Daikin EUWL KZW1 Series User manual

ESIE-0303
Table of Contents i
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Table of Contents
1Introduction
1.1 About This Manual .................................................................................. i–v
Part 1
System Outline
1 General Outline
1.1 What Is in This Chapter? ........................................................................ 1–3
1.2 Technical Specifications: EUW5-10KZW1 .............................................. 1–4
1.3 Technical Specifications: EUW12-20KZW1............................................ 1–6
1.4 Technical Specifications: EUW24KZW1 ................................................. 1–8
1.5 Technical Specifications: EUWL5-10KZW1............................................ 1–10
1.6 Technical Specifications: EUWL12-20KZW1.......................................... 1–12
1.7 Technical Specifications: EUWL24KZW1 ............................................... 1–14
1.8 Electrical Specifications: EUW5-10KZW1............................................... 1–16
1.9 Electrical Specifications: EUW12-20KZW1............................................. 1–17
1.10 Electrical Specifications: EUW24KZW1.................................................. 1–18
1.11 Electrical Specifications: EUWL5-10KZW1............................................. 1–19
1.12 Electrical Specifications: EUWL12-20KZW1........................................... 1–20
1.13 Electrical Specifications: EUWL24KZW1................................................ 1–21
1.14 Outlook Drawing: EUW5-8-10-12KZW1 ................................................. 1–22
1.15 Outlook Drawing: EUW16-20-24KZW1................................................... 1–24
1.16 Outlook Drawing: EUWL5-8-10-12KZW1 ............................................... 1–26
1.17 Outlook Drawing: EUWL16-20-24KZW1................................................. 1–27
2 Piping Layout
2.1 What Is in This Chapter? ........................................................................ 1–29
2.2 Functional Diagram Refrigeration and Water Circuit:
EUW5-8-10-12KZW1 .............................................................................. 1–30
2.3 Functional Diagram Refrigeration and Water Circuit:
EUW16-20-24KZW1 ............................................................................... 1–33
2.4 Functional Diagram Refrigeration and Water Circuit:
EUWL5-8-10-12KZW1 ............................................................................ 1–36
2.5 Functional Diagram Refrigeration and Water Circuit:
EUWL16-20-24KZW1 ............................................................................. 1–39

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3 Wiring Layout
3.1 What Is in This Chapter? ......................................................................... 1–43
3.2 Main Functions of the EUW5-24KZW1 and EUWL5-24KZW1 ................ 1–44
3.3 Switch Box Layout: EUW5-12KZW1........................................................ 1–45
3.4 Switch Box Layout: EUW16-24KZW1...................................................... 1–47
3.5 PCB Layout of the EUW5-24KZW1 and EUWL5-24KZW1...................... 1–49
3.6 Wiring Diagram ........................................................................................ 1–53
Part 2
Functional Description
1 Functional Description
1.1 What Is in This Chapter? ......................................................................... 2–3
1.2 Operational Range: EUW5-24KZW1 ....................................................... 2–4
1.3 Operational Range: EUWL5-24KZW1 ..................................................... 2–5
1.4 Compressor Working Status.................................................................... 2–6
1.5 Compressor Timers ................................................................................. 2–7
1.6 Thermostat Control: EUW5-24KZW1 and EUWL5-24KZW1 ................... 2–8
1.7 Pump Steering ......................................................................................... 2–9
1.8 Freeze-up Control.................................................................................... 2–10
2 The Digital Controller: EUW5-24KZW1 and EUWL5-24KZW1
2.1 What Is in This Chapter? ......................................................................... 2–11
2.2 The Digital Controller ............................................................................... 2–12
2.3 Start/Stop................................................................................................. 2–14
2.4 What Happens in Case of an Alarm or a Warning................................... 2–16
2.5 Settings: Direct and User Parameters ..................................................... 2–17
2.6 Reading or Adjusting Parameter Settings: the Programming Procedure 2–19
Part 3
Troubleshooting
1 Inputs and Outputs Overview
1.1 What Is in This Chapter? ......................................................................... 3–3
1.2 Inputs and Outputs Overview: EUW5-24KZW1 and EUWL5-24KZW1 ... 3–4

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2 Malfunction Indications and Safeties Overview
2.1 What Is in This Chapter? ........................................................................ 3–7
2.2 Malfunction Indications Overview ........................................................... 3–8
2.3 Safeties Overview ................................................................................... 3–10
3 Checking the Inputs and Outputs
3.1 What is in This Chapter?......................................................................... 3–13
3.2 Checking the Temperature Sensors ....................................................... 3–14
3.3 Controller Sensors: R3T, R4T and R5T.................................................. 3–15
3.4 Checking the Digital Inputs and Outputs................................................. 3–16
3.5 Checking the Power Supply and Fuses .................................................. 3–17
4 Troubleshooting
4.1 What Is in This Chapter? ........................................................................ 3–19
4.2 Items to Be Checked............................................................................... 3–20
4.3 General Repair Procedures .................................................................... 3–22
4.4 Unlocking the Keyboard.......................................................................... 3–23
4.5 Replacing the Controller ......................................................................... 3–24
4.6 Replacing the PCB: EUW5-24KZW1 and EUWL5-24KZW1................... 3–29
Part 4
Commissioning and Test Run
1 Pre-Test Run Checks
1.1 What Is in This Chapter? ........................................................................ 4–3
1.2 General Checks ...................................................................................... 4–4
1.3 Water Piping Checks .............................................................................. 4–5
1.4 Water Pressure Drop: EUW5-12KZW1................................................... 4–8
1.5 Water Pressure Drop: EUW16-24KZW1................................................. 4–9
1.6 Water Pressure Drop: EUWL5-24KZW1................................................. 4–10
1.7 Setting of the Flow Switch....................................................................... 4–12
1.8 Electrical Checks .................................................................................... 4–14

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2 Test Run and Operation Data
2.1 What Is in This Chapter? ......................................................................... 4–15
2.2 Currents and Used Fuses........................................................................ 4–16
Part 5
Maintenance
1 Maintenance
1.1 What Is in This Chapter ........................................................................... 5–3
1.2 Maintenance of the Main Parts ................................................................ 5–4
1.3 Maintenance of the Control Devices........................................................ 5–6
1.4 Periodical Checks .................................................................................... 5–7

ESIE-0303 Introduction
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Part 0
1 Introduction
1.1 About This Manual
Target group This service manual is intended for and should only be used by qualified engineers.
Purpose of this
manual
This service manual contains all the information you need to carry out the necessary repair and
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.
■Are available in seven standard sizes with nominal cooling capacities ranging from 13 kW to
65 kW.
EUWL5-24KZW1 The Daikin EUWL5-24KZ water/air-cooled water chillers:
■Are designed for indoor installation.
■Are used for cooling and heating applications.
■Are available in seven standard sizes with nominal cooling capacities ranging from 12.1 kW to
62.4 kW.
Before starting up
the unit
Before starting up the unit for the first time, make sure it has been properly installed. See "Pre-Test
Run Checks" on page 4–3.

Introduction ESIE-0303
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ESIE-0303
Part 1 – System Outline 1–1
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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
1–2 Part 1 – System Outline
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