Daikin EWAQ005AAV3P [4/170] Part 2 functional description

ESIE06-04

ii Table of Contents

6 Wiring Diagrams

6.1 What Is in This Chapter? ......................................................................... 1–23

6.2 EWA(Y)Q005~007A*V3........................................................................... 1–24

7 PCB Layout

7.1 What Is in This Chapter? ......................................................................... 1–27

7.2 EWA(Y)Q005~007A*V3 (Outdoor) .......................................................... 1–28

7.3 EWA(Y)Q005~007A*V3 (Hydro-kit) ......................................................... 1–32

Part 2

Functional Description

1 General Functionality

1.1 What Is in This Chapter? ......................................................................... 2–3

1.2 Preheating Operation............................................................................... 2–4

1.3 Four Way Valve Switching....................................................................... 2–5

1.4 Freeze-up Protection Control................................................................... 2–6

2 Hydro-kit Functional Concept

2.1 What Is in This Chapter? ......................................................................... 2–7

2.2 Defrost Control ........................................................................................ 2–8

2.3 Forced Operation Model .......................................................................... 2–9

3 Outdoor Unit Functional Concept

3.1 What Is in This Chapter? ......................................................................... 2–11

3.2 Frequency Principle ................................................................................. 2–12

3.3 Frequency Control ................................................................................... 2–14

3.4 Controls at Mode Changing / Start-up ..................................................... 2–16

3.5 Discharge Pipe Temperature Control ...................................................... 2–17

3.6 Input Current Control ............................................................................... 2–18

3.7 Heating Peak-cut Control......................................................................... 2–19

3.8 Fan Control .............................................................................................. 2–20

3.9 Liquid Compression Protection Function 2 .............................................. 2–21

3.10 Low Hz High Pressure Limit .................................................................... 2–22

3.11 Electronic Expansion Valve Controll........................................................ 2–23

3.12 Malfunctions............................................................................................. 2–27