Daikin VRV IV RKXYQ5T8Y1B Installer And User Reference Manual
Heat pump for indoor installation
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Summary of Contents for Daikin VRV IV RKXYQ5T8Y1B
- Page 1 Installer and user reference guide VRV IV heat pump for indoor installation RKXYQ5T8Y1B RDXYQ5T8V1B RKXYQ8T7Y1B RDXYQ8T7V1B...
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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 ............................... 10 2.1.3 Refrigerant — in case of R410A or R32......................10 2.1.4 Electrical ................................. - Page 3 11.2.18 Symptom: Hot air can be felt when the indoor unit is stopped..............45 12 Relocation 13 Disposal For the installer 14 About the box 14.1 About LOOP BY DAIKIN ..............................49 14.2 Overview: About the box ..............................49 14.3 Compressor unit................................50 14.3.1 To unpack the compressor unit ........................
- Page 4 Table of Contents 17.1.3 To select the piping size ..........................73 17.1.4 To select refrigerant branch kits ........................75 17.1.5 Refrigerant piping length and height difference ................... 75 17.2 Connecting the refrigerant piping ..........................77 17.2.1 About connecting the refrigerant piping ....................... 77 17.2.2 Precautions when connecting the refrigerant piping..................
- Page 5 Table of Contents 20.4.5 Operating the unit ............................134 21 Hand-over to the user 22 Maintenance and service 22.1 Overview: Maintenance and service ..........................136 22.2 Maintenance safety precautions............................ 136 22.2.1 To prevent electrical hazards ......................... 136 22.3 Checklist for yearly maintenance of the heat exchanger unit ..................137 22.4 About service mode operation............................
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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: Meaning Of Warnings And Symbols
About the documentation 1.2 Meaning of warnings and symbols DANGER Indicates a situation that results in death or serious injury. DANGER: RISK OF ELECTROCUTION Indicates a situation that could result in electrocution. DANGER: RISK OF BURNING/SCALDING Indicates a situation that could result in burning/scalding because of extreme hot or cold temperatures. - Page 8 About the documentation Symbol Explanation Indicates a table title or a reference to it. Example: " 1–3 Table title" means "Table 3 in chapter 1". RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1A –...
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Page 9: General Safety Precautions
Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. Only use accessories, optional equipment and spare parts made or approved by Daikin. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). -
Page 10: Installation Site
General safety precautions CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. NOTICE Works executed on the outdoor unit are best done under dry weather conditions to avoid water ingress. - Page 11 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 12: Electrical
General safety precautions Then A siphon tube is present Charge with the cylinder upright. (i.e., the cylinder is marked with "Liquid filling siphon attached") A siphon tube is NOT present Charge with the cylinder upside down. ▪ Open refrigerant cylinders slowly. ▪... - Page 13 General safety precautions WARNING ▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the applicable legislation. ▪ All field wiring MUST be performed in accordance with the wiring diagram supplied with the product. ▪ NEVER squeeze bundled cables and make sure they do NOT come in contact with the piping and sharp edges.
- Page 14 General safety precautions WARNING ▪ After finishing the electrical work, confirm that each electrical component and terminal inside the electrical components box is connected securely. ▪ Make sure all covers are closed before starting up the unit. NOTICE Only applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method.
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Page 15: Specific Installer Safety Instructions
Specific installer safety instructions 3 Specific installer safety instructions Always observe the following safety instructions and regulations. WARNING Tear apart and throw away plastic packaging bags so that nobody, especially children, can play with them. Possible risk: suffocation. CAUTION Appliance not accessible to the general public, install it in a secured area, protected from easy access. - Page 16 Specific installer safety instructions WARNING NEVER remove the spun piping by brazing. Any gas or oil remaining inside the stop valve may blow off the spun piping. WARNING ▪ ONLY use R410A as refrigerant. Other substances may cause explosions and accidents.
- Page 17 Specific installer safety instructions CAUTION ▪ When connecting the power supply: connect the earth cable first, before making the current-carrying connections. ▪ When disconnecting the power supply: disconnect the current-carrying cables first, before separating the earth connection. ▪ The length of the conductors between the power supply stress relief and the terminal block itself must be as such that the current-carrying wires are tautened before the earth wire is in case the power supply is pulled loose from the stress relief.
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Page 18: For The User
For the user RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1A – 2020.10... -
Page 19: User Safety Instructions
User safety instructions 4 User safety instructions Always observe the following safety instructions and regulations. In this chapter General....................................Instructions for safe operation............................... 4.1 General WARNING If you are NOT sure how to operate the unit, contact your installer. WARNING 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 20: Instructions For Safe Operation
User safety instructions ▪ Units are marked with the following symbol: This means that electrical and electronic products may NOT be mixed with unsorted household waste. Do NOT try to dismantle the system yourself: the dismantling of the system, treatment of the refrigerant, of oil and of other parts must be done by an authorized installer and must comply with applicable legislation. - Page 21 User safety instructions CAUTION To avoid oxygen deficiency, ventilate the room sufficiently if equipment with burner is used together with the system. WARNING This unit contains electrical and hot parts. WARNING Before operating the unit, be sure the installation has been carried out correctly by an installer.
- Page 22 User safety instructions WARNING ▪ Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an 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 23: About The System
About the system 5 About the system The VRV IV heat pump for indoor installation can be used for heating/cooling applications. NOTICE Do NOT use the system for other purposes. In order to avoid any quality deterioration, do NOT use the unit for cooling precision instruments, food, plants, animals, or works of art. -
Page 24: User Interface
User interface 6 User interface CAUTION ▪ NEVER touch the internal parts of the controller. ▪ Do NOT remove the front panel. Some parts inside are dangerous to touch and appliance problems may happen. For checking and adjusting the internal parts, contact your dealer. -
Page 25: 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 ▪ When stopping the unit, the unit might still operate for a few minutes. This is not a malfunction. 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"... -
Page 28: To Operate The System (Without Cool/Heat Changeover Remote Control Switch)
Operation INFORMATION ▪ The heating capacity drops when the outside temperature falls. If this happens, use another heating device together with the unit. (When using together with appliances that produce open fire, ventilate the room constantly). Do not place appliances that produce open fire in places exposed to the air flow from the unit or under the unit. -
Page 29: Using The Dry Program
Operation Cooling operation Heating operation Fan only operation 2 Press the ON/OFF button on the user interface. Result: The operation lamp lights up and the system starts operating. To stop 3 Press the ON/OFF button on the user interface once again. Result: The operation lamp goes out and the system stops operating. -
Page 30: To Use The Dry Program (With Cool/Heat Changeover Remote Control Switch)
Operation To stop 4 Press the ON/OFF button on the user interface once again. Result: The operation lamp goes out and the system stops operating. NOTICE Do not turn off power immediately after the unit stops, but wait for at least 5 minutes. -
Page 31: Setting The Master User Interface
Operation Ceiling suspended units Wall-mounted units For the following conditions, a micro computer controls the air flow direction which may be different from the display. Cooling Heating ▪ When the room temperature is lower ▪ When starting operation. than the set temperature. ▪... -
Page 32: To Designate The Master User Interface (Vrv Dx)
Operation AHU Air handling unit When the system is installed as shown in the figure above, it is necessary to designate one of the user interfaces as the master user interface. The displays of slave user interfaces show (change-over under centralised control) and slave user interfaces automatically follow the operation mode directed by the master user interface. -
Page 33: Energy Saving And Optimum Operation
Energy saving and optimum operation 9 Energy saving and optimum operation Observe the following precautions to ensure the system operates properly. ▪ Adjust the air outlet properly and avoid direct air flow to room inhabitants. ▪ Adjust the room temperature properly for a comfortable environment. Avoid excessive heating or cooling. -
Page 34: Available Comfort Settings
Energy saving and optimum operation Automatic The refrigerant temperature is set depending on the outdoor ambient conditions. As such adjusting the refrigerant temperature to match the required load (which is also related to the outdoor ambient conditions). E.g., when your system is operating in cooling, you do not need as much cooling under low outdoor ambient temperatures (e.g., 25°C) as under high outdoor ambient temperatures (e.g., 35°C). -
Page 35: Maintenance And Service
Maintenance and service 10 Maintenance and service NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work. WARNING NEVER replace a fuse with a fuse of a wrong ampere ratings or other wires when a fuse blows out. -
Page 36: Maintenance Before A Long Stop Period
Maintenance and service ▪ Turn on the power at least 6 hours before operating the unit in order to ensure smoother operation. As soon as the power is turned on, the user interface display appears. 10.2 Maintenance before a long stop period E.g., at the end of the season. -
Page 37: Recommended Maintenance And Inspection
Maintenance and service ▪ If repairs to the product are necessary within the warranty period, contact your dealer and keep the warranty card at hand. 10.4.2 Recommended maintenance and inspection Since dust collects when using the unit for several years, performance of the unit will deteriorate to some extent. -
Page 38: Shortened Maintenance And Replacement Cycles
Maintenance and service NOTICE ▪ The table indicates main components. Refer to your maintenance and inspection contract for more details. ▪ The table indicates recommended intervals of maintenance cycles. However, in order to keep the unit operational as long as possible, maintenance work may be required sooner. -
Page 39: Troubleshooting
Troubleshooting 11 Troubleshooting If one of the following malfunctions occur, take the measures shown below and contact your dealer. WARNING Stop operation and shut off the power if anything unusual occurs (burning smells etc.). Leaving the unit running under such circumstances may cause breakage, electric shock or fire. -
Page 40: Error Codes: Overview
Troubleshooting Malfunction Measure The system operates but ▪ Check if air inlet or outlet of heat exchanger unit cooling or heating is or indoor unit is not blocked by obstacles. Remove insufficient. any obstacle and make it well-ventilated. ▪ Check if the air filter is not clogged (refer to "Maintenance"... - Page 41 Troubleshooting Main code Contents External protection device was activated EEPROM failure (indoor) Drain system malfunction (indoor) Fan motor malfunction (indoor) Swing flap motor malfunction (indoor) Expansion valve malfunction (indoor) Drain malfunction (indoor unit) Filter dust chamber malfunction (indoor) Capacity setting malfunction (indoor) Transmission malfunction between main PCB and sub PCB (indoor) Heat exchanger thermistor malfunction (indoor;...
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Page 42: Symptoms That Are Not System Malfunctions
Troubleshooting Main code Contents De-icing temperature sensor malfunction (heat exchanger unit) Liquid temperature sensor (after subcool HE) malfunction (compressor unit) Gas temperature sensor (after subcool HE) malfunction (compressor unit) High pressure sensor malfunction (BIPH) Low pressure sensor malfunction (BIPL) INV PCB abnormal Fin temperature abnormal Inverter PCB faulty Compressor over current detected... -
Page 43: Symptom: The System Does Not Operate
Troubleshooting 11.2.1 Symptom: The system does not operate ▪ The air conditioner does not start immediately after the ON/OFF button on the user interface is pressed. If the operation lamp lights, the system is in normal condition. To prevent overloading of the compressor motor, the air conditioner starts 5 minutes after it is turned ON again in case it was turned OFF just before. -
Page 44: Symptom: White Mist Comes Out Of A Unit (Indoor Unit, Heat Exchanger Unit)
Troubleshooting 11.2.7 Symptom: White mist comes out of a unit (Indoor unit, heat exchanger unit) When the system is changed over to heating operation after defrost operation. Moisture generated by defrost becomes steam and is exhausted. 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. -
Page 45: Symptom: The Heat Exchanger Unit Fan Does Not Spin
Troubleshooting 11.2.14 Symptom: The heat exchanger unit fan does not spin During operation. The speed of the fan is controlled in order to optimise product operation. 11.2.15 Symptom: The display shows "88" This is the case immediately after the main power supply switch is turned on and means that the user interface is in normal condition. -
Page 46: Relocation
Relocation 12 Relocation Contact your dealer for removing and reinstalling the total unit. Moving units requires technical expertise. RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1A – 2020.10... -
Page 47: Disposal
Disposal 13 Disposal This unit uses hydrofluorocarbon. Contact your dealer when discarding this unit. NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. -
Page 48: For The Installer
For the installer RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1A – 2020.10... -
Page 49: About The Box
14.4.4 To remove the transportation sheet ........................14.1 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: Compressor Unit
About the box 14.3 Compressor unit 14.3.1 To unpack the compressor unit 4× 14.3.2 To handle the compressor unit ▪ With packing. Use a forklift. ▪ Without packing. Carry the unit slowly as shown: 14.3.3 To remove the accessories from the compressor unit 1 Remove the accessories (part 1). -
Page 51: To Remove The Transportation Stay
About the box 5 HP 1× 1× 1× 1× 8 HP 1× 1× 1× 1× 1× a+b Piping accessories for circuit 1 (to the heat exchanger unit) 5 HP 8 HP Ø19.1 mm Ø22.2 mm Liquid Ø12.7 mm Ø12.7 mm c+d Piping accessories for circuit 2 (to the indoor units) 5 HP 8 HP Ø15.9 mm... -
Page 52: Heat Exchanger Unit
About the box 14.4 Heat exchanger unit 14.4.1 To unpack the heat exchanger unit 14.4.2 To handle the heat exchanger unit NOTICE When removing the heat exchanger unit from the pallet, do NOT place the suction or discharge side of the unit on the floor. Possible consequence: Deformation of the suction or discharge opening. -
Page 53: To Remove The Accessories From The Heat Exchanger Unit
About the box ▪ Without packing. Carry the unit slowly as shown: 14.4.3 To remove the accessories from the heat exchanger unit 1× 1× 1× 1× 1× 1× 3× a Optional filter for debris b Heat exchanger unit installation manual c Sealing pad d Drain hose e Metal clamp... -
Page 54: About The Units And Options
About the units and options 15 About the units and options In this chapter 15.1 Overview: About the units and options ..........................15.2 Identification................................... 15.2.1 Identification label: Compressor unit ........................15.2.2 Identification label: Heat exchanger unit ......................15.3 About the compressor unit and heat exchanger unit......................15.4 System layout.................................. -
Page 55: Identification Label: Heat Exchanger Unit
About the units and options Code Explanation Single module Refrigerant R410A Capacity class VRV IV series Power supply European market Minor model change indication 15.2.2 Identification label: Heat exchanger unit Location Model identification Example: R D X Y Q 5 T8 V1 B [*] Code Explanation Outdoor air cooled... -
Page 56: System Layout
About the units and options Specification 5 HP 8 HP Maximum capacity Heating 16.0 kW 25.0 kW Cooling 14.0 kW 22.4 kW Outside ambient design Heating –20~15.5°C WB temperature Cooling –5~46°C DB Ambient design temperature of compressor unit 5~35°C DB and heat exchanger unit Maximum relative Heating humidity around the Cooling compressor unit and heat exchanger unit... -
Page 57: About Combining Units And Options
About the units and options 15.5.1 About combining units and options NOTICE To be sure your system setup (compressor unit+heat exchanger unit+indoor unit(s)) will work, you have to consult the latest technical engineering data for the VRV IV heat pump for indoor installation. The VRV IV heat pump for indoor installation can be combined with several types of indoor units and is intended for R410A use only. - Page 58 About the units and options For the selection of the optimal branching kit, please refer to "To select refrigerant branch kits" [ 75]. External control adaptor (DTA104A61/62) To instruct specific operation with an external input coming from a central control the external control adaptor can be used. Instructions (group or individual) can be instructed for low noise operation and power consumption limitation operation.
- Page 59 About the units and options A B C X66A 5 Connect the cable. X66A 6 Connect the cool/heat selector switch. Tightening torque X1M (A/B/C): 0.53~0.63 N•m A B C KRC19-26A A B C 7 Fix the cables with cable ties. 8 Turn ON the DIP switch (DS1‑1). 1 2 3 4 X66A 9 Reattach the service covers.
- Page 60 About the units and options Filter for debris (delivered as accessory) ▪ When. Installation is optional. It is recommended in places where a lot of debris or dirt (example: leafs) can go into the suction ducting. ▪ Where. Install the filter in one of the following places: Suction opening of the heat exchanger unit Suction ducting (easier for maintenance) ▪...
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Page 61: Unit Installation
Unit installation 16 Unit installation In this chapter 16.1 Preparing the installation site ..............................16.1.1 Installation site requirements of the compressor unit ..................16.1.2 Installation site requirements of the heat exchanger unit..................16.1.3 Securing safety against refrigerant leaks....................... 16.2 Opening the unit..................................16.2.1 About opening the units ............................ - Page 62 Unit installation NOTICE The equipment described in this manual may cause electronic noise generated from radio-frequency energy. The equipment complies to specifications that are designed to provide reasonable protection against such interference. However, there is no guarantee that interference will not occur in a particular installation. It is therefore recommended to install the equipment and electric wires in such a way that they keep a proper distance from stereo equipment, personal computers, etc.
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Page 63: Installation Site Requirements Of The Heat Exchanger Unit
Unit installation ▪ Sound sensitive areas (e.g. near a bedroom), so that the operation noise will cause no trouble. Note: If the sound is measured under actual installation conditions, the measured value might be higher than the sound pressure level mentioned in Sound spectrum in the data book due to environmental noise and sound reflections. -
Page 64: Securing Safety Against Refrigerant Leaks
Unit installation ▪ Seaside installation. Do NOT install directly exposed to seawinds. This is to prevent corrosion caused by high levels of salt in the air, which might shorten the life of the unit. X Not allowed O Allowed a Building (top view) b Discharge ducting c Heat exchanger unit d Suction ducting... - Page 65 Unit installation To check the maximum concentration level Check the maximum concentration level in accordance with steps 1 to 4 below and take whatever action is necessary to comply. 1 Calculate the amount of refrigerant (kg) charged to each system separately. Formula A+B=C Amount of refrigerant in a single unit system (amount...
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Page 66: Opening The Unit
Unit installation 16.2 Opening the unit 16.2.1 About opening the units At certain times, you have to open the unit. Example: ▪ When connecting the refrigerant piping ▪ When connecting the electrical wiring ▪ When maintaining or servicing the unit DANGER: RISK OF ELECTROCUTION Do NOT leave the unit unattended when the service cover is removed. -
Page 67: To Open The Switch Box Cover Of The Heat Exchanger Unit
Unit installation 16.2.3 To open the switch box cover of the heat exchanger unit DANGER: RISK OF ELECTROCUTION 2× 16.3 Mounting the compressor unit 16.3.1 Precautions when mounting the compressor unit INFORMATION Also read the precautions and requirements in the following chapters: ▪... -
Page 68: Mounting The Heat Exchanger Unit
Unit installation a Anchor point (4×) INFORMATION The recommended height of the upper protruding part of the bolts is 20 mm. 16.4 Mounting the heat exchanger unit 16.4.1 Precautions when mounting the heat exchanger unit INFORMATION Also read the precautions and requirements in the following chapters: ▪... -
Page 69: Guidelines When Installing The Ducting
Unit installation 16.4.3 Guidelines when installing the ducting The ducting is to be field supplied. ▪ Slope. Make sure the ducting slopes down to prevent water from flowing into the heat exchanger unit. a Ducting b Heat exchanger unit ▪ Grills. -
Page 70: Guidelines When Installing The Drain Piping
Unit installation 16.4.4 Guidelines when installing the drain piping Make sure condensation water can be evacuated properly. This involves: ▪ General guidelines ▪ Connecting the drain piping to the heat exchanger unit ▪ Installing a drain pump and drain reservoir ▪... - Page 71 Unit installation 3 Wind the sealing pad (= insulation) around the metal clamp and drain hose, and fix it with cable ties. 4 Connect the drain piping to the drain hose. 2+3+4 ≤4 mm A-A' a Drain pipe connection (attached to the unit) b Drain hose (accessory) c Metal clamp (accessory) d Sealing pad (accessory)
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Page 72: Piping Installation
Piping installation 17 Piping installation In this chapter 17.1 Preparing refrigerant piping ..............................17.1.1 Refrigerant piping requirements ........................... 17.1.2 Refrigerant piping material ............................ 17.1.3 To select the piping size ............................17.1.4 To select refrigerant branch kits..........................17.1.5 Refrigerant piping length and height difference ....................17.2 Connecting the refrigerant piping............................ -
Page 73: Refrigerant Piping Material
Piping installation ▪ Foreign materials inside pipes (including oils for fabrication) must be ≤30 mg/10 m. 17.1.2 Refrigerant piping material ▪ Piping material: Phosphoric acid deoxidised seamless copper. ▪ Piping temper grade and thickness: Outer diameter (Ø) Temper grade Thickness (t) Ø 6.4 mm (1/4") Annealed (O) ≥0.80 mm... - Page 74 Piping installation Compressor unit capacity Piping outer diameter size (mm) type Gas pipe Liquid pipe 5 HP 19.1 12.7 8 HP 22.2 B: Piping between compressor unit and first refrigerant branch kit Use the following diameters: Compressor unit capacity Piping outer diameter size (mm) type Gas pipe Liquid pipe...
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Page 75: To Select Refrigerant Branch Kits
Piping installation Indoor unit capacity index Piping outer diameter size (mm) Gas pipe Liquid pipe 63~140 15.9 19.1 22.2 17.1.4 To select refrigerant branch kits For piping example, refer to "To select the piping size" [ 73]. Refnet joint at first branch (counting from the compressor unit) When using refnet joints at the first branch counted from the compressor unit side, choose from the following table in accordance with the capacity of the compressor unit. - Page 76 Piping installation b Compressor unit c Refrigerant branch kit VRV DX VRV DX indoor unit EKEXV Expansion valve kit AHU Air handling unit H1~H5 Height differences L1~L7 Piping lengths Minimum and maximum piping lengths Heat exchanger unit → Compressor L1≤30 m unit Actual piping length (equivalent L2+L3+L4≤70 m (90 m) piping length) L2+L5+L6≤70 m (90 m)
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Page 77: Connecting The Refrigerant Piping
Piping installation 17.2 Connecting the refrigerant piping 17.2.1 About connecting the refrigerant piping Before connecting the refrigerant piping Make sure the compressor unit, heat exchanger unit and indoor units are mounted. Typical workflow Connecting the refrigerant piping involves: ▪ Connecting the refrigerant piping to the compressor unit ▪... -
Page 78: Pipe Bending Guidelines
Piping installation 17.2.3 Pipe bending guidelines Use a pipe bender for bending. All pipe bends should be as gentle as possible (bending radius should be 30~40 mm or larger). 17.2.4 To braze the pipe end NOTICE Precautions when connecting field piping. Add brazing material as shown in the figure. - Page 79 Piping installation a Service port and service port cover b Stop valve c Field piping connection d Stop valve cover a Service port b Stop valve cover c Hexagon hole d Shaft e Valve seat ▪ Do NOT apply excessive force to the stop valve. Doing so may break the valve body.
- Page 80 Piping installation To close the stop valve 1 Remove the stop valve cover. 2 Insert a hexagon wrench into the stop valve and turn the stop valve clockwise. 3 When the stop valve cannot be turned any further, stop turning. 4 Install the stop valve cover.
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Page 81: To Remove The Pinched Pipes
Piping installation 17.2.6 To remove the pinched pipes WARNING Any gas or oil remaining inside the stop valve may blow off the pinched piping. Failure to observe the instructions in procedure below properly may result in property damage or personal injury, which may be serious depending on the circumstances. -
Page 82: To Connect The Refrigerant Piping To The Compressor Unit
Piping installation WARNING NEVER remove the pinched piping by brazing. Any gas or oil remaining inside the stop valve may blow off the pinched piping. 6 Wait until all oil has dripped out before continuing with the connection of the field piping in case the recovery was not complete. - Page 83 Piping installation a b c d a Cut the insulation (under the knockout hole). b Hit on the knockout hole, and remove it. c Remove the burrs. d Paint the edges and areas around the edges using repair paint to prevent rusting. NOTICE Precautions when making knockout holes: ▪...
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Page 84: To Connect The Refrigerant Piping To The Heat Exchanger Unit
Piping installation WARNING Provide adequate measures to prevent that the unit can be used as a shelter by small animals. Small animals that make contact with electrical parts can cause malfunctions, smoke or fire. 17.2.8 To connect the refrigerant piping to the heat exchanger unit 1 Remove the cover. -
Page 85: To Connect The Refrigerant Branching Kit
Piping installation 17.2.9 To connect the refrigerant branching kit 17.3 Checking the refrigerant piping 17.3.1 About checking the refrigerant piping Refrigerant piping works are Finish piping work. finished? The indoor units, compressor Use procedure: unit and/or heat exchanger "Method 1: Before power ON unit were already powered (regular method)". -
Page 86: Checking Refrigerant Piping: General Guidelines
Piping installation NOTICE Wait until the compressor unit has finished the initialisation to apply setting [2‑21]. Leak test and vacuum drying Checking the refrigerant piping involves: ▪ Checking for any leakages in the refrigerant piping. ▪ Performing vacuum drying to remove all moisture, air or nitrogen in the refrigerant piping. -
Page 87: To Perform A Leak Test
Piping installation If you have a manifold… Then With refrigerant line You can check both circuits at once. To do so, connect splitters the manifold via the splitters to both circuits, and check. Without refrigerant line You have to check the circuits separately. To do so: splitters ▪... -
Page 88: To Perform Vacuum Drying
Piping installation To check for leaks: Vacuum leak test 1 Evacuate the system from the liquid and gas piping to – 1 00.7 kPa (– 1 .007 bar) (5 Torr absolute) for more than 2 hours. 2 Once reached, turn off the vacuum pump and check that the pressure does not rise for at least 1 minute. -
Page 89: To Insulate The Refrigerant Piping
Piping installation INFORMATION After opening the stop valve, it is possible that the pressure in the refrigerant piping does NOT increase. This might be caused by e.g. the closed state of the expansion valve in the compressor unit circuit, but does NOT present any problem for correct operation of the unit. -
Page 90: Precautions When Charging Refrigerant
Piping installation Typical workflow Charging additional refrigerant typically consists of the following stages: Determining how much you have to charge additionally. Charging additional refrigerant (pre-charging and/or manual charging). Filling in the fluorinated greenhouse gases label, and fixing it to the inside of the compressor unit. -
Page 91: To Determine The Additional Refrigerant Amount
Piping installation 17.4.3 To determine the additional refrigerant amount Formula: R=[(X ×Ø12.7)×0.12+(X ×Ø9.5)×0.059+(X ×Ø6.4)×0.022]×A+B R Additional refrigerant to be charged [in kg and rounded off to 1 decimal place] Total length [m] of liquid piping size at Øa 1...3 A+B Parameters A and B Parameters A and B: Model RKXYQ5... - Page 92 Piping installation Manifold Connections Compressor unit 5 HP Circuit 1 and 2 together p < p > R410A Only circuit 1 RDXYQ 8 HP Only circuit 2 RDXYQ a Pressure reducing valve b Nitrogen c Weighing scales d Refrigerant R410A tank (siphon system) e Vacuum pump f Liquid line stop valve (circuit 2: to indoor units) g Gas line stop valve (circuit 2: to indoor units)
- Page 93 Piping installation Refrigerant bottle Connected to the service port for refrigerant charge. This charges to both circuits, and to the compressor unit's internal refrigerant piping. Stop valves Open Compressor Operates 5 Connect as shown. Make sure valve A is closed. p <...
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Page 94: Error Codes When Charging Refrigerant
Piping installation 12 Press BS3 to stop the manual additional refrigerant charge mode. NOTICE Make sure to open all stop valves after (pre-) charging the refrigerant. Operating with the stop valves closed will damage the compressor. NOTICE After adding the refrigerant, do not forget to close the lid of the refrigerant charging port. -
Page 95: Electrical Installation
Electrical installation 18 Electrical installation In this chapter 18.1 About connecting the electrical wiring ..........................18.1.1 Precautions when connecting the electrical wiring ....................18.1.2 Field wiring: Overview............................18.1.3 About the electrical wiring............................. 18.1.4 Guidelines when knocking out knockout holes ..................... 18.1.5 About electrical compliance .......................... - Page 96 Electrical installation 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 ▪...
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Page 97: Field Wiring: Overview
Electrical installation NOTICE ▪ The reversed phase protection detector of this product only functions when the product starts up. Consequently reversed phase detection is not performed during normal operation of the product. ▪ The reversed phase protection detector is designed to stop the product in the event of an abnormality when the product is started up. - Page 98 Electrical installation Branches Maximum number of branches for unit- to-unit cabling Transmission wiring Sheathed + shielded cable (2 wires) Vinyl cords 0.75~1.25 mm² (using shielded cable for the transmission wiring is mandatory for 5 HP, and optional for 8 HP) Maximum wiring length 300 m (= distance between compressor unit and furthest indoor unit)
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Page 99: About The Electrical Wiring
Electrical installation 18.1.3 About the electrical wiring 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. ▪ Transmission wiring and power supply wiring may not touch internal piping (except the inverter PCB cooling pipe) in order to avoid wire damage due to high temperature piping. -
Page 100: Safety Device Requirements
Electrical installation 18.1.6 Safety device requirements NOTICE When using residual current operated circuit breakers, be sure to use a high-speed type 300 mA rated residual operating current. Power supply: Compressor unit The power supply must be protected with the required safety devices, i.e. a main switch, a slow blow fuse on each phase and an earth leakage protector in accordance with the applicable legislation. -
Page 101: To Connect The Electrical Wiring On The Compressor Unit
Electrical installation Total wiring length 600 m (= distance between compressor unit and all indoor units, and between compressor unit and heat exchanger unit) If the total transmission wiring exceeds these limits, it may result in communication error. 18.2 To connect the electrical wiring on the compressor unit NOTICE ▪... - Page 102 Electrical installation 3 Connect the power supply as follows: 3N~ 50 Hz 380-415 V L1 L2 L3 L1 L2 L3 a Earth leakage circuit breaker b Fuse c Power supply cable 4 Route the wiring through the frame, and fix the cables (power supply and transmission wiring) with cable ties.
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Page 103: To Connect The Electrical Wiring On The Heat Exchanger Unit
Electrical installation b Power supply c Cable tie 5 Reattach the service covers. See "18.5 To close the compressor unit" [ 105]. 6 Connect an earth leakage circuit breaker and fuse to the power supply line. 18.3 To connect the electrical wiring on the heat exchanger unit NOTICE ▪... -
Page 104: To Finish The Transmission Wiring
Electrical installation 1~ 50 Hz 220-240 V a Earth leakage circuit breaker b Fuse c Power supply cable 4 Route the wiring through the frame, and fix the cables (power supply and transmission wiring) with cable ties. a Transmission wiring b Power supply c Cable tie 18.4 To finish the transmission wiring... -
Page 105: To Close The Compressor Unit
Electrical installation 18.5 To close the compressor unit NOTICE When closing the cover, make sure that the tightening torque does NOT exceed 4.1 N•m. 5× 4× 18.6 To close the heat exchanger unit NOTICE When closing the cover, make sure that the tightening torque does NOT exceed 4.1 N•m. - Page 106 Electrical installation Then ≥1 MΩ Insulation resistance is OK. This procedure is finished. <1 MΩ Insulation resistance is not OK. Go to the next step. 2 Turn ON the power and leave it on for 6 hours. Result: The compressor will heat up and evaporate any refrigerant in the compressor.
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Page 107: Configuration
Configuration 19 Configuration In this chapter 19.1 Overview: Configuration................................. 107 19.2 Making field settings................................107 19.2.1 About making field settings ........................... 107 19.2.2 To access the field setting components ........................ 108 19.2.3 Field setting components............................108 19.2.4 To access mode 1 or 2............................110 19.2.5 To use mode 1 (and default situation) ........................ -
Page 108: To Access The Field Setting Components
Configuration PC configurator You can also make 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 compressor unit" [ 122]. - Page 109 Configuration 5 HP 8 HP TEST/ MODE MASTER SLAVE L.N.O.P. DEMAND MULTI MODE RETURN TEST RESET 1 2 3 4 1 2 3 4 ON ( ) OFF ( ) Flashing ( ) ON ( ) OFF ( ) Flashing ( DIP switches Only change the factory settings if you install a cool/heat selector switch.
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Page 110: To Access Mode 1 Or 2
Configuration 7‑LEDs display or 7-segments display The display gives feedback about the field settings, which are defined as [Mode- Setting]=Value. The display differs depending on the model. Model Display 5 HP 7‑LEDs display: ▪ H1P: Shows the mode ▪ H2P~H7P: Shows the settings and values, represented in binary code (H8P: NOT used for field settings, but used during initialisation) -
Page 111: To Use Mode 1 (And Default Situation)
Configuration 5 HP 8 HP 10~12 min 1~2 min 8~10 min a Power ON b Default situation c LED indication when there is a malfunction If the default situation is not displayed after 10~12 minutes, check the malfunction code on the indoor unit user interface (and in case of 8 HP on the compressor unit 7‑segment display). - Page 112 Configuration Action Button/display Make sure the LEDs are showing the default situation. (H1P OFF) 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 –...
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Page 113: To Use Mode 2
Configuration Action Button/display BS1 [1×] Quit mode 1. 19.2.6 To use mode 2 In mode 2 you can make field settings to configure the system. How to do this differs slightly depending on the model. Example: 7‑LEDs display – Mode 2 (in case of 5 HP) You can change the value of setting [2‑8] (= T target temperature during cooling... -
Page 114: Mode 1 (And Default Situation): Monitoring Settings
Configuration Action Button/display BS3 [1×] Select value 4 (= 8°C). a: Display the current value. BS2 [X×] b: Change to 4. ("X×" depends on BS3 [1×] the current value, and the value BS3 [1×] that you want to select.) c: Enter the value in the system. d: Confirm. - Page 115 Configuration Value / Description Shows the status of power consumption limitation operation. Unit is currently not operating under power consumption limitations. Unit is currently operating under power consumption limitation. Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions. Power consumption limitation can be set in mode 2.
- Page 116 Configuration Setting ( Value / Description [1‑14] When the latest malfunction codes were reset by accident on an indoor Shows the latest malfunction code. unit user interface, they can be checked [1‑15] again through this monitoring settings. Shows the 2nd last malfunction code. For the content or reason behind the malfunction code see "23.3 Solving...
- Page 117 Configuration Setting Value / Description [1‑2] Unit is currently not operating under power consumption limitations. Shows the status of power consumption Unit is currently operating under power limitation operation. consumption limitation. Power consumption limitation reduces the power consumption of the unit compared to nominal operating conditions.
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Page 118: Mode 2: Field Settings
Configuration Setting Value / Description [1‑41] For more information, see setting [2‑82]. Shows the current heating comfort setting. 19.2.8 Mode 2: Field settings In mode 2 you can make field settings to configure the system. The display and the settings differ depending on the model. - Page 119 Configuration Setting Value Description (8 HP) (5 HP) [2‑12] Deactivated. (default Enable the low noise function and/or (= binary 1) (default) power consumption limitation via external control adaptor (DTA104A61/62). Activated. If the system needs to be running under (= binary 2) low noise operation or under power consumption limitation conditions when an external signal is sent to the unit, this setting should be changed.
- Page 120 Configuration Setting Value Description (8 HP) (5 HP) [2‑21] Deactivated. (default Refrigerant recovery/vacuuming mode. (= binary 1) (default) In order to achieve a free pathway to Activated. reclaim refrigerant out of the system or to remove residual substances or to vacuum (= binary 2) To stop the refrigerant recovery/ the system it is necessary to apply a setting vacuuming mode, push BS1 (in case...
- Page 121 Configuration Setting Value Description (8 HP) (5 HP) [2‑30] Power consumption limitation level — (step 1) via the external control adaptor (DTA104A61/62). (default (= binary 2) (default) If the system needs to be running under power consumption limitation conditions — when an external signal is sent to the unit, this setting defines the level power consumption limitation that will be applied (= binary 4)
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Page 122: To Connect The Pc Configurator To The Compressor Unit
Configuration Setting Value Description (8 HP) (5 HP) [2‑82] (in case of 8 HP) (= binary [2‑42]) (in Mild case of 5 HP) (default (default) Heating comfort setting. Quick This setting is used in conjunction with setting [2‑9]. Powerful 19.2.9 To connect the PC configurator to the compressor unit 5 HP 8 HP X27A... -
Page 123: Available Main Operation Methods
Configuration 19.3.1 Available main operation methods Basic The refrigerant temperature is fixed independent from the situation. It corresponds to the standard operation which is known and can be expected from/ under previous VRV systems. To activate this in… Change… Cooling operation [2‑8]=2 Heating operation [2‑9]=6... -
Page 124: Available Comfort Settings
Configuration [2‑8] target (°C) [2‑9] target (°C) 19.3.2 Available comfort settings For each of above modes a comfort level can be selected. The comfort level is related to the timing and the effort (energy consumption) which is put in achieving a certain room temperature by temporarily changing the refrigerant temperature to different values in order to achieve requested conditions more quickly. - Page 125 Configuration ▪ 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. To activate this in… Change… Cooling operation [2‑81]=2 (in case of 8 HP) [2‑41]=2 (in case of 5 HP).
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Page 126: Example: Automatic Mode During Cooling
Configuration To activate this in… Change… Heating operation [2‑82]=0 (in case of 8 HP) [2‑42]=0 (in case of 5 HP). This setting is used in conjunction with setting [2‑9]. 19.3.3 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... -
Page 127: 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 19.3.4 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 128 Configuration Quick Powerful Mild Room temperature evolution: A Indoor unit set temperature B Operation start C Operating time D Mild E Quick F Powerful RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1A – 2020.10...
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Page 129: Commissioning
Commissioning 20 Commissioning In this chapter 20.1 Overview: Commissioning ..............................129 20.2 Precautions when commissioning............................129 20.3 Checklist before commissioning............................. 130 20.4 Checklist during commissioning ............................. 131 20.4.1 About the test run..............................131 20.4.2 To perform a test run (7-LEDs display) ........................132 20.4.3 To perform a test run (7-segment display)...................... -
Page 130: Checklist Before Commissioning
Commissioning INFORMATION During the first running period of the unit, the required power may be higher than stated on the nameplate of the unit. This phenomenon is caused by the compressor, that needs a continuous run time of 50 hours before reaching smooth operation and stable power consumption. -
Page 131: Checklist During Commissioning
Commissioning Damaged equipment Check the inside of the unit for damaged components or squeezed pipes. Refrigerant leak Check the inside of the unit on refrigerant leakage. If there is a refrigerant leak, try to repair the leak. If the repair is unsuccessful, call your local dealer. Do not touch any refrigerant which has leaked out from refrigerant piping connections. -
Page 132: To Perform A Test Run (7-Leds Display)
Commissioning Abnormalities on indoor units cannot be checked for each unit separately. After the test operation is finished, check the indoor units one by one by performing a normal operation using the user interface. Refer to the indoor unit installation manual for more details concerning the individual test run. -
Page 133: To Perform A Test Run (7-Segment Display)
Commissioning Completion Description Normal completion Abnormal completion Refer to "Correcting after abnormal completion of the test run" [ 134] to take actions for correcting the abnormality. When the test operation is fully completed, normal operation will be possible after 5 minutes. 20.4.3 To perform a test run (7-segment display) (in case of 8 HP) 1 Make sure all field settings you want are set;... -
Page 134: Correcting After Abnormal Completion Of The Test Run
Commissioning Completion Description Abnormal Indication of malfunction code on the 7‑segment display. completion Refer to "Correcting after abnormal completion of the test run" [ 134] to take actions for correcting the abnormality. When the test operation is fully completed, normal operation will be possible after 5 minutes. 20.4.4 Correcting after abnormal completion of the test run The test operation is only completed if there is no malfunction code displayed. -
Page 135: Hand-Over To The User
Hand-over to the user 21 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 136: Maintenance And Service
Maintenance and service 22 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 137: Checklist For Yearly Maintenance Of The Heat Exchanger Unit
Maintenance and service 2 Measure the voltage between terminals on the terminal block for power supply with a tester and confirm that the power supply is shut off. In addition, measure points as shown in the figure, with a tester and confirm that the voltage of the capacitor in the main circuit is less than 50 V DC. -
Page 138: To Recover Refrigerant
Maintenance and service Model Result 8 HP When confirmed, the expansion valves (in the indoor unit, compressor unit and heat exchanger unit) will fully open. At that moment the 7‑segment display indication= and the user interface of all indoor units indicate TEST (test operation) and (external control) and the operation will be prohibited. -
Page 139: Troubleshooting
Troubleshooting 23 Troubleshooting In this chapter 23.1 Overview: Troubleshooting ..............................139 23.2 Precautions when troubleshooting............................139 23.3 Solving problems based on error codes..........................139 23.3.1 Error codes: Overview............................140 23.1 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 140: Error Codes: Overview
Troubleshooting INFORMATION If a malfunction occurs: ▪ In case of 5 HP: The error code is displayed on the user interface of the indoor unit. ▪ In case of 8 HP: The error code is displayed on the compressor unit's 7‑segments display and on the user interface of the indoor unit. INFORMATION If a malfunction occurs, the error code is displayed on the outdoor unit's 7‑segments display and on the user interface of the indoor unit. - Page 141 Troubleshooting Main code Cause Solution ▪ The stop valves of the compressor unit are ▪ Open the stop valves on both the gas and left closed. liquid side. ▪ Insufficient refrigerant ▪ Check if the additional refrigerant charge has been finished correctly. Recalculate the required amount of refrigerant from the piping length and add an adequate amount of refrigerant.
- Page 142 Troubleshooting Main code Cause Solution Malfunction code: System test run not yet Execute system test run. executed (system operation not possible) ▪ No power is supplied to the compressor unit. ▪ Check if all units are powered on. ▪ Transmission wiring malfunction ▪...
- Page 143 Troubleshooting Main code Sub code Cause Solution Low pressure malfunction: ▪ Open stop valves. ▪ Stop valve closed ▪ Check refrigerant amount+recharge unit. ▪ Refrigerant shortage ▪ Check the user interface's display or ▪ Indoor unit malfunction transmission wiring between the outdoor unit and the indoor unit.
- Page 144 Troubleshooting Main code Sub code Cause Solution Liquid temperature sensor (after Check connection on PCB or actuator. subcool HE) malfunction Compressor unit: (R5T) - A1P (X30A) Gas temperature sensor (after subcool Check connection on PCB or actuator. HE) malfunction Compressor unit: (R6T) - A1P (X30A) High pressure sensor malfunction Check connection on PCB or actuator.
- Page 145 Troubleshooting Main code Sub code Cause Solution Warning: faulty wiring to Q1/Q2 Check Q1/Q2 wiring. Do NOT use Q1/ Malfunction code: faulty wiring to Q1/ Check Q1/Q2 wiring. Do NOT use Q1/ ▪ Too many indoor units are connected Check indoor unit amount and total to F1/F2 line capacity connected.
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Page 146: Disposal
Disposal 24 Disposal NOTICE Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation... -
Page 147: Technical Data
Technical data 25 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 25.1... - Page 148 Technical data M1C Compressor M1F, M2F Fan motor R1T (A) Thermistor (air) R2T (A) Thermistor (gas) R3T (A) Thermistor (coil) R2T (B) Thermistor (discharge) R3T (B) Thermistor (suction accumulator) R4T (B) Thermistor (subcool heat exchanger gas) R5T (B) Thermistor (suction compressor) R7T (B) Thermistor (liquid) S1NPH High pressure sensor S1NPL Low pressure sensor...
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Page 149: Wiring Diagram: Compressor Unit
Technical data R3T (A) Thermistor (coil) R21T (B) Thermistor (discharge) R3T (B) Thermistor (suction accumulator) R5T (B) Thermistor (liquid) R6T (B) Thermistor (subcool heat exchanger gas) R7T (B) Thermistor (suction compressor) S1NPH High pressure sensor S1NPL Low pressure sensor S1PH High pressure switch Y1E, Y2E Electronic expansion valve Y1S Solenoid valve (4‑way valve) Heating... - Page 150 Technical data Motor (fan) Switching power supply (A2P) Q1DI Earth leakage circuit breaker (field supply) Resistor (A2P) Thermistor (discharge) Thermistor (suction accumulator) Thermistor (subcool heat exchanger gas) Thermistor (suction compressor) Thermistor (liquid) R10T Thermistor (fin) S1NPL Low pressure sensor S1NPH High pressure sensor S1PH High pressure switch...
- Page 151 Technical data Capacitor (A3P) DIP switch (A1P) E1HC Crankcase heater Fuse (T 3.15 A / 250 V) (A1P) Field fuse F400U Fuse (T 6.3 A / 250 V) (A2P) F410U Fuse (T 40 A / 500 V) (A2P) F411U Fuse (T 40 A / 500 V) (A2P) F412U Fuse (T 40 A / 500 V) (A2P) Running LED (service monitor green) (A1P) Magnetic contactor (A3P)
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Page 152: Wiring Diagram: Heat Exchanger Unit
Technical data Connector Electronic expansion valve Solenoid valve (4‑way valve) Noise filter (ferrite core) Noise filter 25.3 Wiring diagram: Heat exchanger unit The wiring diagram is delivered with the unit, located at the inside of the switch box cover. Symbols: Main terminal Earth wiring Wire number 15... - Page 153 Technical data Diode module (A1P) Terminal strip (power supply) Terminal strip (transmission wiring) Connector Electronic expansion valve Noise filter (ferrite core) Noise filter (A1P) RKXYQ5T8+8T7Y1B + RDXYQ5T8+8T7V1B Installer and user reference guide VRV IV heat pump for indoor installation 4P499898-1A – 2020.10...
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Page 154: 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 156 4P499898-1A 2020.10 Verantwortung für Energie und Umwelt...