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Hokkaido HTFU 351 ZAL Service Manual

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Service Manual
►Cassette Compact 60 x 60 Indoor Units
HTFU 351 ZAL
►Cassette Slim 84 x 84 Indoor Units
HTBI 711 ZA
HTBI 1081 ZA
►Ducted Medium Static Pressure Indoor Units
HUCU 351 ZAL HUCU 531 ZAL HUCI 711 ZA
HUCI 1081 ZA HUCI 1401 ZA HUCI 1601 ZA
►Floor Ceiling Indoor Units
HSFU 531 ZAL HSFI 711 ZA1
HSFI 1081 ZA1 HSFI 1401 ZA1 HSFI 1601 ZA1
►Outdoor Units:
HCKI 351 ZA-1 HCKI 531 ZA-1 HCKI 711 ZA-1
HCSI 1081 ZA-1 HCSI 1401 ZA-1 HCSI 1601 ZA-1
HTFU 531 ZAL
HTBI 1401 ZA
HTBI 1601 ZA
[ Release 1.0 ]

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  • Page 1 Service Manual [ Release 1.0 ] ►Cassette Compact 60 x 60 Indoor Units HTFU 351 ZAL HTFU 531 ZAL ►Cassette Slim 84 x 84 Indoor Units HTBI 711 ZA HTBI 1081 ZA HTBI 1401 ZA HTBI 1601 ZA ►Ducted Medium Static Pressure Indoor Units...

  • Page 2: Table Of Contents

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Table of Contents n Models Lineup & Data Tables ......................3 1. Safety Precautions ..........................14 2. Model Reference ..........................20 3. Compact Cassette Indoor Units....................24 4. Slim Cassette Indoor Units ......................30 5.

  • Page 3: Models Lineup & Data Tables

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 n Models Lineup & Data Tables COMPACT CASSETTE 60x60 COMPACT TECHNOLOGY OPERATION -15~50 The cassette type air conditioning units are designed for commercial premises.
  • Page 4 -15~24 in heating optional 750 mm from the lower height Indoor unit model HTFU 351 ZAL HTFU 531 ZAL Outdoor unit model HCKI 351 ZA-1 HCKI 531 ZA-1 Type DC-Inverter heat pump Control (included)
  • Page 5 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 SLIM CASSETTE 84x84 SOPHISTICATED DESIGN OPERATION -15~50 The 8-ways cassette type unis for suspended ceilings combine exceptional features with a sophisticated design. in cooling This range is extremely flexible and uses low GWP R32 -15~24 refrigerant.
  • Page 6 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 RESIDENTIAL AND COMMERCIAL R32 SLIM CASSETTE 84x84 HTBI 711-1081-1401-1601 ZA -15~50 Pre-set for external air inlet in cooling Condensate drain pump included with possibility of raising the -15~24 in heating Remote control included as...
  • Page 7 DUCTED WITH MEDIUM STATIC PRESSURE RELIABLE AND DISCRETE OPERATION -15~50 The Hokkaido Ducted systems combine first class features with a plain design for easy installation and maintenance. in cooling Our ducted air conditioning units are suitable for both residential and business use.
  • Page 8 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 RESIDENTIAL AND COMMERCIAL R32 DUCTED WITH MEDIUM STATIC PRESSURE -15~50 Wired remote in cooling Condensate drain pump included with possibility of raising the discharge up to 750 mm from the lower height control included -15~24 in heating...
  • Page 9 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 RESIDENTIAL AND COMMERCIAL R32 DUCTED WITH MEDIUM STATIC PRESSURE -15~50 in cooling Condensate drain pump included with possibility of raising the Wired remote discharge up to 750 mm from the lower height control included -15~24 in heating...
  • Page 10 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 FLOOR/CEILING TWO WAYS OF INSTALLATION OPERATION -15~50 New design stylish. in cooling The wide air distribution louver with aerodynamic flaps ensure fast and silent operation. -15~24 in heating PERFORMANCE MODEL...
  • Page 11 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 RESIDENTIAL AND COMMERCIAL R32 FLOOR/CEILING HSFU 531 ZAL - HSFI 711-1081-1401-1601 ZA1 -15~50° in cooling Turbo function, to heat and cool the Remote control Excellent installation environment quickly flexibility included as standard...
  • Page 12 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 RESIDENTIAL AND COMMERCIAL R32 TWIN COMBINATIONS Indoor unit model 2 x HTBI 711 ZA Outdoor unit model HCSI 1401 ZA-1 Type DC-Inverter heat pump with 2 slim cassette indoor units Control (included) Remote control Cooling...
  • Page 13 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 RESIDENTIAL AND COMMERCIAL R32 TWIN COMBINATIONS Indoor unit model 2 x HSFU 531 ZAL 2 x HSFI 711 ZA1 Outdoor unit model HCSI 1081 ZA-1 HCSI 1401 ZA-1 Type DC-Inverter heat pump with 2 ceiling/ oor indoor units Control (included)

  • Page 14: Safety Precautions

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Safety Precau�ons Contents Precau�ons Informa�on servicing (for flammable materials)
  • Page 15 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Precau�ons To prevent personal injury, or property or unit damage, CAUTION adhere to all precau�onary measures and instruc�ons outlined in this manual. Before servicing a unit, refer to this •...
  • Page 16 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Informa�on servicing (for flammable materials) 2.1 Checks to the area •Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable hazards or •Prior to beginning work on systems containing flammable re igni�on risks.
  • Page 17 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 checks shall include: excessive pressure, vibra�on, sharp edges or any other adverse •that capacitors are discharged: this shall be done in a safe environmental effects. The checks hall also take into account manner to avoid possibility of sparking;...

  • Page 18: Charging Procedures

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 •open the circuit by cu�ng or brazing. task is commenced. •The refrigerant charge shall be recovered into the correct •Become familiar with the equipment and its opera�on. recovery cylinders.
  • Page 19 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 total system charge are available. All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the recovery of refrigerant).

  • Page 20: Model Reference

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Model Reference Contents Model Reference External Appearance...
  • Page 21 Refer to the following table to determine the specific indoor and outdoor unit model number of your purchased equipment. 1.1 Cassette Type (Comapct and Slim) Indoor Units Power Supply Indoor Unit Model Outdoor Unit Model Capacity (Btu/h) HTFU 351 ZAL HCKI 351 ZA-1 HTFU 531 ZAL 1ɸ, 220~240V~, 50Hz HCKI 531 ZA-1 HCKI 711 ZA-1...

  • Page 22: External Appearance

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. External Appearance 2.1 Indoor Units Cassette Compact 60 x 60 Cassette Slim 84 x 84 HTFU (351, 531) ZAL HTBI (711, 1081, 1401, 1601) ZA Ducted Medium Static Pressure Floor Ceiling HUCU (351, 531) ZAL, HUCI (711, 1081, 1401, 1601) ZA...

  • Page 23: Outdoor Units

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2.2 Outdoor Units Single Fan Outdoor Units Double Fan Outdoor Units HCKI (351, 531) ZA-1 HCSI (1401, 1601) ZA-1 HCKI 711 ZA-1 HCSI 1081 ZA-1...

  • Page 24: Compact Cassette Indoor Units

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Compact Cassette Indoor Units Contents Features Dimensional Drawings Part Names Service Place...
  • Page 25 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Features 1.1 Compact design • The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for installation and will not damage the decoration.

  • Page 26: Wired Controller (Optional)

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.5 Fresh Air • Fresh air intake function brings you fresh and comfortable air feeling. 1.6 Wired Controller (Optional) • Compared with infrared remote controller, wired controller can be fixed on the wall and avoid mislaying. It's mainly used for commercial zone and makes air conditioner control more convenient.

  • Page 27: Dimensional Drawings

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Dimensional Drawings Unit: mm Liquid side Gas side Body Drain hole Wiring connection port (for Service) E-parts box 2-Ø150 Distribution duct 2-Ø170 4-Screw hole (for panel install) 4-install hanger Ø32 Drain pipe Ø65 Fresh air intake...

  • Page 28: Part Names

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Part Names Drain pump (within indoor unit) Drain pipe Air outlet Air inlet Front grille Louver Display panel Refrigerant pipe...

  • Page 29: Service Place

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 4. Service Place...

  • Page 30: Slim Cassette Indoor Units

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 4. Slim Cassette Indoor Units Contents Features Dimensional Drawings Part Names Service Place...

  • Page 31: Easy Installation

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Features 1.1 360° Air Flow • 360°directional wind can deliver air evenly throughout every corner in any space, reducing hot and cold spots in the room.
  • Page 32 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.5 Fresh Air • Fresh air intake function brings you fresh and comfortable air feeling. 1.6 Wired Controller (optional) • Compared with infrared remote controller, wired controller can be fixed on the wall and avoid mislaying. It's mainly used for commercial zone and makes air conditioner control more convenient.
  • Page 33 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Dimensional Drawings Unit: mm Unit: mm Models HTBI 711 ZA HTBI 1081 ZA HTBI 1401 ZA HTBI 1601 ZA...
  • Page 34 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Part Names Display panel Louver Air outlet Air inlet 4. Service Place Ceiling Ventilator Indoor unit Indoor unit Illumination Ceiling >150cm >150cm (>200cm >200cm recommended) >400cm >>230cm Ground...

  • Page 35: Ducted Medium Indoor Units

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 5. Ducted Medium Indoor Units Contents Features Dimensional Drawings Part Names Service Place...
  • Page 36 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Features 1.1 Eccentric Fan Design New eccentric fan design improves the airflow at the air outlet, resulting in better performance. 1.2 Slim Design The industry lowest height is designed to be fitted into tight roof space. 1.3 Flexible Air Intake The frame size of air inlet in rear and bottom is the same.
  • Page 37 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.4 Built-in drain pump The built-in drain pump can lift condensing water up to 750mm. 1.5 Easy Clean You can pull out the filter from left, right, or from the bottom for easy cleaning.
  • Page 38 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Dimensional Drawings Model unit (KBtu/h) inch 27.6 19.9 17.7 21.1 23.6 29.2 14.2 inch 34.65 8.27 26.54 23.62 5.51 27.8 1.97 5.35 30.79 7.48 1.57 36.22 3.07 5.83...
  • Page 39 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Part Names Air inlet Electric control box Air filter (on some models) Drain hose Air outlet Refrigerant connecting pipe 4. Service Place Air outlet 30cm 20cm (60cm x 60cm) Air inlet...

  • Page 40: Floor Ceiling Indoor Units

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 6. Floor Ceiling Indoor Units Contents Features Dimensional Drawings Part Names Service Place...
  • Page 41 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Features 1.1 Easy installation-2 Style installation • Fashionable design and streamline appearance, suitable for different room style. 1.2 3D Airflow • Vertical air flow and horizontal airflow can be adjusted by remote controller to direct air flow to every corner of the room.
  • Page 42 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Dimensional Drawings Models Unit 1068 531, 711 inch 42.05 26.57 9.25 38.7 1650 1565 1081, 1401, 1601 inch 64.96 26.57 9.25 61.61...
  • Page 43 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Part Names Installation part Louver Grille Air inlet Air outlet Display panel...
  • Page 44 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 4. Service Place 35mm...

  • Page 45: Outdoor Units

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7. Outdoor Units Contents Dimensional Drawings Service Place Refrigerant Cycles Diagrams Printed Circuit Boards Layout...
  • Page 46 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Dimensional Drawings Model HCKI 351 ZA-1...
  • Page 47 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCKI 531 ZA-1...
  • Page 48 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCKI 711 ZA-1...
  • Page 49 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCSI 1081 ZA-1...
  • Page 50 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Models HCSI (1401, 1601) ZA-1...
  • Page 51 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. . Service Place...

  • Page 52: Refrigerant Cycle Diagrams

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Refrigerant Cycle Diagrams Pipe Size Piping length (m) Elevation (m) (Diameter:ømm) Additional Refrigerant Model Charge (beyond 5m) Liquid Rated Max. Rated Max. HCKI 351 ZA-1 9.52(3/8)"...
  • Page 53 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Pipe Size Piping length (m) Elevation (m) (Diameter:ømm) Additional Refrigerant Model Charge (beyond 5m) Liquid Rated Max. Rated Max. HCKI 711 ZA-1 9.52(3/8)" 15.9(3/8") 24g/m...
  • Page 54 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Pipe Size Piping length (m) Elevation (m) (Diameter:ømm) Additional Refrigerant Model Charge (beyond 5m) Liquid Rated Max. Rated Max. HCSI 1081 ZA-1 15.9(5/8") 9.52(3/8") HCSI 1041 ZA-1 15.9(5/8") 9.52(3/8") 24g/m 15.9(5/8") 9.52(3/8")
  • Page 55 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 4. Printed Circuit Boards Layout Models HCKI (351, 531) ZA-1: Outdoor Unit PCB Diagram...
  • Page 56 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Name Meaning Earth: connect to Ground N_in: connect to N-line (208-230V AC input) CN1A L_in: connect to L-line (208-230V AC input) CN16 S: connect to indoor unit communication HEAT1 CN17 Connect to compressor heater, 208-230V AC when is ON...
  • Page 57 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCKI 711 ZA-1: Outdoor Unit PCB Diagram RC 2 VU B...
  • Page 58 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Name Meaning Earth: connect to Ground Power Supply N_in: connect to N-line (208-230V AC input) L_in: connect to L-line (208-230V AC input) S: connect to indoor unit communication 4-WAY CN60 Connect to 4 way valve, 208-230V AC when is ON...
  • Page 59 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Models HCSI (1081, 1401, 1601) ZA-1: Outdoor Unit PCB Diagram...
  • Page 60 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Name Meaning CN301 CN301 Connect to DC fan motor CN23 CN23 Connect to Comp Top CN705 CN705 Connect to AC fan motor CN706 CN706 Connect to AC fan motor CN709 CN709 Connect to AC fan motor...
  • Page 61 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Models HCSI (1081, 1401, 1601) ZA-1: Outdoor Unit DC Motor Driver Board Diagram...
  • Page 62 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Name Meaning CON1 POWER Power supply 208-230V AC Connect to main board TESTPORT Used for testing CN505 CN505 Connect to PC communication FAN1 FAN1 Connect to DC fan1 FAN2 FAN2 Connect to DC fan2...

  • Page 63: Maintenance

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 8. Maintenance Contents First Time Installation Check Refrigerant Recharge Re-Installation 3.1 Indoor Unit 3.2 Outdoor Unit...

  • Page 64: First Time Installation Check

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. First Time Installation Check Air and moisture trapped in the refrigerant system affects To prevent air and moisture from affecting the air the performance of the air conditioner by: conditioner’s performance, the indoor unit, as well as the pipes between the indoor and outdoor unit, must be be leak •...
  • Page 65 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure: • If the pressure successfully reaches -0.1 MPa Tighten the flare nuts of the indoor and outdoor (14.5 Psi), fully close the Handle Lo valve, then units, and confirm that both the 2- and 3-way cease vacuum pump operations.

  • Page 66: Refrigerant Recharge

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Refrigerant Recharge cylinder Procedure: Close both 2- and 3-way valves. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant. Slightly connect the Handle Lo charge hose to the 3-way service port.

  • Page 67: Indoor Unit

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Re-Installation 3.1 Indoor Unit Collecting the refrigerant into the outdoor unit Procedure: Confirm that the 2- and 3-way valves are opened. Close the 3-way valve so that the gauge rests between 0.3 MPa (43.5 Psi) and 0.5 MPa (72.5 Psi).
  • Page 68 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Air purging with vacuum pump: Pressure gauge pump adapter pump Procedure: Tighten the flare nuts of the indoor and outdoor • If the pressure successfully reaches -0.1 MPa units, and confirm that both the 2- and 3-way (14.5 Psi), fully close the Handle Lo valve, then valves are closed.

  • Page 69: Outdoor Unit

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3.2 Outdoor Unit Evacuation for the whole system Procedure: Wait for 5 minutes then check whether the gauge Confirm that the 2- and 3-way valves are opened. needle moves after turning off the vacuum pump.
  • Page 70 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Refrigerant charging cylinder Procedure: Close both 2- and 3-way valves. Operate the air conditioner in cooling mode to charge the system with liquid refrigerant. Slightly connect the Handle Lo charge hose to the 3-way When the electronic scale displays the correct weight service port.

  • Page 71: Troubleshooting

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 9. Troubleshooting Contents Safety Caution General Troubleshooting Information Inquiry Outdoor Unit Point Check Function Error Diagnosis and Troubleshooting Without Error Code 5.1 Remote maintenance 5.2 Field maintenance Quick Maintenance by Error Code Troubleshooting by Error Code Check Procedures...

  • Page 72: Safety Caution

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Safety Caution WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. While checking indoor/outdoor PCB, please equip oneself with antistatic gloves or wrist strap to avoid damage to the board.

  • Page 73: General Troubleshooting

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. General Troubleshooting 2.1 Error Display (Indoor Unit) When the indoor unit encounters a recognized error, the operation lamp will flash in a corresponding series, the timer lamp may turn on or begin flashing, and an error code will be displayed.

  • Page 74: Troubleshooting

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Troubleshooting: Test the unit using the remote control. If the unit does not respond to the remote, the indoor PCB requires replacement. If the unit responds, the display board requires replacement. LED flash frequency: ...

  • Page 75: Information Inquiry

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3. Information Inquiry 3.1 Duct Type (HUCU, HUCI) & Floor Ceiling Type (HSFU, HSFI) • To enter information inquiry status, complete the following procedure within 10 seconds: •...
  • Page 76 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Displayed value Displayed code Explanation Meaning Additional Notes Room temperature -25, -24, -23, -22, -1F, -1E, -1d, -1c, -1b, -1A -21, -20 Indoor coil temperature All displayed temperatures use ac- tual values.
  • Page 77 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Displayed code Explanation Displayed value Meaning Additional Notes 0-FF Reserved 0-63 0-FF...
  • Page 78 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3.2 Compact Cassette Type (HTFU) • To enter information inquiry status, complete the following procedure within 10 seconds: • Press LED (or DO NOT DISTURB) 3 times. •...
  • Page 79 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 3.3 Slim Cassette Type (HTBI) • To enter engineer mode, in power-on or standby mode, and in non-locked state, press the key combination “ON/OFF + Air Speed” for 7s: •...
  • Page 80 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Exit of engineer mode: 1) In engineer mode, press the key combination of “On/Off + Air speed” for 2s; 2) The engineer mode will be exited if there are no valid key operations for continuous 60s.
  • Page 81 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Error codes of engineer mode: Display Error Information EH 00/EH 0A Indoor unit EEPROM parameter error Indoor/outdoor unit communication error EL 01 Communication error between indoor unit and indoor external fan module EH A Parameters error of indoor external fan EH 30...
  • Page 82 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Top temperature protection of compressor or High temperature protection of IPM module pc 02 Communication error between outdoor main chip and compressor driven chip PC 40 Current Input detection protection Pc 41 Compressor start error...
  • Page 83 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 4. Outdoor Unit Point Check Function (for some models) A check switch is included on the outdoor PCB. Push SW1 to check the unit’s status while running. The digital display shows the following codes each time the SW1 is pushed. Number Display Remark...
  • Page 84 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Frequency limit caused by IGBT Bit7 radiator Frequency limit caused by PFC Bit6 The display value is a he- Frequency limit caused by high xadecimal number. Bit5 temperature of T2 For example, the digital...

  • Page 85: Error Diagnosis And Troubleshooting Without Error Code

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 5. Error Diagnosis and Troubleshooting Without Error Code WARNING Be sure to turn off unit before any maintenance to prevent damage or injury. 5.1 Remote maintenance SUGGESTION: When troubles occur, please check the following points with customers before field maintenance.

  • Page 86: Field Maintenance

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 5.2 Field maintenance Problem Solution Unit will not start See beyond Compressor will not start but fans run See beyond Compressor and condenser (outdoor) fan will not start See beyond Evaporator (indoor) fan will not start See beyond...

  • Page 87: Remote Maintenance

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Remote Maintenance Electrical Circuit Refrigerant Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ The power switch is on but fans will not start ☆...
  • Page 88 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Remote Maintenance Others Possible causes of trouble Unit will not start The power switch is on but fans will not start ☆ The temperature on the display board cannot be set Unit is on but the wind is not cold(hot) Unit runs, but shortly stops The unit starts up and stops frequently...
  • Page 89 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Field Maintenance Refrigerant Circuit Others Possible causes of trouble Unit will not start Compressor will not start but fans run ☆ Compressor and condenser (outdoor) fan will not start Evaporator (indoor) fan will not start Condenser (Outdoor) fan will not start...
  • Page 90 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 2. Field Maintenance Electrical Circuit Possible causes of trouble Unit will not start ☆ ☆ ☆ ☆ ☆ ☆ Compressor will not start but fans run ☆...

  • Page 91: Quick Maintenance By Error Code

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 6. Quick Maintenance by Error Code If you do not have the time to test which specific parts are faulty, you can directly change the required parts according the error code.

  • Page 92: Troubleshooting By Error Code

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7. Troubleshooting by Error Code 7.1 EH 0 0/ EH 0A / EC 51 (EEPROM Parameter Error Diagnosis and Solution) Description: Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Recommended parts to prepare: •...
  • Page 93 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.2 EL 01 (Indoor and Outdoor Unit Communication Error Diagnosis and Solution) Description: Indoor unit can not communicate with outdoor unit Recommended parts to prepare: • Indoor PCB •...
  • Page 94 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Remarks: • Use a multimeter to test the DC voltage between 2 port (S or L2 port) and 3 port (N or S port) of outdoor unit. The red pin of multimeter connects with 2 port (S or L2 port) while the black pin is for 3 port (N or S port) .
  • Page 95 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.3 EH 03 / EC 07 (Fan Speed Is Operating Outside of Normal Range) / EC 71 (Over Current Failure of Outdoor DC Fan Motor) Diagnosis and Solution Description: When indoor / outdoor fan speed keeps too low or too high for a certain time, the unit ceases operation and the LED displays the failure.
  • Page 96 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Index: 1. Indoor or Outdoor DC Fan Motor (control chip is in fan motor) Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector. If the value of the voltage is not in the range showing in below table, the PCB must has problems and need to be replaced.
  • Page 97 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Port Description Parameter Remark CON1 Power input for the PCB 230V/AC Communication with main PCB Test port 5V/DC For debugging board CN23 UVW output for DC fan motor CON2 Ports for reactor CN1: Communication with main PCB...
  • Page 98 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 CON1 Drive Chip EEPROM FAN1 FAN2 IPM for DC Rectifier Part Description Parameter Remark CON1 Power input for the PCB 192-380V/DC Communication with main PCB Test port 5V/DC For debugging board FAN1...
  • Page 99 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.4 EH 60 /EH 61 /EC 53 / EC 52 / EC 54 / EC 5 6/ EC 50 (Open Circuit or Short Circuit of Temperature Sensor Diagnosis and Solution) Description: If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays the failure.
  • Page 100 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.5 EL 0C (Refrigerant Leakage Detection Diagnosis and Solution) Description: Judging the abnormality of the refrigeration system according to the number of compressor stops and the changes in operating parameters caused by excessive exhaust temperature.
  • Page 101 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.6 EH 0E (Water-Level Alarm Malfunction Diagnosis and Solution) Description: If the sampling voltage is not 5V, the LED displays the failure code. Recommended parts to prepare: •...
  • Page 102 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.7 PC 00 (IPM malfunction or IGBT over-strong current protection Diagnosis and Solution) Description: When the voltage signal the IPM sends to the compressor drive chip is abnormal, the display LED shows “PC 00” and the AC turn off.
  • Page 103 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.8 PC 01 (Over voltage or too low voltage protection) / PC 10 (Outdoor unit low AC voltage protection) / PC 11 (Outdoor unit main control board DC bus high voltage protection) / PC 12 (Outdoor unit main control board DC bus high voltage protection / 341 MCE error) Diagnosis and Solution Description: Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit.
  • Page 104 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.9 PC 04 (Inverter compressor drive error Diagnosis and Solution) Description: An abnormal inverter compressor drive is detected by a special detection circuit, including communication signal detection, voltage detection, compressor rotation speed signal detection and so on.
  • Page 105 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.10 PC 03 / PC 31 (Low Pressure Protection Diagnosis and Solution) Description: If the sampling voltage is not 5V, the LED displays a failure code. Recommended parts to prepare: •...
  • Page 106 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.11 PC 02 (Top temperature protection of compressor or High temperature protection of IPM module diagnosis and solution) Description: For some models with overload protection, If the sampling voltage is not 5V, the LED will display the failure. If the temperature of IPM module is higher than a certain value, the LED displays the failure code.
  • Page 107 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 (Follows from previous page) Check the fastening screws on the PCB and IPM radiator. Are they Replace the outdoor fixed tightly? control PCB. Tighten the screws and apply silicon grease.
  • Page 108 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.12 EC 0d (Outdoor unit malfunction Diagnosis and Solution) Description: The indoor unit detects the outdoor unit is in error. Recommended parts to prepare: • Outdoor unit Troubleshooting and repair: Power off, then restart the unit 2 mi-...
  • Page 109 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.13 PC 40 (Communication error between outdoor main PCB and IPM board diagnosis and solution) Description: The main PCB cannot detect the IPM board. Recommended parts to prepare: •...
  • Page 110 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.14 PC 08 (Current overload protection) / PC 44 (Outdoor unit zero speed protection) / PC46 (Com- pressor speed has been out of control) / PC 49 (Compressor overcurrent failure) diagnosis and solution Description: An abnormal current rise is detected by checking the specified current detection circuit.
  • Page 111 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 (Follows from previous page) Troubleshooting and repair: Was the protection activated in standby? Restart the unit when the power supply Is the power voltage normal? returns to normal. Is the power wiring wired Reconnect the power Is outdoor terminal voltage normal?
  • Page 112 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.15 PC 0F (PFC module protection diagnosis and solution) Description: When the voltage signal that IPM sends to compressor drive chip is abnormal, the LED displays the failure code and the AC turns off.
  • Page 113 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.16 EC 72 (Lack phase failure of outdoor DC fan motor diagnosis and solution) Description: When the three-phase sampling current of the DC motor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code.
  • Page 114 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.17 PC 43 (Outdoor compressor lack phase protection diagnosis and solution) Description: When the three-phase sampling current of the compressor is abnormal, especially when the current of one or more phases is always small and almost 0, the LED displays the failure code.
  • Page 115 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.18 PC 45 (Outdoor unit IR chip drive failure diagnosis and solution) Description: When the IR chip detects its own parameter error, the LED displays the failure code when power on. Recommended parts to prepare: •...
  • Page 116 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.19 PC 0L (Low ambient temperature protection) Description: It is a protection function. When compressor is off, if outdoor ambient temperature (T4) is lower than -35 C.
  • Page 117 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.20 EH 0b (Communication error between indoor two chips diagnosis and solution) Description: Indoor PCB main chip does not receive feedback from another chip. Recommended parts to prepare: •...
  • Page 118 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.21 PC 30 (High pressure protection diagnosis and solution) Description: Outdoor pressure switch cut off the system because high pressure is higher than 4.4 MPa. Recommended parts to prepare: •...
  • Page 119 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 (Follows from previous page) Troubleshooting and repair: High pressure protection. Are the high pressure switch Connect high pressure switch and main control board wired and main control board. correctly? Is the high pressure protector broken? Method: Disconnect the plug.
  • Page 120 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.22 PC 0A (High temperature protection of condenser diagnosis and solution) Description: When the outdoor pipe temperature is more than 65°C, the unit stops. It starts again only when the outdoor pipe temperature is less than 52°C.
  • Page 121 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 7.23 PC 06 (Discharge temperature protection of compressor diagnosis and solution) Description: If the compressor discharge temperature exceeds a certain level for nine seconds, the compressor ceases operation, the LED displays the failure code.

  • Page 122: Check Procedures

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 8. Check Procedures 8.1 Temperature Sensor Check WARNING Be sure to turn off all power supplies or disconnect all wires to avoid electric shock. Operate after compressor and coil have returned to normal temperature in case of injury.
  • Page 123 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Outdoor Unit Outdoor Unit Outdoor Unit Outdoor Unit HCKI 351 ZA-1 HCKI 531 ZA-1 HCKI 711 ZA-1 HCSI 1081 ZA-1 Resistance Values (Ohm) Compressor Model Compressor Model Compressor Model Compressor Model KSN98D64UFZ3...

  • Page 124: Ipm Continuity Check

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 8.3 IPM Continuity Check WARNING Electricity remains in capacitors even when the power supply is off. Ensure the capacitors are fully discharged before troubleshooting. 1. Turn off outdoor unit and disconnect power supply. 2.

  • Page 125: Indoor Units Disassembly - Compact Cassette

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 10. Indoor Unit Disassembly - Compact Cassette Contents Indoor Unit Disassembly Front Panel and Display Board Electrical Parts (Antistatic gloves must be worn.) Fan Motor and Fan Water Pump Evaporator...

  • Page 126: Front Panel And Display Board

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Indoor Unit Disassembly 1.1 Front Panel and Display Board Procedure Illustration 1) Release 2 hooks and open the panel. (see CJ_MCA_001) CJ_MCA_001 2) Remove two screws of wire line. see CJ_MCA_002) CJ_MCA_002 Note: This section is for reference only.
  • Page 127 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Release the hook then pull up the filter. (see CJ_MCA_003) CJ_MCA_003 4) Remove 4 screws of cover and remove the display board. (see CJ_MCA_004) CJ_MCA_004 Note: This section is for reference only.
  • Page 128 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 5) Remove 2 screws of display board and remove PCB.(see CJ_MCA_005) CJ_MCA_005 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 129 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.2 Electrical Parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1.1 Front Panel and display) before disassembling electrical parts. Procedure Illustration 1) Remove 4 screws of the panel and pull up the panel.
  • Page 130 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Disconnect the connectors of PCB. (see CJ_MCA_008) CJ_MCA_008 4) Remove 2 screws of main control board and remove PCB. (see CJ_ MCA_009) CJ_MCA_009 5) Remove 2 screws of electronic control box and remove electronic control box.

  • Page 131: Fan Motor And Fan

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.3 Fan motor and fan Note: Remove the front panel and electrical parts (refer to 1.1 & 1.2 ) before disassembling fan motor. Procedure Illustration 1) Remove 4 screws of water collector then remove it.
  • Page 132 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove the nuts and remove the fan motor. (see CJ_MCA_013) CJ_MCA_013 Note: This section is for reference only. Actual unit appearance may vary.

  • Page 133: Water Pump

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.4 Water Pump Note: Remove the front panel, electrical parts and water collector (refer to 1.1, 1.2 & 1.3) before disassembling water pump. Procedure Illustration 1) Take off the fasten belt of the water pump.
  • Page 134 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove 3 screws and then remove the water pump. (see CJ_MCA_016) CJ_MCA_016 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 135 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.5 Evaporator Note: Remove the front panel, electrical parts and fan (refer to 1.1, 1.2 & 1.3) before disassembling evaporator. Procedure Illustration 1) Remove 3 screws of pipe clamp board assembly then remove it.
  • Page 136 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove 1 screw of evaporator fixing hook and remove it. (see CJ_MCA_019) CJ_MCA_019 Note: This section is for reference only. Actual unit appearance may vary.

  • Page 137: Indoor Units Disassembly - Slim Cassette

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 11. Indoor Unit Disassembly - Slim Cassette Contents Indoor Unit Disassembly Front Panel Electrical Parts (Antistatic gloves must be worn.) Display Board Water Pump Water Collector & Water Level Switch Fan Motor and Fan Evaporator...

  • Page 138: Front Panel

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Indoor Unit Disassembly 1.1 Front Panel Procedure Illustration 1) Push one side of the grille clamp. (see CJ_MCD1_001) CJ_MCD1_001 2) Remove one screw then push two grille clamps to remove the air inlet grille as- sembly.
  • Page 139 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Turn over the air inlet grille assembly, then pull up the filter. (see CJ_ MCD1_003) CJ_MCD1_003 4) Remove 2 screws and remove the cover of electronic control box.
  • Page 140 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 5) Disconnect the connectors of display board and stepper motor and release the panel. (see CJ_MCD1_005) CJ_MCD1_005 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 141 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.2 Electrical Parts (Antistatic gloves must be worn.) Procedure Illustration 1) Remove 3 screws of electronic control box and 1 screw of earth wire. (see CJ_MCD1_006) 2) Disconnect the connectors of tempera- ture sensor, pump, motor and water level switch.

  • Page 142: Display Board

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.3 Display Board Procedure Illustration 1) Open the install cover assembly (with display board). (see CJ_MCD1_008) CJ_MCD1_008 2) Remove 1 screw of display window board. (see CJ_MCD1_009) CJ_MCD1_009 Note: This section is for reference only.
  • Page 143 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Turn over the display board, push the switch to remove the display board. (see CJ_MCD1_010) CJ_MCD1_010 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 144 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.4 Water Pump Procedure Illustration 1) Remove 5 screws fixing external water pump box assembly. (see CJ_ MCD1_011) CJ_MCD1_011 2) Remove the water pump box assembly. (see CJ_MCD1_012) CJ_MCD1_012 Note: This section is for reference only.
  • Page 145 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.5 Water Collector and Water Level Switch Procedure Illustration 1) Remove the 2 screws of the ventila- tion ring. (see CJ_MCD1_013) CJ_MCD1_013 2) Remove the 2 screws fixing the wa- ter collector.
  • Page 146 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove the 5 screws of the water col- lector subassembly. (see CJ_ MCD1_015) CJ_MCD1_015 4) Turn over the water collector subas- sembly and remove the water level switch. (see CJ_MCD1_016) CJ_MCD1_016 Note: This section is for reference only.

  • Page 147: Fan Motor And Fan

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.6 Fan Motor and Fan Procedure Illustration 1) Remove the nut of the fan and then pull up the fan. (see CJ_MCD1_017) CJ_MCD1_017 2) Remove 2 screws of fixing board and 3 nuts of fan motor.
  • Page 148 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.7 Evaporator Procedure Illustration 1) Remove 2 screws of pipe clamp board. (see CJ_MCD1_019) CJ_MCD1_019 2) Remove 4 screws of the evaporator fi- xing bracket and then remove it. (see CJ_MCD1_020) CJ_MCD1_020 Note: This section is for reference only.

  • Page 149: Indoor Units Disassembly - Ducted Medium

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 12. Indoor Unit Disassembly - Ducted Medium Contents Indoor Unit Disassembly 1.1 Electrical Parts (Antistatic gloves must be worn.) 1.2 Fan Motor and Fan 1.3 Evaporator...
  • Page 150 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Indoor Unit Disassembly 1.1 Electrical Parts (Antistatic gloves must be worn.) Procedure Illustration 1) Remove 5 screws of the cover of elec- tronic control box and then remove the cover.
  • Page 151 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Disconnect the connectors and then re- move the front main control board. (see CJ_A6_003) CJ_A6_003 4) Turn over the electronic control box. Disconnect the connectors and remove 2 screws of rear main control board.
  • Page 152 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 5) Remove 2 screws of reactor and remove the reactor. (see CJ_A6_005) CJ_A6_005 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 153 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.2 Fan motor and fan Procedure Illustration 1) Remove 10 screws of the top cover and then remove the top cover. (see CJ_A6_006) CJ_A6_006 2) Release 3 hooks of volute shell. (see CJ_A6_007) CJ_A6_007 Note: This section is for reference only.
  • Page 154 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove the fixing screws of fan (2 screws). (see CJ_A6_008) CJ_A6_008 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 155 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.3 Evaporator Procedure Illustration 1) Remove 9 Screws of the water collecter and remove the water collecter. (see CJ_A6_009) CJ_A6_009 2) Remove the screws of the pipe clamp board and the left side board (3 for the pipe clamp and 9 for left side board).
  • Page 156 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove 2 screws of the evaporator support and then pull up the temperature sensor. (see CJ_A6_011) CJ_A6_011 4) Remove the screw of the evaporator and then remove it.

  • Page 157: Indoor Units Disassembly - Floor Ceiling

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 13. Indoor Unit Disassembly - Floor Ceiling Contents Indoor Unit Disassembly Front Panel Electrical Parts (Antistatic gloves must be worn.) Fan Motor and Fan Evaporator Display Board...
  • Page 158 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Indoor Unit Disassembly 1.1 Front Panel Procedure Illustration 1) Remove 2 screws of return air grille subassembly and release 2 hooks. (see CJ_FC_001) CJ_FC_001 2) Release 2 hooks for each filter, and then pull up the filter.
  • Page 159 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.2 Electrical Parts (Antistatic gloves must be worn.) Note: Remove the front panel (refer to 1.1 Front panel) before disassembling electrical part. Procedure Illustration 1) Remove 4 screws of the cover of elec- tronic control box and then remove the cover.
  • Page 160 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.3 Fan motor and fan Note: Remove the front panel (refer to 1.1 Front panel) before disassembling fan motor and fan. Procedure Illustration 1) Remove the fix screw of supporting board. (see CJ_FC_005) CJ_FC_005 2) Remove the screws of fan motor support...
  • Page 161 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove the two screws of the fan motor shaft. (see CJ_FC_007) CJ_FC_007 4) Release the hooks of the volute shell and then pull up it. (see CJ_FC_008) CJ_FC_008 Note: This section is for reference only.
  • Page 162 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 5) Remove the screws of fan (3 screws). (see CJ_FC_009) CJ_FC_009 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 163 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.4 Evaporator Note: Remove the front panel (refer to 1.1 Front panel) before disassembling evaporator. Procedure Illustration 1) Remove the screws of left and right pa- nel and then push it in the direction shown in the figure to move it.
  • Page 164 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove the 1 screw of the water col- lector. (see CJ_FC_012) CJ_FC_012 4) Remove 3 screws of board and then re- move it. (see CJ_FC_013) CJ_FC_013 Note: This section is for reference only.
  • Page 165 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 5) Remove the screws of the pipe clamp board. (see CJ_FC_014) CJ_FC_014 6) Pull up the temperature sensor. (see CJ_FC_015) CJ_FC_015 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 166 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 7) Remove the screws of the front eva- porator support (5 screws). (see CJ_FC_016) CJ_FC_016 8) Remove the screws of the rear eva- porator support then pull out the eva- porator (4 screws).
  • Page 167 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.5 Display Board Procedure Illustration 1) Remove 2 screws of display board and remove the display. (see CJ_ FC_019) CJ_FC_019 Note: This section is for reference only. Actual unit appearance may vary.

  • Page 168: Outdoor Units Disassembly

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 14. Outdoor Unit Disassembly Contents Outdoor Unit Disassembly Panel Plate Electrical Parts Fan Assembly Fan Motor Sound Blanket Four-way Valve Compressor...

  • Page 169: Panel Plate

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1. Outdoor Unit Disassembly 1.1 Panel Plate Models HCKI (351, 531) ZA-1 Procedure Illustra�on 1) Turn off the air condi�oner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw).
  • Page 170 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 4) Remove the screws of water collecting cover and then remove the water collecting cover (2 screws). (see CJ_X230_003) Water Collecting Cover CJ_X230_003 5) Remove the screws of the front panel and then remove the front panel (9 screws).
  • Page 171 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (5 screws). (see CJ_X230_005) Right Panel CJ_X230_005 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 172 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCKI 711 ZA-1 Procedure Illustra�on 1) Turn off the air condi�oner and the power breaker. 2) Remove the screw of the big handle and then remove the big handle (1 screw). (see CJ_X430_001).
  • Page 173 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustra�on 4) Remove the screws of water collec�ng co- ver and then remove the water collec�ng co- ver (2 screws). (see CJ_ X430_003) Water Collec�ng Cover CJ_X430_003 5) Remove the screws of the front panel and then remove the front panel (9 screws).
  • Page 174 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 6) Remove the screws of the right panel and then remove the right panel (6 screws). (see CJ_X430_005) Right Panel CJ_X430_005 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 175 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCSI 1081 ZA-1 Procedure Illustra�on 1) Turn off the air condi�oner and the power breaker. Big Handle 2) Remove the screws of the big handle, then remove the big handle (2 screws).
  • Page 176 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 4) Remove the screws of the front right pa- nel and then remove the front right panel (2 screws). (see CJ_D30_003) Front Right Panel CJ_D30_003 5) Remove the screws of the front panel and then remove the front panel (9 screws).
  • Page 177 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 6) Remove the screws of water collecting co- ver and then remove the water collecting co- ver (2 screws). (see CJ_ D30_005) Water Collecting Cover CJ_D30_005 7) Remove the screws of the rear net and then remove the rear net (2 screws) (for some...
  • Page 178 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustra�on 8) Remove the screws of the right panel and then remove the right panel (8 screws). (see CJ_D30_007) Right Panel CJ_D30_007 Note: This sec�on is for reference only. Actual unit appearance may vary.
  • Page 179 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Models HCSI (1401, 1601) ZA Procedure Illustra�on 1) Turn off the air condi�oner and the power breaker. 2) Remove the screws of the big handle, then remove the big handle (2 screws).
  • Page 180 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 5) Remove the screws of the front right panel and then remove the front right panel (2 screws). (see CJ_E30_004) CJ_E30_004 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 181 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustra�on 1) Remove the screws of the front panel, then remove the front panel (7screws). (see CJ_E30_005) CJ_E30_005 2) Remove the screws of the right panel and then remove the right panel (10 screws).

  • Page 182: Electrical Parts

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.2 Electrical parts WARNING: Antistatic gloves must be worn when you disassemble the electronic box. Note: Remove the air outlet grille (refer to 1.1 Panel Plate) before disassembling electrical parts.
  • Page 183 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Models HCKI (351, 531) ZA-1 Procedure Illustra�on 1) Disconnect the connector for compres- sor and release the ground wire (1 screw). (see CJ_ODU_ PCB_016-1) CJ_ODU_PCB_016-1 2) Pull out the wires from electrical sup- por�ng plate and turn over the electronic control assembly.
  • Page 184 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustra�on 4) Remove the fixing board (2 hooks). (see CJ_ODU_PCB_016-4). CJ_ODU_PCB_016-4 5) Disconnect the connectors from the e- lectronic control board. (see CJ_ODU_PCB_016-5). CJ_ODU_PCB_016-5 6) Then remove the electronic control bo- ard (4 hooks).
  • Page 185 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCKI 711 ZA-1 Procedure Illustra�on 1) Remove the screws and unfix the hooks, then open the electronic control box cover (5 screws and 2 hooks). (see CJ_ODU_PCB_006-1.
  • Page 186 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Model HCSI 1081 ZA-1 Procedure Illustra�on 1) Unfix the hooks and then open the elec- tronic control box cover (4 hooks). (see CJ_ODU_PCB_010-1) CJ_ODU_PCB_010-1 2) Remove 4 screws on the electronic con- trol board and then turn over the electronic control board.
  • Page 187 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustra�on 3) Pull out the connectors. (see CJ_ ODU_PCB_010-3) 4) Remove the 9 screws and unfix the 3 hooks and then remove the electronic control board. (see CJ_ ODU_PCB_010-3) CJ_ODU_PCB_010-3 5) Remove 2 screws and then remove the...
  • Page 188 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 6) Remove 2 screws and 2 connectors and then remove the inverter control board. (see CJ_ODU_ PCB_010-5) Connect to CN301 Connect to FM1 CJ_ODU_PCB_010-5 Note: This section is for reference only.
  • Page 189 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Models HCSI (1401, 1601) ZA-1 Procedure Illustration 1) Pull out the connectors. CJ_ ODU_PCB_017-1 ). (see 2) Remove the 9 screws and unfix the 3 hooks, then remove the electronic con- trol board.

  • Page 190: Fan Assembly

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.3 Fan Assembly Note: Remove the panel plate (refer to 1.1 Panel Plate) before disassembling fan. Procedure Illustra�on 1) Remove the nut securing the fan with a spanner.

  • Page 191: Fan Motor

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.4 Fan Motor Note: Remove the panel plate and the connection of fan motor on PCB (refer to 1.1 Panel Plate and 1.2 Electrical parts) before disassembling fan motor. Procedure Illustration 3) Remove the fixing screws of the fan motor (4...

  • Page 192: Sound Blanket

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.5 Sound blanket Note: Remove the panel plate (refer to 3.1 Panel plate) before disassembling sound blanket. Procedure Illustration 1) Remove the sound blanket (side and top). (see CJ_ODU_BLANKET_001) Sound blanket (top) Sound blanket (side)

  • Page 193: Four-Way Valve

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.6 Four-way valve WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. You should evacuate the system with the vacuum pump; flush the system with nitrogen; then repeat the two steps before heating up the brazed parts.
  • Page 194 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 1.7 Compressor WARNING: Evacuate the system and confirm that there is no refrigerant left in the system before removing the four-way valve and the compressor. You should evacuate the system with the vacuum pump; flush the system with nitrogen; then repeat the two steps before heating up the brazed parts.
  • Page 195 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Procedure Illustration 3) Remove the hex nuts and washers securing the compressor, located on the bottom plate. (see CJ_ODU_COMP_003) CJ_ODU_COMP_003 Suction Pipe 4) Heat up the brazed parts and then remove the discharge pipe and the suction pipe.

  • Page 196: Appendix

    HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 15. Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3 and T4 (°C - K) Temperature Sensor Resistance Value Table for TP (for some units) (°C - K) iii) Pressure On Service Port...
  • Page 197 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 i) Temperature Sensor Resistance Value Table for T1, T2, T3 and T4 (°C - K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm...
  • Page 198 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 ii) Temperature Sensor Resistance Value Table for TP (for some units) (°C - K) °C °F K Ohm °C °F K Ohm °C °F K Ohm °C °F K Ohm...
  • Page 199 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 iii) Pressure On Service Port Cooling chart (R32): ODU(DB) °F(°C) 0(-17) 5(-15) 95 (35) (-9.44) (7.22) (23.89) (29.44) (40.56) (46.11) (48.89) IDU(DB/WB) 70/59 (21.11/15) 10.3 10.8 75/63 (23.89/17.22) 10.9 11.4...
  • Page 200 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Heating chart (R32): ODU(DB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (-27/-28) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) IDU(DB/WB) 55(12.78) 30.9 29.1 25.8 23.3 21.2 18.9 16.8...
  • Page 201 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 System Pressure Table (R32) Pressure Temperature Pressure Temperature °C °F °C °F 14.5 -51.909 -61.436 1850 18.5 268.25 28.425 83.165 21.75 -43.635 -46.543 1900 275.5 29.447 85.005 -37.323 -35.181...
  • Page 202 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Notes __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________...
  • Page 203 HTFU, HTBI, HUCU(I), HSFU(I) ZA(L)(1) - HCK(S)I (351, 531, 711, 1081, 1401, 1601) ZA-1 Notes __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________ __________________________________________________________________________________...
  • Page 204 LIGHT COMMERCIAL 2023 - R32 Refrigerant - Monosplit Units H O K K A I D O s r l Ph. +39 051 4133 111 Via della Salute 14 Fax +39 051 4133 146 40132 Bologna Italy w w w. h o k k a i d o . i t Due to on-going technological development of the products by the manufacturer, we reserve the right to vary the technical specifications at any time without notice.

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