FTXS / CTXS - FTXS-G - FTXS20K - FTXS25K - FTXS35K - FTXS42K - FTXS50K - FTXS71G - Wall air conditioner DAIKIN - Free user manual and instructions

Product type	Wall-mounted air conditioner (split system)
Brand	Daikin
Compatible models	FTXS20K, FTXS25K, FTXS35K, FTXS42K, FTXS50K, FTXS71G, CTXS, FTXS-G
Indoor unit dimensions (HxWxD)	Approx. 283 x 770 x 228 mm (depending on model)
Outdoor unit dimensions (HxWxD)	Approx. 550 x 765 x 285 mm (depending on model)
Indoor unit weight	Approx. 8 kg
Outdoor unit weight	Approx. 35 kg
Power supply	220-240 V ~ 50 Hz, single-phase
Cooling capacity	From 2.0 to 7.1 kW depending on model
Heating capacity	From 2.5 to 8.0 kW depending on model
Energy class	A++ to A+ depending on model
Refrigerant	R32 (or R410A depending on model)
Main functions	Cooling, heating, ventilation, dehumidification, night mode, timer, self-diagnosis
Remote control	Wireless, included
Air filter	Washable, anti-dust
Noise level (indoor unit)	19 to 46 dB(A) depending on model and speed
Noise level (outdoor unit)	46 to 54 dB(A) depending on model
Maximum piping length	15 m (depending on model)
Maintenance and cleaning	Clean the filter every 2 weeks; do not use abrasives
Safety	Automatic shut-off in case of overload, anti-freeze protection
Spare parts and repairability	Available via Daikin authorized network; repairability index not disclosed
Warranty	5 years (depending on country and installation conditions)

Frequently Asked Questions - FTXS / CTXS - FTXS-G - FTXS20K - FTXS25K - FTXS35K - FTXS42K - FTXS50K - FTXS71G DAIKIN

How to clean the filter of my Daikin FTXS air conditioner?

Turn off the unit, open the front panel, remove the filter, wash it with warm water (no detergent), dry it and put it back. Clean every 2 weeks.

What to do if the remote control does not work?

Check the batteries (remove the back cover, replace with new AAA batteries). Make sure there is no obstacle between the remote and the indoor unit. If the problem persists, reset the device by unplugging the power for 5 minutes.

What is the ideal temperature for heating in winter?

Daikin recommends 20 °C for a good comfort/consumption balance. Avoid exceeding 26 °C in summer for cooling.

Can I install the air conditioner myself?

No, installation must be carried out by a qualified professional (refrigeration technician). Poor installation can lead to gas leaks, malfunctions or electrical hazards.

How to use the timer to schedule a shut-off?

Press the 'TIMER' button on the remote, select 'OFF' (shut-off), set the desired time (e.g., 2h), confirm. The unit will turn off automatically after that period.

What does error code 'U4' on the display mean?

Code U4 indicates a communication fault between the indoor and outdoor unit. Check the electrical connections and linking cables. If the problem persists, contact a Daikin authorized technician.

The air conditioner blows cold air in heating mode, is this normal?

Yes, in heating mode, the unit may blow slightly cold air at first to avoid hot air drafts. After a few minutes, the air becomes warm. If it lasts too long, check the mode setting or contact customer service.

How to switch from cooling mode to heating mode?

On the remote, press the 'MODE' button to cycle through modes: Cool, Heat, Dry, Fan. Select 'Heat' for heating. Make sure the heat pump is compatible (reversible models).

How often should a Daikin air conditioner be serviced?

An annual inspection by a professional is recommended to check the refrigerant circuit tightness, clean the exchangers and check the electrical components.

How to reduce the noise of the outdoor unit?

Make sure the unit is installed on a stable and flat surface. Check that there are no obstacles blocking the ventilation. If the noise is abnormal, have the fastenings or compressor checked by a professional.

USER MANUAL FTXS / CTXS - FTXS-G - FTXS20K - FTXS25K - FTXS35K - FTXS42K - FTXS50K - FTXS71G DAIKIN

Daikin Industries Czech Republic s.r.o.

3MXM40M2V1B, 3MXM52M2V1B, 3AMXM52M2V1B,

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• Maximum allowable pressure (PS) (bar) • Minimum maximum absolute pressure (TS) • Tmin: Minimum temperature of low pressure side: (℃) (T) • Tmax: Saturated temperature corresponding with the maximum absolute pressure (PS) (℃) (T) • Refrigerant (℃) • Setting of pressure safety device: (bar) • Manufacturing number and manufacturing year: refer to model number(s) (T) • Maxima maxima (PS) (bar) • Temporise minimum maximum acte (TS) • Temporise minimum maxima base pressure: (℃) (T) • Temporise temperature corresponding à la pressiun maximale acte (PS) (℃) (T) • Kallimet (℃) • Enstehung der Schutzverhältnis: (bar) • Higbeleitungen und Herstellung: (bar) (T) • Pission maxima aktive (PS) (bar) • Temporise minimum maxima acte (TS) • Temporise minimum minima ete (℃) (T) • Nucleo de fabricacion y/o de fabricacion: consta de peoples de fabricacion del modelo (CS) (T) • Rokalmia (℃) • Intervening du vino/boiling (bar) (T) • Frotto/agentes en fabricagirne: zie naoiajal mode • Peso maximo admissible (PS) (bar) • Temporise minimao admissivo (TS) • Temporise minimao anumang lagerutide (℃) (T) • Temposo varidicoce tereovernment do empero da Dadecon (CS) (T) • Rokalmia (℃) • Auste del presostato o segudacr: (bar) (T) • Numero de fabricacion y/o de fabricacion: consta de peoples de Pricen (T) (T) • Rokalmia (℃)

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01

• Maximum allowable pressure (PS) (bar) • Minimum maximum absolute pressure (TS) • Tmin: Minimum temperature of low pressure side: (℃) (T) • Tmax: Saturated temperature corresponding with the maximum absolute pressure (PS) (℃) (T) • Refrigerant (℃) • Setting of pressure safety device: (bar) • Manufacturing number and manufacturing year: refer to model number(s) (T) • Maxima maxima(PS) (bar) • Temporise minimum maximum acte (TS) • Temporise minimum base pressure: (℃) (T) • Temporise temperature corresponding à la pressiun maximale acte (PS) (℃) (T) • Kallimet (℃) • Enstehung der Schutzverhältnis: (bar) • Higbeleitungen und Herstellung: (bar) (T) • Pission maxima aktive (PS) (bar) • Temporise minimum maximum acte (TS) • Temporise minimum minima ete (℃) (T) • Temporise temperature corresponding à la pressiun maximale acte (PS) (℃) (T) • Rokalmia (℃) • Intervening du vino/boiling (bar) (T) • Frotto/agentes en fabricagirne: zie naoiajal mode • Peso maximo admissible (PS) (bar) • Temporise minimao admissivo (TS) • Temporise minimao anumang lagerutide (℃) (T) • Temporise temperature corresponding à la pressiun maximale acte (PS) (℃) (T) • Rokalmia (℃) • Auste del presostato o segudacr: (bar) (T) • Numero de fabricacion y/o de fabricacion: consta de peoples de Pricen (T) (T) • Rokalmia (℃)

02

• Pressure maxima certificacao (PS) (bar) • Temperature minima certificacao (TS) • Tmin: Temperature minima melo ate biseque (PS) (℃) • Tmin: Temperature sature corresponding a presiun maxima certificacao (PS) (℃) • Refrigerant (℃) • Regiao de 100 kg m3/min (T) • Regiao de 100 kg m3/min (T) • Regiao de 100 kg m3/min (T) • Regiao de 100 kg m3/min (T) • Rokalmia (℃) • Intervening du vino/boiling (bar) (T) • Frotto/agentes en fabricagirne: zie naoiajal mode • Peso maxima acte (PS) (bar) • Temporise minimao acte (TS) • Temporise minimao minima ete (℃) (T) • Temporise temperature corresponding à la pressiun maximale acte (PS) (℃) (T) • Rokalmia (℃) • Auste del presostato o segudacr: (bar) (T) • Numero de fabricacion y/o de fabricacion: consta de peoples de Pricen (T) (T) • Rokalmia (℃)

03

• Pressure maxima certificacao (PS) (bar) • Temperature maxima certificacao (TS) • Tmin: Temperature minima melo ate biseque (PS) (℃) • Tmin: Temperature sature corresponding a presiun maxima certificacao (PS) (℃) • Refrigerant (℃) • Regiao de 100 kg m3/min (T) • Regiao de 100 kg m3/min (T) • Regiao de 100 kg m3/mel (T) • Rokalmia (℃) • Intervening du vino/boiling (bar) (T) • Frotto/agentes en fabricagirne: zie naoiajal mode • Peso maxima acte (PS) (bar) • Temporise minimao acte (TS) • Temporise minimao minima ete (℃) (T) • Temporise temperature corresponding à la pressiun- maximale acte (PS) (℃) (T) • Rokalmia (℃) • Auste del presostato o segudacr: (bar) (T) • Numero de fabricacion y/o de fabricacion: consta de peoples de Pricen (T) (T) • Rokalmia (℃)

04

• Pressure maxima certificacao (PS) (bar) • Temperature maxima certificacao (TS) • Tmin: Temperature minima melo ate biseque (PS) (℃) • Tmin: Temperature sature corresponding a presiun maxima certificacao (PS) (℃) • Refrigerant (℃) • Regiao de 100 kg m3/min (T) • Regiao de 100 kgm3/min (T) • Rokalmia (℃) • Intervening du vino/boiling (bar) (T) • Frotto/agentes en fabricagirne: zie naoiajal mode • Peso maxima acte (PS) (bar) • Temporise minimao acte (TS) • Temporise minimao minima ete (℃) (T) • Temporise temperature corresponding à la pressuin- maximale acte (PS) (℃) (T) • Rokalmia (℃) • Auste del presostato o segudacr: (bar) (T) • Numero de fabricacion y/o de fabricacion: consta de peoples de Pricen (T) (T) • Rokalmia (℃)

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• Continuous operation of the system 552

• Continuous operation of the system 553

• Continuous operation of the system 554

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• Continuous operation of the system 556

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• Continuous operation of the system 558

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• Continuous operation of the system 560

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• Continuous operation of the system 565

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• Continuous operation of the system 568

• Continuous operation of the system 569

• Continuous operation of the system 570

• Continuous operation of the system 571

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• Continuous operation of the system 574

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• Continuous operation of the system 577

• Continuous operation of the system 578

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• Continuous operation of the system 581

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• Continuous operation of the system 625

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• Continuous operation of the system 628

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• Continuous operation of the system 631

• Continuous operation of the system 632

• Continuous operation of the system 633

• Continuous operation of the system 634

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• Continuous operation of the system 636

• Continuous operation of the system 637

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• Continuous operation of the system 639

• Continuous operation of the system 640

• Continuous operation of the system 641

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• Continuous operation of the system 643

• Continuous operation of the system 644

• Continuous operation of the system 645

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• Continuous operation of the system 648

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• Continuous operation of the system 650

• Continuous operation of the system 651

• Continuous operation of the system 652

• Continuous operation of the system 653

• Continuous operation of the system 654

• Continuous operation of the system 655

• Continuous operation of the system 656

• Continuous operation of the system 657

• Continuous operation of the system 658

• Continuous operation of the system 659

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• Continuous operation of the system 661

• Continuous operation of the system 662

• Continuous operation of the system 663

• Continuous operation of the system 664

• Continuous operation of the system 665

• Continuous operation of the system 666

• Continuous operation of the system 667

• Continuous operation of the system 668

• Continuous operation of the system 669

• Continuous operation of the system 670

• Continuous operation of the system 671

• Continuous operation of the system 672

• Continuous operation of the system 673

• Continuous operation of the system 674

• Continuous operation of the system 675

• Continuous operation of the system 676

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• Continuous operation of the system 678

• Continuous operation of the system 679

• Continuous operation of the system 680

• Continuous operation of the system 681

• Continuous operation of the system 682

• Continuous operation of the system 683

• Continuous operation of the system 684

• Continuous operation of the system 685

• Continuous operation of the system 686

• Continuous operation of the system 687

• Continuous operation of the system 688

• Continuous operation of the system 689

• Continuous operation of the system 690

• Continuous operation of the system 691

• Continuous operation of the system 692

• Continuous operation of the system 693

• Continuous operation of the system 694

• Continuous operation of the system 695

• Continuous operation of the system 696

• Continuous operation of the system 697

• Continuous operation of the system 698

• Continuous operation of the system 700

• Continuous operation of the system 701

• Continuous operation of the system 702

• Continuous operation of the system 703

• Continuous operation of the system 704

• Continuous operation of the system 705

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• Continuous operation of the system 707

• Continuous operation of the system 708

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• Continuous operation of the system 710

• Continuous operation of the system 711

• Continuous operation of the system 712

• Continuous operation of the system 713

• Continuous operation of the system 714

• Continuous operation of the system 715

• Continuous operation of the system 716

• Continuous operation of the system 717

• Continuous operation of the system 718

• Continuous operation of the system 719

• Continuous operation of the system 720

• Continuous operation of the system 721

• Continuous operation of the system 722

• Continuous operation of the system 723

• Continuous operation of the system 724

• Continuous operation of the system 725

• Continuous operation of the system 726

• Continuous operation of the system 727

• Continuous operation of the system 728

• Continuous operation of the system 729

• Continuous operation of the system 730

• Continuous operation of the system 731

• Continuous operation of the system 732

• Continuous operation of the system 733

• Continuous operation of the system 734

• Continuous operation of the system 735

• Continuous operation of the system 736

• Continuous operation of the system 737

• Continuous operation of the system 738

• Continuous operation of the system 739

• Continuous operation of the system 740

• Continuous operation of the system 741

• Continuous operation of the system 742

• Continuous operation of the system 743

• Continuous operation of the system 744

• Continuous operation of the system 745

• Continuous operation of the system 746

• Continuous operation of the system 747

• Continuous operation of the system 748

• Continuous operation of the system 749

• Continuous operation of the system 750

• Continuous operation of the system 751

• Continuous operation of the system 752

• Continuous operation of the system 753

• Continuous operation of the system 754

• Continuous operation of the system 755

• Continuous operation of the system 756

• Continuous operation of the system 757

• Continuous operation of the system 758

• Continuous operation of the system 759

• Continuous operation of the system 760

• Continuous operation of the system 761

• Continuous operation of the system 762

• Continuous operation of the system 763

• Continuous operation of the system 764

• Continuous operation of the system 765

• Continuous operation of the system 766

• Continuous operation of the system 767

• Continuous operation of the system 768

• Continuous operation of the system 769

• Continuous operation of the system 770

• Continuous operation of the system 771

• Continuous operation of the system 772

• Continuous operation of the system 773

• Continuous operation of the system 774

• Continuous operation of the system 775

• Continuous operation of the system 776

• Continuous operation of the system 777

• Continuous operation of the system 778

• Continuous operation of the system 779

• Continuous operation of the system 780

• Continuous operation of the system 781

• Continuous operation of the system 782

• Continuous operation of the system 783

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• Continuous operation of the system 785

• Continuous operation of the system 786

• Continuous operation of the system 787

• Continuous operation of the system 788

• Continuous operation of the system 789

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• Continuous operation of the system 791

• Continuous operation of the system 792

• Continuous operation of the system 793

• Continuous operation of the system 794

• Continuous operation of the system 795

• Continuous operation of the system 796

• Continuous operation of the system 797

• Continuous operation of the system 798

• Continuous operation of the system 799

• Continuous operation of the system 800

• Continuous operation of the system 801

• Continuous operation of the system 802

• Continuous operation of the system 803

• Continuous operation of the system 804

• Continuous operation of the system 805

• Continuous operation of the system 806

• Continuous operation of the system 807

• Continuous operation of the system 808

• Continuous operation of the system 809

• Continuous operation of the system 810

• Continuous operation of the system 811

• Continuous operation of the system 812

• Continuous operation of the system 813

• Continuous operation of the system 814

• Continuous operation of the system 815

• Continuous operation of the system 816

• Continuous operation of the system 817

• Continuous operation of the system 818

• Continuous operation of the system 819

• Continuous operation of the system 820

• Continuous operation of the system 821

• Continuous operation of the system 822

• Continuous operation of the system 823

• Continuous operation of the system 824

• Continuous operation of the system 825

• Continuous operation of the system 826

• Continuous operation of the system 827

• Continuous operation of the system 828

• Continuous operation of the system 829

• Continuous operation of the system 830

• Continuous operation of the system 831

• Continuous operation of the system 832

• Continuous operation of the system 833

• Continuous operation of the system 834

• Continuous operation of the system 835

• Continuous operation of the system 836

• Continuous operation of the system 837

• Continuous operation of the system 838

• Continuous operation of the system 839

• Continuous operation of the system 840

• Continuous operation of the system 841

• Continuous operation of the system 842

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• Continuous operation of the system 844

• Continuous operation of the system 845

• Continuous operation of the system 846

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• Continuous operation of the system 848

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• Continuous operation of the system 850

• Continuous operation of the system 851

• Continuous operation of the system 852

• Continuous operation of the system 853

• Continuous operation of the system 854

• Continuous operation of the system 855

• Continuous operation of the system 856

• Continuous operation of the system 857

• Continuous operation of the system 858

• Continuous operation of the system 859

• Continuous operation of the system 860

• Continuous operation of the system 861

• Continuous operation of the system 862

• Continuous operation of the system 863

• Continuous operation of the system 864

• Continuous operation of the system 865

• Continuous operation of the system 866

• Continuous operation of the system 867

• Continuous operation of the system 868

• Continuous operation of the system 869

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• Continuous operation of the system 901

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• Continuous operation of the system 911

• Continuous operation of the system 912

• Continuous operation of the system 913

• Continuous operation of the system 914

• Continuous operation of the system 915

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• Continuous operation of the system 918

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• Continuous operation of the system 922

• Continuous operation of the system 923

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• Continuous operation of the system 932

• Continuous operation of the system 933

• Continuous operation of the system 934

• Continuous operation of the system 935

• Continuous operation of the system 936

• Continuous operation of the system 937

• Continuous operation of the system 938

• Continuous operation of the system 939

• Continuous operation of the system 940

• Continuous operation of the system 941

• Continuous operation of the system 942

• Continuous operation of the system 943

• Continuous operation of the system 944

• Continuous operation of the system 945

• Continuous operation of the system 946

• Continuous operation of the system 947

• Continuous operation of the system 948

• Continuous operation of the system 949

• Continuous operation of the system 950

• Continuous operation of the system 951

• Continuous operation of the system 952

• Continuous operation of the system 953

• Continuous operation of the system 954

• Continuous operation of the system 955

• Continuous operation of the system 956

• Continuous operation of the system 957

• Continuous operation of the system 958

• Continuous operation of the system 959

• Continuous operation of the system 960

• Continuous operation of the system 961

• Continuous operation of the system 962

• Continuous operation of the system 963

• Continuous operation of the system 964

• Continuous operation of the system 965

• Continuous operation of the system 966

• Continuous operation of the system 967

• Continuous operation of the system 968

• Continuous operation of the system 969

• Continuous operation of the system 970

• Continuous operation of the system 971

• Continuous operation of the system 972

• Continuous operation of the system 973

• Continuous operation of the system 974

• Continuous operation of the system 975

• Continuous operation of the system 976

• Continuous operation of the system 977

• Continuous operation of the system 978

• Continuous operation of the system 979

• Continuous operation of the system 980

• Continuous operation of the system 981

• Continuous operation of the system 982

• Continuous operation of the system 983

• Continuous operation of the system 984

• Continuous operation of the system 985

• Continuous operation of the system 986

• Continuous operation of the system 987

• Continuous operation of the system 988

• Continuous operation of the system 989

• Continuous operation of the system 990

• Continuous operation of the system 991

• Continuous operation of the system 992

• Continuous operation of the system 993

• Continuous operation of the system 994

• Continuous operation of the system 995

• Continuous operation of the system 996

• Continuous operation of the system 997

• Continuous operation of the system 998

• Continuous operation of the system 999

• Continuous operation of the system 1000

• Continuous operation of the system 1010

-

Safety Precautions

Read the precautions in this manual carefully before operating the unit.

This appliance is filled with R32.

• The precautions described herein are classified as WARNING and CAUTION. They both contain important information regarding safety. Be sure to observe all precautions without fail.
• Meaning of WARNING and CAUTION notices

WARNING .... Failure to follow these instructions properly may result in personal injury or loss of life.

CAUTION ....... Failure to observe these instructions properly may result in property damage or personal injury, which may be serious depending on the circumstances.

• The safety marks shown in this manual have the following meanings:

Be sure to follow the instructions.

Be sure to establish an earth connection.

Never attempt.

• After completing installation, conduct a trial operation to check for faults and explain to the customer how to operate the air conditioner and take care of it with the aid of the operation manual.
• The original instructions are written in English. All other languages are translations of the original instructions.

WARNING

• Ask your dealer or qualified personnel to carry out installation work. Do not attempt to install the air conditioner yourself. Improper installation may result in water leakage, electric shocks or fire.
• Install the air conditioner in accordance with the instructions in this installation manual. Improper installation may result in water leakage, electric shocks or fire.
• Be sure to use only the specified accessories and parts for installation work. Failure to use the specified parts may result in the unit falling, water leakage, electric shocks or fire.
• Install the air conditioner on a foundation strong enough to withstand the weight of the unit. A foundation of insufficient strength may result in the equipment falling and causing injury.
• Electrical work must be performed in accordance with relevant local and national regulations and with instructions in this installation manual. Be sure to use a dedicated power supply circuit only. Insufficiency of power circuit capacity and improper workmanship may result in electric shocks or fire.
• Use a cable of suitable length. Do not use tapped wires or an extension lead, as this may cause overheating, electric shocks or fire.
  Make sure that all wiring is secured, the specified wires are used, and that there is no strain on the terminal connections or wires. Improper connections or securing of wires may result in abnormal heat build-up or fire.
• When wiring the power supply and connecting the wiring between the indoor and outdoor units, position the wires so that the control box lid can be securely fastened. Improper positioning of the control box lid may result in electric shocks, fire or over heating terminals.
• If refrigerant gas leaks during installation, ventilate the area immediately. Toxic gas may be produced if the refrigerant comes into contact with fire.
  After completing installation, check for refrigerant gas leakage. Toxic gas may be produced if the refrigerant gas leaks into the room and comes into contact with a source of fire, such as a fan heater, stove or cooker.
• When installing or relocating the air conditioner, be sure to bleed the refrigerant circuit to ensure it is free of air, and use only the specified refrigerant (R32). The presence of air or other foreign matter in the refrigerant circuit causes abnormal pressure rise, which may result in equipment damage and even injury.
• During installation, attach the refrigerant piping securely before running the compressor. If the refrigerant pipes are not attached and the stop valve is open when the compressor is run, air will be sucked in, causing abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.
• During pump-down, stop the compressor before removing the refrigerant piping. If the compressor is still running and the stop valve is open during pump-down, air will be sucked in when the refrigerant piping is removed, causing abnormal pressure in the refrigeration cycle, which may result in equipment damage and even injury.
• Be sure to earth the air conditioner. Do not earth the unit to a utility pipe, lightning conductor or telephone earth lead. Imperfect earthing may result in electric shocks.
• Be sure to install an earth leakage breaker. Failure to install an earth leakage breaker may result in electric shocks or fire.
• Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
• The appliance must be stored in a room without continuously operating ignition sources (for example: open flames, an operating gas appliance or an operating electric heater).

• Do not pierce or burn.

• Be aware that refrigerants may not contain an odour.

• This appliance must be installed, operated and stored in a room larger than the minimum required floor area.
  Comply with national gas regulations.

Safety Precautions

CAUTION

·Do not install the air conditioner at any place where there is a danger of flammable gas leakage. In the event of a gas leakage, build-up of gas near the air conditioner may cause a fire to break out.

·While following the instructions in this installation manual, install drain piping to ensure proper drainage and insulate piping to prevent condensation. Improper drain piping may result in indoor water leakage and property damage.

·Tighten the flare nut according to the specified method such as with a torque wrench. If the flare nut is too tight, it may crack after prolonged use, causing refrigerant leakage.

·Make sure to provide for adequate measures in order to prevent that the outdoor unit be used as a shelter by small animals. Small animals making contact with electrical parts can cause malfunctions, smoke or fire. Please instruct the customer to keep the area around the unit clean.

·The temperature of refrigerant circuit will be high, please keep the inter-unit wire away from copper pipes that are not thermally insulated.

·This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial and household use by lay persons.

·Sound pressure level is less than 70 dB(A).

·The following information shall be provided at an accessible place of the system: -instructions for shutting down the system in case of an emergency -name and address of fire department, police and hospital -name, address and day & night telephone numbers for obtaining service. In Europe, EN378 provides the necessary guidance for this logbook.

Accessories

Accessories supplied with the outdoor unit:

A Installation Manual + R32 Manual	1	B Drain plug It is on the bottom of the packing case.			1
C Reducer assembly It is on the bottom of the packing case.	1
E Refrigerant charge label Contains fluorinated greenhouse gases covered by the Kyoto Protocol R32 ①= kg ②= kg ①+②= kg	1	D Screw bag (For fixing electrical wire anchor bands) It is on the bottom of the packing case.			1
F Multilingual fluorinated greenhouse gases label It is on the bottom of the packing case.	1	G Drain cap (1)	6	H Drain cap (2)	3

Precautions for Selecting the Location

1) Choose a place solid enough to bear the weight and vibration of the unit, where the operation noise will not be amplified.
2) Choose a location where the hot air discharged from the unit or the operation noise will not cause a nuisance to the neighbours of the user.
3) Avoid places near a bedroom and the like, so that the operation noise will cause no trouble.
4) There must be sufficient spaces for carrying the unit into and out of the site.
5) There must be sufficient space for air passage and no obstructions around the air inlet and the air outlet.
6) The site must be free from the possibility of flammable gas leakage in a nearby place.
7) Install units, power cords and inter-unit wire at least 3m away from television and radio sets. This is to prevent interference to images and sounds. (Noises may be heard even if they are more than 3m away depending on radio wave conditions.)
8) In coastal areas or other places with salty atmosphere of sulfate gas, corrosion may shorten the life of the air conditioner.
9) Since water will flow from the drain of the outdoor unit, do not place under the unit anything which must be kept away from moisture.

NOTE

Cannot be installed hanging from ceiling or stacked.

CAUTION

When operating the air conditioner in a low outdoor ambient temperature, be sure to follow the instructions described below.

• To prevent exposure to wind, install the outdoor unit with its suction side facing the wall.
• Never install the outdoor unit at a site where the suction side may be exposed directly to wind.
• To prevent exposure to wind, it is recommended to install a baffle plate on the air discharge side of the outdoor unit.
• In heavy snowfall areas, select an installation site where the snow will not affect the unit.

Indoor/Outdoor Unit Installation Drawings

For installation of the indoor units, refer to the installation manual which was provided with the units.

(The diagram shows a wall-mounted indoor unit.)

CAUTION

• Do not connect the embedded branch piping and the outdoor unit when only carrying out piping work without connecting the indoor unit in order to add another indoor unit later.
  Make sure no dirt or moisture gets into either side of the embedded branch piping.
  See "7 Refrigerant piping work" on page 9 for details.
• It is impossible to connect the indoor unit for one room only. Be sure to connect at least 2 rooms.

Installation

Install the unit horizontally.
- The unit may be installed directly on a concrete verandah or a solid place if drainage is good.
- If the vibration may possibly be transmitted to the building, use a vibration-proof rubber (field supply).

1. Connections (connection port)

Install the indoor unit according to the table below, which shows the relationship between the class of indoor unit and the corresponding port.

The total indoor unit class that can be connected to this unit:

Heat pump type:

3MXM40M* - Up to 7.0kW

4MXM68M* - Up to 11.0kW

3MXM52M* - Up to 9.0kW

4MXM80M* - Up to 14.0kW

3AMXM52M* - Up to 9.0kW

5MXM90M* - Up to 15.5kW

3MXM68M* - Up to 11.0kW

Port	3MXM40M*	3MXM52M*3AMXM52M*
A	15, 20, 25, 35	15, 20, 25, 35, 42
B	# 15, 20, 25, 35	# 15, 20, 25, 35, 42, 50
C	# 15, 20, 25, 35	# 15, 20, 25, 35, 42, 50
Port	3MXM68M*	4MXM68M*
A	15, 20, 25, 35, 42	15, 20, 25, 35, 42
B	# 15, 20, 25, 35, 42, 50, 60	15, 20, 25, 35, 42
C	# 15, 20, 25, 35, 42, 50, 60	# 15, 20, 25, 35, 42, 50, 60
D		# 15, 20, 25, 35, 42, 50, 60
Port	4MXM80M*	5MXM90M*
A	15, 20, 25, 35, 42	15, 20, 25, 35, 42
B	# 15, 20, 25, 35, 42, 50, 60	15, 20, 25, 35, 42
c	△ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▲ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▝ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▉ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▿ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▭ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▍ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▱ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▹ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▬ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▶ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▼ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▋ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▸ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▵ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▽ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ ▴ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ △ □□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□口□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□☐□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□□

: Use a reducer to connect pipes.
:Use No.2 and 4 reducers.
: Use No. 5 and 6 reducers.
□ : Use No. 1 and 3 reducers.

Refer to "How to Use Reducers" on page 10 for information on reducer numbers and their shapes.

Precautions on Installation

• Check the strength and level of the installation ground so that the unit will not cause any operating vibration or noise after installed.
• In accordance with the foundation drawing in fix the unit securely by means of the foundation bolts. (Prepare 4 sets of M8 or M10 foundation bolts, nuts and washers each which are available on the market.)
• It is best to screw in the foundation bolts until their ends are 20mm from the foundation surface.

Outdoor Unit Installation Guideline

• Where a wall or other obstacle is in the path of outdoor unit's inlet or outlet airflow, follow the installation guidelines below.
• For any of the below installation patterns, the wall height on the exhaust side should be 1200mm or less.

Wall facing one side
Side view

Walls facing two sides

Top view

Walls facing three sides
More than 50
Top view
unit: mm

Selecting a Location for Installation of the Indoor Units

• The maximum allowable length of refrigerant piping, and the maximum allowable height difference between the outdoor and indoor units, are listed below. (The shorter the refrigerant piping, the better the performance. Connect so that the piping is as short as possible. Shortest allowable length per room is 3m.)

Outdoor unit capacity class	3MXM40M*	3MXM52M* 3AMXM52M*	3MXM68M*	4MXM68M*	4MXM80M*	5MXM90M*
Piping to each indoor unit	25m max.	25m max.	25m max.	25m max.	25m max.	25m max.
Total length of piping between all units	50m max.	50m max.	50m max.	60m max.	70m max.	75m max.

If the outdoor unit is positioned higher than the indoor units.

If the outdoor unit is positioned otherwise. (If lower than one or more indoor units)

Refrigerant Piping Work

1. Installing outdoor unit

1) When installing the outdoor unit, refer to "Precautions for Selecting the Location" on page 3 and the "Outdoor Unit Installation Drawings" on page 4.
2) If drain work is necessary, follow the procedures below.

2. Drain work

• If the drain port is covered by a mounting base or floor surface, place additional foot bases of at least 1-1/4 inch (30mm) in height under the outdoor unit's feet.
• In cold areas, do not use a drain socket, drain caps (1,2) and a drain hose with the outdoor unit. (Otherwise, the drain water may freeze, impairing heating performance.)

1) Attach drain cap (1) and drain cap (2).
2) Attach ⑧ drain socket.

3. Refrigerant piping

CAUTION

• Use the flare nut fixed to the main unit. (To prevent cracking of the flare nut by aged deterioration.)
• To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R32.)
• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
• Do not reuse joints which have been used once already.
• Installation shall be done by an installer, the choice of materials and installation shall comply with the applicable legislation. In Europe the EN378 is the applicable standard that shall be used.
• Ensure that the field piping and connections are not subjected to stress.

Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches.

Flare nut tightening torque
ø 1/4 inch (6.4mm)	10-1/2 — 12-3/4ft • lbf (14.2-17.2N • m)
ø 3/8 inch (9.5mm)	24-1/8 — 29-1/2ft • lbf (32.7-39.9N • m)
ø 1/2 inch (12.7mm)	36-1/2 — 44-1/2ft • lbf (49.5-60.3N • m)
ø 5/8 inch (15.9mm)	45-5/8 — 55-5/8ft • lbf (61.8-75.4N • m)

Width across flats	11/16 inch (17mm)	3/4 inch (19mm)	7/8 inch (22mm)	11/16 inch (27mm)
Valve cap tightening torque	10-1/2 — 12-5/8ft • lbf (14.2-17.2N • m)	12-5/8 — 15-3/8ft • lbf (17.1-20.9N • m)	16 — 20-1/4ft • lbf (21.6-27.4N • m)	35-3/8 — 44-1/8ft • lbf (48-59.8N • m)

Service port cap tightening torque

8-10-7/8ft Ibf (10.8-14.7N m)

Refrigerant Piping Work

4. Evacuating the air with a vacuum pump and checking for gas leakage

WARNING

• Do not mix any substance other than the specified refrigerant (R32) into the refrigeration cycle.
• When refrigerant gas leaks should occur, ventilate the room as soon and as much as possible.
  R32, as well as other refrigerants, should always be recovered and never be released directly into the environment.
• Use a vacuum pump for R32 or R410A exclusively. Using the same vacuum pump for different refrigerants may damage the vacuum pump or the unit.
• Use tools for R32 or R410A (such as the gauge manifold, charging hose, or vacuum pump adapter).
• During tests never pressurize the appliances with a pressure higher than the maximum allowable pressure (as indicated on the nameplate of the unit).
  If refrigerant gas leaks, ventilate the area immediately. Toxic gas may be produced if refrigerant gas comes into contact with fire.

• Never directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite.

• When piping work is completed, it is necessary to purge the air and check for gas leakage.
  If using additional refrigerant, perform air purging from the refrigerant pipes and indoor unit using a vacuum pump, then charge additional refrigerant.

• Use a hexagonal wrench (4mm) to operate the stop valve rod.
• All refrigerant pipe joints should be tightened with a torque wrench to the specified tightening torque.

1) Connect projection side of charging hose (which comes from gauge manifold) to gas stop valve's service port.
2) Fully open gauge manifold's low-pressure valve (Lo) and completely close its high-pressure valve (Hi). (High-pressure valve subsequently requires no operation.)
3) Perform vacuum pumping and make sure that the compound pressure gauge reads -0.1MPa (-76cmHg) . Evacuation for at least 1 hour is recommended.
4) Close gauge manifold's low-pressure valve (Lo) and stop vacuum pump. (Keep this state for 4-5 minutes to make sure that the compound pressure gauge pointer does not swing back. If it does go back, this may indicate the presence of moisture or leaking from connecting parts. After inspecting all the connection and loosening then retightening the nuts, repeat steps 2-4.)
5) Remove covers from liquid stop valve and gas stop valve.
6) Turn the liquid stop valve's rod 90 degrees counterclockwise with a hexagonal wrench to open valve. Close it after 5 seconds, and check for gas leakage. Using soapy water, check for gas leakage from indoor unit's flare and outdoor unit's flare and valve rods. After the check is complete, wipe all soapy water off.
7) Disconnect charging hose from gas stop valve's service port, then fully open liquid and gas stop valves. (Do not attempt to turn valve rod beyond its stop.)
8) Tighten valve caps and service port caps for the liquid and gas stop valves with a torque wrench at the specified torques. See "3. Refrigerant piping" on page 7 for details.

Refrigerant Piping Work

5. Charging with refrigerant

1) If the total length of piping for all rooms exceeds the figure listed below, additionally charge with 20g of refrigerant (R32) for each additional meter of piping.

Outdoor capacity class	3MXM40M, 3MXM52M, 3AMXM52M, 3MXM68M, 4MXM68M, 4MXM80M, 5MXM90M
Total length of piping for all rooms	30m

Important information regarding the refrigerant used

This product contains fluorinated greenhouse gases covered by the Kyoto Protocol. Do not vent gases into the atmosphere.

Refrigerant type: R32

GWP(1) value: 675 (1) GWP = global warming potential

Please fill in with indelible ink,

① the factory refrigerant charge of the product,
② the additional refrigerant amount charged in the field and
1 + 2 the total refrigerant charge

on the refrigerant charge label supplied with the product.

The filled out label must be adhered in the proximity of the product charging port (e.g. onto the inside of the stop valve cover).

1 factory refrigerant charge of the product: see unit name plate
2 additional refrigerant amount charged in the field (Refer to the above information for the quantity of refrigerant replenishment.)
3 total refrigerant charge
4 Contains fluorinated greenhouse gases covered by the Kyoto Protocol
5 outdoor unit
6 refrigerant cylinder and manifold for charging

NOTE:

National implementation of EU regulation on certain fluorinated greenhouse gases may require to provide the appropriate official national language on the unit. Therefore an additional multilingual fluorinated greenhouse gases label is supplied with the unit. Sticking instructions are illustrated on the backside of that label.

CAUTION

Even though the stop valve is fully closed, the refrigerant may slowly leak out; do not leave the flare nut removed for a long period of time.

Refrigerant Piping Work

6. Refrigerant piping work

Cautions on pipe handling

1) Protect the open end of the pipe against dust and moisture.
2) All pipe bends should be as gentle as possible. Use a pipe bender for bending.

Selection of copper and heat insulation materials

When using commercial copper pipes and fittings, observe the following:

1) Insulation material: Polyethylene foam

Heat transfer rate: 0.041 to 0.052W / mK (0.035 to 0.045kcal / mh^)

Refrigerant gas pipe's surface temperature reaches 110^ max.

Choose heat insulation materials that will withstand this temperature.

2) Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.

Gas pipe	O.D.: 9.5mm, 12.7mm / Thickness: 0.8mm (C1220T-O) O.D.: 15.9mm / Thickness: 1.0mm (C1220T-O)
Liquid pipe	O.D.: 6.4mm / Thickness: 0.8mm (C1220T-O)
Gas pipe insulation	I.D.: 12-15mm, I.D.: 16-20mm / Thickness: 13mm min.
Liquid pipe insulation	I.D.: 8-10mm / Thickness: 10mm min.
Minimum bend radius	O.D.: 6.4mm, 9.5mm / 30mm or more O.D.: 12.7mm / 40mm or more O.D.: 15.9mm / 50mm or more

3) Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
4) Piping and other pressure containing parts shall comply with the applicable legislation and shall be suitable for refrigerant. Use phosphoric acid deoxidised seamless copper for refrigerant.

7. Flaring the pipe end

1) Cut the pipe end with a pipe cutter.
2) Remove burrs with the cut surface facing downward so that the chips do not enter the pipe.
3) Put the flare nut on the pipe.
4) Flare the pipe.
5) Check that the flaring is properly made.

WARNING

• Do not use mineral oil on flared part.
• Prevent mineral oil from getting into the system as this would reduce the lifetime of the units.
• Never use piping which has been used for previous installations. Only use parts which are delivered with the unit.
• Never install a dryer to this R32 unit in order to guarantee its lifetime.
• The drying material may dissolve and damage the system.
  Incomplete flaring may cause refrigerant gas leakage.

How to Use Reducers

No.1 No.2

15.9 12.7

12.7 →9.5

No.3 No.4

15.9 12.7

12.7 9.5

No.5 No.6

15.9 15.9

9.5 9.5

Gasket (1)

Gasket (2)

Reduce and gasket

Use the reducers supplied with the unit as described below.

1) Connecting a pipe of 12.7 to a gas pipe connection port for 15.9 :

2) Connecting a pipe of 9.5 to a gas pipe connection port for 15.9 :

3) Connecting a pipe of 9.5 to a gas pipe connection port for 12.7 :

• When using the reducer packing shown above, be careful not to over-tighten the nut, or the smaller pipe may be damaged. (about 2/3 - 1 the normal torque)
• Apply a coat of refrigeration oil to the threaded connection port of the outdoor unit where the flare nut comes in.
• Use an appropriate wrench to avoid damaging the connection thread by overtightening the flare nut.

Flare nut tightening torque
Flare nut for φ9.5	32.7–39.9N·m (333–407kgf·cm)
Flare nut for φ12.7	49.5–60.3N·m (505–615kgf·cm)
Flare nut for φ15.9	61.8–75.4N·m (630–769kgf·cm)

Pump Down Operation

In order to protect the environment, be sure to pump down when relocating or disposing of the unit.

1) Remove the valve cap from liquid stop valve and gas stop valve.
2) Carry out forced cooling operation.
3) After 5 to 10 minutes, close the liquid stop valve with a hexagonal wrench.
4) After 2 to 3 minutes, close the gas stop valve and stop forced cooling operation.

1. Forced operation

1) Switch off the power.
2) Remove the Service lid (2 screws).
3) Remove the service PC-board switch cover (1 screw).
4) Switch SW5 and SW6 to off.
5) Turn the operation mode switch (SW2) to COOL.
6) Screw the service PC-board switch cover back on (1 screw)-
7) Switch the power on.
8) Push the forced operation switch (SW1) above the service PC-board cover.

Start forced colling operation.

To stop forced operation, push the forced operation switch (SW1) again.

WARNING

Do not remove the switch cover unless the power has been turned off. (Risk of electric shock)

WARNING

• Do not use tapped wires, stranded wires, extension cords, or starburst connections, as they may cause overheating, electrical shock, or fire.
• Do not use locally purchased electrical parts inside the product. (Do not branch the power for the drain pump, etc., from the terminal block.) Doing so may cause electric shock or fire.
• Be sure to install an earth leakage breaker. (One that can handle higher harmonics.)

(This unit uses an inverter, which means that an earth leakage breaker capable of handling harmonics must be used, in order to prevent malfunctioning of the earth leakage breaker itself.)

• Use an all-pole disconnection type breaker with at least 3mm between the contact point gaps.
• Do not connect the power wire to the indoor unit. Doing so may cause electric shock or fire.

1) Strip the insulation from the wire (3/4inch (20mm)).
2) Connect the connection wires between the indoor and outdoor units so that the terminal numbers match. Tighten the terminal screws securely. We recommend a flathead screwdriver be used to tighten the screws.
3) Be sure to match the symbols for wiring and piping.
4) Pull the wire lightly to make sure that it does not disconnect.
5) Pass the wiring through the cutout on the bottom of the protection plate and attach the protection plate.
6) After completing the work, reattach the service lid to its original position.

CAUTION

• Precautions to be taken for power supply wiring. When using stranded wires, make sure to use the round crimp-style terminal for connection to the power supply terminal

Arrow view A

• When connecting the inter-unit wires to the terminal block using a single core wire, be sure to curl the end of the lead. Improper work may cause heat and fires.

Stripping wire at terminal block

• Make sure that the earth wire between the pull relief and terminal is longer than the other wires.

Ground

This air conditioner must be grounded. For grounding, follow all local, and state electrical codes.

Standby Electricity Saving

3MXM40M, 3MXM52M, 3AMX52M only

The standby electricity saving function turns off power supply to the outdoor unit and sets the indoor unit into standby electricity saving mode, thus reducing the power consumption of the air conditioner.

The standby electricity saving function works on the following indoor unit.

For FTXM,FTXP,FTXJ type

CAUTION

• The standby electricity saving function cannot be used for models other than the specified ones.

• Procedure for turning on standby electricity saving function

1) Check that the main power supply is turned off. Turn it off if it has not been turned off.
2) Remove the stop valve cover.
3) Disconnect the selective connector for standby electricity saving.
4) Turn on the main power supply.

Standby electricity saving function off.

Standby electricity saving function on.

The standby electricity saving function is turned off before shipping.

CAUTION

• Before connecting or disconnecting the selective connector for standby electricity saving, make sure that the main power supply is turned off.
• The selective connector for standby electricity saving is required if an indoor unit other than the above applicable one is connected.

Priority Room Setting

• To use priority room setting, initial settings must be made when the unit is installed. Explain the priority room setting, as described below, to the customer, and confirm whether or not the customer wants to use priority room setting. Setting it in the guest and living rooms is convenient.

1. About the priority room setting function

The indoor unit for which priority room setting is applied takes priority in the following cases.

1-1. Operation mode priority

The operation mode of the indoor unit which is set for priority room setting takes priority. If the set indoor unit is operating, all other indoor units do not operate and enter standby mode, according to the operation mode of the set indoor unit.

1-2. Priority during high-power operation

If the indoor unit which is set for priority room setting is operating at high power, the capabilities of other indoor units will be somewhat reduced. Power supply gives priority to the indoor unit which is set for priority room setting.

1-3. Quiet operation priority

Setting the indoor unit to quiet operation will make the outdoor unit run quietly.

Setting procedure

Slide the switch to the ON side for the switch that corresponds to the piping connected to the indoor unit to be set. (In the figure below, it is room A.) Once the settings are complete, reset the power.

Be sure to only set one room

Night Quiet Mode Setting

• If Night Quiet Mode is to be used, initial settings must be made when the unit is installed. Explain Night Quiet Mode, as described below, to the customer, and confirm whether or not the customer wants to use Night Quiet Mode.

About Night Quiet Mode

The Night Quiet Mode function reduces operating noise of the outdoor unit at nighttime. This function is useful if the customer is worried about the effects of the operating noise on the neighbors.

However, if Night Quiet Mode is running, cooling capacity will be saved.

Setting procedure

Turn the Night Quiet Mode switch (SW6-1) to on.

HEAT Mode Lock

• Use the HEAT Mode Lock switch (SW5-1) in the "ON" position.

COOL Mode Lock

• Use the S15 connector to set the unit to cool only.

Setting to only cool (C) : short-circuit pins 3 and 5 of the connector

The following specifications apply to the connector housing and pins.

ST products Housing: VHR-5N

Pin: SVH-21T-1,1

Note that forced operation is also possible in COOL mode.

Trial Operation and Testing

• Before starting the test run, measure the voltage at the primary side of the safety breaker.
• Check that all liquid and gas stop valves are fully open.
• Check that piping and wiring all match. The wiring error check can be conveniently used for underground wiring and other wiring that cannot be directly checked.

1. Wiring error check

• This product is capable of automatic correction of wiring error.
• Press the "wiring error check switch" on the outdoor unit service PCboard. However, the wiring error check switch will not function for 3 minutes after the safety breaker is turned on, or depending on the outside air conditions (See Note 2.). About 15–20 minutes after the switch is pressed, the errors in the connection wiring will be corrected.

The service monitor LEDs indicate whether or not correction is possible, as shown in the table below. For details about how to read the LED display, refer to the service manual.

If self-correction is not possible, check the indoor unit wiring and piping in the usual manner.

LED	1	2	3	4	5	Message
Status	All Flashing					Automatic correction impossible
	Flashing One after another					Automatic correction completed
	(One or more of LEDs 1 to 4 are ON)					Abnormal stop [NOTE. 4]

Wiring correct example

NOTE:

1) For two rooms, LED 3, 4 and 5 are not displayed, and for three rooms, LED 4 and 5 is not displayed, and for four rooms, LED 5 is not displayed.
2) If the outside air temperature is 5^ or less, the wiring error check function will not operate.
3) After wiring error check operation is completed, LED indication will continue until ordinary operation starts. This is normal.
4) Follow the product diagnosis procedures. (Details of product error diagnosis are listed on the back of the right side plate.)

Trial Operation and Testing

2. Trial operation and testing

1) To test cooling, set for the lowest temperature. To test heating, set for the highest temperature. (Depending on the room temperature, only heating or cooling (but not both) may be possible.)
2) After the unit is stopped, it will not start again (heating or cooling) for approximately 3 minutes.
3) When trial operation is conducted in the HEAT operation directly after the circuit breaker is turned on, in some cases no air will be output for about 15 minutes in order to protect the air conditioner.
4) During the test run, first check the operation of each unit individually. Then also check the simultaneous operation of all indoor units.

Check both heating and cooling operation.

5) After running the unit for approximately 20 minutes, measure the temperatures at the indoor unit inlet and outlet. If the measurements are above the values shown in the table below, then they are normal.

	Cooling	Heating
Temperature difference between inlet and outlet	Approx. 8°C	Approx. 20°C

(When running in one room)

6) During cooling operation, frost may form on the gas stop valve or other parts. This is normal.
7) Operate the indoor units in accordance with the included operation manual. Check that they operate normally.

3. Items to check

Check item	Consequences of trouble	Check
Are the indoor units installed securely?	Falling, vibration, noise
Has an inspection been made to check for gas leakage?	Incomplete cooling/heating function
Has complete thermal insulation been done (gas pipes, liquid pipes, indoor portions of the drain hose extension)?	Water leakage
Is the drainage secure?	Water leakage
Are the ground wire connections secure?	Electrical leakage
Are the electric wires connected correctly?	Incomplete cooling/heating function
Is the wiring in accordance with the specifications?	No operation or burn damage
Are the inlets/outlets of the indoor and outdoor units free of any obstructions?	Incomplete cooling/heating function
Are the stop valves open?	Incomplete cooling/heating function
Do the marks match (room A, room B, room C, room D, room E) on the wiring and piping for each indoor unit?	Incomplete cooling/heating function
Is the priority room setting set for 2 or more rooms?	The priority room setting will not func-tion.

ATTENTION

• Have the customer actually operate the unit while looking at the manual included with the indoor unit. Instruct the customer how to operate the unit correctly (particularly cleaning of the air filters, operation procedures, and temperature adjustment).
• Even when the air conditioner is not operating, it consumes some electric power. If the customer is not going to use the unit soon after it is installed, turn off the breaker to avoid wasting electricity.
• If additional refrigerant has been charged because of long piping, list the amount added on the nameplate on the reverse side of the stop valve cover.

Piping Diagram

Outdoor Unit

Outdoor Unit

PED categories of equipment - High pressure switches : category IV; Compressor : category II; Accumulator: category: I; Other art 3§3 equipment.

NOTE:

When the high pressure switch is activated it must be reset manually by a qualified person.

Piping Diagram

Outdoor Unit

Outdoor Unit

PED categories of equipment - High pressure switches : category IV; Compressor : category II; Accumulator: category: I; Other art 3§3 equipment.

NOTE:

When the high pressure switch is activated it must be reset manually by a qualified person.

Piping Diagram

Outdoor Unit

PED categories of equipment - High pressure switches : category IV; Compressor : category II; Accumulator: category: I; Other art 3§3 equipment.

NOTE:

When the high pressure switch is activated it must be reset manually by a qualified person.