Fujitsu ASUH24LPAS Service Manual

CONTENTS
4. CONTROL AND FUNCTIONS
1. Rotation number control of compressor...................................................04-1
1-1. Cooling operation ...........................................................................................................04-1
1-2. Heating operation ...........................................................................................................04-3
1-3. Dry operation..................................................................................................................04-4
1-4. Rotation number of compressor at normal start-up ........................................................04-4
1-5. Limitation of compressor rotation number by outdoor temperature.................................04-5
2. Auto changeover operation........................................................................04-6
3. Fan control...................................................................................................04-8
3-1. Indoor fan control............................................................................................................04-8
3-2. Outdoor fan control.......................................................................................................04-12
4. Louver control ...........................................................................................04-14
4-1. Horizontal louver control...............................................................................................04-14
4-2. Vertical 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. MANUAL AUTO operation............................................................................................04-23
7-3. Forced cooling operation ..............................................................................................04-24
7-4. ECONOMY operation ...................................................................................................04-24
7-5. POWERFUL operation .................................................................................................04-24
7-6. Fresh air control............................................................................................................04-25
7-7. Compressor preheating ................................................................................................04-25
7-8. External electrical heater control ..................................................................................04-25
7-9. Electronic expansion valve control ...............................................................................04-26
7-10. Prevention to restart for 3 minutes (3 minutes st) .......................................................04-26
7-11. 4-way valve control.....................................................................................................04-26
7-12. Unit status monitoring and the detected value indication............................................04-27
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. Cooling pressure over-rise protection...........................................................................04-30
8-5. Compressor temperature protection ............................................................................04-30
8-6. Low outdoor temperature protection.............................................................................04-31
8-7. High temperature and high pressure release control....................................................04-31

Fujitsu ASUH24LPAS Specifications

General

Brand	Fujitsu
Model	ASUH24LPAS
Category	Air Conditioner
Language	English