1 Introduction
1.1 About This Manual
Part 1
System Outline
1 General Outline: Mini-chiller
1.1 What Is in This Chapter?
1.2 EWA(Y)Q005~007A*V3: Outlook and Dimensions
1.3 EWA(Y)Q005~007A*V3: Installation and Service Space
2 Specifications
2.1 What Is in This Chapter?
2.2 EWA(Y)Q005~007A*V3
3 Functional Diagrams
3.1 What Is in This Chapter?
3.2 Pipe Connection Diameters
4 Piping Diagrams
4.1 What Is in This Chapter?
4.2 EWA(Y)Q005~007A*V3
5 Switch Box Layout
5.1 What Is in This Chapter?
5.2 EWA(Y)Q005~007A*V3 (Outdoor)
5.3 EWA(Y)Q005~007A*V3 (Hydro-kit)
6 Wiring Diagrams
6.1 What Is in This Chapter?
6.2 EWA(Y)Q005~007A*V3
7 PCB Layout
7.1 What Is in This Chapter?
7.2 EWA(Y)Q005~007A*V3 (Outdoor)
7.3 EWA(Y)Q005~007A*V3 (Hydro-kit)
Part 2
Functional Description
1 General Functionality
1.1 What Is in This Chapter?
1.2 Preheating Operation
1.3 Four Way Valve Switching
1.4 Freeze-up Protection Control
2 Hydro-kit Functional Concept
2.1 What Is in This Chapter?
2.2 Defrost Control
2.3 Forced Operation Model
3 Outdoor Unit Functional Concept
3.1 What Is in This Chapter?
3.2 Frequency Principle
3.3 Frequency Control
3.4 Controls at Mode Changing / Start-up
3.5 Discharge Pipe Temperature Control
3.6 Input Current Control
3.7 Heating Peak-cut Control
3.8 Fan Control
3.9 Liquid Compression Protection Function 2
3.10 Low Hz High Pressure Limit
3.11 Electronic Expansion Valve Controll
3.12 Malfunctions
Part 3
Troubleshooting
1 Troubleshooting
1.1 What Is in This Chapter?
1.2 Procedure of Self-Diagnosis by Remote Controller
1.3 Fault-diagnosis by Remote Controller
1.4 Overview of Error Codes
2 Error Codes: Hydro-kit
2.1 What Is in This Chapter?
2.2 “A1” Hydro-kit PCB Abnormality
2.3 “A5” Freeze-up Protection Control or High Pressure Control
2.4 “C4, 81, 80” Thermistor or Related Abnormality (Hydro-kit)
3 Error Codes: Outdoor Units
3.1 What Is in This Chapter?
3.2 “E1” Outdoor Unit PCB Abnormality
3.3 “E5” OL Activation (Compressor Overload)
3.4 “E6” Compressor Lock
3.5 “E7” DC Fan Lock
3.6 “E8” Input Over Current Detection
3.7 “EA” Four Way Valve Abnormality
3.8 “F3” Discharge Pipe Temperature Control
3.9 “F6” High Pressure Control in Cooling
3.10 “H0” Compressor Sensor System Abnormality
3.11 “H6” Compressor Startup Failure
3.12 “H8” CT or Related Abnormality
3.13 “P4, J3, J6, H9” Thermistor or Related Abnormality (Outdoor Unit)
3.14 “L3” Switch Box Temperature Rise
3.15 “L4” Radiation Fin Temperature Rise
3.16 “L5” Output Over Current Detection
4 Error Codes: System Malfunctions
4.1 What Is in This Chapter?
4.2 “U0” Insufficient Gas
4.3 “U2” Low-voltage Detection or Over-voltage Detection
4.4 “U4” Signal Transmission Error (between Hydro-kit and Outdoor Units)
4.5 “U7” Malfunction of Transmission between Remote Controller and Control box
5 Additional Checks for Troubleshooting
5.1 What Is in This Chapter?
5.2 Fan Motor Connector Output Check
5.3 Electronic Expansion Valve Check
5.4 Four Way Valve Performance Check
5.5 Thermistor Resistance Check
5.6 Installation Condition Check
5.7 Discharge Pressure Check
5.8 Outdoor Unit Fan System Check (With DC Motor)
5.9 Power Supply Waveforms Check
5.10 Inverter Units Refrigerant System Check
5.11 Capacitor Voltage Check
5.12 Power Transistor Check
5.13 Main Circuit Electrolytic Capacitor Check
5.14 Turning Speed Pulse Input on the Outdoor Unit PCB Check
5.15 “Inverter Checker” Check
Part 4
Commissioning and Test Run
1 Pre-Test Run Checks
1.1 What Is in This Chapter?
1.2 Test Run Checks for Water Pipework
1.3 General Test Run Checks
2 Field settings
2.1 What Is in This Chapter?
2.2 How to Change the Field Settings with the Wired Remote Controller
2.3 Overview of the Field Settings by Remote Control
2.4 Field Setting by Dip Switches from Hydro-kit
3 Operation Range and Test Operation
3.1 Operation Range
3.2 Test Operation
3.3 External Static Pressure Chart
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