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CONTENTS

1. 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 ......................................................................04-4

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.......................................................................................................04-12

4. Louver control ...........................................................................................04-14

4-1. Individual louver control................................................................................................04-14

4-2. All louver control ...........................................................................................................04-14

4-3. Swing operation............................................................................................................04-15

5. Timer operation control ............................................................................04-16

5-1. Wireless remote control................................................................................................04-16

5-2. Wired remote control ....................................................................................................04-18

6. Defrost operation control .........................................................................04-21

6-1. Defrost operation in heating operation stopped ............................................................04-22

7. Various control..........................................................................................04-23

7-1. Auto restart...................................................................................................................04-23

7-2. 10 °C HEAT operation ..................................................................................................04-23

7-3. ECONOMY operation ...................................................................................................04-23

7-4. POWERFUL operation .................................................................................................04-24

7-5. Fresh air control............................................................................................................04-24

7-6. Compressor preheating ................................................................................................04-24

7-7. External electrical heater control ..................................................................................04-25

7-8. Electronic expansion valve control ...............................................................................04-25

7-9. Drain pump control .......................................................................................................04-26

7-10. Prevention to restart for 3 minutes (3 minutes st) .......................................................04-28

7-11. 4-way valve control.....................................................................................................04-28

7-12. Human sensor for energy saving................................................................................04-28

8. Various protections...................................................................................04-29

8-1. Discharge gas temperature over-rise prevention control ..............................................04-29

8-2. Anti-freezing control (cooling and dry mode) ................................................................04-29

8-3. Current release control .................................................................................................04-30

8-4. Indoor unit fan motor over temperature protection........................................................04-30

8-5. Compressor temperature protection ............................................................................04-31

8-6. High pressure protection ..............................................................................................04-31

8-7. Low outdoor temperature protection.............................................................................04-31

Brand	Fujitsu
Model	AO G18KATA Series
Category	Air Conditioner
Language	English

Fujitsu AO G18KATA Series Service Instruction

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