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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..................................................................................................................04-2

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

1-5. Compressor frequency limitation by outdoor temperature ..............................................04-5

2. Auto changeover operation........................................................................04-7

3. Fan control...................................................................................................04-9

3-1. Indoor fan control............................................................................................................04-9

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

4. Timer operation control ............................................................................04-13

4-1. →ireless remote control................................................................................................04-13

4-2. →ired remote control ....................................................................................................04-15

5. Defrost operation control .........................................................................04-18

5-1. Defrost operation in heating operation stopped ............................................................04-19

6. Various control..........................................................................................04-20

6-1. Auto restart...................................................................................................................04-20

6-2. 10 °C HEAT operation..................................................................................................04-20

6-3. ECONOMY operation ...................................................................................................04-20

6-4. Fresh air control............................................................................................................04-20

6-5. Compressor preheating ................................................................................................04-21

6-6. External electrical heater control ..................................................................................04-21

6-7. Electronic expansion valve control ...............................................................................04-21

6-8. Drain pump control .......................................................................................................04-22

6-9. Prevention to restart for 3 minutes (3 minutes st) .........................................................04-25

6-10. 4-way valve control.....................................................................................................04-25

6-11. Peak cut operation .....................................................................................................04-25

7. Various protections...................................................................................04-26

7-1. Discharge gas temperature over-rise prevention control ..............................................04-26

7-2. Anti-freezing control (cooling and dry mode) ................................................................04-26

7-3. Current release control .................................................................................................04-27

7-4. Indoor unit fan motor over temperature protection........................................................04-28

7-5. Compressor temperature protection ............................................................................04-28

7-6. High pressure protection ..............................................................................................04-28

7-7. Low outdoor temperature protection.............................................................................04-28

7-8. High temperature and high pressure release control....................................................04-29

Fujitsu ARXG45KMLA User Manual

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