branch kit and the farthest indoor unit is over 40 m. If the increased pipe size is larger than the pipe size of the main pipe, then the pipe size of the main pipe has to be increased as well.

  • Page 40: Piping Length: Vrv Dx And Ra Dx

    Preparation Maximum allowable length Between outdoor and indoor units. Actual piping length 135 m Example 1: ▪ a+b+c+d+e+f+g+p≤135 m ▪ a+b+c+d+k≤135 m Example 2: ▪ a+i+k≤135 m ▪ a+b+e≤135 m Example 3: ▪ a+i≤135 m ▪ a+d≤135 m Equivalent length 160 m Total piping length 300 m Example 3: ▪...

  • Page 41: Multiple Outdoor Units: Possible Layouts

    Preparation 6,7 VRV DX indoor units Maximum allowable length ▪ Between outdoor unit and indoor unit. Actual piping length 100 m Example: a+b+g+l≤100 m Equivalent length 120 m Total piping length 250 m Example: a+b+d+g+l+k+c+e+f+h+i+j≤250 m (a) Assume equivalent piping length of refnet joint=0.5 m and refnet header=1 m (for calculation purposes).
  • Page 42 Preparation Pattern 1 Pattern 2 a To indoor unit b Piping between outdoor units X Not allowed (oil remains in piping) O 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 43: Preparing Electrical Wiring

    Preparation 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 44: About Electrical Compliance

    Preparation WARNING ▪ All wiring MUST be performed by an authorised electrician and MUST comply with the applicable legislation. ▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. WARNING The backup heater MUST have a dedicated power supply and MUST be protected by the safety devices required by the applicable legislation.

  • Page 45: Safety Device Requirements

    Preparation Model (Ω) Minimum S value (kVA) RYYQ24/RXYQ24 — 11597 RYYQ26/RXYQ26 — 12831 RYYQ28/RXYQ28 — 13585 RYYQ30/RXYQ30 — 14843 RYYQ32/RXYQ32 — 15094 RYYQ34/RXYQ34 — 16352 RYYQ36/RXYQ36 — 17359 RYYQ38/RXYQ38 — 19397 RYYQ40/RXYQ40 — 20378 RYYQ42/RXYQ42 — 20629 RYYQ44/RXYQ44 — 21132 RYYQ46/RXYQ46 —...
  • Page 46 Preparation Model Minimum circuit Recommended ampacity fuses RYYQ20/RYMQ20/RXYQ20 39.0 A 50 A RYYQ22/RXYQ22 46.0 A 63 A RYYQ24/RXYQ24 46.0 A 63 A RYYQ26/RXYQ26 51.0 A 63 A RYYQ28/RXYQ28 55.0 A 63 A RYYQ30/RXYQ30 59.0 A 80 A RYYQ32/RXYQ32 62.0 A 80 A RYYQ34/RXYQ34 66.0 A 80 A RYYQ36/RXYQ36 70.0 A 80 A RYYQ38/RXYQ38 76.0 A 100 A RYYQ40/RXYQ40 81.0 A 100 A RYYQ42/RXYQ42 84.0 A 100 A...
  • Page 47 Preparation NOTICE When using residual current operated circuit breakers, be sure to use a high-speed type 300 mA rated residual operating current. RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump 4P546228-1A – 2019.10...

  • Page 48: Installation

    Installation 6 Installation 6.1 Overview: Installation This chapter describes what you have to do and know on-site to install the system. Typical workflow Installation typically consists of the following stages: Opening the units Mounting the outdoor unit Connecting the refrigerant piping Checking the refrigerant piping Insulating the refrigerant piping Charging refrigerant...

  • Page 49: To Open The Electrical Component Box Of The Outdoor Unit

    Installation 6.2.2 To open the electrical component box of the outdoor unit NOTICE Do NOT apply excessive force when opening the electronic component box cover. Excessive force can deform the cover, resulting in entering of water to cause equipment failure. 8~12 HP 2×...
  • Page 50 Installation NOTICE ▪ When the installation height of the unit needs to be increased, do NOT use stands to only support the corners. ▪ Stands under the unit must be at least 100 mm wide. X Not allowed O Allowed (* = preferred installation) ▪...

  • Page 51: Connecting The Refrigerant Piping

    Installation 6.4 Connecting the refrigerant piping 6.4.1 Precautions when connecting the refrigerant piping NOTICE Make sure refrigerant piping installation complies with applicable legislation. In Europe, EN378 is the applicable standard. 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).

  • Page 52: To Route The Refrigerant Piping

    Installation 6.4.3 To route the refrigerant piping Installation of refrigerant piping is possible as front connection or side connection (when taken out from the bottom) as shown in the figure below. 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...

  • Page 53: To Connect The Multi Connection Piping Kit

    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 54: Multiple Outdoor Units: Knockout Holes

    Installation 6.4.6 Multiple outdoor units: Knockout holes Connection Description Front connection Remove the front plate knockout holes to connect. Bottom connection Remove the knockout holes on the bottom frame and route the piping under the bottom. 6.4.7 To connect the refrigerant branching kit For installation of the refrigerant branching kit, refer to the installation manual delivered with the kit.

  • Page 55: To Braze The Pipe End

    Installation Unit Installation period Protection method Outdoor unit >1 month Pinch the pipe <1 month Pinch or tape the pipe Indoor unit Regardless of the period Seal the piping and wiring intake holes using sealing material (field supply), otherwise the capacity of the unit will drop and small animals may enter the machine.

  • Page 56: Using The Stop Valve And Service Port

    Installation ▪ Do NOT use anti-oxidants when brazing pipe joints. Residue can clog pipes and break equipment. ▪ Do NOT use flux when brazing copper-to-copper refrigerant piping. Use phosphor copper brazing filler alloy (BCuP), which does not require flux. Flux has an extremely harmful influence on refrigerant piping systems. For instance, if chlorine based flux is used, it will cause pipe corrosion or, in particular, if the flux contains fluorine, it will deteriorate the refrigerant oil.

  • Page 57: To Remove The Pinched Pipes

    Installation 3 Tighten the stop valve securely when opening or closing the stop valve. For the correct tightening torque value, refer to the table below. NOTICE Inadequate torque may cause leakage of refrigerant and breakage of the stop valve. 4 Install the dust cap. Result: The valve is now open/closed.
  • Page 58 Installation d Refrigerant R410A tank (siphon system) e Vacuum pump f Liquid line stop valve g Gas line stop valve A Valve A B Valve B 3 Recover gas and oil from the pinched piping by using a recovery unit. CAUTION Do not vent gases into the atmosphere.

  • Page 59: Checking The Refrigerant Piping

    Installation 6.5 Checking the refrigerant piping 6.5.1 About checking the refrigerant piping Refrigerant piping works are Finish piping work. finished? The indoor units and/or Use procedure: outdoor unit were already "Method 1: Before power ON powered ON? (regular method)". Use procedure: "Method 2: After power ON".

  • Page 60: Checking Refrigerant Piping: General Guidelines

    Installation Only field installed refrigerant piping needs to be checked. Therefore, make sure that all the outdoor unit stop valves are firmly closed before performing leak test or vacuum drying. NOTICE Make sure that all (field supplied) field piping valves are OPEN (not outdoor unit stop valves!) before you start leak test and vacuuming.

  • Page 61: To Perform A Leak Test

    Installation Valve State of valve Liquid line stop valve Close Gas line stop valve Close Equalising line stop valve Close NOTICE The connections to the indoor units and all indoor units should also be leak and vacuum tested. Keep any possible (field supplied) field piping valves open as well. Refer to the indoor unit installation manual for more details.

  • Page 62: To Insulate The Refrigerant Piping

    Installation 1 Evacuate the system for at least 2 hours to a target vacuum of –⁠ 1 00.7  kPa (–⁠ 1 .007 bar)(5 Torr absolute). 2 Check that, with the vacuum pump turned off, the target vacuum is maintained for at least 1 hour. 3 Should you fail to reach the target vacuum within 2 hours or maintain the vacuum for 1 hour, the system may contain too much moisture.

  • Page 63: Charging Refrigerant

    Installation 6.7 Charging refrigerant 6.7.1 Precautions when charging refrigerant WARNING ▪ Only use R410A as refrigerant. Other substances may cause explosions and accidents. ▪ R410A contains fluorinated greenhouse gases. Its global warming potential (GWP) value is 2087.5. Do NOT vent these gases into the atmosphere. ▪...

  • Page 64: About Charging Refrigerant

    Installation 6.7.2 About charging refrigerant Once vacuum drying is finished, additional refrigerant charging can start. There are two methods to charge additional refrigerant. Method Automatic charge "6.7.6 Step 6a: To automatically charge refrigerant" [  72] Manual charge "6.7.7 Step 6b: To manually charge refrigerant" [  73] INFORMATION...
  • Page 65 Installation Parameter A Piping length 8 HP 10~14 HP 16~20 HP >30 m 50%≤CR≤70% 0 kg 0.5 kg 70%<CR≤85% 0.3 kg 0.5 kg 1.0 kg 85%<CR≤105% 0.7 kg 1.0 kg 1.5 kg 105%<CR≤130% 1.2 kg 1.5 kg 2.0 kg (a) In case of a multi-outdoor-unit system, add the sum of the individual outdoor unit charge factors.
  • Page 66 Installation Action Determine parameter C: ▪ ▪ 8 HP: N≥4 => C1=N×0.1=5×0.1 kg ▪ 12 HP: N<6 => C2=0 kg => C=C1+C2=0.5 kg Metric piping. When using metric piping, replace the weight factors in the formula by the ones from the following table: Inch piping Metric piping Piping Weight factor...

  • Page 67: To Charge Refrigerant: Flow Chart

    Installation 6.7.4 To charge refrigerant: Flow chart For more information, see "6.7.5 To charge refrigerant" [  69]. Pre-charging refrigerant Step 1 p < p > Calculate additional refrigerant charge amount: R (kg) Step 2+3 R410A • Open valves C, D and B to the liquid and equalising line •...
  • Page 68 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 69: To Charge Refrigerant

    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 70 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 ports of the liquid and equalising stop valves (open valve B).
  • Page 71 Installation Charging refrigerant 5 After pre-charging, connect valve A to the refrigerant charge port and charge the remaining additional refrigerant through this port. Open all outdoor unit stop valves. At this point, valve A must remain closed! p < p > R410A a Weighing scales b Refrigerant R410A tank (siphon system)

  • Page 72: Step 6A: To Automatically Charge Refrigerant

    Installation 6.7.6 Step 6a: To automatically charge refrigerant INFORMATION The automatic refrigerant charging has limits as described below. Out of these limits, the system cannot operate the automatic refrigerant charging: ▪ Outdoor temperature: 0~43°C DB. ▪ Indoor temperature: 10~32°C DB. ▪ Total indoor unit capacity: ≥80%. The remaining additional refrigerant charge can be charged by operating the outdoor unit by means of the automatic refrigerant charge operation mode.

  • Page 73: Step 6B: To Manually Charge Refrigerant

    Installation Then " ", " ", or " " appears Push BS1 to finish the automatic charging function procedure. The ambient conditions are favourable to execute the test run. " ", or " " appears The ambient conditions are NOT favourable to execute the test run.

  • Page 74: Error Codes When Charging Refrigerant

    Installation 3 Activate outdoor unit setting [2‑20]=1 to start manual refrigerant charge mode. Refer to "7.2.8 Mode 2: Field settings" [  92] for details. Result: The unit will start operation. 4 Valve A can be opened. Charging of remaining additional refrigerant can be done.

  • Page 75: Checks After Charging Refrigerant

    Installation Code Cause Solution Indicates an indoor unit which Refer to requirements to be is not compatible with leak able to execute leak detection detection functionality is operation. installed (e.g., RA DX indoor unit, Hydrobox, …) Other — Close valve A immediately. malfunction Confirm the malfunction code code...

  • Page 76: Connecting The Electrical Wiring

    Installation 6.8 Connecting the electrical wiring 6.8.1 Precautions when connecting the electrical wiring DANGER: RISK OF ELECTROCUTION WARNING All field wiring and components MUST be installed by a licensed electrician and MUST comply with the applicable legislation. WARNING 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.

  • Page 77: Field Wiring: Overview

    Installation NOTICE Do NOT install a phase advancing capacitor, because this unit is equipped with an inverter. A phase advancing capacitor will reduce performance and may cause accidents. NOTICE NEVER remove a thermistor, sensor, etc., when connecting power wiring and transmission wiring.

  • Page 78: About The Electrical Wiring

    Installation 6.8.3 About the electrical wiring It is important to keep the power supply and the transmission wiring separated from each other. In order to avoid any electrical interference the distance between both wiring should always be at least 25 mm. NOTICE ▪...

  • Page 79: Guidelines When Knocking Out Knockout Holes

    Installation For the above wiring, always use vinyl cords with 0.75 to 1.25 mm sheath or cables (2-core wires). (3-core wire cables are allowable for the cooler/heater changeover user interface only.) 6.8.4 Guidelines when knocking out knockout holes ▪ To punch a knockout hole, hit on it with a hammer. ▪...

  • Page 80: To Connect The Transmission Wiring

    Installation (a) Knockout hole has to be removed. Close the hole to avoid small animals or dirt from entering. 8~12 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 d Field supplied clamps...

  • Page 81: To Finish The Transmission Wiring

    Installation In case of multi outdoor unit installation F1 F2 F1 F2 Q1 Q2 Q1 Q2 Q1 Q2 a Unit A (master outdoor unit) b Unit B (slave outdoor unit) c Unit C (slave outdoor unit) d Master/slave transmission (Q1/Q2) e Outdoor/indoor transmission (F1/F2) f Outdoor unit/other system transmission (F1/F2) INFORMATION...

  • Page 82: To Connect The Power Supply

    Installation 8~12 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 83 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 84: Configuration

    Configuration 7 Configuration 7.1 Overview: Configuration This chapter describes what you have to do and know to configure the system after it is installed. It contains information about: ▪ Making field settings ▪ Energy saving and optimum operation ▪ Using the leak detection function INFORMATION It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable.

  • Page 85: Field Setting Components

    Configuration See also: ▪ "7.2.2 Field setting components" [  85] ▪ "7.2.3 To access the field setting components" [  86] PC configurator For VRV IV heat pump system it is alternatively possible to make several commissioning field settings through a personal computer interface (for this, option EKPCCAB is required).

  • Page 86: To Access The Field Setting Components

    Configuration 7.2.3 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 87: To Use Mode 1

    Configuration Stage Display When no trouble occurs: lighted as indicated (8~10 min). Ready for operation: blank display indication as indicated. 7‑segment display indications: Blinking When above situation cannot be confirmed after 12 min, the malfunction code can be checked on the indoor unit user interface and the outdoor unit 7‑segment display.

  • Page 88: To Use Mode 2

    Configuration 2 Push BS1 one time. Result: Mode 1 is accessed: 3 Push BS2 10 times. Result: Mode 1 setting 10 is addressed: 4 Push BS3 one time; the value which is returned (depending on the actual field situation), is the amount of indoor units which are connected to the system. Result: Mode ...

  • Page 89: Mode 1: Monitoring Settings

    Configuration 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. In the case of [2‑18], default value is "0", which means the function is not active.
  • Page 90 Configuration Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions. [1‑2] Description Unit is currently not operating under power consumption limitations. Unit is currently operating under power consumption limitation. Power consumption limitation can be set in mode  2. There are two methods to activate power consumption limitation of the outdoor unit system.
  • Page 91 Configuration [1‑29] [1‑30] [1‑31] Shows the estimated leaked refrigerant amount (kg) based on: ▪ [1‑29]: The latest leak detection operation. ▪ [1‑30]: The 2nd last leak detection operation. ▪ [1‑31]: The 3rd last leak detection operation. To be able to use the leak detection operation, see "7.4 Using the leak detection function" [  105].

  • Page 92: Mode 2: Field Settings

    Configuration ▪ [1‑40]: The current cooling comfort setting. ▪ [1‑41]: The current heating comfort setting. "7.3 Energy saving and optimum operation" [  99] for more details about this setting. 7.2.8 Mode 2: Field settings [2‑0] Cool/Heat selection setting. Cool/Heat selection setting is used in case the optional Cool/Heat selector (KRC19-26A and BRP2A81) is used.
  • Page 93 Configuration [2‑9] target (°C) For more information and advice about the impact of these settings, see "7.3 Energy saving and optimum operation" [  99]. [2‑12] Enable the low noise function and/or power consumption limitation via external control adaptor (DTA104A61/62). If the system needs to be running under low noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed.
  • Page 94 Configuration [2‑14] Additional amount charged (kg) Setting cannot be used. Total refrigerant charge has to be <100 kg. ▪ For details concerning the charging procedure, see "6.7.2  About charging refrigerant" [  64]. ▪ For details concerning the calculation of additional refrigerant charge amount, "6.7.3 To determine the additional refrigerant amount" [  64].
  • Page 95 Configuration [2‑21] Description Activated. To stop the refrigerant recovery/vacuuming mode, push BS3. If BS3 is not pushed, the system will remain in refrigerant recovery/vacuuming mode. [2‑22] Automatic low noise setting and level during night time. By changing this setting, you activate the automatic low noise operation function of the unit and define the level of operation.
  • Page 96 Configuration [2‑27] Stop time automatic low noise operation (approximately) 7h00 3 (default) 8h00 [2‑30] Power consumption limitation level (step  1) 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 1.
  • Page 97 Configuration [2‑35] Height difference setting. [2‑35] Description In case the outdoor unit is installed in the lowest position (indoor units are installed on a higher position than outdoor units) and the height difference between the highest indoor unit and the outdoor unit exceeds 40 m, the setting [2‑35] should be changed to 0.
  • Page 98 Configuration [2‑83] Master user interface allocation in case VRV  DX indoor units and RA  DX indoor units are used at the same time. By changing setting [2‑83], you can allow the VRV  DX indoor unit to be the operation mode selector (system power OFF/ON is required after applying this setting).

  • Page 99: To Connect The Pc Configurator To The Outdoor Unit

    Configuration 7.2.9 To connect the PC configurator to the outdoor unit X27A a PC b Cable (EKPCCAB) c Outdoor unit main PCB 7.3 Energy saving and optimum operation This heat pump system is equipped with advanced energy saving functionality. Depending on the priority, emphasises can be put on energy saving or comfort level.

  • Page 100: 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 101 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 102 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 103: Example: Automatic Mode During Cooling

    Configuration 7.3.3 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 104: Example: Automatic Mode During Heating

    Configuration 7.3.4 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 105: Using The Leak Detection Function

    Configuration F Powerful 7.4 Using the leak detection function 7.4.1 About automatic leak detection The (automatic) leak detection function is not by default activated. The (automatic) leak detection function can only start working when both below conditions are fulfilled: ▪ The additional refrigerant charge was inputted in the system's logic (see [2‑14]).
  • Page 106 Configuration 4 Leak detection function will start. To abort leak detection operation, push BS1. Result: If manual leak detection was executed, the result of leak detection is shown on the outdoor unit 7‑segment display. Indoor units are in locked state (centralised control symbol).
  • Page 107 Configuration Result of leak detection operation is informed in [1‑35] and [1‑29]. Steps during leak detection: Display Steps Preparation Pressure equalisation Start up Leak detection operation Standby Leak detection operation is finished (a) If the indoor temperature is too low, first the heating operation will start. (b) If the indoor temperature is lower than 15°C due to leak detection operation and the outdoor temperature is lower than 20°C, the heating operation will start to maintain basic comfort heating level.

  • Page 108: Commissioning

    Commissioning 8 Commissioning 8.1 Overview: Commissioning After installation and once the field settings are defined, the installer is obliged to verify correct operation. Therefore a test run MUST be performed according to the procedures described below. This chapter describes what you have to do and know to commission the system after it is configured.

  • Page 109: Checklist Before Commissioning

    Commissioning During test operation, the outdoor unit and the indoor units will start up. Make sure that the preparations of all indoor units are finished (field piping, electrical wiring, air purge, ...). See installation manual of the indoor units for details. 8.3 Checklist before commissioning After the installation of the unit, first check the items listed below.

  • Page 110: About The Test Run

    Commissioning Air inlet/outlet Check that the air inlet and outlet of the unit is NOT obstructed by paper sheets, cardboard, or any other material. Additional refrigerant charge The amount of refrigerant to be added to the unit shall be written on the included "Added refrigerant"...

  • Page 111: To Perform A Test Run

    Commissioning INFORMATION ▪ When [2‑88]=0, the test operation time can take up to 4 hours. ▪ When [2‑88]=0 and the test operation was aborted before the end, the warning code will be visible on the user interface. It is possible to operate the system.

  • Page 112: Correcting After Abnormal Completion Of The Test Run

    Commissioning Steps during the automatic system test run procedure: Step Description Control before start up (pressure equalisation) Cooling start up control Cooling stable condition Communication check Stop valve check Pipe length check Refrigerant amount check In case [2‑88]=0, detailed refrigerant situation check Pump down operation Unit stop Note: During the test operation, it is not possible to stop the unit operation from a...

  • Page 113: Maintenance And Service

    Maintenance and service 9 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 114: About Service Mode Operation

    Maintenance and service 8~12 HP 14~20 HP X6A (A6P) X5A (A3P) 3 To prevent damaging the PCB, touch a non-coated metal part to eliminate static electricity before pulling out or plugging in connectors. 4 Pull out junction connectors X1A, X2A for the fan motors in the outdoor unit before starting service operation on the inverter equipment.
  • Page 115 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 116: Troubleshooting

    Troubleshooting 10 Troubleshooting 10.1 Overview: Troubleshooting This chapter describes what you have to do in case of problems. It contains information about: ▪ Solving problems based on error codes 10.2 Solving problems based on error codes In case of a displayed malfunction code, perform correcting actions as explained in the malfunction code table.
  • Page 117 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 High pressure switch was Check stop valve situation or activated (S1PH, S2PH) - A1P abnormalities in (field) piping (X2A , X3A) or airflow over air cooled coil. ▪ Refrigerant overcharge ▪...
  • Page 118 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 - A1P (X19A) Discharge temperature sensor Check connection on PCB or malfunction (R21T): short actuator. circuit - A1P (X19A) Discharge temperature sensor Check connection on PCB or...
  • Page 119 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 High pressure sensor Check connection on PCB or malfunction (S1NPH): open actuator. circuit - A1P (X32A) High pressure sensor Check connection on PCB or malfunction (S1NPH): short actuator. circuit - A1P (X32A) Low pressure sensor Check connection on PCB or...
  • Page 120 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Warning indication: Leak Execute autocharge function detection or refrigerant (see manual); unit not ready amount check not performed for leak detection (system operation possible) functionality. Malfunction code: System test Execute system test run.
  • Page 121 Troubleshooting Main code Sub code Cause Solution Master Slave 1 Slave 2 Auto address malfunction Check if transmission wired (inconsistency) unit amount matches with powered unit amount (by monitor mode) or wait till initialisation is finished. Stop valve closed or wrong Open stop valves.

  • Page 122: Disposal

    Disposal 11 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. RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump...

  • Page 123: Technical Data

    Technical data 12 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). 12.1 Overview: Technical data This chapter contains information about: ▪...
  • Page 124 Technical data Layout A+B+C+D Possibility 1 Possibility 2 a≥10 mm a≥50 mm a≥200 mm b≥300 mm b≥100 mm b≥300 mm c≥10 mm c≥50 mm d≥500 mm d≥500 mm e≥20 mm e≥100 mm e≥400 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 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...
  • Page 125 Technical data INFORMATION Further specifications can be found in the technical engineering data. RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump 4P546228-1A – 2019.10...

  • Page 126: Piping Diagram: Outdoor Unit

    Technical data 12.3 Piping diagram: Outdoor unit Piping diagram: RYYQ8~12 (S1NPL) (S1NPH) (S1PH) R21T a Compressor (M1C) b Compressor (M2C) c Heat exchanger d Fan e Fan motor (M1F, M2F) f Accumulator g Expansion valve, main (Y1E) h Expansion valve, subcool heat exchanger (Y2E) i Expansion valve, storage vessel (Y4E) j Subcool heat exchanger k Oil separator...
  • Page 127 Technical data Piping diagram: RYYQ14~20 (S1NPL) (S1NPH) (S1PH) (S2PH) R22T R21T a Compressor (M1C) b Compressor (M2C) c Heat exchanger d Fan e Fan motor (M1F, M2F) f Accumulator g Expansion valve, main (Y1E) h Expansion valve, subcool heat exchanger (Y2E) i Expansion valve, storage vessel (Y4E) j Subcool heat exchanger k Oil separator...
  • Page 128 Technical data Piping diagram: RYMQ8~12 (S1NPL) (S1NPH) (S1PH) R21T a Compressor (M1C) b Compressor (M2C) c Heat exchanger d Fan e Fan motor (M1F, M2F) f Accumulator g Expansion valve, main (Y1E) h Expansion valve, subcool heat exchanger (Y2E) i Expansion valve, storage vessel (Y4E) j Subcool heat exchanger k Oil separator l Solenoid valve, oil accumulator (Y2S)
  • Page 129 Technical data a Compressor (M1C) b Compressor (M2C) c Heat exchanger d Fan e Fan motor (M1F, M2F) f Accumulator g Expansion valve, main (Y1E) h Expansion valve, subcool heat exchanger (Y2E) i Expansion valve, storage vessel (Y4E) j Subcool heat exchanger k Oil separator l Solenoid valve, oil accumulator (Y2S) m Solenoid valve, oil1 (Y3S)
  • Page 130 Technical data Piping diagram: RXYQ14~20 (S1NPL) (S1NPH) (S1PH) (S2PH) R22T R21T a Compressor (M1C) b Compressor (M2C) c Heat exchanger d Fan e Fan motor (M1F, M2F) f Accumulator g Expansion valve, main (Y1E) h Expansion valve, subcool heat exchanger (Y2E) i Expansion valve, storage vessel (Y4E) j Subcool heat exchanger k Oil separator...

  • Page 131: Wiring Diagram: Outdoor Unit

    Technical data 12.4 Wiring diagram: Outdoor unit Refer to the wiring diagram sticker on the unit. The abbreviations used are listed below: INFORMATION The wiring diagram on the outdoor unit is only for the outdoor unit. For the indoor unit or optional electrical components, refer to the wiring diagram of the indoor unit. This wiring diagram applies only to the outdoor unit.
  • Page 132 Technical data Green Legend for wiring diagram 8~12 HP: Printed circuit board (main) Printed circuit board (noise filter) Printed circuit board (inverter) Printed circuit board (fan) Printed circuit board (ABC I/P) (option) BS1~BS3 (A1P) Push button switch (MODE, SET, RETURN) C* (A3P) Capacitor DS1, DS2 (A1P) DIP switch...
  • Page 133 Technical data Thermistor (heat exchanger, gas pipe) Thermistor (heat exchanger, de-icer) Thermistor (M1C body) R21T Thermistor (M1C discharge) S1NPH Pressure sensor (high) S1NPL Pressure sensor (low) S1PH Pressure switch (discharge) SEG1~SEG3 7-segment display (A1P) Current sensor V1D (A3P) Diode V1R (A3P, A4P) Power module Connector X1M (A1P) Terminal block (control)
  • Page 134 Technical data DS1 , DS2 DIP switch (A1P) E1HC Crankcase heater Drain pan heater (option) F1U, F2U (A1P) Fuse (T 3.15 A / 250 V) Field fuse F101U (A4P, Fuse A7P) F401U, F403U Fuse (A2P, A5P) F601U, (A3P, Fuse A6P) HAP (A*P) Pilot lamp (service monitor is green) K3R (A3P, A6P) Magnetic relay K3R (A1P)
  • Page 135 Technical data S1NPH Pressure sensor (high) S1NPL Pressure sensor (low) S1PH, S2PH Pressure switch (discharge) SEG1~SEG3 7-segment display (A1P) Current sensor V1D (A3P) Diode V1R (A3P, A4P, Power module A6P, A7P) Connector X1M (A1P) Terminal block (control) X1M (A8P) Terminal block (power supply)(option) Electronic expansion valve (main) Electronic expansion valve (sub‑cool) Electronic expansion valve (liquid cooling)

  • Page 136: For The User

    Technical data RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump 4P546228-1A – 2019.10...

  • Page 137: About The System

    About the system 13 About the system The indoor unit part of VRV IV 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. NOTICE Do NOT use the system for other purposes. In order to avoid any quality deterioration, do NOT use the unit for cooling precision instruments, food, plants, animals, or works of art.
  • Page 138 About the system Model Description RXYQ Single and multi non-continuous heating model. Depending on the type of outdoor unit which is chosen, some functionality will or will not exist. It will be indicated throughout this operation manual when certain features have exclusive model rights or not. a VRV IV Heat pump outdoor unit b Refrigerant piping c VRV direct expansion (DX) indoor unit...

  • Page 139: User Interface

    User interface 14 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 140: Before Operation

    Before operation 15 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 141: Operation

    Operation 16 Operation 16.1 Operation range Use the system in the following temperature and humidity ranges for safe and effective operation. Cooling Heating Outdoor temperature –5~43°C DB –20~21°C DB –20~15.5°C WB Indoor temperature 21~32°C DB 15~27°C DB 14~25°C WB Indoor humidity ≤80% To avoid condensation and water dripping out of the unit. If the temperature or the humidity is beyond these conditions, safety devices may be put in action and the air conditioner may not operate.

  • Page 142: To Operate The System (Without Cool/Heat Changeover Remote Control Switch)

    Operation The following operation is performed in order to prevent the heating capacity from dropping or cold air from blowing. Defrost operation In heating operation, freezing of the outdoor unit's air cooled coil increases over time, restricting the energy transfer to the outdoor unit's coil. Heating capability decreases and the system needs to go into defrost operation to be able to remove frost from the outdoor unit’s coil.

  • Page 143: To Operate The System (With Cool/Heat Changeover Remote Control Switch)

    Operation 16.2.5 To operate the system (WITH cool/heat changeover remote control switch) Overview of the changeover remote control switch FAN ONLY/AIR CONDITIONING SELECTOR SWITCH Set the switch to for fan only operation or to for heating or cooling operation. COOL/HEAT CHANGEOVER SWITCH Set the switch to for cooling or to heating...

  • Page 144: To Use The Dry Program (Without Cool/Heat Changeover Remote Control Switch)

    Operation ▪ The micro computer automatically determines temperature and fan speed (cannot be set by the user interface). ▪ The system does not go into operation if the room temperature is low (<20°C). 16.3.2 To use the dry program (WITHOUT cool/heat changeover remote control switch) To start 1 Press the operation mode selector button on the user interface several times and select...

  • Page 145: Adjusting The Air Flow Direction

    Operation NOTICE Do not turn off power immediately after the unit stops, but wait for at least 5 minutes. 16.4 Adjusting the air flow direction Refer to the operation manual of the user interface. 16.4.1 About the air flow flap Double flow+multi-flow units Corner units Ceiling suspended units...

  • Page 146: Setting The Master User Interface

    Operation 16.5 Setting the master user interface 16.5.1 About setting the master user interface a VRV heat pump outdoor unit b VRV direct expansion (DX) indoor unit c BP box (required to connect Residential Air (RA) or Sky Air (SA) Direct Expansion (DX) indoor units) d Residential Air (RA) Direct Expansion (DX) indoor units) e User interface (dedicated depending on indoor unit type)

  • Page 147: To Designate The Master User Interface (Vrv Dx And Ra Dx)

    Operation 16.5.3 To designate the master user interface (VRV DX and RA DX) In case VRV DX indoor units and RA DX indoor units are connected (or only RA DX indoor units): Depending on field setting which was executed on the outdoor unit, the right for master selection lies with the VRV ...

  • Page 148: Energy Saving And Optimum Operation

    Energy saving and optimum operation 17 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 149: Available Comfort Settings

    Energy saving and optimum operation 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 150: Maintenance And Service

    Maintenance and service 18 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 151: About The Refrigerant

    Maintenance and service ▪ Let the indoor units run in fan only operation for about half a day in order to dry the interior of the units. Refer to "16.2.2  About cooling, heating, fan only, and automatic operation" [  141] for details on fan only operation. ▪...

  • Page 152: Recommended Maintenance And Inspection Cycles

    Maintenance and service permanent stock of essential components in order to keep your unit in operation as long as possible. Contact your dealer for more information. When asking your dealer for an intervention, always state: ▪ The complete model name of the unit. ▪...

  • Page 153: Shortened Maintenance And Replacement Cycles

    Maintenance and service 18.4.4 Shortened maintenance and replacement cycles Shortening of "maintenance cycle" and "replacement cycle" needs to be considered in following situations: The unit is used in locations where: ▪ Heat and humidity fluctuate out of the ordinary. ▪ Power fluctuation is high (voltage, frequency, wave distortion, etc.) (the unit cannot be used if power fluctuation is outside the allowable range).

  • Page 154: Troubleshooting

    Troubleshooting 19 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 155: 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 156 Troubleshooting Main code Contents Suction air thermistor malfunction (indoor) Discharge air thermistor malfunction (indoor) Movement detector or floor temperature sensor malfunction (indoor) User interface thermistor malfunction (indoor) PCB malfunction (outdoor) Current leakage detector was activated (outdoor) High pressure switch was activated Low pressure malfunction (outdoor) Compressor lock detection (outdoor) Fan motor malfunction (outdoor)

  • Page 157: Symptoms That Are Not System Malfunctions

    Troubleshooting Main code Contents Autocharge operation related Fin thermistor malfunction Autocharge operation related Autocharge operation related Autocharge operation related Capacity setting malfunction (outdoor) Abnormal low pressure drop, faulty expansion valve Reversed power supply phase malfunction INV voltage power shortage System test run not yet executed Faulty wiring indoor/outdoor Abnormal user interface - indoor communication Faulty wiring to outdoor/outdoor...

  • Page 158: Symptom: Cool/Heat Cannot Be Changed Over

    Troubleshooting 19.2.2 Symptom: Cool/Heat cannot be changed over ▪ When the display shows (change-over under centralized control), it shows that this is a slave user interface. ▪ When the cool/heat changeover remote control switch is installed and the display shows (change-over under centralized control), this is because cool/ heat changeover is controlled by the cool/ heat changeover remote control switch.

  • Page 159: Symptom: Noise Of Air Conditioners (Indoor Unit)

    Troubleshooting 19.2.9 Symptom: Noise of air conditioners (Indoor unit) ▪ A "zeen" sound is heard immediately after the power supply is turned on. The electronic expansion valve inside an indoor unit starts working and makes the noise. Its volume will reduce in about one minute. ▪...

  • Page 160: Symptom: The Compressor In The Outdoor Unit Does Not Stop After A Short Heating Operation

    Troubleshooting 19.2.16 Symptom: The compressor in the outdoor unit does not stop after a short heating operation This is to prevent refrigerant from remaining in the compressor. The unit will stop after 5 to 10 minutes. 19.2.17 Symptom: The inside of an outdoor unit is warm even when the unit has stopped This is because the crankcase heater is warming the compressor so that the compressor can start smoothly.

  • Page 161: Relocation

    Relocation 20 Relocation Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise. RYYQ+RYMQ+RXYQ8~20U7Y1B Installer and user reference guide VRV IV+ heat pump 4P546228-1A – 2019.10...

  • Page 162: Disposal

    Disposal 21 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 163: 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 164 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 168 4P546228-1A 2019.10 Verantwortung für Energie und Umwelt...

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