Daikin RZQ71B7V3B [5/353] Part 2 functional description

ESIE04-01

iv Table of Contents

Part 2

Functional Description

1 General Functionality

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

1.2 Functions of Thermistors ......................................................................... 2–4

1.3 Forced Operating Mode (Emergency Operation)..................................... 2–6

1.4 Outdoor Unit Identification Function ........................................................ 2–8

1.5 Simulated Operation Function ................................................................. 2–9

1.6 Restart Standby....................................................................................... 2–10

1.7 Automatic Restart .................................................................................... 2–11

1.8 Using Conditions for Remote Control Thermostat................................... 2–12

1.9 Forced Thermostat OFF .......................................................................... 2–13

1.10 Test run control ....................................................................................... 2–14

1.11 4-way Valve Control................................................................................. 2–15

1.12 Pump Down Residual Operation ............................................................ 2–16

1.13 Pump Down Operation ........................................................................... 2–17

1.14 Defrost Operation ................................................................................... 2–18

1.15 Freeze Prevention Function..................................................................... 2–20

1.16 PMV Control ........................................................................................... 2–21

1.17 Preheating Operation Control .................................................................. 2–22

1.18 Crankcase Heater Control ...................................................................... 2–23

2 Indoor Unit Functional Concept

2.1 What Is in This Chapter? ......................................................................... 2–25

2.2 Thermostat Control ................................................................................. 2–26

2.3 Drain Pump Control ................................................................................ 2–27

2.4 Condensation Avoidance Control ........................................................... 2–29

2.5 Draft Avoidance Control 1........................................................................ 2–30

2.6 Draft Avoidance Control 2........................................................................ 2–31

2.7 Fan and Flap Operations ........................................................................ 2–32

2.8 Indoor unit fan control ............................................................................. 2–33

3 Outdoor Unit Functional Concept

3.1 What Is in This Chapter? ......................................................................... 2–35

3.2 Function Outline....................................................................................... 2–36

3.3 Frequency Regulating Functions ............................................................ 2–39

3.4 Expansion Valve Regulating Functions .................................................. 2–55

3.5 Outdoor Unit Fan Speed Control ............................................................ 2–59