Fujitsu ACUH09LUAS1 Service Manual page 106

4. CONTROL AND FUNCTIONS
1. Compressor frequency control..................................................................04-1
1-1. Cooling operation ...........................................................................................................04-1
1-2. Heating operation ...........................................................................................................04-3
1-3. Dry operation ..................................................................................................................04-4
1-4. Compressor frequency at normal start-up ......................................................................04-5
1-5. Compressor frequency limitation by outdoor temperature ..............................................04-6
2. Auto changeover operation........................................................................04-8
3. Fan control.................................................................................................04-10
3-1. Indoor fan control..........................................................................................................04-10
3-2. Outdoor fan control.......................................................................................................04-13
4. Louver control ...........................................................................................04-16
4-1. Individual louver control ................................................................................................04-16
4-2. All louver control ...........................................................................................................04-16
4-3. Swing operation............................................................................................................04-17
5. Timer operation control ............................................................................04-18
5-1. →ireless remote control ................................................................................................04-18
5-2. →ired remote control ....................................................................................................04-20
6. Defrost operation control .........................................................................04-23
6-1. Defrost operation in heating operation stopped ............................................................04-24
7. Various control ..........................................................................................04-25
7-1. Auto restart ...................................................................................................................04-25
7-2. MIN. HEAT operation ...................................................................................................04-25
7-3. ECONOM↔ operation ...................................................................................................04-25
7-4. Fresh air control............................................................................................................04-26
7-5. Compressor preheating ................................................................................................04-26
7-6. External electrical heater control ..................................................................................04-27
7-7. Electronic expansion valve control ...............................................................................04-27
7-8. Drain pump control .......................................................................................................04-28
7-9. Prevention to restart for 3 minutes (3 minutes st) .........................................................04-29
7-10. 4-way valve control.....................................................................................................04-29
7-11. Unit status monitoring and the detected value indication............................................04-30
8. Various protections...................................................................................04-32
8-1. Discharge gas temperature over-rise prevention control ..............................................04-32
8-2. Anti-freezing control (cooling and dry mode) ................................................................04-32
8-3. Current release control .................................................................................................04-33
8-4. Indoor unit fan motor over temperature protection........................................................04-34
8-5. Compressor temperature protection (for 12/18 model) .................................................04-34
8-6. Low outdoor temperature protection.............................................................................04-34
8-7. High temperature and high pressure release control ....................................................04-35
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