Fujitsu ASTG30KMTC - Compressor Frequency Control; Auto Changeover Operation

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CONTENTS

4. CONTROL AND FUNCTIONS

1. Compressor frequency control..................................................................04-1

1-1. Cooling operation ...........................................................................................................04-1

1-2. Heating operation ...........................................................................................................04-2

1-3. Dry operation..................................................................................................................04-3

1-4. Compressor frequency at normal start-up ......................................................................04-3

2. Auto changeover operation........................................................................04-6

3. Fan control...................................................................................................04-8

3-1. Indoor fan control............................................................................................................04-8

3-2. Outdoor fan control.......................................................................................................04-11

4. Louver control ...........................................................................................04-13

4-1. Vertical airflow direction louver control .........................................................................04-13

4-2. Horizontal airflow direction louver control .....................................................................04-13

4-3. Swing operation............................................................................................................04-14

5. Timer operation control ............................................................................04-15

5-1. Wireless remote control................................................................................................04-15

6. Defrost operation control .........................................................................04-17

6-1. Defrost operation in heating operation stopped ............................................................04-19

7. Various control..........................................................................................04-20

7-1. Auto restart...................................................................................................................04-20

7-2. Test operation control...................................................................................................04-20

7-3. MANUAL AUTO operation............................................................................................04-20

7-4. Forced cooling operation ..............................................................................................04-21

7-5. 10 °C HEAT operation..................................................................................................04-21

7-6. ECONOMY operation ...................................................................................................04-21

7-7. POWERFUL operation .................................................................................................04-21

7-8. Compressor preheating ................................................................................................04-22

7-9. Electronic expansion valve control ...............................................................................04-22

7-10. Prevention to restart for 3 minutes (3 minutes st) .......................................................04-22

7-11. 4-way valve control.....................................................................................................04-23

7-12. Demand response operation ......................................................................................04-23

7-13. Human sensor for energy saving................................................................................04-24

7-14. Peak cut operation (for 34 model) ..............................................................................04-25

7-15. Outdoor unit low noise operation (for 34 model).........................................................04-25

8. Various protections...................................................................................04-26

8-1. Discharge gas temperature over-rise prevention control ..............................................04-26

8-2. Anti-freezing control (cooling and dry mode) ................................................................04-26

8-3. Current release control .................................................................................................04-26

8-4. Cooling pressure over-rise protection...........................................................................04-27

8-5. Compressor temperature protection .............................................................................04-28

8-6. High pressure protection ..............................................................................................04-28

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