Service Manual

SiUS071735E
Functions and Control 14
Part 4
Functions and Control
1. Main Functions..........................................................................................15
1.1 Temperature Control .................................................................................. 15
1.2 Frequency Principle.................................................................................... 15
1.3 Fan Speed Control for Indoor Unit ............................................................. 17
1.4 Program Dry Operation .............................................................................. 18
1.5 Clock and Calendar Setting
(With Wired Remote Controller BRC1E73) ................................................ 19
1.6 Schedule TIMER Operation
(With Wired Remote Controller BRC1E73) ................................................ 21
1.7 Drain Pump Control.................................................................................... 24
1.8 Hot Start Control (In Heating Operation Only)............................................ 26
1.9 Other Functions.......................................................................................... 27
2. Control Specification .................................................................................28
2.1 Mode Hierarchy .......................................................................................... 28
2.2 Frequency Control...................................................................................... 29
2.3 Controls at Mode Changing/Start-up.......................................................... 31
2.4 Discharge Pipe Temperature Control......................................................... 33
2.5 Input Current Control.................................................................................. 34
2.6 Freeze-up Protection Control ..................................................................... 35
2.7 Heating Peak-cut Control ........................................................................... 36
2.8 Outdoor Fan Control................................................................................... 37
2.9 Liquid Compression Protection Function.................................................... 37
2.10 Defrost Control ........................................................................................... 38
2.11 Electronic Expansion Valve Control ........................................................... 39
2.12 Malfunctions ............................................................................................... 42