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Hokkaido HKEU 203 ZL Service Manual

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Service Manual
[ Release 1.0 ]
Wall Type Multisplit Indoor Units:
Models HKEU 203 ZL
HKEU 263 ZAL
HKEU 353 ZAL-1
HKEU 533 ZAL
1-Phase 220/240V, 50Hz Power Supply

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Summary of Contents for Hokkaido HKEU 203 ZL

  • Page 1 Service Manual [ Release 1.0 ] Wall Type Multisplit Indoor Units: Models HKEU 203 ZL HKEU 263 ZAL HKEU 353 ZAL-1 HKEU 533 ZAL 1-Phase 220/240V, 50Hz Power Supply...

  • Page 2: Product Overview And Lineup

    PRODUCT OVERVIEW AND LINEUP RESIDENTIAL R32 ACTIVE LINE DC INVERTER Comfort, well-being and air quality Sleep mode Comfort care Silence mode Refrigerant leak detection It allows reducing energy ACTIVE air conditioners This function allows Active only in cooling consumption at night. are equipped the operating speed mode, it allows to...
  • Page 3 2.1 ~ 5.3 kW | 4 available power levels A++/A+ | Seasonal energy efficiency class in cooling/ heating mode Wall HKEU 203 ZL, HKEU 263 ZAL, HKEU 352 ZAL-1, HKEU 533 ZAL -15~50° -15~24 Operating range in cooling ° and heating 21 dB(A) (2.1 kW) | Extremely quiet...

  • Page 4: Table Of Contents

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Table of Contents PRODUCT OVERVIEW AND LINEUP ....................2 1. Safety Precautions ........................... 5 2. Specifications ..........................11 3. Product Features ..........................17 4. Maintenance ...........................26 5. Indoor Unit Disassembly ......................34 6.

  • Page 5: Safety Precautions

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1. Safety Precautions Contents Precautions ........................6 Information servicing (For flammable materials) .............7...

  • Page 6: In Case Of Accidents Or Emergency

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1. Precautions CAUTION To prevent personal injury, or property or unit damage, • • While unpacking be careful of sharp edges around adhere to all precautionary measures and instructions the unit as well as the edges of the fins on the con- denser and evaporator.
  • Page 7 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2. Information servicing • Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no flammable (For flammable materials) hazards or ignition risks.

  • Page 8: Repair To Intrinsically Safe Components

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units • that capacitors are discharged: this shall be done in shall also take into account the effects of aging or a safe manner to avoid possibility of sparking; continual vibration from sources such as compressors or fans.

  • Page 9: Charging Procedures

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units • The refrigerant charge shall be recovered into the • Before attempting the procedure ensure that: correct recovery cylinders. The system shall be flushed • mechanical handling equipment is available, if with OFN to render the unit safe.
  • Page 10 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units • Empty recovery cylinders are evacuated and, if • The recovered refrigerant shall be returned to the possible, cooled before recovery occurs. refrigerant supplier in the correct recovery cylinder, and the relevant Waste Transfer Note arranged.

  • Page 11: Specifications

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2. . Specifications Contents Model Reference ......................12 Pipe Length and Drop Height between the Units ............13 Electrical Wiring Diagrams ....................14...

  • Page 12: Model Reference

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1. Model Reference Refer to the following table to determine the specific indoor unit model. Indoor Unit Model Capacity (Btu/h) Power Supply HKEU 203 ZL HKEU 263 ZAL 220-240V~, 50Hz, 1Phase HKEU 353 ZAL-1 HKEU 533 ZAL...
  • Page 13 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2. Pipe Length and Drop Height between the Units Please refer to the Installation Manual and to the Service Manual of the Outdoor Units.

  • Page 14: Electrical Wiring Diagrams

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 3. Electrical Wiring Diagrams Indoor units unit wiring diagram: Indoor Units IDU Model IDU Wiring Diagram HKEU 203 ZL HKEU 263 ZAL 16022000020169 HKEU 353 ZAL-1 HKEU 533 ZAL...
  • Page 15 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units • Indoor Units’ Wiring Diagram abbreviations Abbreviation Paraphrase Yellow-Green Conductor Positive and Negative Ion Generator Capacitor Electronic Dust Collector PLASMA LIVE NEUTRAL The Electric Heating Belt of Indoor Unit Heater Indoor Room Temperature Coil Temperature of Indoor Heat Exchanger...
  • Page 16 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units • Models: HKEU 203 ZL, HKEU 263 ZL, HKEU 353 ZAL-1, HKEU 533 ZAL OPTIONAL OPTIONAL Ionizer OPTIONAL...

  • Page 17: Product Features

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 3. Product Features Contents MODEL HKEU 203 ZL .....................18 MODELS HKEU (263, 353, 533) ZAL(-1) ................11...
  • Page 18 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1. . MODEL HKEU 203 ZL 3. . Display function 1. . Abbreviation Unit display functions Unit element abbreviations: Abbreviation Element Indoor room temperature. fresh defrost run timer Coil temperature of evaporator.
  • Page 19 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 6. . Heating Mode 6.1 Indoor Fan Control 9. . Forced operation function • When the compressor is on, the indoor fan speed can be set •...
  • Page 20 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 12. . 8°C Heating (Option) In heating mode, the temperature can be set to as low as 8°C, preventing the indoor area from freezing if unoccupied during 13.
  • Page 21 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2. . MODELS HKEU (263, 353, 533) ZAL(-1) „ Unit display functions: Unit display functions (follow the display type of your purchased product): fresh defrost run timer fresh defrost run timer fresh defrost run timer...
  • Page 22 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units „ Safety features: 1) Zero crossing detection error protection (except for DC fan units) If AC cannot detect zero crossing signal for 4 minutes or the zero crossing signal time interval is not correct, the unit will stop and the LED will display the failure.
  • Page 23 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.1 Abbreviation Unit element abbreviations: 2.3.2 Evaporator Temperature Protection Abbreviation Element When evaporator temperature drops below a configured Indoor room temperature. value, the compressor and outdoor fan cease operation. Coil temperature of evaporator.

  • Page 24: Drying Mode

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.7 Forced operation function • Auto fan action in heating mode: Press the AUTO/COOL button, the AC will run as in below sequence: T1-Td Forced auto → Forced cooling → Off •...

  • Page 25: Sleep Function

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.8 Sleep function 2.13 Follow Me • If you press “Follow Me” on the remote, the indoor unit will • The sleep function is available in cooling, heating, or auto beep.

  • Page 26: Maintenance

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 4. Maintenance Contents First Time Installation Check ..................27 Refrigerant Recharge ....................29 Re-Installation ......................30 3.1 Indoor Unit .........................30 3.2 Outdoor Unit ......................32...

  • Page 27: First Time Installation Check

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 •...
  • Page 28 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 29: Refrigerant Recharge

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2. Refrigerant Recharge mA A Procedure: Operate the air conditioner in cooling mode to charge the Close both 2- and 3-way valves. system with liquid refrigerant. Slightly connect the Handle Lo charge hose to the When the electronic scale displays the correct weight (re- 3-way service port.

  • Page 30: Re-Installation

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 31 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Air purging with vacuum pump Procedure: Tighten the flare nuts of the indoor and outdoor units, • If the pressure successfully reaches -0.1 MPa and confirm that both the 2- and 3-way valves are (14.5 Psi), fully close the Handle Lo valve, then closed.

  • Page 32: Outdoor Unit

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 33: Refrigerant Charging

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Refrigerant charging mA A Procedure: Close both 2- and 3-way valves. Fully open the Handle Lo manifold valve, 2- and 3-way val- ves. Slightly connect the Handle Lo charge hose to the 3-way Operate the air conditioner in cooling mode to charge the service port.
  • Page 34 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 5. Indoor Units Disassembly Contents MODEL HKEU 203 ZL ....................35 MODELS HKEU (263, 353, 533) ZAL(-1) .................48...
  • Page 35 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1. . MODEL HKEU 203 ZL 1.1 INDOOR UNIT DIMENSIONS „ Model HKEU 203 ZL Model W (mm) D (mm) H (mm)

  • Page 36: Disassembling The Indoor Unit

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1.2 DISASSEMBLING THE INDOOR UNIT 1.2.1 Front Panel Procedure Illustration 1) Hold the front panel by the tabs on the both sides and lift it. Front Panel (see CJ_AF_001.) CJ_AF_001 2) Push up the bottom of an air filter, and then...
  • Page 37 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it. (see CJ_AF_003.) Horizontal Louver Hook CJ_AF_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver.
  • Page 38 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 5) Remove 1 screw and then remove the electrical cover. (see CJ_AF_005-1 and CJ_AF_005-2.) CJ_AF_005-1 CJ_AF_005-2 6) Disconnect the connector for the display board. (see CJ_AF_005-3.) CJ_AF_005-3 CJ_AF_005-4...
  • Page 39 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 8) Open the screw caps (2) and then remove the screws. (see CJ_AF_006.) 9) Release the 4 hooks CJ_AF_006 10) 0) Release the seven hooks in the back. (see CJ_AF_007.) Hooks CJ_AF_007...
  • Page 40 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger. (see CJ_AF_008.) Panel Frame CJ_AF_008 Note: This section is for reference only.
  • Page 41 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1.2.2 Electrical parts (antistatic gloves must be worn) Note: Remove the front panel before disassembling electrical parts. Procedure Illustration 1) ) Remove the fixing screw and then remove the cover of electronic box and the terminal cover.
  • Page 42 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 4) Remove the fixing screw. (see CJ_AF_011-1.) 5) Pull out the Electrical control box along the direction indicated in right image to remove it. (CJ_AF_011-2.) Fixing Screw CJ_AF_011-1...
  • Page 43 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 7) ) Remove the fixing screw, then remove the capacitor of fan motor. (see CJ_AF_013.) Capacitor of Fan Motor CJ_AF_013 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 44 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1.2.3 Evaporator Note: Remove the front panel and electrical parts before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit. (see CJ_AF_014.) Pipe Holder CJ_AF_014...
  • Page 45 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 4) ) Pull out the evaporator. (see CJ_AF_017.) Evaporator CJ_AF_017 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 46 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1.2.4 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator, before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor.

  • Page 47: Step Motor

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 1.2.5 Step motor Note: Remove the front panel and electrical parts (refer to 3.2.1 Front panel, 3.2.2 Electrical parts) before disassembling step motor. Procedure Illustration 1) Remove the 2 screws, then remove the stepping motor.
  • Page 48 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2. . MODELS HKEU (263, 353, 533) ZAL(-1) 2.1 INDOOR UNITS DIMENSIONS „ Models HKEU 263 ZAL, HKEU 353 ZAL-1, HKEU 533 ZAL Models W (mm) D (mm) H (mm)
  • Page 49 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.2 DISASSEMBLING THE INDOOR UNIT 2.2.1 Front Panel Procedure Illustration 1) Hold the front panel by the tabs on the both sides and lift it. Front Panel (see CJ_AF_001.
  • Page 50 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 3) Open the horizontal louver and push the hook towards left to open it. (see CJ_AF_003.) Horizontal Louver Hook CJ_AF_003 4) Bend the horizontal louver lightly by both hands to loosen the hooks, then remove the horizontal louver.
  • Page 51 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 5) Remove 1 screw and then remove the electrical cover. (see CJ_AF_005-1 and CJ_AF_005-2.) CJ_AF_005-1 CJ_AF_005-2 6) Disconnect the connector for the display board. (see CJ_AF_005-3.) CJ_AF_005-3 CJ_AF_005-4...
  • Page 52 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 8) Open the screw caps (2) and then remove the screws. (see CJ_AF_006.) 9) Release the 4 hooks. CJ_AF_006 10) 0) Release the seven hooks in the base. (see CJ_AF_007.) Hooks CJ_AF_007...
  • Page 53 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 11) Pull out the panel frame while pushing the hook through a clearance between the panel frame and the heat exchanger. (see CJ_AF_008.) Panel Frame CJ_AF_008 Note: This section is for reference only.
  • Page 54 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.2.2 Electrical parts (antistatic gloves must be worn) Note: Remove the front panel before disassembling electrical parts. Procedure Illustration 1) ) Remove the fixing screw and then remove the cover of electronic box and the terminal cover.
  • Page 55 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 4) Remove the fixing screw. (see CJ_AF_011-1.) 5) Pull out the Electrical control box along the direction indicated in right image to remove it. (CJ_AF_011-2.) Fixing Screw CJ_AF_011-1...
  • Page 56 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 7) ) Remove the fixing screw, then remove the capacitor of fan motor. (see CJ_AF_013.) Capacitor of Fan Motor CJ_AF_013 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 57 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.2.3 Evaporator Note: Remove the front panel and electrical parts before disassembling evaporator. Procedure Illustration 1) Disassemble the pipe holder located at the rear of the unit. (see CJ_AF_014.) Pipe Holder CJ_AF_014...
  • Page 58 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Procedure Illustration 4) ) Pull out the evaporator. (see CJ_AF_017.) Evaporator CJ_AF_017 Note: This section is for reference only. Actual unit appearance may vary.
  • Page 59 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.2.4 Fan motor and fan Note: Remove the front panel, electrical parts and evaporator before disassembling fan motor and fan. Procedure Illustration 1) Remove the two screws and remove the fixing board of the fan motor.
  • Page 60 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 2.2.5 Step motor Note: Remove the front panel and electrical parts before disassembling step motor. Procedure Illustration 1) Remove the 2 screws, then remove the stepping motor. (see CJ_AF_021.) Stepping Motor CJ_AF_021...
  • Page 61 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 6. Troubleshooting Contents Safety Caution .......................62 General Troubleshooting ....................63 Complain Record Form ....................65 Information Inquiry .......................67 Error Diagnosis and Troubleshooting without Error Code ..........70 Quick Maintenance by Error Code ..................76 Troubleshooting by Error Code ..................77 Check Procedures ......................86...

  • Page 62: Safety Caution

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 yourself with antistatic gloves or wrist strap to avoid damage to the board.

  • Page 63: General Troubleshooting

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 64 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units For some models (such as HKEU 203 ZL) 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 65: Complain Record Form

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 3. Complain Record Form Complain Record Form Request No. : Date : Installation Date : Service Date : Customer Information Telephone No. Name Home Address Email Product Information Outdoor Unit Model Indoor Unit Models...
  • Page 66 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Parameter Checking information by Remote controller Displaying code Displaying code meaning Display value Display value meaning Room temperature Indoor coil temperature Outdoor coil temperature Ambient temperature Outlet temperature of indoor coil Discharge temperature...

  • Page 67: Information Inquiry

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 4. Information Inquiry • To enter information inquiry status, complete the following procedure within 10 seconds: 1) Press 3 times LED button on the IR Remote Control. 2) Press 3 times SWING button on the IR Remote Control.
  • Page 68 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Meaning Additional Notes Displayed Code Explanation Displayed value Room temp. 1. All displayed temperatures use actual values. Indoor coil temp. 2. All temperatures are dis- -1F,-1E,-1d,-1c,- -25,-24,-23,-22, played in °C regardless of re- 1b,-1A...
  • Page 69 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Displayed Code Explanation Displayed Value Meaning Additional Notes 0-FF 2-28 Reserved 5-20 5-25...

  • Page 70: Error Diagnosis And Troubleshooting Without Error Code

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 71: Remote Maintenance

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 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 72 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 73: Field Maintenance

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 5.2 Field maintenance Problem 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 74: Electrical Circuit

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Electrical Circuit 2.Field Maintenance 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 Unit runs, but shortly stops...
  • Page 75 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Refrigerant Circuit Others...

  • Page 76: Quick Maintenance By Error Code

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 6. Quick Maintenance by Error Code f you do not have the time to test whether specific parts are faulty, you can directly change the required parts according to the error code.

  • Page 77: Troubleshooting By Error Code

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7. Troubleshooting by Error Code 7.1 E0 / EH 00 / F4 / 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 78: Troubleshooting And Repair

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7.2 E1 / EL 01 (Indoor and Outdoor Unit communication error diagnosis and solution) Description: Indoor Unit can not communicate with Outdoor Unit. Recommended parts to prepare: •...
  • Page 79 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Remarks: • Use a multimeter to test the DC voltage between 2 port (or S or L2 port) and 3 port (or N or S port) of outdoor unit. The Red pin of multimeter connects with 2 port (or S or L2 port), while the Black pin is for 3 port (or N or S port).
  • Page 80 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7.3 E2 / EH 02 (Zero crossing detection error diagnosis and solution) Description: When PCB does not receive zero crossing signal feedback for 4 minutes or the zero crossing signal time interval is abnormal.
  • Page 81 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7.4 E3 / EH 03 / F5 / EC 07 (Fan speed is operating outside of the normal range diagnosis and solution) Description: When the indoor / outdoor fan speed keeps too low or too high for a certain time, the LED displays the failure code and the AC turns off.
  • Page 82 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Index: 1. Indoor 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 shown in below table, the PCB must have problems and needs to be replaced.
  • Page 83 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7.5 E4 / EH 60 / E5 / EH 61 / F1 / EC 53 / F2 / EC 52 / F3 / EC 54 (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 code.
  • Page 84 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7.6 E7 / EH / 0b (Indoor PCB / Display board communication error diagnosis and solution) Description: Indoor PCB does not receive feedback from the display board. Recommended parts to check or to prepare: •...
  • Page 85 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7.7 EC / EL 0C (Refrigerant Leakage Detection diagnosis and solution) Description: Define the evaporator coil temp. T2 of the compressor when it just starts running, as “Tcool”. In the beginning 8 minutes after the compressor starts up, if T2 <...

  • Page 86: Check Procedures

    HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 com- pressor and coil have returned to normal temperature to avoid any injuries.
  • Page 87 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 7. Appendix Contents Temperature Sensor Resistance Value Table for T1, T2, T3 and T4 (°C - K) ......88 Temperature Sensor Resistance Value Table for TP (for some units) (°C - K) .....89 iii) Pressure On Service Port ....................90...
  • Page 88 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 89 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 90 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 91 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Heating chart (R32): ODU(DB/WB) 57/53 47/43 37/33 27/23 17/13 (-8.33/- 0/-2 -17/-18 °F(°C) (13.89/11.67) (8.33/6.11) (2.78/0.56) (-2.78/-5) 10.56) (-17/-19) (-27/-28) IDU(DB) 55(12.78) 30.9 29.1 25.8 23.3 21.2 18.9 16.8...
  • Page 92 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units 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 1950...
  • Page 93 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Notes Notes-1...
  • Page 94 HKEU (203, 263, 353, 533) Z(A)L(-1) - Wall Mounted Type - Multisplit Indoor Units Notes Notes-2...
  • Page 95 ACTIVE LINE - Wall Mounted Type - Multisplit Indoor 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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