Daikin EUWY 24KBZW1 Series User manual

ESIE11-02
Service Manual
EUWA*5-24KBZW1 R-407C
EUWY*5-24KBZW1 R-407C
Small air-cooled chillers and heat pump

ESIE11-02
Table of Contents i
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4
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1
Table of Contents
1Introduction
1.1 About This Manual .................................................................................. i–vii
Part 1
System Outline
1 General Outline
1.1 What Is in This Chapter? ........................................................................ 1–3
1.2 Technical Specifications: EUWA*5-8KBZW1.......................................... 1–5
1.3 Technical Specifications: EUWA*10-12KBZW1...................................... 1–8
1.4 Technical Specifications: EUWA*16-20KBZW1...................................... 1–11
1.5 Technical Specifications: EUWA*24KBZW1........................................... 1–14
1.6 Technical Specifications: EUWY*5-8KBZW1.......................................... 1–17
1.7 Technical Specifications: EUWY*10-12KBZW1...................................... 1–20
1.8 Technical Specifications: EUWY*16-20KBZW1...................................... 1–23
1.9 Technical Specifications: EUWY*24KBZW1........................................... 1–26
1.10 Correction factors for glycol .................................................................... 1–29
1.11 Electrical Specifications: EUWA*5-8KBZW1........................................... 1–31
1.12 Electrical Specifications: EUWA*10-12KBZW1....................................... 1–33
1.13 Electrical Specifications: EUWA*16-20KBZW1....................................... 1–35
1.14 Electrical Specifications: EUWA*24KBZW1............................................ 1–37
1.15 Electrical Specifications: EUWY*5-8KBZW1........................................... 1–39
1.16 Electrical Specifications: EUWY*10-12KBZW1....................................... 1–41
1.17 Electrical Specifications: EUWY*16-20KBZW1....................................... 1–43
1.18 Electrical Specifications: EUWY*24KBZW1............................................ 1–45
1.19 Outlook Drawing: EUWAN5-8KBZW1/EUWYN5-8KBZW1..................... 1–47
1.20 Outlook Drawing: EUWAP5-8KBZW1/EUWYP5-8KBZW1..................... 1–48
1.21 Outlook Drawing: EUWAB5-8KBZW1/EUWYB5-8KBZW1..................... 1–49
1.22 Outlook Drawing: EUWAN10-12KBZW1/EUWYN10-12KBZW1............. 1–50
1.23 Outlook Drawing: EUWAP10-12KBZW1/EUWYP10-12KBZW1............. 1–51
1.24 Outlook Drawing: EUWAB10-12KBZW1/EUWYB10-12KBZW1............. 1–52
1.25 Outlook Drawing: EUWAN16KBZW1/EUWYN16KBZW1....................... 1–53
1.26 Outlook Drawing: EUWAP16KBZW1/EUWYP16KBZW1 ....................... 1–54
1.27 Outlook Drawing: EUWAB16KBZW1/EUWAB16KBZW1 ....................... 1–55
1.28 Outlook Drawing: EUWAN20-24KBZW1/EUWYN20-24KBZW1............. 1–56
1.29 Outlook Drawing: EUWAP20-24KBZW1/EUWYP20-24KBZW1............. 1–57
1.30 Outlook Drawing: EUWAB20-24KBZW1/EUWYB20-24KBZW1............. 1–58
2 Piping Layout
2.1 What Is in This Chapter? ........................................................................ 1–59
2.2 Installation outline ................................................................................... 1–60
2.3 Functional Diagram Refrigeration Circuit: EUWA*5-24KBZW1 .............. 1–61
2.4 Functional Diagram Refrigeration Circuit: EUWY*5-24KBZW1 .............. 1–64

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3 Wiring Layout
3.1 What Is in This Chapter? ......................................................................... 1–67
3.2 Main Functions of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1...... 1–68
3.3 Switch Box Layout: EUWA*5-24KBZW1 and EUWY*5-24KBZW1.......... 1–69
3.4 PCB Layout of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ........... 1–71
3.5 Wiring Diagram: EUWA*5-24KBZW1 and EUWY*5-24KBZW1............... 1–75
Part 2
Functional Description
1 Functional Description
1.1 What Is in This Chapter? ......................................................................... 2–3
1.2 Operational Range: EUWA*5-24KBZW1 ................................................. 2–4
1.3 Operational Range: EUWY*5-24KBZW1 ................................................. 2–5
1.4 Operational Flow Chart............................................................................ 2–7
1.5 Compressor Working Status.................................................................... 2–8
1.6 Compressor Timers ................................................................................. 2–9
1.7 Thermostat Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1......... 2–10
1.8 Head Pressure Control: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................. 2–11
1.9 Fan Working: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ................... 2–13
1.10 Crankcase Heater.................................................................................... 2–14
1.11 Evaporator Heater Tape Management: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................. 2–15
1.12 Pump Steering ......................................................................................... 2–16
1.13 Freeze-up Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 .......... 2–17
1.14 Defrost Management for EUWY*5-24KBZW1 ......................................... 2–18
1.15 Changeable Digital Inputs........................................................................ 2–24

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1
2 The Digital Controller
2.1 What Is in This Chapter? ........................................................................ 2–25
2.2 The Digital Controller .............................................................................. 2–26
2.3 Start/Stop ................................................................................................ 2–29
2.4 What Happens in Case of an Alarm or a Warning .................................. 2–31
2.5 Settings: Direct and User Parameters .................................................... 2–32
2.6 Reading or Adjusting Parameter Settings: the Programming
Procedure ............................................................................................... 2–36
2.7 Menu Overview ....................................................................................... 2–38
2.8 Option EKAC10C Address Card ............................................................. 2–39
2.9 Option EKRUMCA Remote Controller .................................................... 2–40
Part 3
Troubleshooting
1 Inputs and Outputs Overview
1.1 What Is in This Chapter? ........................................................................ 3–3
1.2 Inputs and Outputs Overview: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–4
1.3 Inputs/outputs overview of the I/O PCB: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–5
2 Malfunction Indications and Safeties Overview
2.1 What Is in This Chapter? ........................................................................ 3–7
2.2 Malfunction Indications Overview: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–8
2.3 Safeties Overview: EUWA*5-24KBZW1 and EUWY*5-24KBZW1.......... 3–11
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 I/O PCB sensors: R3T and R4T for EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–15
3.4 I/O PCB sensors: R6T, R7T and R8T for EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–16
3.5 Checking the Digital Inputs and Outputs................................................. 3–17
3.6 Checking the Power Supply and Fuses: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–18
3.7 Electrical Error Overview: EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 3–20

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4 Troubleshooting
4.1 What Is in This Chapter? ......................................................................... 3–23
4.2 Items to Be Checked ............................................................................... 3–24
4.3 General Repair Procedures ..................................................................... 3–26
4.4 Locking and Unlocking the Keyboard ...................................................... 3–27
4.5 Replacing the Controller: EUWA*5-24KBZW1......................................... 3–28
4.6 Replacing the Controller: EUWY*5-24KBZW1......................................... 3–30
4.7 Parameter and Parameter Level Overview.............................................. 3–32
4.8 Replacing the PCB: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ......... 3–37
4.9 Soft Starter (option EKSS) Thermal Protection........................................ 3–38
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 External Static Pressure: EUWA*5-24KBZW1......................................... 4–8
1.5 External Static Pressure: EUWY*5-24KBZW1......................................... 4–10
1.6 Static Pressure of the Pump for EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................. 4–12
1.7 Water Pressure Drop through Evaporator: EUWA*5-12KBZW1.............. 4–14
1.8 Water Pressure Drop through Evaporator: EUWA*16-24KBZW1............ 4–16
1.9 Water Pressure Drop through Evaporator: EUWY*5-12KBZW1.............. 4–18
1.10 Water Pressure Drop through Evaporator: EUWY*16-24KBZW1............ 4–20
1.11 Electrical Checks ..................................................................................... 4–22
1.12 Control of the function of the 4-way valve for EUWY*5-24KBZW1.......... 4–23

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2 Test Run and Operation Data
2.1 What Is in This Chapter? ........................................................................ 4–29
2.2 Test Run and Operation Data for EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 ................................................................................ 4–30
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

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ESIE11-02 Introduction
vii
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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 EUWA*5-24KBZW1 and EUWY*5-24KBZW1.
EUWA*5-24KBZW1 The Daikin EUWA*5-24KBZW1 air-cooled water chillers:
■Are designed for outdoor installation.
■Are used for cooling applications.
■Are available in seven standard sizes with nominal cooling capacities ranging from 11.3 kW to
55.3 kW.
■have three types of units:
EUWAN5-24KBZW1 = without hydraulic module, naked model
EUWAP5-24KBZW1 = with hydraulic module: pump and expansion vessel
EUWAB5-24KBZW1 = with hydraulic module: buffer tank, pump and expansion vessel.
EUWY*5-24KBZW1 The Daikin EUWY*5-24KBZW1 heat pump water chillers:
■Are designed for outdoor installation.
■Are used for cooling and heating applications.
■Are available in seven standard sizes with nominal cooling capacities ranging from 9.1 kW to
50 kW and heating from 11.9 kW to 54 kW.
■have three types of units:
EUWYN5-24KBZW1 = without hydraulic module, naked model
EUWYP5-24KBZW1 = with hydraulic module: pump and expansion vessel
EUWYB5-24KBZW1 = with hydraulic module: buffer tank, pump and expansion vessel.
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 ESIE11-02
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Part 1
System Outline
Introduction This part contains an outline of all the relevant elements in the EUWA*5-24KBZW1 and
EUWY*5-24KBZW1 installation.
What is in this part? This part contains the following chapters:
Chapter See page
1–General Outline 1–3
2–Piping Layout 1–59
3–Wiring Layout 1–67

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1–2 Part 1 – System Outline
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ESIE11-02 General Outline
Part 1 – System Outline 1–3
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Part 1
1 General Outline
1.1 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 See page
1.2–Technical Specifications: EUWA*5-8KBZW1 1–5
1.3–Technical Specifications: EUWA*10-12KBZW1 1–8
1.4–Technical Specifications: EUWA*16-20KBZW1 1–11
1.5–Technical Specifications: EUWA*24KBZW1 1–14
1.6–Technical Specifications: EUWY*5-8KBZW1 1–17
1.7–Technical Specifications: EUWY*10-12KBZW1 1–20
1.8–Technical Specifications: EUWY*16-20KBZW1 1–23
1.9–Technical Specifications: EUWY*24KBZW1 1–26
1.10–Correction factors for glycol 1–29
1.11–Electrical Specifications: EUWA*5-8KBZW1 1–31
1.12–Electrical Specifications: EUWA*10-12KBZW1 1–33
1.13–Electrical Specifications: EUWA*16-20KBZW1 1–35
1.14–Electrical Specifications: EUWA*24KBZW1 1–37
1.15–Electrical Specifications: EUWY*5-8KBZW1 1–39
1.16–Electrical Specifications: EUWY*10-12KBZW1 1–41
1.17–Electrical Specifications: EUWY*16-20KBZW1 1–43
1.18–Electrical Specifications: EUWY*24KBZW1 1–45
1.19–Outlook Drawing: EUWAN5-8KBZW1/EUWYN5-8KBZW1 1–47
1.20–Outlook Drawing: EUWAP5-8KBZW1/EUWYP5-8KBZW1 1–48
1.21–Outlook Drawing: EUWAB5-8KBZW1/EUWYB5-8KBZW1 1–49
1.22–Outlook Drawing: EUWAN10-12KBZW1/EUWYN10-12KBZW1 1–50

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1.23–Outlook Drawing: EUWAP10-12KBZW1/EUWYP10-12KBZW1 1–51
1.24–Outlook Drawing: EUWAB10-12KBZW1/EUWYB10-12KBZW1 1–52
1.25–Outlook Drawing: EUWAN16KBZW1/EUWYN16KBZW1 1–53
1.26–Outlook Drawing: EUWAP16KBZW1/EUWYP16KBZW1 1–54
1.27–Outlook Drawing: EUWAB16KBZW1/EUWAB16KBZW1 1–55
1.28–Outlook Drawing: EUWAN20-24KBZW1/EUWYN20-24KBZW1 1–56
1.29–Outlook Drawing: EUWAP20-24KBZW1/EUWYP20-24KBZW1 1–57
1.30–Outlook Drawing: EUWAB20-24KBZW1/EUWYB20-24KBZW1 1–58
Topic See page

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1.2 Technical Specifications: EUWA*5-8KBZW1
Technical
specifications
The table below contains the technical specifications.
Model EUWAN5KBZW1 EUWAP5KBZW1 EUWAB5KBZW1 EUWAN8KBZW1 EUWAP8KBZW1 EUWAB8KBZW1
Nominal cooling
capacity
11.3 kW 17.9 kW
Nominal input 4.52 kW 4.64 kW 7.38 kW 7.39 kW
Capacity steps 0-100% 0-100%
Compressor
Type Hermetically sealed scroll Hermetically sealed scroll
Speed 2900 rpm 2900 rpm
Crankcase heater 33 W 50 W
No. x model (W1) 1 x JT140BF-YE 1 x JT212DA-YE
Evaporator
Type Brased plate-heat exchanger Brased plate-heat exchanger
No. x model 1 x AC70X-24HX 1 x AC70X-34HX
Min.water volume
in the system (1)
54 l 85 l
Water flow rate Min.: 16 l/min
Max.: 65 l/min
Min.: 26 l/min
Max.: 102 l/min
Nominal water flow 32 l/min 51 l/min
Nom. water
pressure drop
24 kPa 38 kPa
Insulation material Climaflex
Condenser
Type Cross fin coil Hi-X tubes and PE coated waffle louvre fins
Rows x stages x fin
pitch
2x40x2.0mm
Face area 1.570 m²
Nominal air flow 160 m³/min 170 m³/min
Discharge Vertical
Fan type Direct drive
No. of fans 2
No. of motors x
output
2 x 140 kW 1 x 190 kW and 1 x 230 kW
Piping connections
Evap. water
in/outlet
FBSP 1-1/4” FBSP 1-1/4”
Refrigerant circuit
Refrigerant type R-407C
Refrigerant charge 3.9 kg 4.6 kg
Refrigerant control Thermostatic expansion valve
Oil type Idemitsu FVC 68D
Oil charge volume 1.5 l 2.7 l

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(1): The table below contains the minimum water volume settings.
(2): The sound power level is an absolute value that does not depend on the surroundings or the
distance. It cannot be measured in the field (ISO 9614).
No. of circuits 1
Pump
No. x type __ 1 x Horizontal multi-stage end-suction __ 1 x Horizontal multi-stage end-suction
Model __ CM3-3 CM3-3
Nominal static
height pump
__ 239 kPa 198 kPa
Nominal static
height unit
__ 209 kPa 128 kPa
Hydraulic components
Buffer tank __ 55 l __ 55 l
Unitwatervolume 2l 3l 59l 3l 3l 59l
Expansion vessel __ 12 l __ 12 l
Pre-pressure
expansion vessel
1.5 bar 1.5 bar
Safety valve __ 3 bar __ 3 bar
Dimensions
(h x w x d)
1230 x 1290 x 734 mm 1230 x 1290 x 734 mm
Weight
Machine weight 150 kg 168 kg 180 kg 215 kg 229 kg 241 kg
Operation weight 152 kg 171 kg 239 kg 218 kg 232 kg 300 kg
Casing
Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044
Material Polyester coated galvanised steel plate
Sound power
level (2)
67 dBA 76 dBA
Safety devices ■Low-pressure switch
■High-pressure switch
■Pump motor overcurrent
■Discharge temperature control
■Outlet water temperature protection
■Compressor motor overcurrent relay
■Fan thermal protector
■Anti-recycling and guard timer
■Digital display controller with electronic temperature control
■Reverse phase protector
■Flow switch.
Model EUWAN5KBZW1 EUWAP5KBZW1 EUWAB5KBZW1 EUWAN8KBZW1 EUWAP8KBZW1 EUWAB8KBZW1
Setting EUWA*5-8KBZW1
The minimum water volume for standard thermostat difference setting 3 K
For reduced setting multiply this water volume by 3/new setting
Minimum allowable setting 0.1 K

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Nominal conditions The nominal conditions are as follows:
■Entering/leaving evaporator water temperature 12.5/7°C
■Ambient air temperature 35°C
■Power input is total input: Compressor + control circuit + fans + pump.
Operation range The nominal operation range covers a leaving evaporator water temperature from 5°C (-5°C/-10°C for
ZH/ZL option) to 20°C (pull down condition to 25°C).

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1.3 Technical Specifications: EUWA*10-12KBZW1
Technical
specifications
The table below contains the technical specifications.
Model EUWAN10KBZW1 EUWAP10KBZW1 EUWAB10KBZW1 EUWAN12KBZW1 EUWAP12KBZW1 EUWAB12KBZW1
Nominal cooling
capacity
22.5 kW 26.5 kW
Nominal input 8.79 kW 8.74 kW 11.5 kW
Capacity steps 0-100%
Compressor
Type Hermetically sealed scroll
Speed 2900 rpm
Crankcase heater 50 W
No. x model (W1) 1 x JT265DA-YE 1 x JT335DA-YE
Evaporator
Type Brased plate-heat exchanger
No. x model 1 x AC70X-40HX 1 x AC70X-50HX
Min.water volume
in the system (1)
108 l 126 l
Water flow rate Min.: 32 l/min
Max.: 129 l/min
Min.: 38 l/min
Max.: 152 l/min
Nominal water
flow
64 l/min 76 l/min
Nom. water
pressure drop
43 kPa 37 kPa
Insulation material Climaflex
Condenser
Type Cross fin coil Hi-X tubes and PE coated waffle louvre fins
Rows x stages x
fin pitch
2x50x2.0mm
Face area 1.970 m²
Nominal air flow 170 m³/min
Discharge Vertical
Fan type Direct drive
No. of fans 2
No. of motors x
output
1 x 190 kW and 1 x 230 kW 1 x 190 kW and 1 x 230 kW
Piping connections
Evap. water
in/outlet
FBSP 1-1/4”
Refrigerant circuit
Refrigerant type R-407C
Refrigerant
charge
4.6 kg 6.0 kg
Refrigerant control Thermostatic expansion valve

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(1): The table below contains the minimum water volume settings.
Oil type Idemitsu FVC 68D
Oil charge volume 2.7 l
No. of circuits 1
Pump
No. x type __ 1 x Horizontal multi-stage end-suction __ 1 x Horizontal multi-stage end-suction
Model __ CM5-3 __ CM5-3
Nominal static
height pump
__ 232 kPa __ 217 kPa
Nominal static
height unit
__ 138 kPa __ 105 kPa
Hydraulic components
Buffer tank __ 55 l __ 55 l
Unit water volume 3 l 3 l 59 l 3 l 4 l 60 l
Expansion vessel __ 12 l __ 12 l
Pre-pressure
expansion vessel
1.5 bar 1.5 bar
Safety valve __ 3 bar __ 3 bar
Dimensions
(h x w x d)
1450 x 1290 x 734 mm
Weight
Machine weight 245 kg 259 kg 271 kg 248 kg 262 kg 274 kg
Operation weight 248 kg 262 kg 330 kg 251 kg 265 kg 335 kg
Casing
Colour Ivory white / Munsell code 5Y7.5/1 / ± RAL 7044
Material Polyester coated galvanised steel plate
Sound power
level (2)
78 dBA
Safety devices ■Low-pressure switch
■High-pressure switch
■Pump motor overcurrent
■Discharge temperature control
■Outlet water temperature protection
■Compressor motor overcurrent relay
■Fan thermal protector
■Anti-recycling and guard timer
■Digital display controller with electronic temperature control
■Reverse phase protector
■Flow switch.
Model EUWAN10KBZW1 EUWAP10KBZW1 EUWAB10KBZW1 EUWAN12KBZW1 EUWAP12KBZW1 EUWAB12KBZW1
Setting EUWA*10-12KBZW1
The minimum water volume for standard thermostat difference setting 3 K
For reduced setting multiply this water volume by 3/new setting
Minimum allowable setting 0.1 K

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(2): The sound power level is an absolute value that does not depend on the surroundings or the
distance. It cannot be measured in the field (ISO 9614).
Nominal conditions The nominal conditions are as follows:
■Entering/leaving evaporator water temperature 12.5/7°C
■Ambient air temperature 35°C
■Power input is total input: Compressor + control circuit + fans + pump.
Operation range The nominal operation range covers a leaving evaporator water temperature from 5°C (-5°C/-10°C for
ZH/ZL option) to 20°C (pull down condition to 25°C).