Service manual

SiENBE12-522A
Function and Control 81
Part 4
Function and Control
1. Main Functions......................................................................................82
1.1 Frequency Principle................................................................................82
1.2 Power-Airflow Dual Flaps, Wide Angle Louvers and Auto-Swing ..........84
1.3 Fan Speed Control for Indoor Units........................................................85
1.4 Programme Dry Function .......................................................................86
1.5 Automatic Operation...............................................................................87
1.6 Thermostat Control.................................................................................88
1.7 Night Set Mode.......................................................................................89
1.8 ECONO Mode ........................................................................................90
1.9 INTELLIGENT EYE ................................................................................91
1.10 HOME LEAVE Operation .......................................................................93
1.11 Inverter POWERFUL Operation .............................................................94
1.12 Other Functions......................................................................................95
2. Function of Main Structural Parts..........................................................97
2.1 Main Structural Parts..............................................................................97
2.2 Function of Thermistor ...........................................................................98
3. Control Specification ...........................................................................102
3.1 Mode Hierarchy ....................................................................................102
3.2 Frequency Control................................................................................103
3.3 Controls at Mode Changing / Start-up..................................................105
3.4 Discharge Pipe Control ........................................................................106
3.5 Input Current Control............................................................................106
3.6 Freeze-up Protection Control ...............................................................107
3.7 Heating Peak-cut Control .....................................................................107
3.8 Fan Control...........................................................................................108
3.9 Liquid Compression Protection Function 2...........................................108
3.10 Defrost Control .....................................................................................109
3.11 Low Hz High Pressure Limit .................................................................110
3.12 Electronic Expansion Valve Control .....................................................110
3.13 Malfunctions .........................................................................................114
3.14 Forced Operation Mode .......................................................................115
3.15 Wiring-Error Check...............................................................................116
3.16 Additional Function...............................................................................118