Daikin REYQ14PY1B [114/477] Function general 04

SiBE37-701_B

103 Function

Part 4

Function

1. Function General.................................................................................104

1.1 Symbol .................................................................................................104

1.2 Operation Mode....................................................................................106

2. Basic Control.......................................................................................107

2.1 Normal Operation .................................................................................107

2.2 Compressor PI Control.........................................................................108

2.3 Electronic Expansion Valve PI Control.................................................116

2.4 Step Control of Outdoor Unit Fans .......................................................116

2.5 Outdoor Unit Fan Control in Cooling Operation ...................................117

2.6 Heat Exchanger Control .......................................................................118

3. Special Control....................................................................................119

3.1 Startup Control .....................................................................................119

3.2 Large Capacity Start Up Control (Heating)...........................................121

3.3 Oil Return Operation ............................................................................122

3.4 Defrost Operation .................................................................................126

3.5 Pump down Residual Operation...........................................................128

3.6 Standby ................................................................................................130

3.7 Stopping Operation ..............................................................................131

4. Protection Control ...............................................................................132

4.1 High Pressure Protection Control.........................................................132

4.2 Low Pressure Protection Control..........................................................134

4.3 Discharge Pipe Protection Control .......................................................136

4.4 Inverter Protection Control ...................................................................137

4.5 STD Compressor Overload Protection.................................................139

5. Other Control.......................................................................................140

5.1 Backup Operation.................................................................................140

5.2 Demand Operation ...............................................................................140

5.3 Heating Operation Prohibition ..............................................................140

6. Outline of Control (Indoor Unit) ...........................................................141

6.1 Operation Flow Chart ...........................................................................141

6.2 Thermostat Control...............................................................................143

6.3 Drain Pump Control..............................................................................147

6.4 Control of Electronic Expansion Valve .................................................149

6.5 Freeze Prevention ................................................................................150

6.6 Heater Control (Optional PCB KRP1B...is required.) ...........................151

6.7 List of Swing Flap Operations ..............................................................152

6.8 Hot Start Control (In Heating Operation Only)......................................153

6.9 Louver Control for Preventing Ceiling Dirt............................................154