Brand: Fujitsu
Category: Air Conditioners
Document Type: Manual
Language: EN
Manual for ASU18RLF
Uploaded: Nov. 21, 2025, 8:12 p.m.
Manual Publish Date: 2016-05-01
Warranty Information
This manual does not contain specific warranty period information.
- Capacity Control: Adjusts compressor frequency based on indoor unit capacity, set temperature, room temperature, and outside temperature.
- Auto Changeover Operation: Automatically selects between Heating, Cooling, Dry, and Monitoring modes based on temperature. Operates fans for 3 minutes initially, then senses temperature to select the mode.
- Indoor Fan Control: Provides various fan speeds (Quiet, Lo, Me, Hi, Powerful) for different operation modes (Heating, Cooling/Fan, Dry).
- Louver Control: Allows adjustment of vertical and horizontal airflow direction and swing operations for optimal air distribution.
- Outdoor Fan Control: Details fan speeds for the outdoor unit in Cooling and Heating modes.
- Compressor Control: Outlines operating frequency ranges and startup control for the compressor.
- Timer Operation: Features wireless and wired remote controller options for ON/OFF timers, program timers, and sleep timers.
- Electronic Expansion Valve Control: Manages the electronic expansion valve's opening for optimal operation based on various sensor inputs.
- Test Operation Control: Procedures for initiating and releasing test operation modes using different remote controllers.
- Prevent to Restart for 3 Minutes: Ensures a 3-minute delay before the compressor restarts after being stopped.
- 4-Way Valve Extension Select: Manages the 4-way valve switching during mode changes.
Troubleshooting and error codes
| Error Display | Trouble Diagnosis |
|---|---|
| 2-1 ERROR DISPLAY | |
| 2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY | See page 02-01 |
| 2-1-2 SIMPLE REMOTE CONTROLLER DISPLAY | See page 02-03 |
| 2-1-3 CENTRAL REMOTE CONTROLLER DISPLAY | See page 02-03 |
| 2-1-4 OUTDOOR UNIT DISPLAY | See page 02-03 |
| 2-2 TROUBLE SHOOTING WITH ERROR CODE | See page 02-05 |
| 2-3 TROUBLE SHOOTING WITH NO ERROR CODE | See page 02-40 |
| 2-4 SERVICE PARTS INFORMATION | See page 02-49 |