Daikin Room Air Conditioner Installation Manual

1 About the Documentation

1.1 About this document

ℹ️ INFORMATION: Ensure the user has the printed documentation and keeps it for future reference.

Target Audience: Authorised Installers

ℹ️ INFORMATION: This appliance is intended for use by expert or trained users in shops, light industry, farms, or for commercial and household use by lay persons.

⚠️ WARNING: Installation, servicing, maintenance, repair, and applied materials must follow Daikin instructions, comply with applicable legislation, and be performed by qualified persons. In Europe and areas where IEC standards apply, EN/IEC 60335-2-40 is the applicable standard.

Documentation Set: This document is part of a set, which includes:

• General safety precautions: Safety instructions to read before installing (Paper, in the indoor unit box).
• Indoor unit installation manual: Installation instructions (Paper, in the indoor unit box).
• Installer reference guide: Preparation, good practices, reference data (Digital files available at http://www.daikineurope.com/support-and-manuals/product-information/).

Latest revisions may be available on the regional Daikin website or from your dealer. The original documentation is in English; all other languages are translations.

Technical Engineering Data: A subset is available on the regional Daikin website (publicly accessible). The full set requires authentication via the Daikin Business Portal.

2 Specific Installer Safety Instructions

Always observe the following safety instructions and regulations.

Unit Installation: Refer to "5 Unit installation" [Page 4].

⚠️ WARNING: Installation must be done by an installer. Material choice and installation must comply with applicable legislation. In Europe, EN378 is the applicable standard.

3 About the Box

⚠️ WARNING: Store the appliance to prevent mechanical damage and ensure it is in a well-ventilated room without ignition sources (open flames, operating gas/electric heaters). Room size must meet General Safety Precautions.

❗ CAUTION: For walls with metal frames or metal boards, use a wall embedded pipe and wall cover in the feed-through hole to prevent heat, electrical shock, or fire.

Piping Installation: Refer to "6 Piping installation" [Page 7].

❗ CAUTION: Piping and joints of a split system must be permanent joints inside occupied spaces, except for joints directly connecting to indoor units.

DANGER: RISK OF BURNING/SCALDING

❗ NOTICE: Use the flare nut fixed to the unit. Apply refrigeration oil ONLY to the inside of the flare to prevent gas leakage. Use refrigeration oil for R32 (FW68DA). Do NOT reuse joints.

❗ NOTICE: Do NOT use mineral oil on flared parts. NEVER install a drier to this R32 unit. The drying material can damage the system.

❗ NOTICE: Incomplete flaring may cause refrigerant gas leakage. Use new flares to prevent leakage. Use only supplied flare nuts.

Electrical Installation: Refer to "7 Electrical installation" [Page 7].

DANGER: RISK OF ELECTROCUTION

⚠️ WARNING: Always use multicore cable for power supply cables.

⚠️ WARNING: All wiring must be performed by an authorised electrician and comply with applicable legislation. Make electrical connections to the fixed wiring. On-site components and electrical construction must comply with applicable legislation.

⚠️ WARNING: If the power supply has a missing or wrong N-phase, equipment may break down. Establish proper earthing. Do NOT earth to utility pipes, surge absorbers, or telephone earths. Incomplete earthing can cause electrical shock. Install required fuses or circuit breakers.

⚠️ WARNING: Secure electrical wiring with cable ties to avoid contact with sharp edges or hot piping. Do NOT use taped wires, stranded conductor wires, extension cords, or star system connections, as they can cause overheating, shock, or fire. Do NOT install a phase advancing capacitor as the unit has an inverter.

⚠️ WARNING: Use an all-pole disconnection type breaker with at least 3 mm contact gap for overvoltage category III.

⚠️ WARNING: If the supply cord is damaged, it must be replaced by the manufacturer, service agent, or similarly qualified persons.

⚠️ WARNING: Do NOT connect power supply directly to the indoor unit; this could cause electrical shock or fire.

⚠️ WARNING: Do NOT use locally purchased electrical parts. Do NOT branch power supply for drain pump etc. from the terminal block.

⚠️ WARNING: Keep interconnection wiring away from hot copper pipes without thermal insulation.

3.1 Indoor unit

Upon delivery, check the unit for damage and report any damage immediately to the carrier's claims agent. Move the packed unit as close as possible to its final installation position to prevent transport damage.

3.1.1 To remove the accessories from the indoor unit

1. Remove:
   • The accessory bag from the bottom of the package.
   • The mounting plate attached to the back of the indoor unit.
   • The spare SSID sticker from the front grille.

4 About the Unit

Unit Components:

The indoor unit includes the following components:

• a: Installation manual
• b: Operation manual
• c: General safety precautions
• d: Titanium apatite deodorising filter and silver particle filter (Ag-ion filter)
• e: Indoor unit fixing screw (M4×12L)
• f: Dry battery AAA.LR03 (alkaline) for the wireless remote control
• g: Wireless remote control with holder
• h: Mounting plate (attached to the unit)
• i: Screw cover
• j: Spare SSID sticker with release paper (attached to the unit)

❗ NOTICE: Keep the spare SSID sticker in a safe place for future use, e.g., if the front grille is replaced.

⚠️ WARNING: MILDLY FLAMMABLE MATERIAL. The refrigerant inside this unit is mildly flammable.

4.1 Operation Range

Use the system within the following temperature and humidity ranges for safe and effective operation:

ℹ️ (a) A safety device might stop operation if the unit runs outside its range.

ℹ️ (b) Condensation and water dripping may occur if the unit runs outside its range.

4.2 About the Wireless LAN

For detailed specifications, installation instructions, setting methods, FAQ, and the latest manual version, visit app.daikineurope.com.

ℹ️ INFORMATION: Daikin Industries Czech Republic s.r.o. declares that this radio equipment complies with Directive 2014/53/EU. This unit is considered combined equipment under this directive.

4.2.1 Precautions when using the wireless LAN

Do NOT use near:

• Medical equipment (e.g., pacemakers, defibrillators) as this product may cause electromagnetic interference.
• Auto-control equipment (e.g., automatic doors, fire alarm equipment) as this product may cause faulty behaviour.
• Microwave ovens, as they may affect wireless LAN communications.

4.2.2 Basic Parameters

5 Unit Installation

ℹ️ INFORMATION: Refer to the installer reference guide for procedures on opening/closing unit parts like the front panel, electrical wiring box, or front grille.

⚠️ WARNING: Installation must be done by an installer, complying with applicable legislation. In Europe, EN378 is the applicable standard.

5.1 Preparing the Installation Site

⚠️ WARNING: Store the appliance to prevent mechanical damage and ensure it is in a well-ventilated room without ignition sources (open flames, operating gas/electric heaters). Room size must meet General Safety Precautions.

5.1.1 Installation Site Requirements of the Indoor Unit

ℹ️ The sound pressure level is less than 70 dBA.

• Air flow: Ensure nothing blocks the air flow.
• Drainage: Ensure condensation water can be evacuated properly.
• Wall insulation: If wall conditions exceed 30°C and 80% relative humidity, or if fresh air is inducted into the wall, additional insulation (min. 10 mm polyethylene foam) is required.
• Wall strength: Verify the wall or floor is strong enough to support the unit's weight. Reinforce if necessary.
• Spacing: Install the unit at least 1.8 m from the floor. Maintain required distances from walls and ceiling.

5.2 Mounting the Indoor Unit

5.2.1 To install the mounting plate

1. Temporarily install the mounting plate.
2. Level the mounting plate.
3. Mark drilling points on the wall using a tape measure, aligning the end with the symbol "<0xE2><0x96><0xB8>".
4. Secure the mounting plate to the wall using M4×25L screws (field supply).

ℹ️ The removed pipe port cover can be stored in the mounting plate pocket.

Diagram Description (Mounting Plate): The diagram shows the mounting plate with dimensions and fixing points. Key labels include:

• a: Recommended mounting plate fixing spots
• b: Pocket for the pipe port cover
• c: Liquid pipe end
• d: Gas pipe end
• e: Tape measure positioning guide
• f: Tabs for spirit level
• g: Unit center
• h: Hole for embedded piping (Ø65 mm)
• i: Value for tape measure
• j: Position for tape measure at symbol "<0xE2><0x96><0xB8>"
• k: Drain hose
• l: Liquid pipe
• m: Gas pipe

5.2.2 To drill a wall hole

❗ CAUTION: For walls with metal frames or metal boards, use a wall embedded pipe and wall cover in the feed-through hole to prevent heat, electrical shock, or fire.

❗ NOTICE: Seal gaps around pipes with sealing material (field supply) to prevent water leakage.

1. Bore a 65 mm feed-through hole in the wall, sloped downwards towards the outside.
2. Insert a wall embedded pipe into the hole.
3. Insert a wall cover into the wall pipe.

Diagram Description (Wall Hole): Shows a cross-section of the wall hole with embedded pipe and cover. Labels: a - Wall embedded pipe, b - Putty, c - Wall hole cover.

5.2.3 To remove the pipe port cover

ℹ️ To connect piping on the right-side, right-bottom, left-side, or left-bottom, the pipe port cover MUST be removed.

1. Cut the pipe port cover from inside the front grille using a coping saw.
2. Remove any burrs with a half-round needle file.

❗ NOTICE: Do NOT use nippers to remove the pipe port cover, as this could damage the front grille.

5.3 Connecting the Drain Piping

5.3.1 To connect the piping on right side, right-back, or right-bottom

ℹ️ The factory default is right-side piping. For left-side piping, remove piping from the right side and install on the left.

1. Attach the drain hose with adhesive vinyl tape to the bottom of the refrigerant pipes.
2. Wrap the drain hose and refrigerant pipes together using insulation tape.

Diagram Description (Right-side Piping): Shows drain hose and pipes. Labels: A - Right-side piping, B - Right-bottom piping, C - Right-back piping. 'a' indicates where to remove the pipe port cover for right-side piping, 'b' for right-bottom piping.

5.3.2 To connect the piping on left side, left-back, or left-bottom

ℹ️ The factory default is right-side piping. For left-side piping, remove piping from the right side and install on the left.

1. Remove the insulation fixing screw on the right side and remove the drain hose.
2. Remove the drain plug on the left side and attach it to the right side.

❗ NOTICE: Do NOT apply lubricating oil to the drain plug when inserting it, as it may deteriorate and cause leakage.

3. Insert the drain hose on the left side and tighten it with the fixing screw to prevent water leakage.
4. Attach the drain hose to the refrigerant piping bottom side using adhesive vinyl tape.

Diagram Description (Left-side Piping): Shows drain hose and pipes. Labels: A - Left-side piping, B - Left-back piping, C - Left-bottom piping. 'a' indicates where to remove the pipe port cover for left-side piping, 'b' for left-bottom piping.

5.3.3 To check for water leaks

1. Remove the air filters.
2. Pour approximately 1 liter of water into the drain pan and check for leaks.

6 Piping Installation

6.1 Preparing Refrigerant Piping

6.1.1 Refrigerant Piping Requirements

❗ CAUTION: Piping and joints of a split system must be permanent joints inside occupied spaces, except for joints directly connecting to indoor units.

❗ NOTICE: Piping and pressure-containing parts must be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper. Foreign materials inside pipes (including fabrication oils) must be ≤30 mg/10 m.

Refrigerant Piping Diameter:

Use the same diameters as the connections on the outdoor units:

Refrigerant Piping Material:

• Piping material: Phosphoric acid deoxidised seamless copper.
• Flare connections: Use only annealed material.

Piping Temper Grade and Thickness:

ℹ️ (a) Depending on applicable legislation and maximum working pressure, larger piping thickness may be required.

6.1.2 Refrigerant Piping Insulation

Use polyethylene foam insulation material with:

• Heat transfer rate between 0.041 and 0.052 W/mK.
• Heat resistance of at least 120°C.

If temperature > 30°C and humidity > 80% RH, use insulation material of at least 20 mm thickness to prevent condensation.

6.2 Connecting the Refrigerant Piping

DANGER: RISK OF BURNING/SCALDING

6.2.1 To connect the refrigerant piping to the indoor unit

⚠️ WARNING: MILDLY FLAMMABLE MATERIAL. The refrigerant inside this unit is mildly flammable.

• Pipe length: Keep refrigerant piping as short as possible.
• Connect refrigerant piping using flare connections.
• Wrap the refrigerant piping connection using vinyl tape, overlapping at least half the width of the tape. Keep the slit of the heat insulation pipe cover facing up. Avoid wrapping the tape too tightly.

Diagram Description (Piping Connection): Shows components of the connection:

• a: Heat insulation pipe cover (indoor unit side)
• b: Flare connections
• c: Liquid pipe (with insulation)
• d: Gas pipe (with insulation)
• e: Slit on heat insulation pipe cover
• f: Vinyl tape

Insulate the refrigerant piping, interconnection cable, and drain hose as per "8.1 To insulate the drain piping, refrigerant piping and interconnection cable" [Page 9].

❗ NOTICE: Ensure all refrigerant piping is insulated. Exposed piping may cause condensation.

7 Electrical Installation

DANGER: RISK OF ELECTROCUTION

⚠️ WARNING: Always use multicore cable for power supply cables.

⚠️ WARNING: Use an all-pole disconnection type breaker with at least 3 mm contact gap for overvoltage category III.

⚠️ WARNING: If the supply cord is damaged, it must be replaced by the manufacturer, service agent, or similarly qualified persons.

⚠️ WARNING: Do NOT connect power supply directly to the indoor unit; this could cause electrical shock or fire.

⚠️ WARNING: Do NOT use locally purchased electrical parts. Do NOT branch power supply for drain pump etc. from the terminal block.

⚠️ WARNING: Keep interconnection wiring away from hot copper pipes without thermal insulation.

7.1 Specifications of Standard Wiring Components

7.2 To connect the electrical wiring to the indoor unit

Electrical work must comply with the installation manual and national electrical wiring rules.

1. Set the indoor unit on the mounting plate hooks, using the "<0xE2><0x96><0xB8>" marks as a guide.
2. Open the front panel and service cover (refer to Installer reference guide).
3. Pass the interconnection cable from the outdoor unit through the wall hole, into the back of the indoor unit, and out the front.
4. Bend the cable end upwards.
5. Strip wire ends approximately 15 mm.
6. Match wire colours to terminal numbers on the indoor unit terminal blocks and screw wires firmly.
7. Connect the earth wire to its terminal.
8. Firmly tighten wires with terminal screws.
9. Pull wires to ensure they are secure, then retain with the wire retainer.
10. Shape wires so the service cover fits securely, then close the cover.

❗ NOTICE: Keep power line and transmission line apart. They may cross but not run parallel. Maintain at least 50 mm distance between them to avoid electrical interference.

Diagram Description (Wiring Connection): Shows the indoor unit's internal wiring area:

• a: Terminal block
• b: Electrical component block
• c: Cable clamp

Diagram Description (Unit Setup): Shows unit placement on mounting plate:

• a: Mounting plate (accessory)
• b: Packing material piece
• c: Interconnection cable
• d: Wire guide

ℹ️ Support the unit with a piece of packing material.

7.3 To connect optional accessories (wired user interface, central user interface, etc.)

1. Remove the electrical wiring box cover if necessary (refer to Installer reference guide).
2. Attach the connection cable to the S21 connector and pull the wire harness as shown.
3. Replace the electrical wiring box cover and route the wire harness as shown.

8 Finishing the Indoor Unit Installation

8.1 To insulate the drain piping, refrigerant piping and interconnection cable

After completing wiring, refrigerant piping, and drain piping, seal the gap with putty.

1. Wrap the refrigerant piping, interconnection cable, and drain hose together using insulation tape. Overlap at least half the width of the tape with each turn.

Diagram Description (Insulation): Shows the components being wrapped:

• a: Slit
• b: Heat insulation pipe cover
• c: Liquid pipe
• d: Gas pipe
• e: Drain pipe
• f: Interconnection wire
• g: Insulation tape
• h: Vinyl tape

8.2 To pass the pipes through the wall hole

1. Shape the refrigerant pipes along the pipe path marking on the mounting plate.
2. Pass the drain hose and refrigerant piping through the wall hole and seal the gap with putty.

❗ NOTICE: Do NOT bend refrigerant pipes. Do NOT push refrigerant pipes onto the bottom frame or front grille.

Diagram Description (Pipe Routing): Illustrates pipe routing and sealing:

• a: Drain hose
• b: Caulk with putty or caulking material
• c: Adhesive vinyl tape
• d: Insulation tape
• e: Mounting plate (accessory)

8.3 To fix the unit on the mounting plate

1. Set the indoor unit onto the mounting plate hooks, using the "<0xE2><0x96><0xB8>" marks as a guide.
2. Press the bottom frame of the unit with both hands to seat it on the bottom hooks of the mounting plate. Ensure wires are not squeezed.
3. Press the bottom edge of the indoor unit with both hands until it firmly engages with the mounting plate hooks.
4. Secure the indoor unit to the mounting plate using 2 indoor unit fixing screws M4×12L (accessory).

❗ Note: Ensure the interconnection cable does NOT get caught in the indoor unit.

9 Commissioning

❗ NOTICE: A general commissioning checklist is available on the Daikin Business Portal. This checklist complements the instructions in this chapter and serves as a guideline and reporting template.

❗ NOTICE: ALWAYS operate the unit with thermistors and/or pressure sensors/switches. Failure to do so may result in compressor burnout.

9.1 Checklist before commissioning

After installation, check the following items:

• Unit is closed.
• Unit is powered up.
• Complete installation instructions have been read (Installer reference guide).
• Indoor units are properly mounted.
• Outdoor unit is properly mounted.
• Air inlet/outlet are NOT obstructed.
• No missing phases or reversed phases.
• Refrigerant pipes (gas and liquid) are thermally insulated.
• Drainage flows smoothly (potential condensate drip).
• System is properly earthed and earth terminals are tightened.
• Fuses or protection devices are installed correctly and not bypassed.
• Power supply voltage matches the unit's identification label.
• Specified wires are used for the interconnection cable.
• Indoor unit receives signals from the user interface.
• No loose connections or damaged electrical components in the switch box.
• Compressor insulation resistance is OK.
• No damaged components or squeezed pipes inside indoor/outdoor units.
• No refrigerant leaks.
• Correct pipe size is installed and pipes are properly insulated.
• Stop valves (gas and liquid) on the outdoor unit are fully open.

9.2 To perform a test run

Prerequisites: Power supply must be within the specified range. Test run can be performed in cooling or heating mode. Follow the operation manual for functions and parts check.

1. In cooling mode, select the lowest programmable temperature. In heating mode, select the highest. Test run can be disabled if necessary.
2. After the test run, set temperature to normal levels (Cooling: 26~28°C, Heating: 20~24°C).
3. The system stops operating 3 minutes after being turned OFF.

9.2.1 To perform a test run using the wireless remote control

1. Press <0xE2><0x96><0xB8> to enter the main menu. Navigate to "Wireless remote control settings menu" using < and >. Press <0xE2><0x96><0xB8> to enter.
2. Navigate to "Software and version" screen using < and >.
3. Press and hold <0xE2><0x96><0xB8> for at least 5 seconds to enter "Self-diagnosis menu".
4. In "Self-diagnosis menu", navigate to "Test run menu" using < and >.
5. Press <0xE2><0x96><0xB8> to enter the menu.
6. Change status to ON using < and >.
7. Press <0xE2><0x96><0xB8> to confirm.

Result: The indoor unit enters test run mode. Normal operation is not possible during this time.

Test Run Status:

• Test run OFF
• Test run ON
• During test run

Result: Test run operation stops automatically after approximately 30 minutes. It also stops if the ON/OFF button is pressed.

Result: The indoor units leave test operation mode.

9. Check the function of operation modes.

ℹ️ INFORMATION: Econo, Outdoor unit silent, Powerful operation, and temperature setpoint cannot be changed during test run.

10 Configuration & 11 Troubleshooting & 12 Disposal

10 Configuration

ℹ️ INFORMATION: For field settings, refer to the user reference guide or the service manual.

ℹ️ See the service manual for:

• The complete list of error codes.
• A more detailed troubleshooting guideline for each error.

11 Troubleshooting

11.1 Solving problems based on error codes

Fault diagnosis by the wireless remote control

If the unit has a problem, identify the fault by checking the error code via the wireless remote control. Understand the problem and take corrective measures before resetting the error code. This should be done by a licensed installer or local dealer.

To check the error code by the wireless remote control:

1. Press <0xE2><0x96><0xB8> to enter the main menu. Navigate to "Wireless remote control settings menu" using < and >. Press <0xE2><0x96><0xB8> to enter.
2. Navigate to "Software and version" screen using < and >.
3. Press and hold <0xE2><0x96><0xB8> for at least 5 seconds to enter "Self-diagnosis menu".
4. In "Self-diagnosis menu", navigate to the error code indication screen using < and >. Press <0xE2><0x96><0xB8> to confirm.
5. Aim the wireless remote control at the unit and scroll through the list of error codes using < and > until a long beep is heard.

Result: A long beep indicates the corresponding error code.

7. Press <0xE2><0x96><0xB8> to return to the home screen or press <0xE2><0x96><0xB8> to return to the self-diagnosis menu.

Check the error code history. If required, solve the cause of the errors and perform the test operation again.

ℹ️ INFORMATION: Test run is only completed if the indoor unit does not report any error code. Refer to the service manual for a complete list of error codes and detailed troubleshooting guidelines.

12 Disposal

❗ NOTICE: Do NOT attempt to dismantle the system yourself. Dismantling, refrigerant treatment, oil, and other parts MUST comply with applicable legislation. Units MUST be treated at a specialized facility for reuse, recycling, and recovery.

13 Technical Data

A subset of the latest technical data is available on the regional Daikin website (publicly accessible). The full set requires authentication via the Daikin Business Portal.

13.1 Wiring Diagram

The wiring diagram is delivered with the unit, located on the inner right side of the indoor unit front grille.

13.1.1 Unified Wiring Diagram Legend

Refer to the unit's wiring diagram for applied parts and numbering. Part numbering is by Arabic numbers in ascending order.

Wire Colours:

Technical Data Symbols: