Daikin RZQ125B7W1B [5/326] Indoor unit functional concept

ESIE05-03

Table of Contents iii

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 Controller Thermostat .............................. 2–12

1.9 Forced Thermostat OFF ......................................................................... 2–14

1.10 Test Run Control .................................................................................... 2–15

1.11 4-way Valve Control................................................................................ 2–16

1.12 Pump Down Residual Operation ............................................................ 2–17

1.13 Pump Down Operation ........................................................................... 2–18

1.14 Defrost Operation ................................................................................... 2–19

1.15 Freeze Prevention Function.................................................................... 2–22

1.16 PMV Control ........................................................................................... 2–23

1.17 Preheating Operation Control ................................................................. 2–24

1.18 Crankcase Heater Control ..................................................................... 2–25

2 Indoor Unit Functional Concept

2.1 What Is in This Chapter? ........................................................................ 2–27

2.2 Thermostat Control ................................................................................ 2–28

2.3 Drain Pump Control ............................................................................... 2–29

2.4 Condensation Avoidance Control .......................................................... 2–31

2.5 Draft Avoidance Control 1....................................................................... 2–32

2.6 Draft Avoidance Control 2....................................................................... 2–33

2.7 Fan and Flap Operations ....................................................................... 2–34

2.8 Indoor Unit Fan Control .......................................................................... 2–35

3 Outdoor Unit Functional Concept

3.1 What Is in This Chapter? ........................................................................ 2–37

3.2 Function Outline...................................................................................... 2–38

3.3 Frequency Regulating Functions ........................................................... 2–41

3.4 Expansion Valve Regulating Functions ................................................. 2–58

3.5 Outdoor Unit Fan Speed Control ........................................................... 2–62

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