Service manual

SiBE05-722ED
Table of Contents ii
1. Safety Cautions.......................................................................................v
1.1 Warnings and Cautions Regarding Safety of Workers.............................v
1.2 Warnings and Cautions Regarding Safety of Users............................... vii
2. Used Icons ..............................................................................................x
Part 1 List of Functions ................................................................ 1
1. Functions.................................................................................................2
Part 2 Specifications .................................................................... 7
1. Specifications ..........................................................................................8
1.1 Cooling Only.............................................................................................8
1.2 Heat Pump .............................................................................................11
Part 3 Printed Circuit Board Connector Wiring Diagram ........... 17
1. Indoor Unit.............................................................................................18
2. Outdoor Unit..........................................................................................20
2.1 RK(X)S25/35E2V1B ...............................................................................20
2.2 RK(X)S25/35G2V1B...............................................................................22
2.3 RK(X)S25/35G2V1B9, RXS25/35J2V1B, RXS25K3V1B,
RXS35K2V1B, RXS35L2V1B.................................................................24
Part 4 Function and Control........................................................ 26
1. Main Functions......................................................................................27
1.1 Temperature Control ..............................................................................27
1.2 Frequency Principle................................................................................27
1.3 Airflow Direction Control.........................................................................29
1.4 Fan Speed Control for Indoor Unit .........................................................29
1.5 Program Dry Operation ..........................................................................30
1.6 Automatic Operation...............................................................................31
1.7 Thermostat Control.................................................................................32
1.8 NIGHT SET Mode ..................................................................................33
1.9 HOME LEAVE Operation .......................................................................34
1.10 Inverter POWERFUL Operation .............................................................35
1.11 Clock Setting ..........................................................................................36
1.12 Other Functions......................................................................................37
2. Function of Thermistor ..........................................................................38
3. Control Specification .............................................................................39
3.1 Mode Hierarchy ......................................................................................39
3.2 Frequency Control..................................................................................40
3.3 Controls at Mode Changing / Start-up....................................................42
3.4 Discharge Pipe Temperature Control.....................................................44
3.5 Input Current Control..............................................................................45
3.6 Freeze-up Protection Control .................................................................46
3.7 Heating Peak-cut Control .......................................................................46
3.8 Outdoor Fan Control...............................................................................47
3.9 Liquid Compression Protection Function................................................47
3.10 Defrost Control .......................................................................................48