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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 ..........
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...
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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..........
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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 ..................
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.
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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...
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...
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...
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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 ■...
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...
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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 ■...
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...
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...
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.
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...
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...
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.
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...
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ESIE-0303 General Outline Component Component Evaporator entering water Flow switch pipe temperature sensor Freeze-up sensor Part 1 – System Outline 1–23...
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...
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ESIE-0303 General Outline Component Component Evaporator entering water Flow switch pipe temperature sensor Freeze-up sensor Part 1 – System Outline 1–25...
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.
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...
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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...
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...
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...
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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...
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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.
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...
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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...
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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.
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...
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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...
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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.
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...
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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...
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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.
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Piping Layout ESIE-0303 1–42 Part 1 – System Outline...
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...
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...
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...
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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...
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...
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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 &...
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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...
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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...
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.
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ESIE-0303 2–2 Part 2 – Functional Description...
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...
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...
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...
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...
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...
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...
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.
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...
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...
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 ■...
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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.
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.
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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.
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 ■...
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.
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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 ■...
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.
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The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1 ESIE-0303 2–20 Part 2 – Functional Description...
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...
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...
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 ■...
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ESIE-0303 Inputs and Outputs Overview Part 3 – Troubleshooting 3–5...
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Inputs and Outputs Overview ESIE-0303 3–6 Part 3 – Troubleshooting...
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...
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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...
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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.
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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...
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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.
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Malfunction Indications and Safeties Overview ESIE-0303 3–12 Part 3 – Troubleshooting...
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...
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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:...
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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...
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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.
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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)
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Checking the Inputs and Outputs ESIE-0303 3–18 Part 3 – 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.
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...
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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 ■...
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.
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...
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.
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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.
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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...
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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...
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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...
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.
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Troubleshooting ESIE-0303 3–30 Part 3 – Troubleshooting...
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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...
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ESIE-0303 4–2 Part 4 – Commissioning and Test Run...
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...
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.
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.
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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...
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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...
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...
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...
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...
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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"...
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.
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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.
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.
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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...
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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...
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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?
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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.
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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.
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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. ■...
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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.
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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 —...
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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.
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ESIE-0303 Index 3–16 Checking the Digital Inputs and Outputs ..........3–17 Checking the Power Supply and Fuses .
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