Daikin FUYP125BV1 [7/397] General functionality

ESiEN02–01A

Table of Contents v

Part 2

Functional Description

1 General Functionality

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

1.2 Functions of Thermistors: Small Heat Pumps......................................... 2–4

1.3 Functions of Thermistors: Large Heat Pumps ........................................ 2–5

1.4 Operating Modes and Control Modes ..................................................... 2–7

1.5 Forced Operating Mode (Emergency Operation).................................... 2–8

1.6 Switching to Forced Operating Mode (Emergency Operation) ............... 2–10

1.7 Thermostat Control ................................................................................. 2–11

1.8 Forced Thermostat OFF ......................................................................... 2–13

1.9 HPS and LPS Function ........................................................................... 2–14

1.10 Simulated Operation Function ................................................................ 2–15

1.11 Discharge Pipe Temperature Control ..................................................... 2–16

1.12 Gas Shortage Function ........................................................................... 2–17

1.13 Crankcase Heater Control (R(Y)P200-250B Only) ................................. 2–18

1.14 Drain Pump Control ................................................................................ 2–19

1.15 Fan and Flap Operations ........................................................................ 2–21

1.16 Auto-Restart Function ............................................................................. 2–22

1.17 Using Conditions for Remote Control Thermostat .................................. 2–23

2 Overview of the cooling mode functions

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

2.2 Dry Keep Mode ....................................................................................... 2–26

2.3 Freeze-Up Function in Cooling or Dry Keep ........................................... 2–27

2.4 Outdoor Fan Starting Control in Cooling or Dry Keep Mode................... 2–30

2.5 Normal Outdoor Fan Control in Cooling Operation................................. 2–32

2.6 Low Outside Temperature Control in Cooling Operation

(Year Round Cooling) ............................................................................. 2–33

2.7 High Pressure Protection Control in Cooling Operation.......................... 2–34

2.8 Condensation Avoidance Control ........................................................... 2–35

3 Overview of the heating mode functions

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

3.2 Defrost Control........................................................................................ 2–38

3.3 Draft Avoidance Control 1....................................................................... 2–41

3.4 Draft Avoidance Control 2....................................................................... 2–43

3.5 Outdoor Unit Identification Function........................................................ 2–44

3.6 4-way Valve Control................................................................................ 2–45

3.7 Starting Outdoor Fan Control in Heating Mode....................................... 2–46

3.8 Normal Outdoor Fan Control in Heating Mode ....................................... 2–47

3.9 Motor Operated Valve Control ................................................................ 2–49