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CONTENTS

1. CONTROL AND FUNCTIONS

1. Compressor frequency control..................................................................01-1

1-1. Cooling operation ...........................................................................................................01-1

1-2. Heating operation ...........................................................................................................01-3

1-3. Dry operation..................................................................................................................01-4

1-4. Compressor frequency at normal start-up ......................................................................01-5

1-5. Compressor frequency limitation by outdoor temperature ..............................................01-7

2. Auto changeover operation........................................................................01-9

3. Fan control.................................................................................................01-11

3-1. Indoor fan control..........................................................................................................01-11

3-2. Outdoor fan control.......................................................................................................01-14

4. Timer operation control ............................................................................01-16

4-1. Wireless remote control................................................................................................01-16

4-2. Wired remote control ....................................................................................................01-18

5. Defrost operation control .........................................................................01-21

5-1. Defrost operation in heating operation stopped ............................................................01-22

6. Various control..........................................................................................01-23

6-1. Auto restart...................................................................................................................01-23

6-2. 10 °C HEAT operation ..................................................................................................01-23

6-3. ECONOMY operation ...................................................................................................01-23

6-4. Compressor preheating ................................................................................................01-24

6-5. External electrical heater control ..................................................................................01-24

6-6. Electronic expansion valve control ...............................................................................01-24

6-7. Drain pump control .......................................................................................................01-25

6-8. 4-way valve control.......................................................................................................01-28

6-9. Peak cut operation........................................................................................................01-28

6-10. Outdoor unit low noise operation ................................................................................01-29

7. Various protections...................................................................................01-30

7-1. Discharge gas temperature over-rise prevention control ..............................................01-30

7-2. Anti-freezing control (cooling and dry mode) ................................................................01-30

7-3. Current release control .................................................................................................01-31

7-4. Indoor unit fan motor over temperature protection........................................................01-31

7-5. Compressor temperature protection .............................................................................01-32

7-6. High pressure protection ..............................................................................................01-32

7-7. Low outdoor temperature protection.............................................................................01-32

7-8. High temperature and high pressure release control....................................................01-33

Fujitsu AO G30KBTB Series Service Instruction

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