SiUS281811EA
Part 4 Functions and Control 103
1. Operation Mode ......................................................................................104
2. Basic Control...........................................................................................105
2.1 Normal Operation ..................................................................................... 105
2.2 Compressor PI Control............................................................................. 106
2.3 Electronic Expansion Valve PI Control..................................................... 108
2.4 Cooling Operation Fan Control................................................................. 109
3. Special Control........................................................................................110
3.1 Startup Control ......................................................................................... 110
3.2 Oil Return Control..................................................................................... 112
3.3 Defrost Control ......................................................................................... 114
3.4 Pump Down Residual Control .................................................................. 115
3.5 Restart Standby........................................................................................ 116
3.6 Stop Control ............................................................................................. 116
4. Protection Control ...................................................................................117
4.1 High Pressure Protection Control............................................................. 117
4.2 Low Pressure Protection Control.............................................................. 118
4.3 Discharge Pipe Temperature Protection Control...................................... 120
4.4 Inverter Protection Control ....................................................................... 121
5. Other Control...........................................................................................123
5.1 Demand Operation ................................................................................... 123
5.2 Heating Operation Prohibition .................................................................. 123
6. Outline of Control (Indoor Unit) ...............................................................124
6.1 Remote Controller Thermistor .................................................................. 124
6.2 Thermostat Control................................................................................... 126
6.3 Thermostat Control with Operation Mode Set to AUTO ........................... 128
6.4 List of Swing Flap Operations .................................................................. 129
6.5 Hot Start Control (In Heating Operation Only).......................................... 130
6.6 Louver Control for Preventing Ceiling Dirt (FCQ Models Only)................ 131
6.7 Drain Pump Control.................................................................................. 132
6.8 Freeze-Up Prevention .............................................................................. 134
6.9 Heater Control (Except FTQ-TA Models) ................................................. 136
6.10 Heater Control (FTQ-TA Models) ............................................................. 137
6.11 3-Step Thermostat Processing (FTQ-TA Models).................................... 141
6.12 Fan Control (Heater Residual) (FTQ-TA Models) .................................... 142
6.13 Interlocked with External Equipment (FTQ-TA Models) ........................... 142
Part 4
Functions and Control
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