Daikin RXYSQ4T8VB Series Installer And User Reference Manual
Vrv iv-s system air conditioner
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Summary of Contents for Daikin RXYSQ4T8VB Series
- Page 1 Installer and user reference guide VRV IV-S system air conditioner RXYSQ4T8VB(*) RXYSQ5T8VB(*) RXYSQ6T8VB(*) RXYSQ4T8YB(*) RXYSQ5T8YB(*) RXYSQ6T8YB(*)
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Page 2: Table Of Contents
Table of contents Table of contents 1 About the documentation About this document ..............................Meaning of warnings and symbols..........................2 General safety precautions For the installer ................................2.1.1 General ................................2.1.2 Installation site ............................... 2.1.3 Refrigerant — in case of R410A or R32......................2.1.4 Electrical ................................. - Page 3 14 Technical data 14.1 Information requirements for Eco Design........................47 For the installer 15 About the box 15.1 About LOOP BY DAIKIN ..............................49 15.2 Overview: About the box ..............................49 15.3 Outdoor unit ................................... 50 15.3.1 To unpack the outdoor unit ........................... 50 15.3.2...
- Page 4 Table of contents 18.2.5 To flare the pipe end ............................73 18.2.6 To braze the pipe end............................. 74 18.2.7 Using the stop valve and service port......................75 18.2.8 To connect the refrigerant piping to the outdoor unit ................. 76 18.2.9 To connect the refrigerant branching kit.......................
- Page 5 Table of contents 24.2 Precautions when troubleshooting ..........................122 24.3 Solving problems based on error codes ......................... 122 24.3.1 Error codes: Overview ............................ 123 25 Disposal 26 Technical data 26.1 Service space: Outdoor unit ............................127 26.2 Piping diagram: Outdoor unit ............................129 26.3 Wiring diagram: Outdoor unit ............................
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Page 6: About The Documentation
The original documentation is written in English. All other languages are translations. Technical engineering data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of latest technical data is available on the Daikin Business Portal (authentication required). - Page 7 About the documentation DANGER: RISK OF ELECTROCUTION Indicates a situation that could result in electrocution. DANGER: RISK OF BURNING/SCALDING Indicates a situation that could result in burning/scalding because of extreme hot or cold temperatures. DANGER: RISK OF EXPLOSION Indicates a situation that could result in explosion. WARNING Indicates a situation that could result in death or serious injury.
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Page 8: General Safety Precautions
Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Daikin. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). -
Page 9: Installation Site
General safety precautions CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. NOTICE Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress. - Page 10 General safety precautions WARNING During tests, NEVER pressurize the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit). WARNING Take sufficient precautions in case of refrigerant leakage. If refrigerant gas leaks, ventilate the area immediately.
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Page 11: Electrical
General safety precautions Then A siphon tube is present Charge with the cylinder upright. (i.e., the cylinder is marked with "Liquid filling siphon attached") A siphon tube is NOT present Charge with the cylinder upside down. ▪ Open refrigerant cylinders slowly. ▪... - Page 12 General safety precautions WARNING ▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the applicable legislation. ▪ All field wiring MUST be performed in accordance with the wiring diagram supplied with the product. ▪ NEVER squeeze bundled cables and make sure they do NOT come in contact with the piping and sharp edges.
- Page 13 General safety precautions WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit. NOTICE Only applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method.
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Page 14: Specific Installer Safety Instructions
Specific installer safety instructions 3 Specific installer safety instructions Always observe the following safety instructions and regulations. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation. CAUTION Appliance not accessible to the general public, install it in a secured area, protected from easy access. - Page 15 Specific installer safety instructions WARNING NEVER remove the spun piping by brazing. Any gas or oil remaining inside the stop valve may blow off the spun piping. WARNING ▪ ONLY use R410A as refrigerant. Other substances may cause explosions and accidents.
- Page 16 Specific installer safety instructions CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections. ▪ When disconnecting the power supply: disconnect the current-carrying cables first, before separating the earth connection. ▪ The length of the conductors between the power supply stress relief and the terminal block itself must be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.
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Page 17: For The User
For the user RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner 4P482277-1B – 2020.10... -
Page 18: User Safety Instructions
User safety instructions 4 User safety instructions Always observe the following safety instructions and regulations. In this chapter General....................................Instructions for safe operation............................... 4.1 General WARNING If you are NOT sure how to operate the unit, contact your installer. WARNING Children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge can only use this appliance if... -
Page 19: Instructions For Safe Operation
User safety instructions ▪ Units are marked with the following symbol: This means that electrical and electronic products may NOT be mixed with unsorted household waste. Do NOT try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, of oil and of other parts must be done by an authorized installer and must comply with applicable legislation. - Page 20 User safety instructions CAUTION To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the system. WARNING This unit contains electrical and hot parts. WARNING Before operating the unit, be sure the installation has been carried out correctly by an installer.
- Page 21 User safety instructions WARNING ▪ Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electric shock or fire. Contact your dealer. ▪ In case of accidental refrigerant leaks, make sure there are no naked flames.
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Page 22: About The System
About the system 5 About the system The indoor unit part of this VRV 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 23 About the system d User interface (dedicated depending on indoor unit type) e BP box (required to connect Residential Air (RA) or Sky Air (SA) direct expansion (DX) indoor units) f Residential Air (RA) direct expansion (DX) indoor units g User interface (wireless, dedicated depending on indoor unit type) RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner...
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Page 24: User Interface
User interface 6 User interface CAUTION ▪ NEVER touch the internal parts of the controller. ▪ Do NOT remove the front panel. Some parts inside are dangerous to touch and appliance problems may happen. For checking and adjusting the internal parts, contact your dealer. -
Page 25: Before Operation
Before operation 7 Before operation WARNING This unit contains electrical and hot parts. WARNING Before operating the unit, be sure the installation has been carried out correctly by an installer. NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work. -
Page 26: Operation
Operation 8 Operation In this chapter Operation range..................................Operating the system ................................8.2.1 About operating the system ..........................8.2.2 About cooling, heating, fan only, and automatic operation ................. 8.2.3 About the heating operation ..........................8.2.4 To operate the system (WITHOUT cool/heat changeover remote control switch) ..........8.2.5 To operate the system (WITH cool/heat changeover remote control switch)............. -
Page 27: About Cooling, Heating, Fan Only, And Automatic Operation
Operation 8.2.2 About cooling, heating, fan only, and automatic operation ▪ Changeover cannot be made with a user interface whose display shows "change-over under centralised control" (refer to installation and operation manual of the user interface). ▪ When the display "change-over under centralised control"... -
Page 28: To Operate The System (With Cool/Heat Changeover Remote Control Switch)
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. 8.2.5 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... -
Page 29: Using The Dry Program
Operation To adjust For programming temperature, fan speed and air flow direction refer to the operation manual of the user interface. 8.3 Using the dry program 8.3.1 About the dry program ▪ The function of this program is to decrease the humidity in your room with minimal temperature decrease (minimal room cooling). -
Page 30: Adjusting The Air Flow Direction
Operation 3 Press the ON/OFF button of the user interface. Result: The operation lamp lights up and the system starts operating. 4 Press the air flow direction adjust button (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted). Refer to "8.4 Adjusting the air flow direction" [ 30] for details. -
Page 31: Setting The Master User Interface
Operation WARNING Never touch the air outlet or the horizontal blades while the swing flap is in operation. Fingers may become caught or the unit may break down. NOTICE ▪ The movable limit of the flap is changeable. Contact your dealer for details. (only for double-flow, multi-flow, corner, ceiling-suspended and wall-mounted). -
Page 32: Energy Saving And Optimum Operation
Energy saving and optimum operation 9 Energy saving and optimum operation Observe the following precautions to ensure the system operates properly. ▪ Adjust the air outlet properly and avoid direct air flow to room inhabitants. ▪ Adjust the room temperature properly for a comfortable environment. Avoid excessive heating or cooling. -
Page 33: Available Comfort Settings
Energy saving and optimum operation Automatic The refrigerant temperature is set depending on the outdoor ambient conditions. As such adjusting the refrigerant temperature to match the required load (which is also related to the outdoor ambient conditions). E.g., when your system is operating in cooling, you do not need as much cooling under low outdoor ambient temperatures (e.g., 25°C) as under high outdoor ambient temperatures (e.g., 35°C). -
Page 34: Maintenance And Service
Maintenance and service 10 Maintenance and service NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work. WARNING NEVER replace a fuse with a fuse of a wrong ampere ratings or other wires when a fuse blows out. -
Page 35: Maintenance Before A Long Stop Period
Maintenance and service ▪ Turn on the power at least 6 hours before operating the unit in order to ensure smoother operation. As soon as the power is turned on, the user interface display appears. 10.2 Maintenance before a long stop period E.g., at the end of the season. -
Page 36: Recommended Maintenance And Inspection
Maintenance and service ▪ If repairs to the product are necessary within the warranty period, contact your dealer and keep the warranty card at hand. 10.4.2 Recommended maintenance and inspection Since dust collects when using the unit for several years, performance of the unit will deteriorate to some extent. -
Page 37: Shortened Maintenance And Replacement Cycles
Maintenance and service NOTICE ▪ The table indicates main components. Refer to your maintenance and inspection contract for more details. ▪ The table indicates recommended intervals of maintenance cycles. However, in order to keep the unit operational as long as possible, maintenance work may be required sooner. -
Page 38: Troubleshooting
Troubleshooting 11 Troubleshooting If one of the following malfunctions occur, take the measures shown below and contact your dealer. WARNING Stop operation and shut off the power if anything unusual occurs (burning smells etc.). Leaving the unit running under such circumstances may cause breakage, electric shock or fire. -
Page 39: 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 40 Troubleshooting Main code Contents External protection device was activated EEPROM failure (indoor) Drain system malfunction (indoor) Fan motor malfunction (indoor) Swing flap motor malfunction (indoor) Expansion valve malfunction (indoor) Drain malfunction (indoor unit) Filter dust chamber malfunction (indoor) Capacity setting malfunction (indoor) Transmission malfunction between main PCB and sub PCB (indoor) Heat exchanger thermistor malfunction (indoor;...
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Page 41: Symptoms That Are Not System Malfunctions
Troubleshooting Main code Contents Liquid temperature sensor (after subcool HE) malfunction (outdoor) Gas temperature sensor (after subcool HE) malfunction (outdoor) High pressure sensor malfunction (S1NPH) Low pressure sensor malfunction (S1NPL) INV PCB abnormal Fin temperature abnormal Inverter PCB faulty Compressor over current detected Compressor lock (startup) Transmission outdoor unit - inverter: INV transmission trouble INV unbalanced power supply voltage... -
Page 42: Symptom: Cool/Heat Cannot Be Changed Over
Troubleshooting starts 5 minutes after it is turned ON again in case it was turned OFF just before. The same starting delay occurs after the operation mode selector button was used. ▪ If "Under Centralized Control" is displayed on the user interface, pressing the operation button causes the display to blink for a few seconds. -
Page 43: Symptom: The User Interface Reads "U4" Or "U5" And Stops, But Then Restarts After A Few Minutes
Troubleshooting 11.2.8 Symptom: The user interface reads "U4" or "U5" and stops, but then restarts after a few minutes This is because the user interface is intercepting noise from electric appliances other than the air conditioner. The noise prevents communication between the units, causing them to stop. -
Page 44: Symptom: The Compressor In The Outdoor Unit Does Not Stop After A Short Heating Operation
Troubleshooting 11.2.15 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. 11.2.16 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 45: Relocation
Relocation 12 Relocation Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise. RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner 4P482277-1B – 2020.10... -
Page 46: Disposal
Disposal 13 Disposal This unit uses hydrofluorocarbon. Contact your dealer when discarding this unit. NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. -
Page 47: 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 48: For The Installer
For the installer RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner 4P482277-1B – 2020.10... -
Page 49: About The Box
15.3.3 To remove the accessories from the outdoor unit ....................15.1 About LOOP BY DAIKIN is part of Daikin's wider commitment to reduce our environmental footprint. With we want to create a circular economy for refrigerants. One of the actions to achieve this, is the reuse of reclaimed refrigerant in VRV units produced and sold in Europe. -
Page 50: Outdoor Unit
About the box 15.3 Outdoor unit 15.3.1 To unpack the outdoor unit 15.3.2 To handle the outdoor unit CAUTION To avoid injury, do NOT touch the air inlet or aluminium fins of the unit. Carry the unit slowly as shown: Forklift. -
Page 51: To Remove The Accessories From The Outdoor Unit
About the box 15.3.3 To remove the accessories from the outdoor unit 1 Remove the service cover. See "To open the outdoor unit" [ 62]. 2 Remove the accessories. 1× 1× 1× 1× 1× 1× 1× a General safety precautions b Outdoor unit installation and operation manual c Fluorinated greenhouse gases label d Multilingual fluorinated greenhouse gases label e Gas piping accessory 1 + copper gasket (only for RXYSQ6) -
Page 52: About The Units And Options
About the units and options 16 About the units and options In this chapter 16.1 Overview: About the units and options ..........................16.2 Identification................................... 16.2.1 Identification label: Outdoor unit .......................... 16.3 About the outdoor unit ................................16.4 System layout..................................16.5 Combining units and options.............................. -
Page 53: About The Outdoor Unit
About the units and options Code Explanation VRV IV series Power supply European market Minor model change indication 16.3 About the outdoor unit This installation manual concerns the VRV, full inverter driven, heat pump system. These units are intended for outdoor installation and aimed for air to air heat pump applications. -
Page 54: Combining Units And Options
About the units and options 16.5 Combining units and options INFORMATION Certain options might not be available in your country. 16.5.1 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 the VRV heat pump. - Page 55 About the units and options Description Model name Refnet joint KHRQ22M20T For the selection of the optimal branching kit, please refer to "To select refrigerant branch kits" [ 69]. Cool/heat selector In order to control the cooling or heating operation from a central location, the following option can be connected: Description RXYSQ4~6_V...
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Page 56: Unit Installation
Unit installation 17 Unit installation In this chapter 17.1 Preparing the installation site ..............................17.1.1 Installation site requirements of the outdoor unit ....................17.1.2 Additional installation site requirements of the outdoor unit in cold climates ........... 17.1.3 Securing safety against refrigerant leaks....................... 17.2 Opening and closing the unit .............................. - Page 57 Unit installation (mm) a Personal computer or radio b Fuse c Earth leakage protector d User interface e Indoor unit f Outdoor unit ▪ In places with weak reception, keep distances of 3 m or more to avoid electromagnetic disturbance of other equipment and use conduit tubes for power and transmission lines.
- Page 58 Unit installation ▪ Height of windbreaker≥1.5×height of outdoor unit ▪ Mind the service space requirements when installing the windbreaker. a Sea wind b Building c Outdoor unit d Windbreaker Strong winds (≥18 km/h) blowing against the outdoor unit’s air outlet causes short circuit (suction of discharge air).
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Page 59: Additional Installation Site Requirements Of The Outdoor Unit In Cold Climates
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 60: Securing Safety Against Refrigerant Leaks
Unit installation 17.1.3 Securing safety against refrigerant leaks About safety against refrigerant leaks The installer and system specialist shall secure safety against leakage according to local regulations or standards. The following standards may be applicable if local regulations are not available. This system uses R410A as refrigerant. -
Page 61: Opening And Closing The Unit
Unit installation NOTICE Where a single refrigerant facility is divided into 2 entirely independent refrigerant systems, use the amount of refrigerant with which each separate system is charged. 2 Calculate the volume of the room (m ) where the indoor unit is installed. In a case such as the following, calculate the volume of (D), (E) as a single room or as the smallest room. -
Page 62: To Open The Outdoor Unit
Unit installation ▪ When connecting the electrical wiring ▪ When maintaining or servicing the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. 17.2.2 To open the outdoor unit DANGER: RISK OF ELECTROCUTION DANGER: RISK OF BURNING/SCALDING 45°~90°... -
Page 63: Mounting The Outdoor Unit
Unit installation 17.3 Mounting the outdoor unit 17.3.1 About mounting the outdoor unit Typical workflow Mounting the outdoor unit typically consists of the following stages: Providing the installation structure. Installing the outdoor unit. Providing drainage. Preventing the unit from falling over. 17.3.2 Precautions when mounting the outdoor unit INFORMATION Also read the precautions and requirements in the following chapters:... -
Page 64: To Install The Outdoor Unit
Unit installation NOTICE Fix the outdoor unit to the foundation bolts using nuts with resin washers (a). If the coating on the fastening area is stripped off, the metal can rust easily. 17.3.4 To install the outdoor unit 4× M12 17.3.5 To provide drainage ▪... -
Page 65: To Prevent The Outdoor Unit From Falling Over
Unit installation Drain holes (dimensions in mm) a Drain holes 17.3.6 To prevent the outdoor unit from falling over In case the unit is installed in places where strong wind can tilt the unit, take following measure: 1 Prepare 2 cables as indicated in the following illustration (field supply). 2 Place the 2 cables over the outdoor unit. -
Page 66: Piping Installation
Piping installation 18 Piping installation In this chapter 18.1 Preparing refrigerant piping ..............................18.1.1 Refrigerant piping requirements ........................... 18.1.2 Refrigerant piping material ............................ 18.1.3 To select the piping size ............................18.1.4 To select refrigerant branch kits..........................18.1.5 Refrigerant piping length and height difference ....................18.2 Connecting the refrigerant piping............................ -
Page 67: Refrigerant Piping Material
Piping installation ▪ Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/10 m. 18.1.2 Refrigerant piping material ▪ Piping material: Phosphoric acid deoxidised seamless copper. ▪ Flare connections: Only use annealed material. ▪ Piping temper grade and thickness: Outer diameter (Ø) Temper grade Thickness (t) Ø... - Page 68 Piping installation 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. ▪ Use the suitable adapters for the change-over from inch to mm pipes (field supply).
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Page 69: To Select Refrigerant Branch Kits
Piping installation D: Piping between refrigerant branch kit and BP unit Total capacity index of Piping outer diameter size (mm) connected indoor units Gas pipe Liquid pipe 15~62 12.7 63~149 15.9 150~182 19.1 E: Piping between BP unit and RA DX indoor unit Indoor unit capacity index Piping outer diameter size (mm) Gas pipe... -
Page 70: Refrigerant Piping Length And Height Difference
Piping installation 18.1.5 Refrigerant piping length and height difference The piping lengths and height differences must comply with the following requirements. Two patterns will be discussed: • Outdoor with 100% VRV DX indoor units • Outdoor with 100% RA DX indoor units Requirement Limit VRV DX... -
Page 71: Connecting The Refrigerant Piping
Piping installation 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 Refnet joint Refnet header BP box... -
Page 72: Precautions When Connecting The Refrigerant Piping
Piping installation 18.2.2 Precautions when connecting the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ General safety precautions ▪ Preparation DANGER: RISK OF BURNING/SCALDING NOTICE Take the following precautions on refrigerant piping into account: ▪... -
Page 73: Pipe Bending Guidelines
Piping installation ▪ ALWAYS use a spanner and torque wrench together to tighten the flare nut when connecting the piping. This to prevent nut cracking and leaks. a Torque wrench b Spanner c Piping union d Flare nut Piping size (mm) Tightening torque Flare dimensions Flare shape (mm) -
Page 74: To Braze The Pipe End
Piping installation Flare tool for R410A Conventional flare tool (clutch type) Clutch type Wing nut type (Ridgid-type) (Imperial-type) 0~0.5 mm 1.0~1.5 mm 1.5~2.0 mm 5 Check that the flaring is properly made. a Flare’s inner surface MUST be flawless. b The pipe end MUST be evenly flared in a perfect circle. c Make sure the flare nut is fitted. -
Page 75: Using The Stop Valve And Service Port
Piping installation 18.2.7 Using the stop valve and service port To handle the stop valve Take the following guidelines into account: ▪ Make sure to keep all stop valves open during operation. ▪ The gas and liquid stop valves are factory closed. ▪... -
Page 76: To Connect The Refrigerant Piping To The Outdoor Unit
Piping installation To handle the service port ▪ Always use a charge hose equipped with a valve depressor pin, since the service port is a Schrader type valve. ▪ After handling the service port, make sure to tighten the service port cover securely. - Page 77 Piping installation INFORMATION ▪ Remove the knockout hole (a) in the bottom plate or cover plate by tapping on the attachment points with a flat head screwdriver and a hammer. ▪ Optionally, cut out the slits (b) with a metal saw. NOTICE Precautions when making knockout holes: ▪...
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Page 78: To Connect The Refrigerant Branching Kit
Piping installation Possibility 3: To the side Possibility 4: Downwards d e1 e f c, c1 Gas piping accessory 1 + copper gasket (always use it) d Gas piping accessory 2 e, e1 Gas piping accessory 3 (cut it to the required length) f Field supply 4 Reattach the service cover and the piping intake plate. -
Page 79: Checking The Refrigerant Piping
Piping installation a Horizontal surface b Refnet joint mounted vertically c Refnet joint mounted horizontally 18.3 Checking the refrigerant piping 18.3.1 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? -
Page 80: Checking Refrigerant Piping: General Guidelines
Piping installation DANGER: RISK OF ELECTROCUTION NOTICE Make sure that all indoor units connected to the outdoor unit are powered on. NOTICE Wait to apply setting [2‑21] until the outdoor unit has finished the initialisation. Leak test and vacuum drying Checking the refrigerant piping involves: ▪... -
Page 81: Checking Refrigerant Piping: Setup
Piping installation 18.3.3 Checking refrigerant piping: Setup p < p > a Pressure reducing valve b Nitrogen c Weighing scales d Refrigerant R410A tank (siphon system) e Vacuum pump f Liquid line stop valve g Gas line stop valve A Valve A B Valve B C Valve C Valve... -
Page 82: To Perform Vacuum Drying
Piping installation NOTICE ALWAYS use a recommended bubble test solution from your wholesaler. NEVER use soap water: ▪ Soap water may cause cracking of components, such as flare nuts or stop valve caps. ▪ Soap water may contain salt, which absorbs moisture that will freeze when the piping gets cold. -
Page 83: Charging Refrigerant
Piping installation ▪ Use heat resistant polyethylene foam which can withstand a temperature of 70°C for liquid piping and polyethylene foam which can withstand a temperature of 120°C for gas piping. ▪ Reinforce the insulation on the refrigerant piping according to the installation environment. -
Page 84: To Determine The Additional Refrigerant Amount
Piping installation NOTICE If the power of some units is turned off, the charging procedure cannot be finished properly. NOTICE Be sure to turn ON the power 6 hours before operation in order to have power running to the crankcase heater and to protect the compressor. NOTICE If operation is performed within 12 minutes after the indoor and outdoor units are powered on, the compressor will not operate before the communication is... -
Page 85: To Charge Refrigerant
Piping installation Inch piping Metric piping Piping Weight factor Piping Weight factor Ø6.4 mm 0.022 Ø6 mm 0.018 Ø9.5 mm 0.059 Ø10 mm 0.065 Connection ratio requirements. When selecting indoor units, the connection ratio must comply with the following requirements. For more information, see the technical engineering data. - Page 86 Piping installation Then The determined additional refrigerant Disconnect the manifold from the amount is reached liquid line. You do not have to perform the "Charging refrigerant (in manual additional refrigerant charge mode)" instructions. Too much refrigerant is charged Recover refrigerant. Disconnect the manifold from the liquid line.
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Page 87: Error Codes When Charging Refrigerant
Piping installation 9 Activate setting [2‑20] to start the manual additional refrigerant charge mode. For details, see Mode 2: Field settings. Result: The unit will start operation. INFORMATION The manual refrigerant charge operation will automatically stop within 30 minutes. If charging is not completed after 30 minutes, perform the additional refrigerant charging operation again. - Page 88 Piping installation a If a multilingual fluorinated greenhouse gases label is delivered with the unit (see accessories), peel off the applicable language and stick it on top of a. b Factory refrigerant charge: see unit name plate c Additional refrigerant amount charged d Total refrigerant charge e Quantity of fluorinated greenhouse gases of the total refrigerant charge expressed as tonnes CO...
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Page 89: Electrical Installation
Electrical installation 19 Electrical installation In this chapter 19.1 About connecting the electrical wiring ..........................19.1.1 Precautions when connecting the electrical wiring ....................19.1.2 Field wiring: Overview............................19.1.3 Guidelines when knocking out knockout holes ..................... 19.1.4 Guidelines when connecting the electrical wiring ....................19.1.5 About electrical compliance .......................... - Page 90 Electrical installation WARNING ▪ If the power supply has a missing or wrong N-phase, equipment might break down. ▪ Establish proper earthing. Do NOT earth the unit to a utility pipe, surge absorber, or telephone earth. Incomplete earthing may cause electrical shock. ▪...
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Page 91: Field Wiring: Overview
Electrical installation 19.1.2 Field wiring: Overview Field wiring consists of: ▪ power supply (including earth), ▪ DIII transmission wiring between communication box and outdoor unit, ▪ RS‑485 transmission wiring between communication box and monitoring system. NOTICE ▪ Be sure to keep the power line and transmission line apart from each other. Transmission wiring and power supply wiring may cross, but may NOT run parallel. -
Page 92: Guidelines When Knocking Out Knockout Holes
Electrical installation 220-240 V 380-415 V 220-240 V 1~ 50 Hz 3N~ 50 Hz 1~ 50 Hz F1/F2 (16 V) F1/F2 (16 V) a Main switch b Earth connection c Power supply wiring (including earth) (shielded cable) F1/F2 Transmission wiring (shielded cable) V Outdoor unit (RXYSQ4~6_V) Y Outdoor unit (RXYSQ4~6_Y) d Indoor unit... -
Page 93: About Electrical Compliance
Electrical installation Wire type Installation method Single-core wire AA´ A´ a Curled single-core wire b Screw c Flat washer Stranded conductor wire with round crimp-style terminal a Terminal b Screw c Flat washer Allowed NOT allowed Tightening torques Wiring Screw size Tightening torque (N•m) Power supply wiring... -
Page 94: To Connect The Electrical Wiring To The Outdoor Unit
Electrical installation Model Minimum circuit Recommended Power supply ampacity fuses RXYSQ4_V 29.1 A 32 A 1~ 50 Hz 220-240 V RXYSQ5_V RXYSQ6_V RXYSQ4_Y 14.1 A 16 A 3N~ 50 Hz 380-415 V RXYSQ5_Y RXYSQ6_Y Transmission wiring Transmission wiring specification and limits Vinyl cords with 0.75 to 1.25 mm² sheath or cables (2‑core wires) Maximum number of branches for unit-to-unit cabling Maximum wiring length 300 m... - Page 95 Electrical installation TO IN/D TO OUT/D F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 F1 F2 a Use the conductor of sheathed wire (2 wire) (no polarity) b Terminal board (field supply) NOTICE You must use shielded wire and connect the earth to the transmission terminal (X2M).
- Page 96 Electrical installation a Cable tie b Attachment plate X1M Power supply X2M Transmission wiring 6 Route the wiring through the frame and connect it to it. Routing through the frame a Power supply cable b Transmission wiring cable RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner 4P482277-1B –...
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Page 97: To Finish The Transmission Wiring
Electrical installation Connecting to the When cables are routed from the unit, a protection frame sleeve for the conduits (PG insertions) can be inserted at the knockout hole. When you do not use a wire conduit, protect the wires with vinyl tubes to prevent the edge of the knockout hole from cutting the wires. -
Page 98: To Check The Insulation Resistance Of The Compressor
Electrical installation 19.4 To check the insulation resistance of the compressor NOTICE If, after installation, refrigerant accumulates in the compressor, the insulation resistance over the poles can drop, but if it is at least 1 MΩ, then the unit will not break down. -
Page 99: Configuration
Configuration 20 Configuration In this chapter 20.1 Overview: Configuration................................. 20.2 Making field settings................................20.2.1 About making field settings ........................... 20.2.2 To access the field setting components ........................ 100 20.2.3 Field setting components............................100 20.2.4 To access mode 1 or 2............................101 20.2.5 To use mode 1................................ -
Page 100: To Access The Field Setting Components
Configuration 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. See also: "To connect the PC configurator to the outdoor unit" [... -
Page 101: To Access Mode 1 Or 2
Configuration DIP switches Only change the factory settings if you install a cool/heat selector switch. DS1‑1 COOL/HEAT selector (refer to the manual of the cool/heat selector switch). OFF=not installed=factory setting DS1‑2 NOT USED. DO NOT CHANGE THE FACTORY SETTING. Push buttons Use the push buttons to make the field settings. -
Page 102: To Use Mode 1
Configuration Turn on the power supply of the outdoor unit and all indoor units. When the communication between indoor units and outdoor unit is established and normal, the display indication state will be as below (default situation when shipped from factory). -
Page 103: To Use Mode 2
Configuration Action Button/display Check the status of LED H6P. H6P OFF: Unit is currently not operating under low noise restrictions. H6P ON: Unit is currently operating under low noise restrictions. Example: 7‑LEDs display – Mode 1 You can read out setting [1‑5] (= the total number of connected indoor units) as follows: Action Button/display... -
Page 104: Mode 1: Monitoring Settings
Configuration Action Button/display BS3 [1×] Select value 4 (= 8°C). a: Display the current value. BS2 [X×] b: Change to 4. ("X×" depends on BS3 [1×] the current value, and the value that you want to select.) BS3 [1×] c: Enter the value in the system. d: Confirm. - Page 105 Configuration Setting Value Description (= binary) [2‑18] Deactivated. Fan high static pressure setting. (default) In order to increase the static pressure the outdoor Activated. unit fan is delivering, this setting should be activated. For details about this setting, see technical specifications.
- Page 106 Configuration Setting Value Description (= binary) [2‑25] Level 1 Level 3<Level 2<Level 1 Low noise operation level via the external control Level 2 adaptor. (default) If the system needs to be running under low noise Level 3 operation conditions when an external signal is sent to the unit, this setting defines the level of low noise that will be applied.
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Page 107: To Connect The Pc Configurator To The Outdoor Unit
Configuration Setting Value Description (= binary) [2‑38] VRV DX indoor units installed Type of indoor units (default) After changing this setting, you have to power OFF RA DX indoor units installed the system, wait for 20 s, and then power ON again. If not, the setting will not be processed and malfunction codes might occur. -
Page 108: Energy Saving And Optimum Operation
Configuration 20.3 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. Several parameters can be selected, resulting in the optimal balance between energy consumption and comfort for the particular application. -
Page 109: Available Comfort Settings
Configuration For details concerning to Hi-sensible applications, please contact your dealer. To activate this in… Change… Cooling operation [2‑8] to the appropriate value, matching the requirements of the pre-designed system containing a high sensible solution. Heating operation [2‑9] to the appropriate value, matching the requirements of the pre-designed system containing a high sensible solution. - Page 110 Configuration Quick 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 6°C on temporary base depending on the situation.
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Page 111: Example: Automatic Mode During Cooling
Configuration To activate this in… Change… Cooling operation [2‑41]=0. This setting is used in conjunction with setting [2‑8]. Heating operation [2‑42]=0. This setting is used in conjunction with setting [2‑9]. 20.3.3 Example: Automatic mode during cooling 100% 6°C 3°C 35°C A Actual load curve B Virtual load curve (initial capacity automatic mode) C Virtual target value (initial evaporation temperature value automatic mode) -
Page 112: Example: Automatic Mode During Heating
Configuration Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful 20.3.4 Example: Automatic mode during heating 100% 49°C 46°C 2°C A Virtual load curve (default automatic mode peak capacity) B Load curve C Virtual target value (initial condensation temperature value automatic mode) D Design temperature... - Page 113 Configuration Quick Powerful Mild Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner 4P482277-1B – 2020.10...
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Page 114: Commissioning
Commissioning 21 Commissioning In this chapter 21.1 Precautions when commissioning............................114 21.2 Checklist before commissioning............................. 114 21.3 Checklist during commissioning ............................. 116 21.4 About the test run .................................. 116 21.5 To perform a test run (7-segment display) ..........................116 21.6 Correcting after abnormal completion of the test run...................... - Page 115 Commissioning You read the complete installation and operation instructions, as described in the installer and user reference guide. Installation Check that the unit is properly installed, to avoid abnormal noises and vibrations when starting up the unit. Field wiring Be sure that the field wiring has been carried out according to the instructions described in the chapter Connecting the electrical wiring, according to the wiring diagrams and according to the applicable legislation.
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Page 116: Checklist During Commissioning
Commissioning 21.3 Checklist during commissioning To perform a test run. 21.4 About the test run NOTICE Make sure to carry out the test run after the first installation. Otherwise, the malfunction code will be displayed on the user interface and normal operation or individual indoor unit test run cannot be carried out. -
Page 117: Operating The Unit
Commissioning 21.7 Operating the unit Once the unit is installed and test operation of outdoor unit and indoor units is finished, the operation of the system can start. For operating the indoor unit, the user interface of the indoor unit should be switched ON. -
Page 118: Hand-Over To The User
Hand-over to the user 22 Hand-over to the user Once the test run is finished and the unit operates properly, please make sure the following is clear for the user: ▪ Make sure that the user has the printed documentation and ask him/her to keep it for future reference. -
Page 119: Maintenance And Service
Maintenance and service 23 Maintenance and service NOTICE Maintenance MUST be done by an authorized installer or service agent. We recommend performing maintenance at least once a year. However, applicable legislation might require shorter maintenance intervals. NOTICE Applicable legislation on fluorinated greenhouse gases requires that the refrigerant charge of the unit is indicated both in weight and CO equivalent. -
Page 120: Checklist For Yearly Maintenance Of The Outdoor Unit
Maintenance and service C– C– 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 for the fan motors in the outdoor unit before starting service operation on the inverter equipment. -
Page 121: To Use Vacuum Mode
Maintenance and service 23.3.1 To use vacuum mode 1 When the unit is at standstill, activate setting [2‑21] to start vacuuming mode. Result: When confirmed, the indoor and outdoor unit expansion valves will fully open. At that moment H1P lights and the user interface of all indoor units indicate TEST (test operation) and (external control) and the operation will be prohibited. -
Page 122: Troubleshooting
Troubleshooting 24 Troubleshooting In this chapter 24.1 Overview: Troubleshooting ..............................122 24.2 Precautions when troubleshooting............................122 24.3 Solving problems based on error codes..........................122 24.3.1 Error codes: Overview............................123 24.1 Overview: Troubleshooting Before troubleshooting Carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring. -
Page 123: Error Codes: Overview
Troubleshooting INFORMATION If a malfunction occurs, the error code is displayed on the outdoor unit's 7‑segments display and on the user interface of the indoor unit. 24.3.1 Error codes: Overview In case other error codes appear, contact your dealer. Main code Cause Solution ▪... - Page 124 Troubleshooting Main code Cause Solution Liquid temperature sensor (after subcool HE) Check connection on PCB or actuator. malfunction (R7T) - A1P (X13A) Gas temperature sensor (after subcool HE) Check connection on PCB or actuator. malfunction (R6T) - A1P (X13A) High pressure sensor malfunction (S1NPH): Check connection on PCB or actuator.
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Page 125: Disposal
Disposal 25 Disposal NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. RXYSQ4~6T8V/YB Installer and user reference guide VRV IV-S system air conditioner... -
Page 126: Technical Data
Technical data 26 Technical data A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set of latest technical data is available on the Daikin Business Portal (authentication required). In this chapter 26.1... -
Page 127: Service Space: Outdoor Unit
Technical data 26.1 Service space: Outdoor unit When mounting units side by side, the piping route must be to the front, to the back or downwards. In this case the piping route to the side is not possible. When mounting the units side by side and routing the piping to the back, you must keep a distance of ≥250 mm between the units (instead of ≥100 mm as shown on the figures below). - Page 128 Technical data Multiple rows of units ( b (mm) ≥100 ≥100 ≤½H b≥250 ½H <H ≤H b≥300 ≥100 ≥100 ≥100 >H ≥2000 ≥3000 ≥100 ≥200 ≥100 ≥1000 ≥600 ≥1500 Stacked units (max. 2 levels) ( ≥100 ≥100 ≥300 ≥1000 ≥100 ≥100 ≥100 ≥100...
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Page 129: Piping Diagram: Outdoor Unit
Technical data 26.2 Piping diagram: Outdoor unit S1NPH S1PH S1NPL a Stop valve (gas) b Stop valve (liquid) c Filter (3×) d Subcool heat exchanger e Pressure regulating valve f Heat exchanger g Service port (high pressure) h Check valve i Compressor accumulator j Capillary tube k Service port (refrigerant charge) -
Page 130: Wiring Diagram: Outdoor Unit
Technical data 26.3 Wiring diagram: Outdoor unit The wiring diagram is delivered with the unit, located at the inside of the service cover. Notes for RXYSQ4~6_V: Symbols (see below). For X37A refer to the installation manual of the option. Refer to the installation or service manual on how to use BS1~BS5 push buttons, and DS1‑1 and DS1‑2 DIP switches. - Page 131 Technical data Printed circuit board (cool/heat selector) (option) Push buttons (mode, set, return, test, reset) (A1P) Capacitor (A1P) DIP switch (A1P) Fuse (T 56 A / 250 V) (A2P) F3U, F4U Fuse (T 6.3 A / 250 V) (A2P) Fuse (T 5.0 A / 250 V) (A1P) LED (service monitor orange) (A1P) Running LED (service monitor green) (A1P) Frequency LED (service monitor green) (A1P)
- Page 132 Technical data Connector X37A Connector (power supply for option PCB) Electronic expansion valve (main) Electronic expansion valve (subcool heat exchanger) Solenoid valve (4‑way valve) Noise filter (ferrite core) Z*F (A*P) Noise filter Legend for wiring diagram RXYSQ4~6_Y: Printed circuit board (main) Printed circuit board (inverter) Push buttons (mode, set, return, test, reset) (A1P) Capacitor (A2P)
- Page 133 Technical data Air control switch (option) Cool/heat selector switch (option) IGBT power module (A2P) V2R, V3R Diode module (A2P) PCB connector Terminal strip Connector X37A Connector (power supply for option PCB) Electronic expansion valve (main) Electronic expansion valve (subcool heat exchanger) Solenoid valve (4‑way valve) Noise filter (ferrite core) Noise filter...
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Page 134: Glossary
Optional equipment Equipment made or approved by Daikin that can be combined with the product according to the instructions in the accompanying documentation. Field supply Equipment NOT made by Daikin that can be combined with the product according to the instructions in the accompanying documentation. - Page 136 4P482277-1B 2020.10 Verantwortung für Energie und Umwelt...