Daikin RTSQ20PY1 Service Manual page 3

SiBE31-801_C
4. Rotation Control ....................................................................................86
5. Startup Control ......................................................................................87
6. Normal Operation..................................................................................90
7. Protection Control .................................................................................98
8. Special Control....................................................................................105
9. Outline of Control (Indoor Unit) ...........................................................114
Part 5 Test Operation ............................................................... 128
1. Test Operation ....................................................................................129
2. Outdoor Unit PCB Layout....................................................................147
3. Field Setting ........................................................................................148
Table of Contents
3.2 Crankcase Heater Control......................................................................85
4.1 Rotation of Outdoor Units.......................................................................86
4.2 Operating Priority and Rotation of Compressors....................................86
5.1 Startup Control in Cooling Operation .....................................................87
5.2 Startup Control in Heating Operation .....................................................88
5.3 Startup Control of Function Unit
(only for heating operation at low outdoor air temperature) ...................89
6.1 List of Functions in Normal Operation ....................................................90
6.2 Compressor Control ...............................................................................91
6.3 Electronic Expansion Valve PI Control...................................................94
6.4 Outdoor Unit Fan Control .......................................................................95
6.5 Control for Cooling Operation at Low Outdoor Air Temperature ............95
6.6 Control for Heating Operation at Low Outdoor Air Temperature............96
6.7 Refrigerant Flow Rate Control................................................................97
7.1 High Pressure Protection Control...........................................................98
7.2 Low Pressure Protection Control..........................................................100
7.3 Discharge Pipe Protection Control .......................................................102
7.4 Inverter Protection Control ...................................................................103
7.5 STD Compressor Overload Protection.................................................104
7.6 Cooling Fan Control for
Radiation Fin Temperature of Function Unit ........................................104
7.7 Heater Control for Function Unit Switch Box........................................104
8.1 Pump down Residual Operation...........................................................105
8.2 Oil Return Operation ............................................................................107
8.3 Defrost Operation .................................................................................111
8.4 Emergency Operation ..........................................................................113
9.1 Operation Flow Chart ...........................................................................114
9.2 Thermostat Control...............................................................................116
9.3 Drain Pump Control..............................................................................121
9.4 Freeze Prevention ................................................................................124
9.5 Heater Control (Optional PCB KRP1B...is required.) ...........................125
9.6 List of Swing Flap Operations ..............................................................126
9.7 Control of Electronic Expansion Valve .................................................127
1.1 Installation Process ..............................................................................129
1.2 Procedure and Outline .........................................................................130
1.3 Additional Refrigerant Charge Procedure ............................................134
1.4 Check Operation ..................................................................................144
1.5 Check in Normal Operation ..................................................................146
3.1 Field Setting from Remote Controller ...................................................148
3.2 Field Setting from Outdoor Unit............................................................166
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