Daikin EUWL KZW1 Series Service Manual
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Daikin EUWL KZW1 Series Service Manual

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Summary of Contents for Daikin EUWL KZW1 Series

  • Page 3 ESIE-0303 Table of Contents Introduction About This Manual .................. i–v Part 1 System Outline General Outline What Is in This Chapter? ................ 1–3 Technical Specifications: EUW5-10KZW1 ..........1–4 Technical Specifications: EUW12-20KZW1 ..........1–6 Technical Specifications: EUW24KZW1 ..........1–8 Technical Specifications: EUWL5-10KZW1 ..........1–10 Technical Specifications: EUWL12-20KZW1 ..........

  • Page 4: Table Of Contents

    ESIE-0303 Wiring Layout What Is in This Chapter? ................. 1–43 Main Functions of the EUW5-24KZW1 and EUWL5-24KZW1 ....1–44 Switch Box Layout: EUW5-12KZW1............1–45 Switch Box Layout: EUW16-24KZW1............1–47 PCB Layout of the EUW5-24KZW1 and EUWL5-24KZW1...... 1–49 Wiring Diagram ..................1–53 Part 2 Functional Description...
  • Page 5 ESIE-0303 Malfunction Indications and Safeties Overview What Is in This Chapter? ................ 3–7 Malfunction Indications Overview ............3–8 Safeties Overview ................... 3–10 Checking the Inputs and Outputs What is in This Chapter?................. 3–13 Checking the Temperature Sensors ............3–14 Controller Sensors: R3T, R4T and R5T ..........3–15 Checking the Digital Inputs and Outputs..........
  • Page 6 ESIE-0303 Test Run and Operation Data What Is in This Chapter? ................. 4–15 Currents and Used Fuses ................ 4–16 Part 5 Maintenance Maintenance What Is in This Chapter ................5–3 Maintenance of the Main Parts ..............5–4 Maintenance of the Control Devices ............5–6 Periodical Checks ..................

  • Page 7: Part

    This service manual contains all the information you need to carry out the necessary repair and manual maintenance tasks for the EUW5-24KZW1. EUW5-24KZW1 The Daikin EUW5-24KZ water-cooled water chillers: ■ Are designed for indoor installation. ■ Are used for cooling and heating applications.

  • Page 8: Esie

    Introduction ESIE-0303...
  • Page 9 ESIE-0303 Part 1 System Outline Introduction This part contains an outline of all the relevant elements in the EUW5-24KZW1 and EUWL5-24KZW1 installation. What is in this part? This part contains the following chapters: Chapter See page 1–General Outline 1–3 2–Piping Layout 1–29 3–Wiring Layout 1–43...
  • Page 10 ESIE-0303 1–2 Part 1 – System Outline...

  • Page 11: What Is In This Chapter?

    ESIE-0303 General Outline Part 1 General Outline What Is in This Chapter? Introduction This chapter contains the following information: ■ Technical specifications ■ Electrical specifications ■ Installation outline of a typical installation ■ Outlook drawings: outlook, dimensions, installation and service space. Overview This chapter contains the following topics: Topic...

  • Page 12: Technical Specifications: Euw5-10Kzw1

    General Outline ESIE-0303 Technical Specifications: EUW5-10KZW1 Technical The table below contains the technical specifications. specifications Model EUW5KZW1 EUW8KZW1 EUW10KZW1 Nominal cooling 13.0 kW 21.5 kW 28.0 kW capacity Nominal cooling input 3.71 kW 5.96 kW 7.76 kW Capacity steps Compressor Type Hermetically sealed scroll Speed...
  • Page 13 ESIE-0303 General Outline Model EUW5KZW1 EUW8KZW1 EUW10KZW1 Casing Material Polyester coated / galvanised steel plate Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044 64 dB Sound power level ■ Low-pressure switch ■ High-pressure switch ■ Evaporating temperature protection ■...

  • Page 14: Technical Specifications: Euw12-20Kzw1

    General Outline ESIE-0303 Technical Specifications: EUW12-20KZW1 Technical The table below contains the technical specifications. specifications Model EUW12KZW1 EUW16KZW1 EUW20KZW1 Nominal cooling 32.5 kW 43.0 kW 56.0 kW capacity Nominal cooling input 9.1 kW 12.1 kW 16.0 kW Capacity steps Compressor Type Hermetically sealed scroll Speed...
  • Page 15 ESIE-0303 General Outline Model EUW12KZW1 EUW16KZW1 EUW20KZW1 Casing Material Polyester coated / galvanised steel plate Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044 71 dB 67 dB Sound power level ■ Low-pressure switch ■ High-pressure switch ■ Evaporating temperature protection ■...

  • Page 16: Technical Specifications: Euw24Kzw1

    General Outline ESIE-0303 Technical Specifications: EUW24KZW1 Technical The table below contains the technical specifications. specifications Model EUW24KZW1 Nominal cooling capacity 65.0 kW Nominal cooling input 18.3 kW Capacity steps Compressor Type Hermetically sealed scroll Speed 2900 rpm No. x model 2 x JT335DA-YE Evaporator Type...
  • Page 17 ESIE-0303 General Outline Model EUW24KZW1 Material Polyester coated / galvanised steel plate Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044 74 dB Sound power level ■ Low-pressure switch ■ High-pressure switch ■ Evaporating temperature protection ■ Discharge temperature protection ■...

  • Page 18: Technical Specifications: Euwl5-10Kzw1

    General Outline ESIE-0303 Technical Specifications: EUWL5-10KZW1 Technical The table below contains the technical specifications. specifications Model EUWL5KZW1 EUWL8KZW1 EUWL10KZW1 Nominal cooling 12.1 kW 20.0 kW 26.8 kW capacity Nominal cooling input 4.2 kW 6.7 kW 8.7 kW Capacity steps Compressor Type Hermetically sealed scroll Speed...
  • Page 19 ESIE-0303 General Outline Model EUWL5KZW1 EUWL8KZW1 EUWL10KZW1 Weight Machine weight 104 kg 138 kg 144 kg Casing Material Polyester coated / galvanised steel plate Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044 64 dB Sound power level ■...

  • Page 20: Technical Specifications: Euwl12-20Kzw1

    General Outline ESIE-0303 Technical Specifications: EUWL12-20KZW1 Technical The table below contains the technical specifications. specifications Model EUWL12KZW1 EUWL16KZW1 EUWL20KZW1 Nominal cooling 31.2 kW 40.0 kW 53.7 kW capacity Nominal cooling input 10.2 kW 13.5 kW 18.0 kW Capacity steps Compressor Type Hermetically sealed scroll Speed...
  • Page 21 ESIE-0303 General Outline Model EUWL12KZW1 EUWL16KZW1 EUWL20KZW1 Weight Machine weight 149 kg 252 kg 265 kg Casing Material Polyester coated / galvanised steel plate Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044 71 dB 67 dB Sound power level ■...

  • Page 22: Technical Specifications: Euwl24Kzw1

    General Outline ESIE-0303 Technical Specifications: EUWL24KZW1 Technical The table below contains the technical specifications. specifications Model EUWL24KZW1 Nominal cooling capacity 62.4 kW Nominal cooling input 20.4 kW Capacity steps Compressor Type Hermetically sealed scroll Speed 2900 rpm Crankcase heater 2 x 33 W No.
  • Page 23 ESIE-0303 General Outline Model EUWL24KZW1 Casing Material Polyester coated / galvanised steel plate Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044 74 dB Sound power level ■ Low-pressure switch ■ High-pressure switch ■ Evaporating temperature protection ■ Discharge temperature protection ■...

  • Page 24: Electrical Specifications: Euw5-10Kzw1

    General Outline ESIE-0303 Electrical Specifications: EUW5-10KZW1 Electrical The table below contains the electrical specifications. specifications Model EUW5KZW1 EUW8KZW1 EUW10KZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 49 A 79 A 109 A Nominal running 6.6 A...

  • Page 25: Electrical Specifications: Euw12-20Kzw1

    ESIE-0303 General Outline Electrical Specifications: EUW12-20KZW1 Electrical The table below contains the electrical specifications. specifications Model EUW12KZW1 EUW16KZW1 EUW20KZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 129 A 93 A 127 A Nominal running 15.0 A...

  • Page 26: Electrical Specifications: Euw24Kzw1

    General Outline ESIE-0303 1.10 Electrical Specifications: EUW24KZW1 Electrical The table below contains the electrical specifications. specifications Model EUW24KZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 149 A Nominal running 30 A current Max.

  • Page 27: Electrical Specifications: Euwl5-10Kzw1

    ESIE-0303 General Outline 1.11 Electrical Specifications: EUWL5-10KZW1 Electrical The table below contains the electrical specifications. specifications Model EUWL5KZW1 EUWL8KZW1 EUWL10KZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 49 A 79 A 109 A Nominal running 6.6 A...

  • Page 28: Electrical Specifications: Euwl12-20Kzw1

    General Outline ESIE-0303 1.12 Electrical Specifications: EUWL12-20KZW1 Electrical The table below contains the electrical specifications. specifications Model EUWL12KZW1 EUWL16KZW1 EUWL20KZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 129 A 93 A 127 A Nominal running 15.0 A...

  • Page 29: Electrical Specifications: Euwl24Kzw1

    ESIE-0303 General Outline 1.13 Electrical Specifications: EUWL24KZW1 Electrical The table below contains the electrical specifications. specifications Model EUWL24KZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 149 A Nominal running 30 A current Max.

  • Page 30: Outlook Drawing: Euw5-8-10-12Kzw1

    General Outline ESIE-0303 1.14 Outlook Drawing: EUW5-8-10-12KZW1 EUW5-8-10- The illustration below shows the outlook, the dimensions and the installation and service space of the 12KZW1 unit (mm). Required service space around the unit View A-A Components The table below lists the components. Component Component Compressor...
  • Page 31 ESIE-0303 General Outline Component Component Evaporator entering water Flow switch pipe temperature sensor Freeze-up sensor Part 1 – System Outline 1–23...

  • Page 32: Outlook Drawing: Euw16-20-24Kzw1

    General Outline ESIE-0303 1.15 Outlook Drawing: EUW16-20-24KZW1 EUW16-20-24KZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the unit (mm). Required service space around the unit View A-A Components The table below lists the components. Component Component Compressor...
  • Page 33 ESIE-0303 General Outline Component Component Evaporator entering water Flow switch pipe temperature sensor Freeze-up sensor Part 1 – System Outline 1–25...

  • Page 34: Outlook Drawing: Euwl5-8-10-12Kzw1

    General Outline ESIE-0303 1.16 Outlook Drawing: EUWL5-8-10-12KZW1 EUWL5-8-10- The illustration below shows the outlook, the dimensions and the installation and service space of the 12KZW1 unit (mm). Required service space around the unit View A-A Only for 8-10-12HP View A-A Only for 5HP Components The table below lists the components.

  • Page 35: Outlook Drawing: Euwl16-20-24Kzw1

    ESIE-0303 General Outline 1.17 Outlook Drawing: EUWL16-20-24KZW1 EUWL16-20- The illustration below shows the outlook, the dimensions and the installation and service space of the 24KZW1 unit (mm). Required service space around the unit View A-A Components The table below lists the components. Component Component Compressor...
  • Page 36 General Outline ESIE-0303 Component Component Liquid stop valve Main switch Evaporator entering water Flow switch pipe temperature sensor 1–28 Part 1 – System Outline...

  • Page 37: What Is In This Chapter?

    ESIE-0303 Piping Layout Part 1 Piping Layout What Is in This Chapter? Introduction This chapter describes the internal refrigeration circuit. The water piping is considered to be common practice and is, therefore, not described. Overview This chapter contains the following topics: Topic See page 2.2–Functional Diagram Refrigeration and Water Circuit: EUW5-8-10-12KZW1...

  • Page 38: Functional Diagram Refrigeration And Water Circuit Euw5-8-10-12Kzw1

    Piping Layout ESIE-0303 Functional Diagram Refrigeration and Water Circuit: EUW5-8-10-12KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUW5-8-10-12KZW1. It is also applicable to glycol applications. 1–30 Part 1 – System Outline...
  • Page 39 ESIE-0303 Piping Layout Symbols The table below describes the symbols. Symbol Description Symbol Description Compressor motor 1 Check valve S1HP High-pressure switch Flare connection Outlet water evaporator Screw connection temperature sensor Freeze-up protection Flange connection Inlet water condenser Pinched pipe temperature sensor S33T Discharge temperature controller...
  • Page 40 Piping Layout ESIE-0303 Components The table below describes the components. refrigeration side Component Function / remark Compressor A hermetically sealed scroll compressor. Water-heat exchanger The water-heat exchanger is of the brazed plate-heat exchanger (evaporator, type. condenser) Expansion valve The thermostatic expansion valve is set up to control the superheat between 5°C and 7°C.

  • Page 41: Functional Diagram Refrigeration And Water Circuit Euw16-20-24Kzw1

    ESIE-0303 Piping Layout Functional Diagram Refrigeration and Water Circuit: EUW16-20-24KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUW16-20-24KZW1. It is also applicable to glycol applications. Part 1 – System Outline 1–33...
  • Page 42 Piping Layout ESIE-0303 Symbols The table below describes the symbols. Symbol Description Symbol Description M1-2C Compressor motor Check valve S1HP High-pressure switch Flare connection S2HP High-pressure switch Screw connection S4LP Low-pressure switch Flange connection S5LP Low-pressure switch Pinched pipe Inlet water evaporator Spinned pipe temperature sensor Freeze-up protection...
  • Page 43 ESIE-0303 Piping Layout Components The table below describes the components. refrigeration side Component Function / remark Compressor A hermetically sealed scroll compressor. Water-heat exchanger The water-heat exchanger is of the brazed plate-heat exchanger (evaporator, type. condenser) Expansion valve The thermostatic expansion valve is set up to control the superheat between 5°C and 7°C.

  • Page 44: Functional Diagram Refrigeration And Water Circuit Euwl5-8-10-12Kzw1

    Piping Layout ESIE-0303 Functional Diagram Refrigeration and Water Circuit: EUWL5-8-10-12KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUWL5-8-10-12KZW1. It is also applicable to glycol applications. 1–36 Part 1 – System Outline...
  • Page 45 ESIE-0303 Piping Layout Symbols The table below describes the symbols. Symbol Description Symbol Description Compressor motor 1 Check valve S1HP High-pressure switch Flare connection Inlet water evaporator Screw connection temperature sensor Freeze-up protection Flange connection Liquid solenoid valve Pinched pipe Discharge teperature controller Spinned pipe S4LP...
  • Page 46 Piping Layout ESIE-0303 Components The table below describes the components. refrigeration side Component Function / remark Compressor A hermetically sealed scroll compressor. Water-heat exchanger The water-heat exchanger is of the brazed plate-heat exchanger (evaporator)) type. Expansion valve The thermostatic expansion valve is set up to control the superheat between 5°C and 7°C.

  • Page 47: Functional Diagram Refrigeration And Water Circuit Euwl16-20-24Kzw1

    ESIE-0303 Piping Layout Functional Diagram Refrigeration and Water Circuit: EUWL16-20-24KZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration and water circuit of EUWL16-20-24KZW1. It is also applicable to glycol applications. Part 1 – System Outline 1–39...
  • Page 48 Piping Layout ESIE-0303 Symbols The table below describes the symbols. Symbol Description Symbol Description Liquid solenoid valve Inlet water condenser temperature sensor Liquid solenoid valve Discharge temperature controller Compressor motor Discharge temperature controller Compressor motor Check valve S1HP High-pressure switch Flare connection S2HP High-pressure switch...
  • Page 49 ESIE-0303 Piping Layout Components The table below describes the components. refrigeration side Component Function / remark Compressor A hermetically sealed scroll compressor. Water-heat exchanger The water-heat exchanger is of the brazed plate-heat exchanger (evaporator) type. Expansion valve The thermostatic expansion valve is set up to control the superheat between 5°C and 7°C.
  • Page 50 Piping Layout ESIE-0303 1–42 Part 1 – System Outline...

  • Page 51: Wiring Layout

    ESIE-0303 Wiring Layout Part 1 Wiring Layout What Is in This Chapter? Introduction This chapter contains the following information: ■ Main functions of the EUW5-24KZW1 and EUW(L)5-24KZW1 ■ Switch box layout ■ Wiring diagram Overview This chapter contains the following topics: Topic See page 3.2–Main Functions of the EUW5-24KZW1 and EUWL5-24KZW1...

  • Page 52: Main Functions Of The Euw5-24Kzw1 And Euwl5-24Kzw1

    Wiring Layout ESIE-0303 Main Functions of the EUW5-24KZW1 and EUWL5-24KZW1 Main functions The table below describes the components connected to the µcontroller. Wiring diagram symbol Ter- Signal Connection Description minal Connector I/O PCB ID1-GND X71A X65A S10L Flow switch (5-10) ID2-GND Remote cool/heat ID3-GND...

  • Page 53: Switch Box Layout: Euw5-12Kzw1

    ESIE-0303 Wiring Layout Switch Box Layout: EUW5-12KZW1 Switch box layout The illustration below shows the switch box layout of EUW5-12KZW1. Detail 1 Detail 1 Part 1 – System Outline 1–45...
  • Page 54 Wiring Layout ESIE-0303 Components The table below describes the components. Wiring diagram Number Description symbol TR1 & TR2 Power supply transformator I/O PCB assembly Microchiller compact Magnetic contactor Auxiliary contact for K1M & K2M Overcurrent relay Omegarail stopper Omegarail S12M Main switch Inlet water evaporator temperature sensor Outlet water evaporator temperature sensor...

  • Page 55: Switch Box Layout: Euw16-24Kzw1

    ESIE-0303 Wiring Layout Switch Box Layout: EUW16-24KZW1 Switch box layout The illustration below shows the switch box layout of EUW16-24KZW1. Detail 1 Detail 1 Part 1 – System Outline 1–47...
  • Page 56 Wiring Layout ESIE-0303 Components The table below describes the components. Wiring diagram Number Description symbol TR1 & TR2 Power supply transformator I/O PCB assembly Microchiller compact Omegarail Omegarail stopper Magnetic contactor Auxiliary contact for K1M & K2M Magnetic contactor S12M Main switch K4S &...
  • Page 57 ESIE-0303 Wiring Layout PCB Layout of the EUW5-24KZW1 and EUWL5-24KZW1 PCB layout The illustration below shows the I/O PCB layout of chiller types EUW5-24KZW1 and EUWL5-24KZW1. X73A X50A X55A X79A X80A X78A X70A X52A X53A Part 1 – System Outline 1–49...
  • Page 58 Wiring Layout ESIE-0303 Components The table below describes the components. Wiring diagram Connector Description symbol (L1, N, L3) Power supply L1, N, L3 TR Pri. Transformer primary TR. Sec Transformer secondary TR Pri. Transformer primary TR. Sec Transformer secondary S1HP High pressure switch of circuit 1 S2HP High pressure switch of circuit 2...
  • Page 59 ESIE-0303 Wiring Layout Wiring diagram Connector Description symbol X71A X1 (B1, 2, 3, Gnd, To A1P X1 (B1, B2, B3, Gnd) (ID1, ID2, ID3, ID4, ID5, ID1, ID2, ID3, ID4, Gnd) ID5, Gnd) X81A Crankcase heater 1 X82A Crankcase heater 2 (H3P, H4P, H5P, H6P, Connection for field wiring Y3R)
  • Page 60 Wiring Layout ESIE-0303 1–52 Part 1 – System Outline...
  • Page 61 ESIE-0302 Wiring Layout Wiring Diagram Wiring diagram Part 1 – System Outline 1–53...
  • Page 62 Wiring Layout ESIE-0302 1–54 Part 1 – System Outline...

  • Page 63: Functional Description

    ESIE-0303 Part 2 Functional Description Introduction This part contains more detailed information on the functions and controls in the unit. This information can be used as background information for troubleshooting. This part also contains an extensive overview of the functioning of the controllers. Knowledge of the controllers is indispensable and valuable information on servicing and troubleshooting.
  • Page 64 ESIE-0303 2–2 Part 2 – Functional Description...

  • Page 65: What Is In This Chapter?

    ESIE-0303 Functional Description Part 2 Functional Description What Is in This Chapter? Introduction This chapter contains information on the functions used to control the system. Understanding these functions is vital when diagnosing a malfunction that is related to the functional control. Overview This chapter contains the following topics: Topic...

  • Page 66: Operational Range: Euw5-24Kzw1

    Functional Description ESIE-0303 Operational Range: EUW5-24KZW1 Operational range The illustration below shows the operational range of EUW5-24KZW1. °C Glycol Water °C Legend The table below describes abbreviations used in the operational range illustration above. Pattern/ Abbrevia- Description tion Leaving Water Evaporator Leaving Water Condenser Option to produce evaporating leaving water temperature till -5°C Option to produce evaporating leaving water temperature till -10°C...

  • Page 67: Operational Range: Euwl5-24Kzw1

    ESIE-0303 Functional Description Operational Range: EUWL5-24KZW1 Operational range The illustration below shows the operational range of EUWL5-24KZW1. °C Glycol Water °C Legend The table below describes abbreviations used in the operational range illustration above. Pattern/ Abbrevia- Description tion Leaving Water Evaporator Leaving Water Condenser Option to produce evaporating leaving water temperature till -5°C Option to produce evaporating leaving water temperature till -10°C...

  • Page 68: Compressor Working Status

    Functional Description ESIE-0303 Compressor Working Status Compressor The table below gives the conditions of the compressor status. working status The compressor is ON when... The compressor is OFF when... The ON button is pressed The OFF button is pressed Thermostat ON Thermostat OFF No safety activation Safety activation...

  • Page 69: Compressor Timers

    ESIE-0303 Functional Description Compressor Timers Compressor timers The table below shows the timers of the compressor. Timer Interval (s) Guard timer The timer starts counting down when the scroll compressor is switched OFF. During the countdown the compressor can not be restarted. Anti-recycling The timer starts counting down when the scroll compressor timer...

  • Page 70: Thermostat Control: Euw5-24Kzw1 And Euwl5-24Kzw1

    Functional Description ESIE-0303 Thermostat Control: EUW5-24KZW1 and EUWL5-24KZW1 Functional diagram The illustration below shows the thermostat control of 5-12HP. 5-12HP Compressor r1: Cooling set point (default 12°C) Heating set point (default 30°C) 12°C 15°C 27°C 30°C Inlet water temperature evap. (°C) Step Step difference...

  • Page 71: Pump Steering

    ESIE-0303 Functional Description Pump Steering Introduction To prevent the chiller from starting up without a flow, a control is installed to check if there is water flow in the system. Pump lead/ lag time To control the pump lead (15 s) and pump lag (0) timer, the user has to define code v7 and v8 on the controller.

  • Page 72: Functional Description

    Functional Description ESIE-0303 Freeze-up Control Functional The freeze-up control is a protection against ice formation in the water circuit at the evaporator outlet. description Characteristics The table below contains the characteristics of the freeze-up protection. Characteristics Freeze-up protection Control device Sensor Diagram name Activation...

  • Page 73: The Digital Controller: Euw5-24Kzw1 And Euwl5-24Kzw1

    ESIE-0303 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 Part 2 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 What Is in This Chapter? Introduction This chapter contains information on the digital controller of EUW5-24KZW1 and EUWL5-24KZW1. Overview This chapter contains the following topics: Topic See page 2.2–The Digital Controller...

  • Page 74: The Digital Controller

    The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 ESIE-0303 The Digital Controller Digital controller The EUW5-24KZW1 and EUWL5-24KZW1 units are equipped with a digital controller offering a user-friendly way to configure, use and maintain the unit. The digital controller consists of: ■ A numeric display ■...
  • Page 75 ESIE-0303 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 Function ■ The key is copied into the unit EEPROM after pressing both keys and then powering the unit : The initialisation key can be bought as a spare part. There is one type for all micro controllers. You have to program it yourself by configuring the settings you want on a micro controller, and then copying these settings into the key.

  • Page 76: Start/Stop

    The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 ESIE-0303 Start/Stop At power ON When the power is ON, the display shows the inlet water temperature. ■ Start/stop Press for 5 s to start or stop in cooling mode. ■ Press for 5 s to start or stop in heating mode. Remote start/stop, The procedure to start or stop the unit depends on the setting of the remote start/stop.
  • Page 77 ESIE-0303 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 When you switch When you switch the unit ON, the following happens: the unit ON Stage Description ■ LED starts flashing, indicating that the initialization cycle is started. ■ LED or the LED lights up, indicating whether the cooling or the heating mode is selected.

  • Page 78: What Happens In Case Of An Alarm Or A Warning

    The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 ESIE-0303 What Happens in Case of an Alarm or a Warning Alarms and The table below describes two types of safety devices: warnings Item Alarm Warning Function Protects the unit. Gives additional service information. Description ■...

  • Page 79: Settings: Direct And User Parameters

    ESIE-0303 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 Settings: Direct and User Parameters Direct and user The table below describes the direct and user parameters. parameters Parameters Description Example Direct Are used for the daily usage of ■ To set the cooling temperature set point. the unit.
  • Page 80 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 ESIE-0303 Default Value Step Code Description Type Limit values value EUW5-24KZW1 and EUWL5-24KZW1 Activation period of the buzzer User 1 min ■ 0 min: 1 min buzzer disabled ■ 1-14 min: buzzer activation period ■...

  • Page 81: Reading Or Adjusting Parameter Settings: The Programming Procedure

    ESIE-0303 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 Reading or Adjusting Parameter Settings: the Programming Procedure Introduction ■ When no buttons are pressed for 5 s, the display starts flashing. ■ You can exit at every step by leaving the buttons untouched for 1 min. The modifications are not saved.
  • Page 82 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 ESIE-0303 2–20 Part 2 – Functional Description...

  • Page 83: Troubleshooting

    ESIE-0303 Part 3 Troubleshooting Introduction EAW(L)5-24KZW1 units are equipped with a digital controller. These digital controllers use the information gained from the input signals to control the output signals. If the unit is not performing properly, first check the input devices, then the digital controllers and finally the output devices. What is in this part? This part contains the following chapters: Chapter...
  • Page 84 ESIE-0303 3–2 Part 3 – Troubleshooting...

  • Page 85: Inputs And Outputs Overview

    ESIE-0303 Inputs and Outputs Overview Part 3 Inputs and Outputs Overview What Is in This Chapter? Introduction The first step in a troubleshooting procedure is to check the inputs and outputs. This chapter contains an overview of the inputs and outputs. Overview This chapter contains the following topics Topic...

  • Page 86: Pcb Layout Of The Euw5-24Kzw1 And Euwl5-24Kzw1

    Inputs and Outputs Overview ESIE-0303 Inputs and Outputs Overview: EUW5-24KZW1 and EUWL5-24KZW1 Inputs/outputs The table below describes the relation between the wiring diagram symbols, the wiring connections and the error codes. For the exact location, see: ■ "PCB Layout of the EUW5-24KZW1 and EUWL5-24KZW1" on page 1–49 ■...
  • Page 87 ESIE-0303 Inputs and Outputs Overview Part 3 – Troubleshooting 3–5...
  • Page 88 Inputs and Outputs Overview ESIE-0303 3–6 Part 3 – Troubleshooting...

  • Page 89: What Is In This Chapter

    ESIE-0303 Malfunction Indications and Safeties Overview Part 3 Malfunction Indications and Safeties Overview What Is in This Chapter? Introduction The malfunction indication on the digital controller display helps you to find the cause of the problem. This chapter describes the malfunction indications and the safeties. Overview This chapter contains the following topics: Topic...
  • Page 90 Malfunction Indications and Safeties Overview ESIE-0303 Malfunction Indications Overview Alarm and warning The following alarm and warning codes can appear on the screen: codes Alarm or Code Description Reset See page warning The anti-freeze alarm has been activated. Alarm Manual 2–16 NTC probe used to measure the evaporator inlet water temperature is Alarm...
  • Page 91 ESIE-0303 Malfunction Indications and Safeties Overview ■ What to do in the In the event of automatic reset, the system restarts automatically. event of an alarm ■ In the event of manual reset, proceed as follows: Step Action Result The buzzer stops. Press Find the cause of the alarm and correct it.
  • Page 92 Malfunction Indications and Safeties Overview ESIE-0303 Safeties Overview Safety devices The table below contains an overview of the safety devices. Alarm Alarm Activation Reset Wiring code Device description indication Flow switch or No flow for 5 s or no sufficient flow Manual software S10L, S11L Contact closed...
  • Page 93 ESIE-0303 Malfunction Indications and Safeties Overview Alarm indicators on The table below describes the alarm indicators on the I/O PCB. I/O PCB Symbol Indication Green LED ■ Blinking = CPU OK ■ Not blinking = CPU NOK Red LED Red LED Alarm indications The table below describes the alarm indications on the I/O PCB.
  • Page 94 Malfunction Indications and Safeties Overview ESIE-0303 3–12 Part 3 – Troubleshooting...

  • Page 95: What Is In This Chapter

    ESIE-0303 Checking the Inputs and Outputs Part 3 Checking the Inputs and Outputs What is in This Chapter? Introduction This chapter contains information on how to measure and check the most important inputs and outputs. Overview This chapter contains the following topics: Topic See page 3.2–Checking the Temperature Sensors...
  • Page 96 Checking the Inputs and Outputs ESIE-0303 Checking the Temperature Sensors Introduction If the cause of the problem is related to the temperature sensors, the sensors should be checked prior to changing the controller or an output device. Temperature The following sensors are connected to the controller: R3T/ R4T/ R5T. sensors How to check To check the temperature sensors, proceed as follows:...
  • Page 97 ESIE-0303 Checking the Inputs and Outputs Controller Sensors: R3T, R4T and R5T Temp.-resistance The table below contains the temperature resistance values of the controller sensors. Resistance (kΩ) Resistance (kΩ) Resistance (kΩ) Temp. Temp. Temp. (°C) (°C) (°C) Maximum Standard Minimum Maximum Standard Minimum...
  • Page 98 Checking the Inputs and Outputs ESIE-0303 Checking the Digital Inputs and Outputs Troubleshooting In most cases a malfunction occurs in the unit itself and not in the control circuit of the unit. However, if a malfunction does occur in the control circuit, measure the relevant signals using the schematic input route shown below.
  • Page 99 ESIE-0303 Checking the Inputs and Outputs Checking the Power Supply and Fuses Overview The table below contains an overview of the circuits, the voltage and their fuse codes. Circuit Wiring code Type / voltage Fuse code Main supply L1 + L2 + L3 + N 3 phases / 400 V AC F1U+F2U+F3U Control circuit (PCBs)
  • Page 100 Checking the Inputs and Outputs ESIE-0303 3–18 Part 3 – Troubleshooting...

  • Page 101: Troubleshooting

    ESIE-0303 Troubleshooting Part 3 Troubleshooting What Is in This Chapter? Introduction When a problem occurs, you have to check all possible malfunctions. This chapter gives a general idea of where to look for malfunctions. Furthermore, the general procedures for refrigeration circuit and electrical circuit repair are described. Not all repair procedures are described.

  • Page 102: Items To Be Checked

    Troubleshooting ESIE-0303 Items to Be Checked Introduction The tables below contain the most frequent failures and their corresponding corrective action: ■ In case the unit does not start and there is no malfunction indication. ■ In case the unit does not start and there is a malfunction indication. No malfunction The unit does not start and there is no malfunction indication: indication...
  • Page 103 ESIE-0303 Troubleshooting Malfunction Possible causes Items to be checked High-pressure ■ Defective condenser fan ■ Operation condition switch operation in cooling outdoor air temp. < 43°C ■ Dirty or blocked condenser ■ State of the condenser (clean) ■ Operation out of range ■...

  • Page 104: General Repair Procedures

    Carry out the repair according to the normal procedure. There are no special procedures for the replacement of refrigeration parts.See the general Daikin air-conditioning service manual for more information on the standard practice of refrigeration works. Pressurize the system. Make sure there are no leaks.

  • Page 105: Unlocking The Keyboard

    ESIE-0303 Troubleshooting Unlocking the Keyboard Locked keyboard If the keyboard is locked, it is no longer possible to manipulate the controller. When the unit is OFF, it stays OFF. When the unit is ON, it stays ON. Unlock the To unlock the keyboard according to method 1, proceed as follows: keyboard (method 1) Step...

  • Page 106: Replacing The Controller

    Troubleshooting ESIE-0303 Replacing the Controller Replacing the To replace the controller, proceed as follows: controller Step Action Remove the connections of the old controller. Remove the old controller. Install the new controller in the same way as the old controller. Reconnect the controller.
  • Page 107 ESIE-0303 Troubleshooting Loading To load parameters when you have entered the factory menu, proceed as follows: parameters Step Action Result — Scroll using to go to parameter HC. Press Scroll using to change the value to 01. You see parameter HC. Press You can start initialization.
  • Page 108 Troubleshooting ESIE-0303 Regulator The table below contains the settings of the regulator. EUW5- EUW16- 12KZW1 24KZW1 Read/ Code Parameter Function write EUWL5- EUWL16- 12KZW1 24KZW1 Direct Cooling set point 12°C 12°C Direct Cooling hysteresis 3°C 3°C Direct Heating setpoint 30°C 30°C Direct Heating hysteresis...
  • Page 109 ESIE-0303 Troubleshooting Fans The table below contains the settings of the fans. Read/ Code Parameter Function EUW(L)5-24KZW1 write Factory Are there any fans? Anti-freeze and The table below contains the settings of the anti-freeze and the supporting heaters. supporting heaters EUW5-24KZW1 Read/ Code...
  • Page 110 Troubleshooting ESIE-0303 Others The table below contains the other settings. EUW5-24KZW1 Read/ Code Parameter Function EUWL5-24KZW1 write Factory Unit type Factory Pump func. logic User Cooling/heating input User ON/OFF input User Number of terminals User Keyboard lock-up User Serial address User Remote control password Factory...

  • Page 111: Replacing The Pcb: Euw5-24Kzw1 And Euwl5-24Kzw1

    ESIE-0303 Troubleshooting Replacing the PCB: EUW5-24KZW1 and EUWL5-24KZW1 Replacing the PCB To replace the PCB, proceed as follows: Step Action Switch off the power. Remove the connections of the old PCB. Remove the old PCB. Place the new PCB in the same way as the old PCB. Reconnect the PCB.
  • Page 112 Troubleshooting ESIE-0303 3–30 Part 3 – Troubleshooting...
  • Page 113 ESIE-0303 Part 4 Commissioning and Test Introduction Commissioning and test run are well known practices in service engineering. This part contains a systematic approach on test run checks and test values, which guarantees a high quality installation and operation of the units. What is in this part? This part contains the following chapters: Chapter...
  • Page 114 ESIE-0303 4–2 Part 4 – Commissioning and Test Run...

  • Page 115: What Is In This Chapter

    ESIE-0303 Pre-Test Run Checks Part 4 Pre-Test Run Checks What Is in This Chapter? Introduction This chapter contains checks you have to carry out before every test run. Overview This chapter contains the following topics: Topic See page 1.2–General Checks 4–4 1.3–Water Piping Checks 4–5...

  • Page 116: General Checks

    Pre-Test Run Checks ESIE-0303 General Checks Checklist The table below contains the general checklist. Step Check whether... There is external damage. The unit is properly supported and/or has a proper foundation. The unit is installed horizontally with a deviation of maximum 1°. Anti-vibration pads are required.

  • Page 117: Water Piping Checks

    ESIE-0303 Pre-Test Run Checks Water Piping Checks Checklist The table below contains the water piping checklist. Step Check whether... A filter is installed in front of the water inlet of the plate-heat exchanger. The plate-heat exchangers are sensitive to dirt and small particles. The water volume is within the limits.
  • Page 118 Pre-Test Run Checks ESIE-0303 Evaporator Condenser Minimum water Minimum water Maximum water Minimum water Maximum water Chiller type volume flow flow flow flow EUWL24KZW1 311 l 89 l/min 358 l/min The water pressure should not exceed the maximum working pressure of 10 bar. Calculation of the The calculation method below is based on the fact that the water volume in a chiller should be large minimum water...
  • Page 119 ESIE-0303 Pre-Test Run Checks Water quality The table below contains the required water quality specifications. Tendency if out of Evaporator water Heated water (low temperature) criteria Circulating Supply water Circulating water Supply water water (< 20°C) (20°C-60°C) Items to be checked at 25°C 6.8~8.0 6.8~8.0...

  • Page 120: Water Pressure Drop: Euw5-12Kzw1

    Pre-Test Run Checks ESIE-0303 Water Pressure Drop: EUW5-12KZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUW5-12KZW1. drop evaporator 10hp 12hp Water flow rate (l/min) Water pressure The illustration below shows the water pressure drop through condenser for EUW5-12KZW1. drop condenser 12hp 10hp...

  • Page 121: Water Pressure Drop: Euw16-24Kzw1

    ESIE-0303 Pre-Test Run Checks Water Pressure Drop: EUW16-24KZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUW16-24KZW1. drop evaporator 20hp 24hp 16hp Water flow rate (l/min) Water pressure The illustration below shows the water pressure drop through condenser for EUW16-24KZW1. drop condenser 24hp 20hp...

  • Page 122: Water Pressure Drop: Euwl5-24Kzw1

    Pre-Test Run Checks ESIE-0303 Water Pressure Drop: EUWL5-24KZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUWL5-12KZW1. drop evaporator for EUWL5-12KZW1 12hp 10hp Water flow rate (l/min) Water pressure The illustration below shows the water pressure drop through evaporator for EUWL16-24KZW1. drop evaporator for EUWL16-24KZW1 24hp...
  • Page 123 ESIE-0303 Pre-Test Run Checks Warning Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange. See "Technical Specifications: EUWL5-10KZW1" on page 1–10 , "Technical Specifications: EUWL12-20KZW1" on page 1–12 and "Technical Specifications: EUWL24KZW1"...

  • Page 124: Setting Of The Flow Switch

    Pre-Test Run Checks ESIE-0303 Setting of the Flow Switch Functional The flow switch protects the evaporator against freezing. It shuts down the unit when the flow of the description unit becomes lower than the minimum allowable flow of the unit. For units with leaving water applications lower than 5°C, the setting has to be done after installation.
  • Page 125 ESIE-0303 Pre-Test Run Checks Setting the flow The table below describes how to set the flow switch. switch Step Action Set the water flow to the correct value as specified in "Flow values" on page 4–12. Remove the protective screw cap on the front of the flow switch. Adjust the potentiometer so that the red LED turns on.

  • Page 126: Electrical Checks

    Pre-Test Run Checks ESIE-0303 Electrical Checks Checklist The table below contains the electrical checklist. Step Check whether... The main fuses, earth leak detector and main isolator are installed. The main power supply voltage deviates less than 10% from the nominal value. The flow switch and pump contact are properly wired.
  • Page 127 ESIE-0303 Test Run and Operation Data Part 4 Test Run and Operation Data What Is in This Chapter? Introduction The table in this chapter contains an overview of the currents and used fuses. Overview This chapter contains the following topics: Topic See page 2.2–Currents and Used Fuses...
  • Page 128 Test Run and Operation Data ESIE-0303 Currents and Used Fuses Currents The table below contains the currents and used fuses. Unit Nominal current Maximum current Fuses EUW5KZW1 6.6 A 13 A 3 x 16 gL/gG EUW8KZW1 10.4 A 19 A 3 x 20 gL/gG EUW10KZW1 13.1 A...
  • Page 129 Preventive maintenance should be set up for operation at maximum capacity or to avoid damage. The following chapters explain how to or when to maintain the EUW5-24KZW1 and EUWL5-24KZW1. It is also applicable on other types of Daikin chillers. What is in this part?
  • Page 130 ESIE-0303 5–2 Part 5 – Maintenance...
  • Page 131 ESIE-0303 Maintenance Part 5 Maintenance What Is in This Chapter Introduction As shown in the table below, we have grouped the maintenance in maintenance of the main parts (condenser, compressor and evaporator) and periodical checks. Precautions Correct choices and decisions have to be made before any maintenance is done. Opening the refrigerant circuit may cause a loss of refrigerant or lead to system contamination.
  • Page 132 Maintenance ESIE-0303 Maintenance of the Main Parts Preventive A program of scheduled maintenance should be set up and followed. The items mentioned are to be maintenance used as a guide and must be used in combination with sound electrical and refrigeration workmanship to ensure trouble free operation and performance.
  • Page 133 ESIE-0303 Maintenance Expansion valve The expansion valve will allow the correct amount of refrigerant to enter the evaporator to match the cooling load (by keeping a constant superheat). Follow the instructions below to check the expansion valve. ■ Check the superheat setting. ■...
  • Page 134 Maintenance ESIE-0303 Maintenance of the Control Devices Preventive A program of scheduled maintenance should be set up and followed. The items mentioned are to be maintenance used as a guide and must be used in combination with sound electrical and refrigeration workmanship to ensure trouble free operation and performance.
  • Page 135 ESIE-0303 Maintenance Periodical Checks Electrical checks The table below contains the electrical checks. Inspection checks and actions Remarks Check that all electrical wiring is properly — connected and securely tightened. Check the electrical components for damage or loss. — Check if the power supply corresponds with the —...
  • Page 136 Maintenance ESIE-0303 Noise checks The table below contains the noise checks. Inspection checks and actions Remarks Check for any abnormal noise. — ■ Locate the noise producing section and search the cause. ■ If the cause of the noise cannot be located, contact your dealer.
  • Page 137 ESIE-0303 Index 3–16 Checking the Digital Inputs and Outputs ..........3–17 Checking the Power Supply and Fuses .
  • Page 138 ESIE-0303 Operational Range 2–4 EUW5-24KZW1 ............. . . 2–5 EUWL5-24KZW1 .
  • Page 139 ESIE-0303 1–53 Wiring Diagram ..............Index...
  • Page 140 ESIE-0303 Index...

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