Daikin FDA125A5VEB Manual
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Daikin FDA125A5VEB Manual

Split system air conditioners
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Summary of Contents for Daikin FDA125A5VEB

  • Page 1 Installer and user reference guide Split system air conditioners FDA125A5VEB...

  • Page 2: Table Of Contents

    14 About the box 14.1 Indoor unit ..................................44 14.1.1 To unpack and handle the unit ........................44 14.1.2 To remove the accessories from the indoor unit ..................45 Installer and user reference guide FDA125A5VEB Split system air conditioners 4P495031-1B – 2022.10...
  • Page 3 Solving problems based on error codes ......................... 76 22.1.1 Error codes: Overview ............................ 76 23 Disposal 24 Technical data 24.1 Wiring diagram................................78 24.1.1 Unified wiring diagram legend ........................78 25 Glossary FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 4: About The Documentation

    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 5: Meaning Of Warnings And Symbols

    About the documentation 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 6 Example: " 1–3 Figure title" means "Figure 3 in chapter 1". Indicates a table title or a reference to it. Example: " 1–3 Table title" means "Table 3 in chapter 1". FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 7: 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 8: Installation Site

    WARNING Make sure installation, servicing, maintenance and repair comply with instructions from Daikin and with applicable legislation and are executed ONLY by authorised persons. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B –...
  • Page 9 Indoor units without a refrigerant leakage sensor; in case of indoor units with refrigerant leakage sensor, consult the installation manual ▪ Outdoor units installed or stored indoors (e.g. winter garden, garage, machinery room) FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 10 Then use the graph or table for… <1.8 m Floor-standing units 1.8≤x<2.2 m Wall-mounted units ≥2.2 m Ceiling-mounted units 3 Use the graph or table to determine the minimum floor area. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 11: Refrigerant - In Case Of R410A Or R32

    Use a separate recovery system so that the unit's compressor does NOT have to operate. WARNING During tests, NEVER pressurise the product with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit). FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 12 Charge the liquid refrigerant as follows: Then A siphon tube is present Charge with the cylinder upright. (i.e., the cylinder is marked with "Liquid filling siphon attached") FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 13: Electrical

    If NOT factory installed, a main switch or other means for disconnection, having a contact separation in all poles providing full disconnection under overvoltage category III condition, MUST be installed in the fixed wiring. FDA125A5VEB Installer and user reference guide Split system air conditioners...
  • Page 14 Use an appropriate screwdriver for tightening the terminal screws. A screwdriver with a small head will damage the head and make proper tightening impossible. ▪ Over-tightening the terminal screws may break them. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 15 ON and OFF while the product is operating, attach a reversed phase protection circuit locally. Running the product in reversed phase can break the compressor and other parts. FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 16: 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 17 ▪ Make electrical connections to the fixed wiring. ▪ All components procured on-site and all electrical construction MUST comply with the applicable legislation. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 18 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. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 19: For The User

    For the user FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 20: User Safety Instructions

    Do NOT place any objects containing water on the unit. CAUTION ▪ Do NOT place any objects or equipment on top of the unit. ▪ Do NOT sit, climb or stand on the unit. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 21: Instructions For Safe Operation

    Always have qualified service personnel confirm that the point of leakage has been repaired or corrected before resuming operation. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 22 WARNING Do NOT place a flammable spray bottle near the air conditioner and do NOT use sprays near the unit. Doing so may result in a fire. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 23 To clean the air conditioner or air filter, be sure to stop operation and turn all power supplies OFF. Otherwise, an electrical shock and injury may result. WARNING Be careful with ladders when working in high places. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 24 Do NOT use cleaning materials or means to accelerate the defrosting process other than those recommended by the manufacturer. ▪ Be aware that the refrigerant inside the system is odourless. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 25 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. Contact your dealer. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 26: About The System

    Indoor unit b Outdoor unit c User interface d Suction air e Discharge air f Refrigerant piping + interconnection cable g Drain pipe h Earth wiring FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 27: 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 1/1155, 301 00 Plzeň Skvrňany, Czech Republic FDA125A 7.83 4.27 13.50 0.35 FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B –...

  • Page 28: User Interface

    This operation manual offers a non-exhaustive overview of the main functions of the system. For more information about the user interface, see the operation manual of the installed user interface. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 29: Before Operation

    If your installation has a customised control system, ask your dealer for the operation that corresponds to your system. FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 30: Operation

    8.2 About operation modes INFORMATION Depending on the installed system, some operation modes will not be available. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 31: Basic Operation Modes

    8.3 To operate the system INFORMATION For setting of the operation mode or other settings, see the reference guide or operation manual of the user interface. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 32: Energy Saving And Optimum Operation

    Adjust the air flow direction to avoid cool air from gathering on the floor or warm air against the ceiling. (Up during cooling or dry operation to the ceiling and down during heating operation.) ▪ Avoid direct air flow to room inhabitants. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 33: Maintenance And Service

    How to clean the air filter: 1 Remove the air filters by pulling their cloth upward (in case of rear suction) or backward (in case of bottom suction). FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 34: To Clean The Air Outlet

    E.g., at the end of the season. ▪ Let the indoor units run in fan only operation for about half a day in order to dry the interior of the units. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 35: Maintenance After A Long Stop Period

    WARNING: MILDLY FLAMMABLE MATERIAL The R32 refrigerant (if applicable) in this unit is mildly flammable. Refer to the outdoor unit specifications for the type of refrigerant to be used. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 36 ▪ Do NOT use the unit until a service person confirms that the part from which the refrigerant leaked has been repaired. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 37: Troubleshooting

    Remove any operation. obstacles and make sure the air can flow freely. ▪ Check if the air filter is clogged (see "10.2.1  To clean the air filter" [  33]). FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 38: Symptoms That Are Not System Malfunctions

    The air conditioner does not start immediately after the ON/OFF button on the user interface is pressed. If the operation lamp lights, the air conditioner is in normal condition. It does not restart immediately because one of its safety FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 39: Symptom: White Mist Comes Out Of A Unit (Indoor Unit)

    ▪ A "pishi-pishi" squeaking sound is heard when the system stops after heating operation. Expansion and contraction of plastic parts caused by temperature change make this noise. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 40: Symptom: Noise Of Air Conditioners (Indoor Unit, Outdoor Unit)

    11.1.8 Symptom: The units can give off odours The unit can absorb the smell of rooms, furniture, cigarettes, etc., and then emit it again. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 41: Relocation

    Relocation 12 Relocation Contact your dealer to remove and reinstall the entire unit. Moving units requires technical expertise. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 42: Disposal

    Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 43: For The Installer

    For the installer FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 44: About The Box

    1 Lift the unit by holding on to the hanger brackets without exerting any pressure on other parts, especially on refrigerant piping, drain piping and other resin parts. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 45: To Remove The Accessories From The Indoor Unit

    Sealing pads: Large (drain pipe), medium 1 (gas pipe), medium 2 (liquid pipe) g Drain hose h Insulation piece: Small (liquid pipe) i Insulation piece: Large (gas pipe) j Wire for common power supply FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 46: About The Units And Options

    To avoid condensation and water dripping out of the unit. If the temperature or the humidity is beyond these conditions, safety devices may be put in action and the air conditioner may not operate. FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 47: System Layout

    Refrigerant piping + interconnection cable g Drain pipe h Earth wiring 15.4 Combining units and options INFORMATION Certain options may NOT be available in your country. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 48: Possible Options For The Indoor Unit

    Make sure you have the following mandatory options: ▪ User interface: Wired or wireless ▪ Air inlet panel and canvas connection for the air inlet panel (in case of bottom suction). FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 49: Unit Installation

    For units using the R32 refrigerant it is necessary to keep any required ventilation openings clear of obstructions. Do NOT install the unit in the following places: FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 50 Protective guards. Make sure to install protective guards on the suction and discharge side to prevent somebody from touching the fan blades or heat exchanger. ▪ Use suspension bolts for installation. ▪ Spacing. Mind the following requirements: ≥300 FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 51: Mounting The Indoor Unit

    Depending on the field conditions, it might be easier to install the optional equipment first. ▪ In case of installation with duct, but no duct service opening. Modify the position of the air filters. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 52 Canvas connection for air inlet panel (field supply) INFORMATION The unit can be used with bottom suction by replacing the interchangeable plate by the air filter holding plate. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 53 Suspension bolt spacing ▪ Installation example: a Anchor b Ceiling slab c Long nut or turn-buckle d Suspension bolt e Indoor unit ▪ Install the unit temporarily. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 54: Guidelines When Installing The Ducting

    Air inlet side. Attach the duct and intake-side flange (field supply). For connecting the flange, use 7 accessory screws. a Connection screw (accessory) b Flange (field supply) c Main unit d Insulation (field supply) FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 55: Guidelines When Installing The Drain Piping

    Use hanging bars as shown. 1~1.5 m a Hanging bar Allowed Not allowed ▪ Condensation. Take measures against condensation. Insulate the complete drain piping in the building. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 56 5 Wind the large sealing pad (= insulation) around the metal clamp and drain hose, and fix it with cable ties. 6 Connect the drain piping to the drain hose. FDA125A5VEB Installer and user reference guide Split system air conditioners...
  • Page 57 When installation of the system is not yet completed 1 Temporarily connect electrical wiring. 2 Remove the switch box cover (a). FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 58 2 Gradually pour approximately 1 l of water through the water inlet, and check for leaks (see "When installation of the system is not yet completed" [  57]). FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 59: Piping Installation

    Annealed (O) Depending on the applicable legislation and the maximum working pressure of the unit (see "PS High" on the unit name plate), larger piping thickness might be required. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 60: Refrigerant Piping Insulation

    17.2.2 Precautions when connecting the refrigerant piping INFORMATION Also read the precautions and requirements in the following chapters: ▪ "2 General safety precautions" [  7] ▪ "17.1 Preparing refrigerant piping" [  59] DANGER: RISK OF BURNING/SCALDING FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 61: Guidelines When Connecting The Refrigerant Piping

    Coat the flare inner surface with ether oil or ester oil when connecting a flare nut. Tighten 3 or 4 turns by hand, before tightening firmly. ▪ ALWAYS use 2 wrenches together when loosening a flare nut. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 62: Pipe Bending Guidelines

    4 Flare the pipe. Set exactly at the position as shown in the following figure. Flare tool for R410A or Conventional flare tool R32 (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 FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 63: To Connect The Refrigerant Piping To The Indoor Unit

    4 Wrap the sealing pad from the base of the unit to the top of the flare nut. NOTICE Make sure to insulate all refrigerant piping. Any exposed piping might cause condensation. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 64: Electrical Installation

    ALWAYS use multicore cable for power supply cables. INFORMATION Also read the precautions and requirements in the "2  General safety precautions" [  7]. INFORMATION Also read "18.1.3 Specifications of standard wiring components" [  67]. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 65: Guidelines When Connecting The Electrical Wiring

    1 Strip insulation (20 mm) from the wires. 2 Slightly twist the end of the conductor to create a "solid-like" connection. Method 2: Using round crimp-style terminal FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 66 Curled wire (single-core or twisted stranded conductor wire) b Screw c Flat washer Stranded conductor wire with round crimp-style terminal a Terminal b Screw c Flat washer Allowed NOT allowed FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 67: Specifications Of Standard Wiring Components

    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. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 68 1 2 3 1 2 3 ▪ When using 2 user interfaces 1 2 3 1 2 3 ▪ When using group control Dashed line represents separate power supply. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 69 FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 70 Electrical installation a Wire for common power supply (accessory) FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • 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: To Perform A Test Run

    ▪ See the service manual for the complete list of error codes and a detailed troubleshooting guideline for each error. NOTICE Do NOT interrupt the test run. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 73: Configuration

    • M: Mode number – First number: for group of units – Number between brackets: for individual unit • SW: Setting number / C1: First code number • —: Value number / C2: Second code number • : Default FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 74 • M: Mode number – First number: for group of units – Number between brackets: for individual unit • SW: Setting number / C1: First code number • —: Value number / C2: Second code number • : Default FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 75: Hand-Over To The User

    Explain the user how to properly operate the system and what to do in case of problems. ▪ Show the user what to do for the maintenance of the unit. FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 76: Troubleshooting

    Malfunction of gas pipe thermistor for heat exchanger Malfunction of gas pipe thermistor for heat exchanger Malfunction of suction air thermistor Malfunction of discharge air thermistor Room temperature thermistor in remote controller abnormality FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 77: Disposal

    Do NOT try to dismantle the system yourself: dismantling of the system, treatment of the refrigerant, oil and other parts MUST comply with applicable legislation. Units MUST be treated at a specialised treatment facility for reuse, recycling and recovery. FDA125A5VEB Installer and user reference guide Split system air conditioners...

  • Page 78: Technical Data

    Technical data 24 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). 24.1 Wiring diagram 24.1.1 Unified wiring diagram legend...
  • Page 79 PCB* Printed circuit board Power module Switching power supply PTC* PTC thermistor Insulated gate bipolar transistor (IGBT) Circuit breaker Q*DI, KLM Earth leak circuit breaker Overload protector FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...
  • Page 80 (IGBT) power module Wireless remote controller Terminal Terminal strip (block) Electronic expansion valve coil Y*R, Y*S Reversing solenoid valve coil Ferrite core ZF, Z*F Noise filter FDA125A5VEB Installer and user reference guide Split system air conditioners 4P495031-1B – 2022.10...

  • Page 81: 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 84 4P495031-1B 2022.10 Verantwortung für Energie und Umwelt...

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