The Fujitsu Airstage SET-ASTH12KNCA is an energy-efficient reverse-cycle wall-mounted air conditioner designed for small to medium-sized rooms. Delivering 3.4kW rated cooling and 4.0kW rated heating, it provides reliable year-round temperature control for bedrooms, offices, apartments and smaller living areas.
The Comfort Series combines a compact modern indoor unit with quiet operation, R32 refrigerant and an extended cooling operating range up to 50°C, making it well suited to Australian conditions.
Features
3.4kW rated cooling capacity
4.0kW rated heating capacity
Reverse-cycle heating and cooling
Inverter-controlled operation
Compact, modern indoor-unit design
R32 refrigerant with lower global-warming potential
Cooling operation in outdoor temperatures up to 50°C
Precise temperature adjustment in 0.5°C increments
Powerful Mode for rapid heating or cooling
Economy Mode for reduced compressor power consumption
Super Quiet indoor operation
Automatic heating and cooling changeover
Automatic restart following a temporary power interruption
Automatic up-and-down swing louvre
Sleep, program and on/off timers
Washable front panel
Filter-cleaning reminder
Blue Fin outdoor heat-exchanger protection
Demand Response Enabled Device terminal
Optional anywAiR Wi-Fi control
Optional touchscreen and simple wired controllers
Indoor & Outdoor
| Specification | Details |
|---|
| Indoor Model | ASTH12KNCA |
| Indoor Dimensions | 270 × 834 × 215mm |
| Indoor Weight | 9.5kg |
| Outdoor Model | AOTH12KNCA |
| Outdoor Dimensions | 541 × 663 × 290mm |
| Outdoor Weight | 25kg |
| Pipe Sizes | 6.35mm liquid / 9.52mm gas |
| Refrigerant | R32 |
| Cooling Capacity | 3.4kW rated; 0.9–3.7kW operating range |
| Heating Capacity | 4.0kW rated; 0.9–4.9kW operating range |
| Air Flow | 194L/s cooling / 217L/s heating on high fan |
| Drain | 13.0mm ID / 15.0–16.8mm OD |
| Power Supply | 220–240V, single-phase, 50Hz |
| Max Current | 9.0A |
Performance Specifications
| Specification | Cooling | Heating |
|---|
| Rated Capacity | 3.4kW | 4.0kW |
| Capacity Range | 0.9–3.7kW | 0.9–4.9kW |
| Rated Input Power | 0.96kW | 1.00kW |
| Input-Power Range | 0.25–1.27kW | 0.25–1.52kW |
| Running Current | 4.8A | 5.1A |
| EER / COP | 3.54 | 4.00 |
| Indoor Sound Pressure – High | 40dBA | 42dBA |
| Indoor Sound Pressure – Quiet | 20dBA | 22dBA |
| Outdoor Sound Pressure | 50dBA | 50dBA |
Additional Specifications
| Specification | Details |
|---|
| Set Code | SET-ASTH12KNCA |
| System Type | Reverse-cycle inverter split system |
| Recommended Breaker | 15A |
| Moisture Removal | 1.2L/h |
| Outdoor Sound Power Level | 65dBA |
| Maximum Pipe Length | 20m |
| Factory-Precharged Pipe Length | 15m |
| Maximum Height Difference | 15m |
| Cooling Operating Range | −10°C to 50°C |
| Heating Operating Range | −15°C to 24°C |
| Factory Refrigerant Charge | 700g |
| Cooling Star Rating – Hot/Average/Cold | 4.0 / 3.5 / 4.0 |
| Heating Star Rating – Hot/Average/Cold | 3.0 / 2.5 / 2.0 |
| TCSPF – Hot/Average/Cold | 5.536 / 5.235 / 5.599 |
| HSPF – Hot/Average/Cold | 4.955 / 4.207 / 3.507 |
Optional Controls and Accessories
| Accessory | Model Number | Details |
|---|
| anywAiR Technology Wi-Fi Adaptor II | UTY-NXT-BOX | Enables smartphone and tablet control through the myanywAiR Next app |
| Wi-Fi Adaptor Connection Cable | UTY-NXT-CAB | Required when installing the UTY-NXT-BOX on the ASTH12KNCA |
| Kagami Wired Remote Controller | UTY-RVRY | Premium mirrored-glass touchscreen controller; requires UTY-TWRXZ2 |
| LCD Touch-Panel Controller | UTY-RNRYT5 | Backlit touchscreen wired controller; requires UTY-TWRXZ2 |
| Simple Controller with Mode Selection | UTY-RSRYT | Simplified wired controller with mode control; requires UTY-TWRXZ2 |
| Simple Controller without Mode Selection | UTY-RHRYT | Simplified wired controller without mode control; requires UTY-TWRXZ2 |
| Two-Wire Communication Kit | UTY-TWRXZ2 | Required when connecting a compatible two-wire wired controller |
Wi-Fi Control
When fitted with the optional UTY-NXT-BOX Wi-Fi Adaptor II and UTY-NXT-CAB connection cable, the system can be operated through Fujitsu’s free myanywAiR Next application using a compatible smartphone or tablet.
Wi-Fi components are sold separately and require professional installation.
Wired Controller Requirements
The ASTH12KNCA does not accept the optional two-wire wall controllers directly. Installation of the UTY-TWRXZ2 communication kit is required when connecting:
UTY-RVRY Kagami controller
UTY-RNRYT5 touch-panel controller
UTY-RSRYT simple controller
UTY-RHRYT simple controller
The communication kit, controller and field-installed controller cable are sold separately.
Typical Applications
Important Information
This set comprises the ASTH12KNCA indoor unit and AOTH12KNCA outdoor unit.
Wi-Fi components and optional wired controllers are sold separately.
The UTY-TWRXZ2 communication kit is required when installing an optional two-wire wired controller.
Available controller functions depend on the selected controller and system configuration.
Capacity suitability should be confirmed through an appropriate room heat-load assessment.
Installation must be completed by a suitably qualified and licensed air-conditioning installer.
Source: Fujitsu Airstage Comfort Range Australian Brochure – January 2025.
