SiBE611027_A
Table of Contents ii
1. Introduction ............................................................................................ iv
1.1 Safety Cautions ....................................................................................... iv
1.2 Used Icons ............................................................................................ viii
Part 1 List of Functions ................................................................ 1
1. Functions.................................................................................................2
Part 2 Specifications .................................................................... 3
1. Specifications ..........................................................................................4
Part 3 Printed Circuit Board Connector Wiring Diagram ............. 5
1. Printed Circuit Board Connector Wiring Diagram....................................6
Part 4 Function and Control.......................................................... 8
1. Temperature Control ...............................................................................9
2. Airflow Direction Control........................................................................10
3. Fan Speed Control ................................................................................11
4. Thermostat Control ...............................................................................12
5. POWERFUL Operation .........................................................................13
6. Interlinked Control with “Altherma”........................................................14
7. Water Valve Control ..............................................................................15
8. Other Functions.....................................................................................16
8.1 Signal Receiving Sign ............................................................................16
8.2 Indoor Unit ON/OFF Button....................................................................16
8.3 Titanium Apatite Photocatalytic Air-Purifying Filter ................................16
8.4 Auto-restart Function..............................................................................16
8.5 WEEKLY TIMER Operation ...................................................................16
Part 5 Operation Manual ............................................................. 17
1. System Configuration............................................................................18
2. Operation Manual..................................................................................19
2.1 Names of Parts.......................................................................................19
2.2 COOL · HEAT · FAN Operation..............................................................22
2.3 Adjusting the Airflow Direction................................................................24
2.4 POWERFUL Operation ..........................................................................26
2.5 FORCED QUIET Operation ...................................................................27
2.6 OFF TIMER Operation ...........................................................................28
2.7 ON TIMER Operation .............................................................................29
2.8 WEEKLY TIMER Operation ...................................................................30
Part 6 Service Diagnosis............................................................. 38
1. Troubleshooting with LED .....................................................................39
2. Problem Symptoms and Measures.......................................................40
3. Service Check Function ........................................................................41
3.1 ARC452 Series.......................................................................................41
4. Troubleshooting ....................................................................................44
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