Daikin EUWY 24KBZW1 Series Service Manual
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Daikin EUWY 24KBZW1 Series Service Manual

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

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Summary of Contents for Daikin EUWY 24KBZW1 Series

  • Page 1 ESIE11-02 Service Manual EUWA*5-24KBZW1 R-407C EUWY*5-24KBZW1 R-407C Small air-cooled chillers and heat pump...

  • Page 3: Table Of Contents

    ESIE11-02 Table of Contents Introduction About This Manual .................. i–vii Part 1 System Outline General Outline What Is in This Chapter? ................ 1–3 Technical Specifications: EUWA*5-8KBZW1.......... 1–5 Technical Specifications: EUWA*10-12KBZW1........1–8 Technical Specifications: EUWA*16-20KBZW1........1–11 Technical Specifications: EUWA*24KBZW1 ........... 1–14 Technical Specifications: EUWY*5-8KBZW1..........
  • Page 4 ESIE11-02 Wiring Layout What Is in This Chapter? ................. 1–67 Main Functions of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ..1–68 Switch Box Layout: EUWA*5-24KBZW1 and EUWY*5-24KBZW1..1–69 PCB Layout of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ... 1–71 Wiring Diagram: EUWA*5-24KBZW1 and EUWY*5-24KBZW1....1–75 Part 2 Functional Description...
  • Page 5 ESIE11-02 The Digital Controller What Is in This Chapter? ................ 2–25 The Digital Controller ................2–26 Start/Stop ....................2–29 What Happens in Case of an Alarm or a Warning ........2–31 Settings: Direct and User Parameters ............ 2–32 Reading or Adjusting Parameter Settings: the Programming Procedure ....................
  • Page 6 ESIE11-02 Troubleshooting What Is in This Chapter? ................. 3–23 Items to Be Checked ................3–24 General Repair Procedures ..............3–26 Locking and Unlocking the Keyboard ............3–27 Replacing the Controller: EUWA*5-24KBZW1......... 3–28 Replacing the Controller: EUWY*5-24KBZW1......... 3–30 Parameter and Parameter Level Overview..........3–32 Replacing the PCB: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ..
  • Page 7 ESIE11-02 Test Run and Operation Data What Is in This Chapter? ................ 4–29 Test Run and Operation Data for EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ................4–30 Part 5 Maintenance Maintenance What Is in This Chapter ................5–3 Maintenance of the Main Parts ............... 5–4 Maintenance of the Control Devices ............
  • Page 8 ESIE11-02 Table of Contents...
  • Page 9 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.
  • Page 10 Introduction ESIE11-02 viii...
  • Page 11 ESIE11-02 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...
  • Page 12 ESIE11-02 1–2 Part 1 – System Outline...

  • Page 13: General Outline

    ESIE11-02 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. ■...
  • Page 14 General Outline ESIE11-02 Topic See page 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 1–4 Part 1 – System Outline...

  • Page 15: Technical Specifications: Euwa*5-8Kbzw1

    ESIE11-02 General Outline Technical Specifications: EUWA*5-8KBZW1 Technical The table below contains the technical specifications. specifications Model EUWAN5KBZW1 EUWAP5KBZW1 EUWAB5KBZW1 EUWAN8KBZW1 EUWAP8KBZW1 EUWAB8KBZW1 Nominal cooling 11.3 kW 17.9 kW capacity 4.52 kW 4.64 kW 7.38 kW 7.39 kW Nominal input 0-100% 0-100% Capacity steps Compressor...
  • Page 16 General Outline ESIE11-02 Model EUWAN5KBZW1 EUWAP5KBZW1 EUWAB5KBZW1 EUWAN8KBZW1 EUWAP8KBZW1 EUWAB8KBZW1 No. of circuits 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 239 kPa 198 kPa height pump Nominal static 209 kPa 128 kPa height unit...
  • Page 17 ESIE11-02 General Outline 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).

  • Page 18: Technical Specifications: Euwa*10-12Kbzw1

    General Outline ESIE11-02 Technical Specifications: EUWA*10-12KBZW1 Technical The table below contains the technical specifications. specifications Model EUWAN10KBZW1 EUWAP10KBZW1 EUWAB10KBZW1 EUWAN12KBZW1 EUWAP12KBZW1 EUWAB12KBZW1 Nominal cooling 22.5 kW 26.5 kW capacity 8.79 kW 8.74 kW 11.5 kW Nominal input 0-100% Capacity steps Compressor Type Hermetically sealed scroll...
  • Page 19 ESIE11-02 General Outline Model EUWAN10KBZW1 EUWAP10KBZW1 EUWAB10KBZW1 EUWAN12KBZW1 EUWAP12KBZW1 EUWAB12KBZW1 Oil type Idemitsu FVC 68D Oil charge volume 2.7 l No. of circuits 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 232 kPa 217 kPa...
  • Page 20 General Outline ESIE11-02 : 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 ■...

  • Page 21: Technical Specifications: Euwa*16-20Kbzw1

    ESIE11-02 General Outline Technical Specifications: EUWA*16-20KBZW1 Technical The table below contains the technical specifications. specifications Model EUWAN16KBZW1 EUWAP16KBZW1 EUWAB16KBZW1 EUWAN20KBZW1 EUWAP20KBZW1 EUWAB20KBZW1 Nominal cooling 37.0 kW 46.6 kW capacity 15.2 kW 15.0 kW 18.1 kW 17.9 kW Nominal input 0%-50%-100% Capacity steps Compressor Type...
  • Page 22 General Outline ESIE11-02 Model EUWAN16KBZW1 EUWAP16KBZW1 EUWAB16KBZW1 EUWAN20KBZW1 EUWAP20KBZW1 EUWAB20KBZW1 Pump No. x type 1 x Horizontal multi-stage end-suction 1 x Horizontal multi-stage end-suction Model CM10-2 CM10-2 Nominal static 302 kPa 288 kPa height pump Nominal static 240 kPa 195 kPa height unit Hydraulic components Buffer tank...
  • Page 23 ESIE11-02 General Outline 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).

  • Page 24: Technical Specifications: Euwa*24Kbzw1

    General Outline ESIE11-02 Technical Specifications: EUWA*24KBZW1 Technical The table below contains the technical specifications. specifications Model EUWAN24KBZW1 EUWAP24KBZW1 EUWAB24KBZW1 Nominal cooling 55.3 kW capacity 24.0 kW 24.0 kW Nominal input 0%-50%-100% Capacity steps Compressor Type Hermetically sealed scroll Speed 2900 rpm Crankcase heater 50 W No.
  • Page 25 ESIE11-02 General Outline Model EUWAN24KBZW1 EUWAP24KBZW1 EUWAB24KBZW1 Pump No. x type 1 x Horizontal multi-stage end-suction Model CM10-2 Nominal static height 276 kPa pump Nominal static height 158 kPa unit Hydraulic components Buffer tank 55 l Unit water volume 10 l 66 l Expansion vessel 12 l...
  • Page 26 General Outline ESIE11-02 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).

  • Page 27: Technical Specifications: Euwy*5-8Kbzw1

    ESIE11-02 General Outline Technical Specifications: EUWY*5-8KBZW1 Technical The table below contains the technical specifications. specifications Model EUWYN5KBZW1 EUWYP5KBZW1 EUWYB5KBZW1 EUWYN8KBZW1 EUWYP8KBZW1 EUWYB8KBZW1 Nominal capacity Cooling: 9.1 kW Cooling: 17.1 kW Heating: 18.5 kW Heating: 11.9 kW Cooling: 3.78 kW Cooling: 7.45 kW Cooling: 7.46 kW Nominal input Heating: 4.59 kW...
  • Page 28 General Outline ESIE11-02 Model EUWYN5KBZW1 EUWYP5KBZW1 EUWYB5KBZW1 EUWYN8KBZW1 EUWYP8KBZW1 EUWYB8KBZW1 Oil charge volume 1.5 l 2.7 l No. of circuits 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 249 kPa 203 kPa height pump Nominal static...
  • Page 29 ESIE11-02 General Outline : 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 ■...

  • Page 30: Technical Specifications: Euwy*10-12Kbzw1

    General Outline ESIE11-02 Technical Specifications: EUWY*10-12KBZW1 Technical The table below contains the technical specifications. specifications Model EUWYN10KBZW1 EUWYP10KBZW1 EUWYB10KBZW1 EUWYN12KBZW1 EUWYP12KBZW1 EUWYB12KBZW1 Nominal capacity Cooling: 21.0 kW Cooling: 25.0 kW Heating: 27.0 kW Heating: 24.0 kW Cooling: 8.57 kW Cooling: 11.4 kW Nominal input Heating: 10.8 kW Heating: 9.10 kW...
  • Page 31 ESIE11-02 General Outline Model EUWYN10KBZW1 EUWYP10KBZW1 EUWYB10KBZW1 EUWYN12KBZW1 EUWYP12KBZW1 EUWYB12KBZW1 Oil charge volume 2.7 l No. of circuits 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 237 kPa 223 kPa height pump Nominal static 167 kPa...
  • Page 32 General Outline ESIE11-02 : 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 ■...

  • Page 33: Technical Specifications: Euwy*16-20Kbzw1

    ESIE11-02 General Outline Technical Specifications: EUWY*16-20KBZW1 Technical The table below contains the technical specifications. specifications Model EUWYN16KBZW1 EUWYP16KBZW1 EUWYB16KBZW1 EUWYN20KBZW1 EUWYP20KBZW1 EUWYB20KBZW1 Nominal capacity Cooling: 34.2 kW Cooling: 40.0 kW Heating: 46.0 kW Heating: 37.0 kW Cooling: 14.9 kW Cooling: 16.3 kW Nominal input Heating: 17.4 kW Heating: 14.2 kW...
  • Page 34 General Outline ESIE11-02 Model EUWYN16KBZW1 EUWYP16KBZW1 EUWYB16KBZW1 EUWYN20KBZW1 EUWYP20KBZW1 EUWYB20KBZW1 Oil charge volume 2 x 2.7 l No. of circuits Pump No. x type 1 x Horizontal multi-stage end-suction 1 x Horizontal multi-stage end-suction Model CM10-2 CM10-2 Nominal static 302 kPa 296 kPa height pump Nominal static...
  • Page 35 ESIE11-02 General Outline : 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 ■...

  • Page 36: Technical Specifications: Euwy*24Kbzw1

    General Outline ESIE11-02 Technical Specifications: EUWY*24KBZW1 Technical The table below contains the technical specifications. specifications Model EUWYN24KBZW1 EUWYP24KBZW1 EUWYB24KBZW1 Nominal capacity Cooling: 50.0 kW Heating: 54.0 kW Cooling: 22.8 kW Nominal input Heating: 21.6 kW 0%-100% Capacity steps Compressor Type Hermetically sealed scroll Speed 2900 rpm...
  • Page 37 ESIE11-02 General Outline Model EUWYN24KBZW1 EUWYP24KBZW1 EUWYB24KBZW1 No. of circuits Pump No. x type 1 x Horizontal multi-stage end-suction Model CM10-2 Nominal static height 284 kPa pump Nominal static height 185 kPa unit Hydraulic components Buffer tank 55 l Unit water volume 10 l 66 l Expansion vessel...
  • Page 38 General Outline ESIE11-02 : 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 ■...

  • Page 39: Correction Factors For Glycol

    ESIE11-02 General Outline 1.10 Correction factors for glycol Correction factors The illustration below shows the correction factors for glycol for EUWA*5-24KBZW1 and EUWY*5-24KBZW1. Part 1 – System Outline 1–29...
  • Page 40 General Outline ESIE11-02 Legend The table below describes the patterns and symbols used for the correction factors illustration above. Pattern Description Ethylene glycol Propylene glycol Correction on cooling capacity Correction on power input Correction on flow rate Correction on pressure drop Glycol freezing The table below contains glycol freezing points for different glycol concentrations.

  • Page 41: Electrical Specifications: Euwa*5-8Kbzw1

    ESIE11-02 General Outline 1.11 Electrical Specifications: EUWA*5-8KBZW1 Electrical The table below contains the electrical specifications specifications Model EUWAN5KBZW1 EUWAP5KBZW1 EUWAB5KBZW1 EUWAN8KBZW1 EUWAP8KBZW1 EUWAB8KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 62.2 A 63.5 A 97.9 A...
  • Page 42 General Outline ESIE11-02 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 + fan +pumps. ■ Operation range The operation range covers a leaving evaporator water temperature from 5°C to 20°C (pull down condition to 25°C).

  • Page 43: Electrical Specifications: Euwa*10-12Kbzw1

    ESIE11-02 General Outline 1.12 Electrical Specifications: EUWA*10-12KBZW1 Electrical The table below contains the electrical specifications specifications Model EUWAN10KBZW1 EUWAP10KBZW1 EUWAB10KBZW1 EUWAN12KBZW1 EUWAP12KBZW1 EUWAB12KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 113 A 114 A 139 A...
  • Page 44 General Outline ESIE11-02 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 + fan +pumps. ■ Operation range The operation range covers a leaving evaporator water temperature from 5°C to 20°C (pull down condition to 25°C).

  • Page 45: Electrical Specifications: Euwa*16-20Kbzw1

    ESIE11-02 General Outline 1.13 Electrical Specifications: EUWA*16-20KBZW1 Electrical The table below contains the electrical specifications. specifications Model EUWAN16KBZW1 EUWAP16KBZW1 EUWAB16KBZW1 EUWAN20KBZW1 EUWAP20KBZW1 EUWAB20KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 97.9 A 99.9 A 113 A...
  • Page 46 General Outline ESIE11-02 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 + fan +pumps. ■ Operation range The operation range covers a leaving evaporator water temperature from 5°C to 20°C (pull down condition to 25°C).

  • Page 47: Electrical Specifications: Euwa*24Kbzw1

    ESIE11-02 General Outline 1.14 Electrical Specifications: EUWA*24KBZW1 Electrical The table below contains the electrical specifications. specifications Model EUWAN24KBZW1 EUWAP24KBZW1 EUWAB24KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 139 A 142 A Nominal running 41.0 A 43.7 A...
  • Page 48 General Outline ESIE11-02 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 + fan +pumps. ■ Operation range The operation range covers a leaving evaporator water temperature from 5°C to 20°C (pull down condition to 25°C).

  • Page 49: Electrical Specifications: Euwy*5-8Kbzw1

    ESIE11-02 General Outline 1.15 Electrical Specifications: EUWY*5-8KBZW1 Electrical The table below contains the electrical specifications specifications Model EUWYN5KBZW1 EUWYP5KBZW1 EUWYB5KBZW1 EUWYN8KBZW1 EUWYP8KBZW1 EUWYB8KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 62.2 A 63.5 A 97.9 A...
  • Page 50 General Outline ESIE11-02 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/-20°C for ZH/ZL option) to 20°C (pull down ■...

  • Page 51: Electrical Specifications: Euwy*10-12Kbzw1

    ESIE11-02 General Outline 1.16 Electrical Specifications: EUWY*10-12KBZW1 Electrical The table below contains the electrical specifications specifications Model EUWYN10KBZW1 EUWYP10KBZW1 EUWYB10KBZW1 EUWYN12KBZW1 EUWYP12KBZW1 EUWYB12KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 113 A 114 A 139 A...
  • Page 52 General Outline ESIE11-02 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/-20°C for ZH/ZL option) to 20°C (pull down ■...

  • Page 53: Electrical Specifications: Euwy*16-20Kbzw1

    ESIE11-02 General Outline 1.17 Electrical Specifications: EUWY*16-20KBZW1 Electrical The table below contains the electrical specifications. specifications Model EUWYN16KBZW1 EUWYP16KBZW1 EUWYB16KBZW1 EUWYN20KBZW1 EUWYP20KBZW1 EUWYB20KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 97.9 A 99.9 A 113 A...
  • Page 54 General Outline ESIE11-02 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/-20°C for ZH/ZL option) to 20°C (pull down ■...

  • Page 55: Electrical Specifications: Euwy*24Kbzw1

    ESIE11-02 General Outline 1.18 Electrical Specifications: EUWY*24KBZW1 Electrical The table below contains the electrical specifications. specifications Model EUWYN24KBZW1 EUWYP24KBZW1 EUWYB24KBZW1 Power supply Phase Frequency 50 Hz Voltage 400 V Voltage tolerance ± 10 % Unit Starting current 139 A 142 A Nominal running 41.0 A 43.7 A...
  • Page 56 General Outline ESIE11-02 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/-20°C for ZH/ZL option) to 20°C (pull down ■...

  • Page 57: Outlook Drawing: Euwan5-8Kbzw1/Euwyn5-8Kbzw1

    ESIE11-02 General Outline 1.19 Outlook Drawing: EUWAN5-8KBZW1/EUWYN5-8KBZW1 EUWAN5-8KBZW1/ The illustration below shows the outlook, the dimensions and the installation and service space of the EUWYN5-8KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 58: Outlook Drawing: Euwap5-8Kbzw1/Euwyp5-8Kbzw1

    General Outline ESIE11-02 1.20 Outlook Drawing: EUWAP5-8KBZW1/EUWYP5-8KBZW1 EUWAP5-8KBZW1/ The illustration below shows the outlook, the dimensions and the installation and service space of the EUWYP5-8KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 59: Outlook Drawing: Euwab5-8Kbzw1/Euwyb5-8Kbzw1

    ESIE11-02 General Outline 1.21 Outlook Drawing: EUWAB5-8KBZW1/EUWYB5-8KBZW1 EUWAB5-8KBZW1/ The illustration below shows the outlook, the dimensions and the installation and service space of the EUWYB5-8KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 60: Outlook Drawing: Euwan10-12Kbzw1/Euwyn10-12Kbzw1

    General Outline ESIE11-02 1.22 Outlook Drawing: EUWAN10-12KBZW1/EUWYN10-12KBZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAN10-12KBZW1 /EUWYN10-12KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 61: Outlook Drawing: Euwap10-12Kbzw1/Euwyp10-12Kbzw1

    ESIE11-02 General Outline 1.23 Outlook Drawing: EUWAP10-12KBZW1/EUWYP10-12KBZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAP10-12KBZW1/ EUWYP10-12KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 62: Outlook Drawing: Euwab10-12Kbzw1/Euwyb10-12Kbzw1

    General Outline ESIE11-02 1.24 Outlook Drawing: EUWAB10-12KBZW1/EUWYB10-12KBZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAB10-12KBZW1 /EUWYB10-12KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 63: Outlook Drawing: Euwan16Kbzw1/Euwyn16Kbzw1

    ESIE11-02 General Outline 1.25 Outlook Drawing: EUWAN16KBZW1/EUWYN16KBZW1 EUWAN16KBZW1/ The illustration below shows the outlook, the dimensions and the installation and service space of the EUWYN16KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN FIXATION 4XØ15...

  • Page 64: Outlook Drawing: Euwap16Kbzw1/Euwyp16Kbzw1

    General Outline ESIE11-02 1.26 Outlook Drawing: EUWAP16KBZW1/EUWYP16KBZW1 EUWAP16KBZW1/ The illustration below shows the outlook, the dimensions and the installation and service space of the EUWYP16KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN CAUTION FOR FAN FIXATION...

  • Page 65: Outlook Drawing: Euwab16Kbzw1/Euwab16Kbzw1

    ESIE11-02 General Outline 1.27 Outlook Drawing: EUWAB16KBZW1/EUWAB16KBZW1 EUWAB16KBZW1/ The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAB16KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN CAUTION FOR FAN FIXATION...

  • Page 66: Outlook Drawing: Euwan20-24Kbzw1/Euwyn20-24Kbzw1

    General Outline ESIE11-02 1.28 Outlook Drawing: EUWAN20-24KBZW1/EUWYN20-24KBZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAN20-24KBZW1 /EUWYN20-24KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN CAUTION FOR FAN FIXATION...

  • Page 67: Outlook Drawing: Euwap20-24Kbzw1/Euwyp20-24Kbzw1

    ESIE11-02 General Outline 1.29 Outlook Drawing: EUWAP20-24KBZW1/EUWYP20-24KBZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAP20-24KBZW1/ EUWYP20-24KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN CAUTION FOR FAN FIXATION...

  • Page 68: Outlook Drawing: Euwab20-24Kbzw1/Euwyb20-24Kbzw1

    General Outline ESIE11-02 1.30 Outlook Drawing: EUWAB20-24KBZW1/EUWYB20-24KBZW1 The illustration below shows the outlook, the dimensions and the installation and service space of the EUWAB20-24KBZW1 /EUWYB20-24KBZW1 unit (mm). FREE SPACE B1/B2 FILTERKIT (delivered with the unit) SERVICE SPACE FREE SPACE MIN 3m CAUTION FOR FAN CAUTION FOR FAN FIXATION...

  • Page 69: Piping Layout

    ESIE11-02 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 a common practice and is, therefore, not described. Overview This chapter contains the following topics: Topic See page 2.2–Installation outline...

  • Page 70: Installation Outline

    Piping Layout ESIE11-02 Installation outline Introduction The installation outline contains the main parts of a typical installation: Chiller ■ Primary water circuit ■ Secondary water circuit. ■ Typical installation The illustration below shows a typical installation. Some of these components may not be present in all the chillers described in this manual.

  • Page 71: Functional Diagram Refrigeration Circuit: Euwa*5-24Kbzw1

    ESIE11-02 Piping Layout Functional Diagram Refrigeration Circuit: EUWA*5-24KBZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration circuit of EUWA*5-24KBZW1. It is also applicable for glycol applications. Part 1 – System Outline 1–61...
  • Page 72 Piping Layout ESIE11-02 Symbols The table below describes the symbols. Symbol Description Symbol Description Inlet water temperature sensor Check valve Outlet water temperature sensor Flare connection Ambient temperature sensor Screw connection S*HP High-pressure switch Flange connection S*LP Low-pressure switch Pinched pipe Condensor fan Spinned pipe Compressor...
  • Page 73 ESIE11-02 Piping Layout Components water The table below describes the main components of the refrigeration circuit on the water side. side Component Function / remark Shut-off valve Makes it possible to shut-off a part of the water piping for maintenance (e.g. to change a filter). Air purge To purge the water circuit, to prevent air from entering the water circuit.

  • Page 74: Functional Diagram Refrigeration Circuit: Euwy*5-24Kbzw1

    Piping Layout ESIE11-02 Functional Diagram Refrigeration Circuit: EUWY*5-24KBZW1 Functional diagram The illustration below shows the functional diagram of the refrigeration circuit of EUWY*5-24KBZW1. It is also applicable for glycol applications. 1–64 Part 1 – System Outline...
  • Page 75 ESIE11-02 Piping Layout Symbols The table below describes the symbols. Symbol Description Symbol Description Inlet water temperature sensor Condensor fan Outlet water temperature sensor Compressor Ambient temperature sensor Check valve R7-8T Coil temperature sensor Flare connection S*HP High-pressure switch Screw connection S*LP Low-pressure switch Flange connection...
  • Page 76 Piping Layout ESIE11-02 Component Function / remark High-pressure The high-pressure service port is used to connect a service port high-pressure gauge. Liquid receiver The liquid receiver temporarily holds the refrigerant which has been liquified by the condensor before being send to the expansion valve.

  • Page 77: What Is In This Chapter

    ESIE11-02 Wiring Layout Part 1 Wiring Layout What Is in This Chapter? Introduction This chapter contains the following information: Main functions of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ■ Switch box layout ■ Wiring diagram ■ Overview This chapter contains the following topics: Topic See page 3.2–Main Functions of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1...

  • Page 78: Main Functions Of The Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    Wiring Layout ESIE11-02 Main Functions of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Main functions The table below describes the components connected to the µC2SE. 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 (only for EUWY)

  • Page 79: Switch Box Layout: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Wiring Layout Switch Box Layout: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Double circuit The illustration below shows the switch box layout for a double circuit. layout Part 1 – System Outline 1–69...
  • Page 80 Wiring Layout ESIE11-02 Single circuit layout The illustration below shows the switch box layout for a single circuit. Components The table below describes the components. Wiring diagram Description symbol C1/C2/C3/C4 AC motor capacitors 12 µF TR1/TR2 Power supply transformator Pump contactor Pump K4S/K5S Circuit 1/circuit 2...

  • Page 81: Pcb Layout Of The Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Wiring Layout PCB Layout of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 PCB layout The illustration below shows the I/O PCB layout of chiller types EUWA*5-24KBZW1 and EUWY*5-24KBZW1. X73A X50A X55A X79A X80A X78A X70A X52A X53A Part 1 – System Outline 1–71...
  • Page 82 Wiring Layout ESIE11-02 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 83 ESIE11-02 Wiring Layout Wiring diagram Connector Description symbol X51A X2 (C3/4, No3, No4) To A1P MicroChiller compact 2 SE (pump + reverse valve) X52A NO contact of K1M X53A NO contact of K2M X55A (G, GO) Power supply to MicroChiller compact 2 SE X56A (N, L3) Power supply for evaporator heater tape...
  • Page 84 Wiring Layout ESIE11-02 Wiring diagram Connector Description symbol PE (GRN/YLW) To earth Dipswitches and The illustration below shows the dipswitches and pushbuttons on the PCB. pushbuttons Function The table below describes the function of the dipswitches and pushbuttons on the PCB. Dipswitch 1 Dipswitch 2 0 = 1 circ.

  • Page 87: Functional Description

    ESIE11-02 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 for valuable information on servicing and troubleshooting.
  • Page 88 ESIE11-02 2–2 Part 2 – Functional Description...

  • Page 89: What Is In This Chapter

    ESIE11-02 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 90: Operational Range: Euwa*5-24Kbzw1

    Functional Description ESIE11-02 Operational Range: EUWA*5-24KBZW1 Operational range The illustration below shows the operational range of EUWA*5-24KBZW1. Outdoor temp. (°CDB) OPTION STANDARD STANDARD Water Glycol Leaving evaporator water temp. (°C) Legend The table below describes the patterns and abbreviations used in the operational range illustration above.

  • Page 91: Operational Range: Euwy*5-24Kbzw1

    ESIE11-02 Functional Description Operational Range: EUWY*5-24KBZW1 Operational range The illustration below shows the operational range in cooling mode of the EUWY*5-24KBZW1. in cooling mode Outdoor temp. (°CDB) OPTION STANDARD STANDARD Water Glycol Leaving evaporator water temp. (°C) Operational range The illustration below shows the operational range in heating mode of the EUWY*5-24KBZW1. in heating mode Part 2 –...
  • Page 92 Functional Description ESIE11-02 Legend The table below describes the patterns and abbreviations used in the operational range illustration above. Pattern/ Abbrevia- Description tion Standard operation Pull-down area Protection water circuit against freezing If the units operate below -5°C and are installed in a draughty space, a windscreen is required Option to produce evaporating leaving water temperature till -5°C Option to produce evaporating leaving water temperature till -10°C...

  • Page 93: Operational Flow Chart

    ESIE11-02 Functional Description Operational Flow Chart Flow chart The flow chart below describes the operation of EUWA*5-24KBZW1. Power ON Start cooling Thermostat control Stop Flow chart The flow chart below describes the operation of EUWY*5-24KBZW1. Power ON Start in cooling Start in heating Thermostat control Stop...

  • Page 94: Compressor Working Status

    Functional Description ESIE11-02 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 95: Compressor Timers

    ESIE11-02 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 96: Thermostat Control: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    Functional Description ESIE11-02 Thermostat Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Functional diagram The illustration below shows the thermostat control of 5-12HP. 5-12HP r01: Cooling set point Compressor (default 12°C) r03: Heating set point (default 30°C) only for EUWY*5-24KBZW1 r21: Cooling set point 2 r01/r21 r03/r22 r22: Heating set point 2...

  • Page 97: Head Pressure Control: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Functional Description Head Pressure Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Functional The chillers are equipped with a fan control to limit the high pressure based on ambient ■ description temperature. Each circuit (K4A, K5A and K12A) has the same functionality. ■ Fan management in The illustration below shows the fan management in cooling mode.
  • Page 98 Functional Description ESIE11-02 Fan relay The table below describes the fan relay management in heating mode. This is only valid for the heat management in pump (EUWY*5-24KBZW1). heating mode Fan relay Fan relay Fan relay Result RY4/RY24 RY5/RY25 RY12 For units with 2 circuits and fans Fans Closed...

  • Page 99: Fan Working: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Functional Description Fan Working: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Working principle The fan runs parallel with the compressor operation. The operation is not steered by the microchiller controller but by the I/O PCB. See “Head Pressure Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1” on page 2-11. Part 2 –...

  • Page 100: Crankcase Heater

    Functional Description ESIE11-02 1.10 Crankcase Heater Functional The crankcase heater should always work when the compressor is in the OFF status. The crankcase description heater should be used with compressors in order to avoid that refrigerant is dissolving in the compressor oil during standstill.

  • Page 101: Evaporator Heater Tape Management: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Functional Description 1.11 Evaporator Heater Tape Management: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Functional The evaporator heater tape management protects the evaporator (and field piping) against freezing. description When the compressors 1 and 2 are switched off and the ambient temperature is low, then the evaporator heater, field heater and buffertank heater (K6A) are switched on.

  • Page 102: Pump Steering

    Functional Description ESIE11-02 1.12 Pump Steering Pump steering A pumpcontact should be present with pumplead (15 s) and pumplag (0 s) timers taken into account. 2–16 Part 2 – Functional Description...

  • Page 103: Freeze-Up Control: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Functional Description 1.13 Freeze-up Control: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 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...

  • Page 104: Defrost Management For Euwy*5-24Kbzw1

    Functional Description ESIE11-02 1.14 Defrost Management for EUWY*5-24KBZW1 Functional The characteristics of the defrost management are the following: description The defrost function is only active in heating mode. ■ The defrost cycle can only be performed if the compressor is on. ■...
  • Page 105 ESIE11-02 Functional Description Fan status during The table below shows the fan status during defrost. defrost Fans during defrost K12A Fan defrost 1 M11F: off and M12F: off / Open Open Open M21F: off and M22F: off Fan defrost 2 If (Ambient at defrost M11F: Medium and Open...
  • Page 106 Functional Description ESIE11-02 Starting defrost The table below describes the start conditions for the defrost function. function C1/2 < 0.6 x T -10°C TimConditional coil C1/2 < -10°C Start condition 1 coil < 50°C Start condition 2A: TimConditional C1/2 < 0.6 x T -10°C coil Depending on...
  • Page 107 ESIE11-02 Functional Description Defrost starting The table below describes the timers important to start the defrost cycle. timers Start- Timer Description Steps and conditions value TimConditional 1/2 The minimum time that the defrost start Start of timer 150 s ■ condition 1 or 2A must be met to start the defrost cycle.
  • Page 108 Functional Description ESIE11-02 Defrost cycle timers The table below describes the timers that are important in the defrost cycle. Timer Description Startvalue TimdefrMin The minimum time that a defrost cycle must be active. 10 s (The timer only starts to count when the compressor is on.) TimDefrMax The maximum time that a defrost can be active.
  • Page 109 ESIE11-02 Functional Description Illustration The illustrations below show the defrost cycle without and with compressor stop during the defrost compressor stop cycle. function Start TimDefrMin Start TimDefrMask Start TimDefrMax Defrost cycle Defrost BusyC1 Compr. DORev Valve Time Start TimDefrMin Start TimDefrMask Start TimDefrMax Defrost cycle Defrost...

  • Page 110: Changeable Digital Inputs

    Functional Description ESIE11-02 1.15 Changeable Digital Inputs Selecting local or User parameter h0b in combination with the remote cool/heat selection switch (installed by the remote cool/heat customer) allows the user to select cooling or heating mode without using the D or C key on control the controller.

  • Page 111: What Is In This Chapter

    ESIE11-02 The Digital Controller Part 2 The Digital Controller What Is in This Chapter? Introduction This chapter contains information on the digital controller EUWA*5-24KBZW1 and EUWY*5-24KBZW1. Overview This chapter contains the following topics: Topic See page 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...
  • Page 112 The Digital Controller ESIE11-02 The Digital Controller Digital controller EUWA*5-24KBZW1 and EUWY*5-24KBZW1 units are equipped with a digital controller (MicroChiller Compact 2 SE) offering a user-friendly way to configure, use and maintain the unit. The digital controller consists of: A numeric display ■...
  • Page 113 ESIE11-02 The Digital Controller Keys The table below contains an overview of the keys and their functions. The function carried out when the user presses one or a combination of these keys depends on the status of the controller and the unit at that specific moment. Keys digital Keys remote Sensor readout...
  • Page 114 The Digital Controller ESIE11-02 When selecting a parameter group or parameter, different LEDs related to the parameter group or parameter are displayed. Example: The LEDs F and G are displayed when accessing a parameter group or when accessing parameters directly. Remarks Temperature readout tolerance: ±1°C.

  • Page 115: The Digital Controller

    ESIE11-02 The Digital Controller Start/Stop At power ON When the power is ON, the display shows the inlet water temperature. Switching the unit To switch the unit on in cooling mode, proceed as follows: Press the D key for approximately 5 seconds, the G LED will be displayed. ■...
  • Page 116 The Digital Controller ESIE11-02 If start/stop and cool/heat , then... to... set-up is... set-up is... Local (h07=0) Remote (h0b=1) Switch remote cool/heat Switch on the unit automatically. Only cool/heat selection is possible. REMARK: Remote cool/heat control can only be used in case p09=9. Remote on/off control can only be used in case p34=23.

  • Page 117: What Happens In Case Of An Alarm Or A Warning

    ESIE11-02 The Digital Controller 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 The unit is shut down. The display starts flashing, alternately ■...

  • Page 118: Settings: Direct And User Parameters

    The Digital Controller ESIE11-02 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. ■...
  • Page 119 ESIE11-02 The Digital Controller Parameter Parameter Parameter Default Read/ User/ Modbus Description Units group code value Write Direct Address type Changeable digital input selection 0=no function 9=remote cool/heat (only active in combination with h06) 13=remote dual setpoint DO NOT SELECT OTHER VALUES Changeable digital input selection 0=no function 13=remote dual setpoint...
  • Page 120 The Digital Controller ESIE11-02 How to consult and REMARK: When user parameters are consulted, the direct parameters are displayed as well. modify the user parameters For an overview of the menu structure, refer to "Menu Overview" on page 2–38. 1 In case of digital controller, press the A and B keys for approximately 5 seconds until O is displayed.
  • Page 121 ESIE11-02 The Digital Controller Consulting actual The actual operational information that can be consulted in the list of direct parameters consists of: operational Evaporator inlet water temperature, ■ b01: information Evaporator outlet water temperature, ■ b02: Not used, ■ b03: Total running hours of the compressor 1, ■...

  • Page 122: Reading Or Adjusting Parameter Settings: The Programming Procedure

    The Digital Controller ESIE11-02 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 ■...
  • Page 123 ESIE11-02 The Digital Controller Reading or To read or adjust parameter settings, proceed as follows: adjusting Start Do you want access to all parameters? Press for 5 s. Press for 5 s to access only direct parameters. Enter user password with the C and D keys.

  • Page 124: Menu Overview

    The Digital Controller ESIE11-02 Menu Overview Overview (*) l-p function is not used 2–38 Part 2 – Functional Description...

  • Page 125: Option Ekac10C Address Card

    ESIE11-02 The Digital Controller Option EKAC10C Address Card Overview EKAC10C EKAC10C EKAC10C EKAC10C h10 = 1 EKAC10C T– h10 = n EKAC10C ...n 2x 0.35 mm / AWG 22 120 Ω T– 120 Ω (1/4 W 120 Ohm) EKAC10C EKRUMCA Remark Modbus communication RS485/RTU only ■...

  • Page 126: Option Ekrumca Remote Controller

    The Digital Controller ESIE11-02 Option EKRUMCA Remote Controller Overview EKRUMCA EKRUMCA EKRUMCA 30.2 156.2 – + GND RS485 24 Vac 120 Ω EKAC10C (1/4 W 120 Ohm) 2x 1.5 mm / AWG 16 EKAC10C ≤1000 m 120 Ω 120 Ω EUWYN/P/B5~24KB 1 c m 1 c m...
  • Page 127 ESIE11-02 The Digital Controller Remark Modbus communication and remote controller cannot be selected at the same time. When Modbus communication is enabled (parameter code: H23 = 1), the remote controller will indicate ‘OFFLINE’. To enable the use of the remote controller, disable the Modbus communication (parameter code: H23 = 0) Part 2 –...
  • Page 128 The Digital Controller ESIE11-02 2–42 Part 2 – Functional Description...
  • Page 129 ESIE11-02 Part 3 Troubleshooting Introduction The small water chillers EUWA*5-24KBZW1 and EUWY*5-24KBZW1 are equipped with a digital controller and an I/O (input/output) PCB. These PCB’s 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 PCB’s and finally the output devices.
  • Page 130 ESIE11-02 3–2 Part 3 – Troubleshooting...
  • Page 131 ESIE11-02 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 132 Inputs and Outputs Overview ESIE11-02 Inputs and Outputs Overview: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 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 EUWA*5-24KBZW1 and EUWY*5-24KBZW1" on page 1–71. ■...
  • Page 133 ESIE11-02 Inputs and Outputs Overview Inputs/outputs overview of the I/O PCB: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Digital inputs to I/O The table below describes the digital inputs to the I/O PCB. Output from Output Description digital Open = 0 Closed = 1 controller controller Reversed phase detection (L1-N)
  • Page 134 Inputs and Outputs Overview ESIE11-02 Analog inputs The table below describes the analog inputs. EUWA EUWY 1 circ 2 circ 1 circ 2 circ Ambient sensor Coil temperature sensor circuit 1 Coil temperature sensor circuit 2 3–6 Part 3 – Troubleshooting...
  • Page 135 ESIE11-02 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 136 Malfunction Indications and Safeties Overview ESIE11-02 Malfunction Indications Overview: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Alarm and warning The following alarm and warning codes may appear on the screen: codes Alarm/ Code Description Reset See page Warning indicates an anti-freeze alarm. Alarm Manual 3–11 indicates that the NTC probe used to measure the Alarm...
  • Page 137 ESIE11-02 Malfunction Indications and Safeties Overview Alarm/ Code Description Reset See page Warning Offline communication failure between the digital Alarm Automatic 3–11 controller of the unit and the remote user interface. Confirm the correct selection of parameter code h23. This should be default setting 0 and confirm the correction installation according to the installation manual of the remote user interface EKRUMCA.
  • Page 138 Malfunction Indications and Safeties Overview ESIE11-02 Resetting warnings During normal operation, the display of the controller may start flashing, alternately showing the inlet water temperature and the following warning code: hc1: indicates that the compressor 1 requires maintenance: the total running hours of the ■...
  • Page 139 ESIE11-02 Malfunction Indications and Safeties Overview Safeties Overview: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 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 140 Malfunction Indications and Safeties Overview ESIE11-02 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 141 ESIE11-02 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 142: Checking The Temperature Sensors

    Checking the Inputs and Outputs ESIE11-02 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 PCB or an output device. Temperature The following sensors of the EUWA*5-24KBZW1 and EUWY*5-24KBZW1 are connected to the I/O sensors PCB: R3T/ R4T and R6T/R7T/R8T.
  • Page 143 ESIE11-02 Checking the Inputs and Outputs I/O PCB sensors: R3T and R4T for EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Temp.-resistance The table below contains the temperature resistance values of the I/O PCB sensors R3T and R4T. Resistance (kΩ) Resistance (kΩ) Resistance (kΩ) Temp. Temp.

  • Page 144: Euwy*5-24Kbzw1

    Checking the Inputs and Outputs ESIE11-02 I/O PCB sensors: R6T, R7T and R8T for EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Temp.-resistance The table below contains the temperature resistance values of the I/O PCB sensors R6T, R7T and R8T. Resistance (kΩ) Resistance (kΩ) Resistance (kΩ) Temp.

  • Page 145: Checking The Digital Inputs And Outputs

    ESIE11-02 Checking the Inputs and Outputs 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 146: Checking The Power Supply And Fuses: Euwa*5-24Kbzw1 And

    Checking the Inputs and Outputs ESIE11-02 Checking the Power Supply and Fuses: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 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 F1+F2+F3...
  • Page 147 ESIE11-02 Checking the Inputs and Outputs Overview fuses and The table below contains an overview of the fuses and overcurrent for types EUWA*5-24KBZW1 and overcurrent EUWY*5-24KBZW1. All models (400 V) Fuses + 10HP 12HP 16HP 20HP 24HP overcurrent 125 mAT 125 mAT 125 mAT 125 mAT...

  • Page 148: Electrical Error Overview: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    Checking the Inputs and Outputs ESIE11-02 Electrical Error Overview: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Introduction This map gives an overview of the most common electrical errors that can occur on the EUWA*5-24KBZW1 and the EUWY*5-24KBZW1. See also "Wiring Diagram: EUWA*5-24KBZW1 and EUWY*5-24KBZW1" on page 1–75. General items Before proceeding, confirm the status of the following items: Microchiller compact: is the controller initialized? Are all parameters set?
  • Page 149 ESIE11-02 Checking the Inputs and Outputs High pressure switch S1HP Check S1HP. ■ circuit 1 High pressure switch ■ S2HP Check S2HP. circuit 2 If only 1 circuit: ■ Check shortcut. shortcut Overcurrent X10A Check K4S. ■ protection compr. 1 Overcurrent ■...
  • Page 150 Checking the Inputs and Outputs ESIE11-02 Fans of circuit 2 do not run Fan fuse of circuit 1 blown Check fuse. Thermal protector fan circuit 1 Q21F X14A Check Q21F. Q22F X15A Check Q22F. Wiring connector X23A Check wiring connector X23A.
  • Page 151 ESIE11-02 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 152: Items To Be Checked

    Troubleshooting ESIE11-02 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. ■...
  • Page 153 ESIE11-02 Troubleshooting Malfunction Possible causes Items to be checked Flow switch or Damaged flow switch Flow switch ■ ■ pump contact Incorrect pump operation Pump operation ■ ■ Incorrect field wiring Field wiring ■ ■ Defective control devices Control devices ■...

  • Page 154: 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 155: Locking And Unlocking The Keyboard

    ESIE11-02 Troubleshooting Locking and Unlocking the Keyboard Locked keyboard Once user parameter h09 is set to 0, the following advanced features can no longer be carried out by means of the controller: modifying direct and user parameters (parameters can be displayed but not modified) ■...

  • Page 156: Replacing The Controller: Euwa*5-24Kbzw1

    Troubleshooting ESIE11-02 Replacing the Controller: EUWA*5-24KBZW1 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 157 ESIE11-02 Troubleshooting Modify parameters The factory menu is used to set up the identification parameters according to the required unit model. according to required unit model Most of the settings are already preset (also for spare part controller). The table below gives the parameter code and the value of the parameters that have to be modified according to the unit model.

  • Page 158: Replacing The Controller: Euwy*5-24Kbzw1

    Troubleshooting ESIE11-02 Replacing the Controller: EUWY*5-24KBZW1 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 159 ESIE11-02 Troubleshooting Modify parameters The factory menu is used to set up the identification parameters according to the required unit model. according to required unit model Most of the settings are already preset (spare part controller). The table below gives the parameter code and the value of the parameters that have to be modified according to the unit model.

  • Page 160: Parameter And Parameter Level Overview

    Troubleshooting ESIE11-02 Parameter and Parameter Level Overview Overview The table below shows the full list of all parameters with the corresponding setpoint according to the unit type. This table can be used as reference when during programming of the controller a parameter was changed which was not indicated in the ‘replacing the controller’...
  • Page 161 ESIE11-02 Troubleshooting 4. Compressor setting parameters (c*) Min. ON time 232 INT Min. OFF time 233 INT Delay between 2 starts of 240 240 240 240 240 240 240 240 240 240 240 240 R/W 234 INT the same compressor Start delay between the 235 INT two compressors...
  • Page 162 Troubleshooting ESIE11-02 7. Unit setting parameters (H*) Unit type 261 INT Number of condensers Number of evaporators Number of comp per circuit 1,9 262 INT Pump func logic 263 INT Cooling/heating pump On/off input Network configuration 264 INT Keyboard lockup Serial address 265 INT Output modes...
  • Page 163 ESIE11-02 Troubleshooting Select digital input 5 R/W 122 329 INT Mute alarm with ‘mute’ button Type of HP alarm management 9. Control setting parameters (r*) Cooling setpoint °C Cooling hysteresis °C Heating setpoint °C Heating hysteresis °C Compressor rotation 285 INT Type of compressor °C 286 INT...
  • Page 164 Troubleshooting ESIE11-02 Heating compensation constant Enable free cooling / free R/W 116 323 INT heating 10. Timer setting parameters (t*) (all parameters are not applicable) 11. Firmware parameters (Fr*) Software version 208 INT (displayed at power up) (*) Bold = different from default, “-” = not applicable because of other setting (**) level type (L-P): D=Direct, U=User, S=Super user, F=Factory 3–36 Part 3 –...

  • Page 165: Replacing The Pcb: Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    ESIE11-02 Troubleshooting Replacing the PCB: EUWA*5-24KBZW1 and EUWY*5-24KBZW1 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 166: Soft Starter (Option Ekss) Thermal Protection

    Troubleshooting ESIE11-02 Soft Starter (option EKSS) Thermal Protection Introduction The PS S 25 (soft starter) is used in small chillers to reduce the starting current of the compressor. The soft starter is equipped with an internal protection that prevents the softstarter from heating. Functional Inside the PS S 25, a heat sink is connected to the triac.

  • Page 167: Commissioning And Test Run

    ESIE11-02 Part 4 Commissioning and Test Run 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 168 ESIE11-02 4–2 Part 4 – Commissioning and Test Run...

  • Page 169: Pre-Test Run Checks

    ESIE11-02 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 170: General Checks

    Pre-Test Run Checks ESIE11-02 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 171: Water Piping Checks

    ESIE11-02 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 172 Pre-Test Run Checks ESIE11-02 Calculation of the The calculation method below is based on the fact that the water volume in a chiller should be large minimum water enough to prevent the compressor from excessive cycling. Sufficient water volume gives a certain volume inertia to the system, so that: Water (or glycol) temperature does not drop too fast when the unit turns ON.
  • Page 173 ESIE11-02 Pre-Test Run Checks Tendency if out of Evaporator water Heated water (low temperature) criteria Ammonium ion < 1.0 < 0.1 < 0.3 < 0.1 Corrosion mg NH Remaining chloride mg Cl/l < 0.3 < 0.3 < 0.25 < 0.3 Corrosion Free carbide mg CO...

  • Page 174: External Static Pressure: Euwa*5-24Kbzw1

    Pre-Test Run Checks ESIE11-02 External Static Pressure: EUWA*5-24KBZW1 External static The illustration below shows the external static pressure of the unit depending on the water flow. pressure ESP std CO SP (kPa) WF (l/min) 0,00 50,00 100,00 150,00 200,00 4–8 Part 4 –...
  • Page 175 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Static pressure of the unit Waterflow rate EUWA*5KBZW1 EUWA*8KBZW1 EUWA*10KBZW1 EUWA*12KBZW1 EUWA*16KBZW1 EUWA*20KBZW1 EUWA*24KBZW1 Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange.

  • Page 176: External Static Pressure: Euwy*5-24Kbzw1

    Pre-Test Run Checks ESIE11-02 External Static Pressure: EUWY*5-24KBZW1 External static The illustration below shows the external static pressure of the unit depending on the water flow. pressure ESP PH CO SP (kPa) 0,00 50,00 100,00 150,00 200,00 WF (l/min) 4–10 Part 4 –...
  • Page 177 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Static pressure of the unit Waterflow rate EUWY*5KBZW1 EUWY*8KBZW1 EUWY*10KBZW1 EUWY*12KBZW1 EUWY*16KBZW1 EUWY*20KBZW1 EUWY*24KBZW1 Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange.

  • Page 178: Static Pressure Of The Pump For Euwa*5-24Kbzw1 And Euwy*5-24Kbzw1

    Pre-Test Run Checks ESIE11-02 Static Pressure of the Pump for EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Static pressure The illustration below shows the static pressure of the pump depending on the water flow and the pump type. SP (kPa) SP Pump WF (l/min) 4–12 Part 4 –...
  • Page 179 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Static pressure of pump Waterflow rate CM3-3 CM5-3 CM10-2 CM5-4 CM10-3 Part 4 – Commissioning and Test Run 4–13...

  • Page 180: Water Pressure Drop Through Evaporator: Euwa*5-12Kbzw1

    Pre-Test Run Checks ESIE11-02 Water Pressure Drop through Evaporator: EUWA*5-12KBZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUWA*5-12KBZW1. drop 1000,00 100,00 10,00 1,00 1000 WFE [l/min] 4–14 Part 4 – Commissioning and Test Run...
  • Page 181 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Pressure drop through evaporator Evaporator waterflow rate For EUWA*5KBZW1 For EUWA*8KBZW1 For EUWA*10KBZW1 For EUWA*12KBZW1 Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange.

  • Page 182: Water Pressure Drop Through Evaporator: Euwa*16-24Kbzw1

    Pre-Test Run Checks ESIE11-02 Water Pressure Drop through Evaporator: EUWA*16-24KBZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUWA*16-24KBZW1. drop 100,00 10,00 1,00 1000 WFE [l/min] 4–16 Part 4 – Commissioning and Test Run...
  • Page 183 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Pressure drop through evaporator Evaporator waterflow rate For EUWA*16KBZW1 For EUWA*20KBZW1 For EUWA*24KBZW1 Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange.

  • Page 184: Water Pressure Drop Through Evaporator: Euwy*5-12Kbzw1

    Pre-Test Run Checks ESIE11-02 Water Pressure Drop through Evaporator: EUWY*5-12KBZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUWY*5-12KBZW1. drop 1000,00 100,00 10,00 1,00 1000 WFE [l/min] 4–18 Part 4 – Commissioning and Test Run...
  • Page 185 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Pressure drop through evaporator Evaporator waterflow rate For EUWY*5KBZW1 For EUWY*8KBZW1 EUWY*10KBZW1 - EUWY*12KBZW1 Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange.

  • Page 186: Water Pressure Drop Through Evaporator: Euwy*16-24Kbzw1

    Pre-Test Run Checks ESIE11-02 1.10 Water Pressure Drop through Evaporator: EUWY*16-24KBZW1 Water pressure The illustration below shows the water pressure drop through evaporator for EUWY*16-24KBZW1. drop 100,00 10,00 1,00 1000 WFE [l/min] 4–20 Part 4 – Commissioning and Test Run...
  • Page 187 ESIE11-02 Pre-Test Run Checks Symbols The table below describes the symbols. Symbol Description Pressure drop through evaporator Evaporator waterflow rate For EUWY*16KBZW1 EUWY*20KBZW1 - EUWY*24KBZW1 Selecting a flow outside the curves can cause damage to or malfunction of the unit. See also minimum and maximum allowed water flowrange.

  • Page 188: Electrical Checks

    Pre-Test Run Checks ESIE11-02 1.11 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 189: Control Of The Function Of The 4-Way Valve For Euwy*5-24Kbzw1

    ESIE11-02 Pre-Test Run Checks 1.12 Control of the function of the 4-way valve for EUWY*5-24KBZW1 Illustration The illustration below shows the main components of the 4-way valve and of the connections with the 4-way valve. Components The table below lists the main components of the 4-way valve and of the connections with the 4-way valve.
  • Page 190 Pre-Test Run Checks ESIE11-02 Normal heating The table below contains the normal condition of the 4-way valve in heating mode. Tube to the Tube to the Left pilot Right pilot Discharge Suction air-cooled plate heat back capil- back capil- tube 1 tube 2 heat exchanger...
  • Page 191 ESIE11-02 Pre-Test Run Checks Cause Procedure Cool Cool as Hot as in Temper- The pilot valve 1. De-energize the solenoid. column ature of works correctly. column valve There is dirt in 2. Raise the head pressure. body one bleed hole. 3.
  • Page 192 Pre-Test Run Checks ESIE11-02 The valve starts to Check the operation conditions in the table below to find the cause of the malfunction. shift but does not The procedure to solve the problem is described in the last column. complete the See the illustration to situate the numbers in the table heading.
  • Page 193 ESIE11-02 Pre-Test Run Checks The valve does not Check the operation conditions in the table below to find the cause of the malfunction. shift from heating to The procedure to solve the problem is described in the last column. cooling See the illustration to situate the numbers in the table heading.
  • Page 194 Pre-Test Run Checks ESIE11-02 Leak when in Check the operation conditions in the table below to find the cause of the malfunction. heating mode The procedure to solve the problem is described in the last column. See the illustration to situate the numbers in the table heading. Cause Procedure Cool...
  • Page 195 ESIE11-02 Test Run and Operation Data Part 4 Test Run and Operation Data What Is in This Chapter? Introduction The tables in this chapter contain an overview of the measurements that you can carry out. Use it as a guideline during commissioning. For the location of the measurement points, refer to the piping and wiring diagrams in Part 1.
  • Page 196 Test Run and Operation Data ESIE11-02 Test Run and Operation Data for EUWA*5-24KBZW1 and EUWY*5-24KBZW1 Pressures The table below contains the measurable pressures. Measurement Value Suction pressure 4 – 8.5 bar Discharge pressure 7 – 22 bar Maximum water pressure 10 bar Temperatures The table below contains the measurable temperatures.
  • Page 197 ESIE11-02 Test Run and Operation Data Unit Nominal current Maximum current Fuses EUWAP10KBZW1 17.3 A 20.3 A 3 x 32 gL/gG EUWAB10KBZW1 EUWAN12KBZW1 20.5 A 26.9 A 3 x 40 gL/gG EUWAP12KBZW1 21.9 A 28.3 A 3 x 40 gL/gG EUWAB12KBZW1 EUWAN16KBZW1 27.2 A...
  • Page 198 Test Run and Operation Data ESIE11-02 4–32 Part 4 – Commissioning and Test Run...
  • Page 199 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 units. It is also applicable on other types of Daikin chillers. What is in this part?
  • Page 200 ESIE11-02 5–2 Part 5 – Maintenance...
  • Page 201 ESIE11-02 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 202 Maintenance ESIE11-02 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 203 ESIE11-02 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 204 Maintenance ESIE11-02 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 205 ESIE11-02 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 206 Maintenance ESIE11-02 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, ■...
  • Page 207 ESIE11-02 Index 3 - 17 Checking the Digital Inputs and Outputs ............... Checking the Power Supply and Fuses 3 - 18 EUWA*5-24KBZW1 and EUWY*5-24KBZW1 .
  • Page 208 ESIE11-02 Head Pressure Control 2 - 11 EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ............. I/O PCB sensors 3 - 15 R3T and R4T for EUWA*5-24KBZW1 and EUWY*5-24KBZW1 .
  • Page 209 ESIE11-02 Safeties Overview 3 - 11 EUWA*5-24KBZW1 and EUWY*5-24KBZW1 ............. . Settings 2 - 32 Direct and User Parameters .
  • Page 210 ESIE11-02 Index...

This manual is also suitable for:

Euwy 10kbzw1 seriesEuwy 16kbzw1 seriesEuwy 5kbzw1 seriesEuwy 20kbzw1 seriesEuwy 8kbzw1 seriesEuwa 24kbzw1 series ... Show all

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