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CONTENTS

4. CONTROL AND FUNCTIONS

1. Rotation number control of compressor...................................................04-1

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

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

1-3. Dry operation..................................................................................................................04-2

1-4. Rotation number of compressor at normal start-up ........................................................04-3

1-5. Rotation number of compressor limitation by outdoor temperature ................................04-4

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

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

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

3-2. Outdoor fan control.......................................................................................................04-10

4. Timer operation control ............................................................................04-11

4-1. →ireless remote control................................................................................................04-11

4-2. →ired remote control ....................................................................................................04-13

5. Defrost operation control .........................................................................04-16

5-1. Defrost operation in heating operation stopped ............................................................04-17

6. Various control..........................................................................................04-18

6-1. Auto restart...................................................................................................................04-18

6-2. 10 °C HEAT operation..................................................................................................04-18

6-3. ECONOMY operation ...................................................................................................04-18

6-4. Fresh air control............................................................................................................04-18

6-5. Compressor preheating ................................................................................................04-19

6-6. External electrical heater control ..................................................................................04-19

6-7. Electronic expansion valve control ...............................................................................04-19

6-8. Drain pump control .......................................................................................................04-20

6-9. Prevention to restart for 3 minutes (3 minutes st) .........................................................04-21

6-10. 4-way valve control.....................................................................................................04-21

6-11. Peak cut operation .....................................................................................................04-21

6-12. Outdoor unit low noise operation ................................................................................04-22

7. Various protections...................................................................................04-23

7-1. Discharge gas temperature over-rise prevention control ..............................................04-23

7-2. Anti-freezing control (cooling and dry mode) ................................................................04-23

7-3. Current release control .................................................................................................04-24

7-4. Compressor temperature protection ............................................................................04-24

7-5. High pressure protection ..............................................................................................04-24

7-6. Low outdoor temperature protection.............................................................................04-24

7-7. High temperature and high pressure release control....................................................04-25

Fujitsu ARXG54KHTA User Manual

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