1. Overview
The Fujitsu R32 Multi System is a high-efficiency, inverter-driven air conditioning solution designed to serve two to five indoor units from a single outdoor unit. This system offers flexible installation options, quiet performance, and energy-efficient operation using R32 refrigerant, which has a lower global warming potential (GWP) than traditional R410A.
Engineered for both residential and light commercial applications, it provides superior comfort, zoned control, and enhanced reliability with Fujitsu’s advanced inverter technology.
2. System Configuration
A single outdoor unit connects to 2–5 indoor units, allowing independent temperature and mode control in each room.
Typical Indoor Unit Types:
Wall-mounted
Cassette (ceiling)
Ducted concealed
Floor console
Outdoor Unit Models:
AO(Multi)-R32 series (e.g., AOTG18LATC / AOTG24LATC / AOTG36LATC / AOTG45LATC)
Maximum Connectable Indoor Units: 5
Indoor Unit Diversity Ratio: Up to 130% (model dependent)
3. Key Features
a. Energy Efficiency
Utilizes R32 refrigerant for higher thermal efficiency and reduced environmental impact.
Inverter compressor technology optimizes energy use according to load demand.
Achieves up to 5-star efficiency ratings (model dependent).
b. Independent Zoning
Each connected indoor unit can be operated independently:
Individual ON/OFF control
Separate temperature settings
Custom mode selection (Cool, Heat, Dry, Fan, Auto)
c. Compact Outdoor Design
Compact and lightweight outdoor unit minimizes installation space.
Ideal for residential rooftops, balconies, or small commercial premises.
d. Quiet Operation
Optimized fan and compressor design reduce noise levels to as low as 46 dB(A) (outdoor) and as low as 19 dB(A) (indoor).
Night mode automatically limits fan speed for reduced sound output.
e. Flexible Piping
Long refrigerant piping length allows freedom in indoor unit placement:
Up to 70 m total piping (model dependent)
Maximum 15 m height difference between indoor and outdoor units
Simplified flare connections for quicker installation.
f. Smart Control Compatibility
Compatible with Fujitsu wired and wireless remote controllers (e.g., UTY-RNRYN, UTY-RVNYN).
Optional Wi-Fi adapter (UTY-TFSXZ2) for smart home integration and remote operation via the FGLair® App.
4. Operating Modes
| Mode | Function | Typical Use |
|---|---|---|
| Cool | Reduces room temperature efficiently. | Summer cooling. |
| Heat | Provides heating through reverse-cycle operation. | Winter comfort. |
| Dry | Dehumidifies without overcooling. | Humid conditions. |
| Fan Only | Circulates air without temperature change. | Air movement. |
| Auto | Automatically selects cooling or heating based on room temperature. | Year-round convenience. |
Note: When multiple indoor units are running in different modes, the system prioritizes the first mode selected. Other rooms will follow that mode.
5. Installation Considerations
Ensure proper refrigerant piping and electrical wiring as per the Design & Technical Manual.
Maintain adequate ventilation around the outdoor unit.
Install drain piping to prevent condensation issues.
Use approved R32-rated components and tools.
6. Maintenance & Service
Clean indoor unit filters every 2–4 weeks.
Keep the outdoor unit free of leaves, dust, and obstructions.
Schedule regular servicing to ensure system efficiency and longevity.
The wired controller provides error history and service diagnostic functions for quick troubleshooting.
7. Advantages at a Glance
✅ Energy-efficient R32 refrigerant
✅ Individual room comfort control
✅ Compact and quiet outdoor unit
✅ Wide range of compatible indoor models
✅ Smart control and Wi-Fi connectivity options
✅ Reliable Fujitsu inverter technology
