Daikin FXYBP20K7V1, Service Manual

Page: 42 / 193

SiE 00-07
Function R-407C PLUS Seires 31
Part 3
Function
R-407C PLUS Series
1. Outdoor Unit Refrigerant System Diagram ...........................................30
1.1 Outdoor Unit Refrigerant System Diagram............................................ 30
1.2 Flow of Refrigerant in Each Operating Mode ........................................ 33
2. List of Safty Device and Function Parts Setting Value..........................37
2.1 Outdoor Unit .......................................................................................... 37
2.2 Indoor Unit ............................................................................................. 38
3. Outline of Control (Outdoor Unit) ..........................................................41
3.1 Compressor PI Control .......................................................................... 41
3.2 Motorized Valve PI Control.................................................................... 42
3.3 Defrost Control ...................................................................................... 43
3.4 Low Outside Temperature Cooling Control ........................................... 45
3.5 Compressor Capacity Control ............................................................... 47
3.6 Demand Control .................................................................................... 49
3.7 Restart Standby..................................................................................... 50
3.8 Startup Control ...................................................................................... 51
3.9 Oil Equalization Operation..................................................................... 52
3.10 Oil Return Operation.............................................................................. 53
3.11 Low Pressure Protection Control........................................................... 56
3.12 High Pressure Protection Control .......................................................... 57
3.13 Discharge Pipe Temperature Control .................................................... 59
3.14 Inverter Protection Control..................................................................... 61
3.15 Crankcase Heater Control ..................................................................... 62
3.16 Gas Shortage Warning .......................................................................... 63
3.17 Heating Pump-Down Residual Operation.............................................. 64
3.18 Backup Operation.................................................................................. 65
3.19 Fan Location and Fan Tap .................................................................... 66
4. Outline of Control (Indoor Unit) .............................................................67
4.1 Drain Pump Control ............................................................................... 67
4.2 Louver Control for Preventing Ceiling Dirt ............................................. 69
4.3 Thermostat Sensor in Remote Controller .............................................. 70
4.4 Freeze Prevention ................................................................................. 72