Service manual

SiBE05-722_C
24 Function and Control
Part 4
Function and Control
1. Main Functions......................................................................................25
1.1 Temperature Control ..............................................................................25
1.2 Frequency Principle................................................................................25
1.3 Airflow Direction Control.........................................................................27
1.4 Fan Speed Control for Indoor Unit .........................................................27
1.5 Program Dry Operation ..........................................................................28
1.6 Automatic Operation...............................................................................29
1.7 Thermostat Control.................................................................................30
1.8 NIGHT SET Mode ..................................................................................31
1.9 HOME LEAVE Operation .......................................................................32
1.10 Inverter POWERFUL Operation .............................................................33
1.11 Clock Setting ..........................................................................................34
1.12 Other Functions......................................................................................35
2. Function of Thermistor ..........................................................................36
3. Control Specification .............................................................................37
3.1 Mode Hierarchy ......................................................................................37
3.2 Frequency Control..................................................................................38
3.3 Controls at Mode Changing / Start-up....................................................40
3.4 Discharge Pipe Temperature Control.....................................................42
3.5 Input Current Control..............................................................................43
3.6 Freeze-up Protection Control .................................................................44
3.7 Heating Peak-cut Control .......................................................................44
3.8 Outdoor Fan Control...............................................................................45
3.9 Liquid Compression Protection Function................................................45
3.10 Defrost Control .......................................................................................46
3.11 Electronic Expansion Valve Control .......................................................47
3.12 Malfunctions ...........................................................................................50