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Summary of Contents for Daikin FXNA20A2VEB
- Page 1 Installer and user reference guide VRV system air conditioner FXNA20A2VEB FXNA25A2VEB FXNA32A2VEB FXNA40A2VEB FXNA50A2VEB FXNA63A2VEB...
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Page 2: Table Of Contents
Table of contents Table of contents 1 About the documentation About this document..............................2 General safety precautions About the documentation.............................. 2.1.1 Meaning of warnings and symbols........................ For the installer ................................2.2.1 General................................2.2.2 Installation site............................... 2.2.3 Refrigerant — in case of R410A or R32......................2.2.4 Electrical................................. - Page 3 Table of contents 14 About the box 14.1 Indoor unit..................................14.1.1 To unpack and handle the unit........................14.1.2 To remove the accessories from the indoor unit..................15 About the units and options 15.1 Identification .................................. 15.1.1 Identification label: Indoor unit........................15.2 About the indoor unit..............................
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Page 4: About The Documentation
The original instructions are written in English. All other languages are translations of the original instructions. Technical engineering data ▪ A subset of the latest technical data is available on the regional Daikin website (publicly accessible). FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 –... - Page 5 About the documentation ▪ The full set of the latest technical data is available on the Daikin Business Portal (authentication required). FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 – 2024.09...
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Page 6: General Safety Precautions
General safety precautions 2 General safety precautions 2.1 About the documentation ▪ The original instructions are written in English. All other languages are translations of the original instructions. ▪ The precautions described in this document cover very important topics, follow them carefully. -
Page 7: For The Installer
WARNING Improper installation or attachment of equipment or accessories could result in electrical shock, short-circuit, leaks, fire or other damage to the equipment. ONLY use accessories, optional equipment and spare parts made or approved by Daikin unless otherwise specified. WARNING Make sure installation, testing and applied materials comply with applicable legislation (on top of the instructions described in the Daikin documentation). -
Page 8: Installation Site
General safety precautions CAUTION Wear adequate personal protective equipment (protective gloves, safety glasses,…) when installing, maintaining or servicing the system. CAUTION Do NOT touch the air inlet or aluminium fins of the unit. CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪... - Page 9 General safety precautions DANGER: RISK OF EXPLOSION Pump down – Refrigerant leakage. If you want to pump down the system, and there is a leak in the refrigerant circuit: ▪ Do NOT use the unit's automatic pump down function, with which you can collect all refrigerant from the system into the outdoor unit.
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Page 10: Electrical
General safety precautions ▪ Whether the unit is factory charged with refrigerant or non-charged, in both cases you might need to charge additional refrigerant, depending on the pipe sizes and pipe lengths of the system. ▪ ONLY use tools exclusively for the refrigerant type used in the system, this to ensure pressure resistance and prevent foreign materials from entering into the system. - Page 11 General safety precautions WARNING ▪ ONLY use copper wires. ▪ Make sure the field wiring complies with the national wiring regulations. ▪ 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 12 General safety precautions Install power cables at least 1 meter away from televisions or radios to prevent interference. Depending on the radio waves, a distance of 1 meter may NOT be sufficient. NOTICE ONLY applicable if the power supply is three‑phase, and the compressor has an ON/ OFF starting method.
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Page 13: Specific Installer Safety Instructions
WARNING Make sure installation, servicing, maintenance, repair and applied materials follow the instructions from Daikin (including all documents listed in “Documentation set”) and, in addition, comply with applicable legislation and are performed by qualified persons only. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard. - Page 14 Specific installer safety instructions "17 Piping installation" [ 59]) Refrigerant piping installation (see CAUTION Piping MUST be installed according to instructions given in "17 Piping installation" [ 59]. Only mechanical joints (e.g. braze+flare connections) that are compliant with the latest version of ISO14903 can be used. CAUTION ▪...
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Page 15: Instructions For Equipment Using R32 Refrigerant
WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation (for example national gas regulation) and are executed ONLY by authorised persons. FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 –... - Page 16 Specific installer safety instructions WARNING ▪ Take precautions to avoid excessive vibration or pulsation to refrigeration piping. ▪ Protect the protection devices, piping and fittings as much as possible against adverse environmental effects. ▪ Provide space for expansion and contraction of long runs of piping. ▪...
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Page 17: Installation Space Requirements
For minimum floor area requirements for indoor units, go to https://www.daikin.eu and search for the latest version of the installation and operation manual of the connected outdoor unit. -
Page 18: For The User
For the user FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 – 2024.09... -
Page 19: User Safety Instructions
User safety instructions 4 User safety instructions Always observe the following safety instructions and regulations. 4.1 General WARNING If you are NOT sure how to operate the unit, contact your installer. WARNING This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning... -
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: dismantling the system, treatment of the refrigerant, of oil and of other parts MUST be done by an authorised installer and MUST comply with applicable legislation. - Page 21 User safety instructions 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. WARNING This unit contains electrical and hot parts.
- Page 22 User safety instructions WARNING If the supply cord is damaged, it MUST be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard. WARNING Do NOT install operating ignition sources (example: open flames, an operating gas appliance or an operating electric heater) in the ductwork.
- Page 23 User safety instructions WARNING Be careful with ladders when working in high places. DANGER: RISK OF ELECTROCUTION Disconnect the power supply for more than 10 minutes, and measure the voltage at the terminals of main circuit capacitors or electrical components before servicing. The voltage MUST be less than 50 V DC before you can touch electrical components.
- Page 24 User safety instructions WARNING ▪ The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas.
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Page 25: About The System
About the system 5 About the system WARNING ▪ Do NOT modify, disassemble, remove, reinstall or repair the unit yourself as incorrect dismantling or installation may cause an electrical shock or fire. Contact your dealer. ▪ In case of accidental refrigerant leaks, make sure there are no naked flames. The refrigerant itself is entirely safe, non-toxic and mildly flammable, but it will generate toxic gas when it accidentally leaks into a room where combustible air from fan heaters, gas cookers, etc. -
Page 26: Information Requirements For Fan Coil Units
Total electric power input elec Sound power level (cooling) dB(A) Sound power level (heating) dB(A) Contact details: DAIKIN INDUSTRIES CZECH REPUBLIC s.r.o. U Nové Hospody 1155/1, 301 00 Plzeň Skvrňany, Czech Republic FXNA20A2VEB 0.051 H: 49, H: 50.5, M: 47.5,... -
Page 27: 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 28: Before Operation
Before operation 7 Before operation CAUTION "4 User safety instructions" [ 19] to acknowledge all related safety instructions. This operation manual is for the following systems with standard control. Before initiating operation, contact your dealer for the operation that corresponds to your system type and mark. -
Page 29: Operation
Operation 8 Operation 8.1 Operation range INFORMATION For the operation limits see the technical data of the connected outdoor unit. 8.2 About operation modes INFORMATION Depending on the installed system, some operation modes will not be available. ▪ The air flow rate may adjust itself depending on the room temperature or the fan may stop immediately. -
Page 30: Special Heating Operation Modes
Operation 8.2.2 Special heating operation modes Operation Description Defrost To prevent a loss of heating capacity due to frost accumulation in the outdoor unit, the system will automatically switch to defrost operation. During defrost operation, the indoor unit fan will stop operation, and the following icon will appear on the home screen: The system will resume normal operation after approximately 6... -
Page 31: Energy Saving And Optimum Operation
Energy saving and optimum operation 9 Energy saving and optimum operation CAUTION NEVER expose little children, plants or animals directly to the airflow. NOTICE Do NOT place objects that should NOT get wet below the unit. Condensation on the unit or refrigerant pipes, or drain blockage may cause dripping. Possible consequence: Objects under the unit can get dirty or damaged. -
Page 32: Maintenance And Service
Maintenance and service 10 Maintenance and service 10.1 Precautions for maintenance and service CAUTION "4 User safety instructions" [ 19] to acknowledge all related safety instructions. NOTICE NEVER inspect or service the unit by yourself. Ask a qualified service person to perform this work. However, as end user, you may clean the air filter and air outlet. NOTICE Maintenance MUST be done by an authorised installer or service agent. -
Page 33: Cleaning The Air Filter And Air Outlet
Maintenance and service 10.2 Cleaning the air filter and air outlet CAUTION Turn off the unit before cleaning the air filter and air outlet. NOTICE ▪ Do NOT use gasoline, benzene, thinner polishing powder or liquid insecticide. Possible consequence: Discoloration and deformation. ▪... -
Page 34: To Clean The Air Outlet
Maintenance and service 6 Turn ON the power. 7 To remove warning screens, see the reference guide of the user interface. 10.2.2 To clean the air outlet WARNING Do NOT let the indoor unit get wet. Possible consequence: Electrical shock or fire. Clean with a soft cloth. -
Page 35: About The Refrigerant Leakage Sensor
Maintenance and service WARNING: MILDLY FLAMMABLE MATERIAL The refrigerant inside this unit is mildly flammable. WARNING ▪ The refrigerant inside the unit is mildly flammable, but normally does NOT leak. If the refrigerant leaks in the room and comes in contact with fire from a burner, a heater, or a cooker, this may result in fire, or the formation of a harmful gas. - Page 36 Maintenance and service INFORMATION The sensor has a lifetime of 10 years. The user interface displays error "CH-05" 6 months before the end of the sensor lifetime and error "CH-02" after the end of the sensor lifetime. For more information, refer to the reference guide of the user interface and contact your dealer.
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Page 37: Troubleshooting
Troubleshooting 11 Troubleshooting If one of the following malfunctions occurs, 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, electrical shock or fire. -
Page 38: Symptoms That Are Not System Malfunctions
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 39: Symptom: White Mist Comes Out Of A Unit (Indoor Unit)
Troubleshooting 11.1.2 Symptom: White mist comes out of a unit (Indoor unit) ▪ When humidity is high during cooling operation (in oily and dusty places). If the interior of an indoor unit is extremely contaminated, the temperature distribution inside a room becomes uneven. It is necessary to clean the interior of the indoor unit. -
Page 40: Relocation
Relocation 12 Relocation Contact your dealer to remove and reinstall the entire unit. Moving units requires technical expertise. FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 – 2024.09... -
Page 41: Disposal
Disposal 13 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. FXNA-A Installer and user reference guide VRV system air conditioner... -
Page 42: For The Installer
For the installer FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 – 2024.09... -
Page 43: About The Box
About the box 14 About the box Keep the following in mind: ▪ At delivery, the unit MUST be checked for damage and completeness. Any damage or missing parts MUST be reported immediately to the claims agent of the carrier. ▪... - Page 44 About the box c Air filter C Next to unit (on the fan motor side) d Washers for hanger bracket e Screws for duct flanges (M5×12) f Metal clamp g Sealing pads: small and large h Drain hose i Sealing material j Insulation piece: Small (liquid pipe) k Insulation piece: Large (gas pipe) l Tie wraps large and small...
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Page 45: About The Units And Options
About the units and options 15 About the units and options In this chapter 15.1 Identification................................... 15.1.1 Identification label: Indoor unit ..........................15.2 About the indoor unit................................15.3 System layout..................................15.4 Combining units and options ..............................15.4.1 Possible options for the indoor unit ........................15.1 Identification NOTICE When installing or servicing several units at the same time, make sure NOT to switch... -
Page 46: System Layout
About the units and options 15.3 System layout INFORMATION The following figure is an example and may NOT completely match your system layout. °C °C a Indoor unit b Outdoor unit c User interface 15.4 Combining units and options INFORMATION Certain options may NOT be available in your country. - Page 47 About the units and options ▪ Optional output PCB (to provide output for external device): The PCB will trigger the external alarm in case of leak detection, sensor failure or when the sensor is disconnected. For the exact model name, see the option list of the indoor unit. For more information about this option, refer to the installation manual of the optional output PCB.
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Page 48: Unit Installation
For minimum floor area requirements for indoor units, go to https://www.daikin.eu and search for the latest version of the installation and operation manual of the connected outdoor unit. - Page 49 Unit installation INFORMATION Also read the general installation site requirements. See the "2 General safety precautions" [ 6] chapter. 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.
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Page 50: Mounting The Indoor Unit
Unit installation Unit installed with the duct (side view) Ensure the discharge grille/duct airflow is blowing in a horizontal or downward direction (airflow direction MUST be within the “allowed area” b). Install appropriate measures (e.g. discharge blades c) that will ensure the allowed direction of airflow. - Page 51 Unit installation ▪ Wall or floor strength. Check whether the wall or the floor is strong enough to support the weight of the unit. If there is a risk, reinforce the wall or the floor before installing the unit. ▪ Suspension bolts.
- Page 52 Unit installation c Air inlet d Air outlet 2 Remove one leg on the opposite side of the electronic component box. 3 Reattach the removed suction cover to the bottom side. 4 Attach the protective grille to the front side. 5 Reattach the leg if necessary.
- Page 53 Unit installation ▪ Fixing the unit. Level the unit with the levelling screws (accessory). If the floor is too uneven to level the unit, place the unit on a flat and levelled base. If the unit is in danger of falling over, fasten it to the wall using factory-made holes or to the floor using floor fasteners (field supply).
- Page 54 Unit installation Removing the legs If it is necessary to remove the legs, follow these instructions: 2× 1× A Bottom view B Side view a Protective grille b Leg 1 In case of bottom suction, remove the air filter. 2 Remove 4 screws (2 on each side) that hold both legs on the bottom side of the unit.
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Page 55: Guidelines When Installing The Ducting
Unit installation a Installation box lid for second PCB b 2 screws (M4×16) c Installation box lid for first PCB Wiring installation for Installation box for optional PCB 1 Clamp wires by using the cord sticker (accessory of the installation box) and the clamp (accessory of the installation box). -
Page 56: Guidelines When Installing The Drain Piping
Unit installation Number of screws according to class 25~32 40~50 2 Air outlet side. Connect the canvas duct to the inside of the outlet side flange. Connect the duct to the canvas duct. a Screws for duct flanges For air inlet side: accessory For air outlet side: on the unit b Flange For air inlet side: field supply... - Page 57 Unit installation ▪ Combining drain pipes. You can combine drain pipes. Make sure to use drain pipes and T-joints with the correct gauge for the operating capacity of the units. a Central drain piping (with slope of at least 1/100) To connect the drain piping to the indoor unit NOTICE Incorrect connection of the drain hose might cause leaks, and damage the...
- Page 58 Unit installation NOTICE ▪ Do NOT remove the drain pipe plug. Water might leak out. ▪ Use the drain outlet only to discharge the water before maintenance. ▪ Insert and remove the drain plug gently. Excessive force may deform the drain socket of the drain pan.
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Page 59: 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 insulation ..........................17.2 Connecting the refrigerant piping............................17.2.1 About connecting the refrigerant piping....................... 17.2.2 Precautions when connecting the refrigerant piping ................... 17.2.3 Guidelines when connecting the refrigerant piping ..................... -
Page 60: Refrigerant Piping Insulation
Piping installation Flare connections Only use annealed material. Piping temper grade and thickness Outer diameter (Ø) Temper grade Thickness (t) Ø 6.4 mm (1/4") Annealed (O) ≥0.8 mm 9.5 mm (3/8") 12.7 mm (1/2") Depending on the applicable legislation and the maximum working pressure of the unit (see "PS High"... -
Page 61: Precautions When Connecting The Refrigerant Piping
Piping installation 17.2.2 Precautions when connecting the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [ 6] ▪ "17.1 Preparing refrigerant piping" [ 59] DANGER: RISK OF BURNING/SCALDING NOTICE ▪ Do NOT use mineral oil on flared part. ▪... -
Page 62: Guidelines When Connecting The Refrigerant Piping
Piping installation NOTICE Do NOT open the refrigerant stop valve before checking the refrigerant piping. When you need to charge additional refrigerant it is recommended to open the refrigerant stop valve after charging. 17.2.3 Guidelines when connecting the refrigerant piping Take the following guidelines into account when connecting pipes: ▪... -
Page 63: To Connect The Refrigerant Piping To The Indoor Unit
Piping installation a Cut exactly at right angles. b Remove burrs. 3 Remove the flare nut from the stop valve and put the flare nut on the pipe. 4 Flare the pipe. Set exactly at the position as shown in the following figure. Flare tool for R32 Conventional flare tool (clutch type) - Page 64 Piping installation b Tie wraps: Large (accessory) c Insulation pieces: Large (gas pipe), small (liquid pipe) (accessory) d Flare nut (attached to the unit) e Refrigerant pipe connection (attached to the unit) f Unit g Sealing pads: Small (gas pipe) (accessory) 1 Turn up the seams of the insulation pieces.
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Page 65: 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 Guidelines when connecting the electrical wiring ....................18.1.3 Specifications of standard wiring components ..................... 18.2 To connect the electrical wiring to the indoor unit ....................... 18.1 About connecting the electrical wiring Typical workflow Connecting the electrical wiring typically consists of the following stages:... -
Page 66: Guidelines When Connecting The Electrical Wiring
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 shocks. ▪... -
Page 67: Specifications Of Standard Wiring Components
Electrical installation Use the following methods for installing wires: Wire type Installation method Single-core wire AA´ A´ Stranded conductor wire twisted to "solid-like" connection a Curled wire (single-core or twisted stranded conductor wire) b Screw c Flat washer Stranded conductor wire with round crimp-style terminal a Terminal... -
Page 68: To Connect The Electrical Wiring To The Indoor Unit
Electrical installation Power supply of the product FXNA20~32: 0.9 A FXNA40~63: 1.1 A MCA=Minimum circuit ampacity. Stated values are maximum values (see electrical data of indoor unit for exact values). Wiring / circuit breaker (field supplied) Power supply cable MUST comply with national wiring regulation. 3-core cable Wire size based on the current, but not less than 1.5 mm... - Page 69 Electrical installation A Inside the unit B Outside the unit a Service cover b Wiring diagram c Connection of interconnection and user interface wiring d Connection of power supply e Opening for cables f Wire g Sealing material (accessory) 2 User interface cable: Route the cable through the frame, connect the cable to the terminal block (symbols P1, P2).
- Page 70 Electrical installation 6 Wrap the cables with the sealing material (accessory) to prevent water from entering the unit. Seal all gaps to prevent small animals from entering the system. 7 Reattach the service cover. Complete system example 1 user interface controls 1 indoor unit. TO IN/D TO OUT/D a Outdoor unit...
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Page 71: Commissioning
19 Commissioning NOTICE General commissioning checklist. Next to the commissioning instructions in this chapter, a general commissioning checklist is also available on the Daikin Business Portal (authentication required). The general commissioning checklist is complementary to the instructions in this chapter and can be used as a guideline and reporting template during commissioning and hand-over to the user. -
Page 72: Checklist Before Commissioning
Commissioning 19.3 Checklist before commissioning 1 After the installation of the unit, check the items listed below. 2 Close the unit. 3 Power up the unit. You have read the complete installation and operation instructions 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. - Page 73 Commissioning NOTICE Do NOT interrupt the test run. FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 – 2024.09...
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Page 74: Configuration
Configuration 20 Configuration 20.1 Field setting Make the following field settings so that they correspond with the actual installation setup and with the needs of the user: ▪ Static pressure ▪ Air volume when thermostat control is OFF ▪ Time to clean air filter ▪... - Page 75 Configuration If you want… Then — During thermostat 12 (22) OFF at cooling Setup volume operation Monitoring 1 Monitoring 2 During thermostat 12 (22) OFF at heating Setup volume operation Monitoring 1 Monitoring 2 Only use in combination with optional remote sensor or when setting M 10 (20), SW 2, — 03 is used.
- Page 76 Configuration Setting: Thermostat differential changeover (if remote sensor is used) If the system contains a remote sensor, set the increase/decrease increments. If you want to change increments to… Then — 1°C 12 (22) 0.5°C Setting: Differential for automatic changeover Set temperature difference between cooling setpoint and heating setpoint in automatic mode (availability depends on the system type).
- Page 77 Configuration FORCED Input A a Forced OFF b Input A Wiring requirements Wiring specification Sheathed vinyl cord or 2-core cable Wiring size 0.75~1.25 mm Wiring length Maximum 100 m External contact specification Contact that can make and break the min. load of DC15 V · 1 mA This setting must correspond with the needs of the user.
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Page 78: 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, 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 79: Troubleshooting
Troubleshooting 22 Troubleshooting 22.1 Solving problems based on error codes If the unit runs into a problem, the user interface displays an error code. It is important to understand the problem and to take measures before resetting an error code. This should be done by a licensed installer or by your local dealer. This chapter gives you an overview of most possible error codes and their descriptions as they appear on the user interface. - Page 80 Troubleshooting Code Description Room temperature thermistor in remote controller abnormality FXNA-A Installer and user reference guide VRV system air conditioner 4P785124-1 – 2024.09...
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Page 81: Disposal
Disposal 23 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. FXNA-A Installer and user reference guide VRV system air conditioner... -
Page 82: Technical Data
A subset of the latest technical data is available on the regional Daikin website (publicly accessible). ▪ The full set of the latest technical data is available on the Daikin Business Portal (authentication required). 24.1 Wiring diagram 24.1.1 Unified wiring diagram legend For applied parts and numbering, refer to the wiring diagram on the unit. - Page 83 Technical data Symbol Meaning AC*, CN*, E*, HA*, HE*, HL*, HN*, HR*, Connection, connector MR*_A, MR*_B, S*, U, V, W, X*A, K*R_*, NE D*, V*D Diode Diode bridge DIP switch Heater FU*, F*U, (for characteristics, refer to Fuse PCB inside your unit) Connector (frame ground) Harness H*P, LED*, V*L...
- Page 84 Technical data Symbol Meaning Thermo switch Residual current device Resistor Thermistor Receiver Limit switch Float switch S*NG Refrigerant leak detector S*NPH Pressure sensor (high) S*NPL Pressure sensor (low) S*PH, HPS* Pressure switch (high) S*PL Pressure switch (low) Thermostat S*RH Humidity sensor S*W, SW* Operation switch SA*, F1S...
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Page 85: 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 88 4P785124-1 2024.09...
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