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General Assist Technical Reference
AIRSTAGE V-II Series VRF
System introduction and compatible indoor-unit lineup
Approximate product era: early to mid-2010s
The AIRSTAGE V-II Series is a large-capacity R410A VRF platform developed as the successor to the original V Series. It was designed for multi-storey offices, hotels, education, healthcare, retail and other large commercial applications requiring extensive zoning and centralised control.
Naming caution: “V-II” may be written informally as “VII,” but it is not the same as the later V-III generation. Always confirm the complete model number before selecting manuals, PCBs, controllers, indoor units or commissioning procedures.
1. Key technical highlights
| Feature | Typical V-II Series reference |
|---|---|
| Refrigerant | R410A |
| System type | Heat pump and heat-recovery VRF configurations, model dependent |
| Compressor technology | DC inverter scroll compressor control, with multiple-compressor and rotation logic on applicable modules |
| Outdoor capacity | Approximately 22 kW upward, with modular combinations for larger systems |
| Indoor-unit connections | Up to 48 indoor units on applicable system combinations |
| Total piping length | Up to approximately 1,000 m on applicable system configurations |
| Height difference | Up to approximately 110 m where the specific design conditions allow |
| Controls | Wired controllers, central controllers, touch panels and BMS interfaces |
| Approximate era | Circa 2012–2016, varying by market and model |
The maximum piping, height and indoor-unit figures depend on the exact outdoor combination and design conditions. Do not apply headline maximums to every system without checking the applicable design and installation manual.
2. Indoor-unit lineup
The uploaded two-page lineup shows indoor units from approximately 2.2 kW to 28.0 kW cooling capacity, covering cassette, concealed duct, floor/ceiling, ceiling and wall-mounted configurations.
Cassette indoor units
| Type | Models shown | Cooling range | Accessory |
|---|---|---|---|
| Compact cassette | AUXB07GALH, AUXB09GALH, AUXB12GALH, AUXB14GALH, AUXB18GALH, AUXB24GALH | 2.2–7.1 kW | UTG-UFYC-W grille |
| Cassette | AUXD18GALH, AUXD24GALH, AUXA18GALH, AUXA24GALH, AUXA30GALH, AUXA34GALH, AUXA36GALH, AUXA45GALH, AUXA54GALH | 5.6–14.0 kW | UTG-UGYA-W grille |
Ducted and concealed indoor units
| Type | Models shown | Cooling range |
|---|---|---|
| Low-static / concealed floor | ARXB07GALH, ARXB09GALH, ARXB12GALH, ARXB14GALH, ARXB18GALH | 2.2–5.6 kW |
| Compact slim duct | ARXK07GCLH / GALH through ARXK24GCLH / GALH | 2.2–7.1 kW |
| Slim duct / slim concealed floor | ARXD07GALH, ARXD09GALH, ARXD12GALH, ARXD14GALH, ARXD18GALH, ARXD24GALH | 2.2–7.1 kW |
| Low-static pressure duct | ARXB24GALH, ARXB30GALH, ARXB36GALH, ARXB45GALH | 7.1–12.5 kW |
| Medium-static pressure duct | ARXA24–45GALH and ARXA24–45GBLH | 7.1–12.5 kW |
| High-static pressure duct | ARXC36GATH, ARXC36GBTH, ARXC45GATH, ARXC60GATH, ARXC72GATH, ARXC90GATH, ARXC96GATH | 11.2–28.0 kW |
Floor, ceiling and wall-mounted indoor units
| Type | Models shown | Cooling range | Notes |
|---|---|---|---|
| Floor / ceiling | ABYA12GATH, ABYA14GATH, ABYA18GATH, ABYA24GATH | 3.6–7.1 kW | Convertible floor or ceiling installation |
| Ceiling | ABYA30GATH, ABYA36GATH, ABYA45GATH, ABYA54GATH | 9.0–14.0 kW | Ceiling-suspended type |
| Wall mounted | ASYA07GACH, ASYA09GACH, ASYA12GACH, ASYA14GACH, ASYA18GACH, ASYA24GACH, ASYA30GACH | 2.2–8.0 kW | Standard internal EEV models |
| Wall mounted with external EEV | ASYE07GACH, ASYE09GACH, ASYE12GACH, ASYE14GACH | 2.2–4.5 kW | UTR-EV09XB or UTR-EV14XB required |
External EEV kit reference
| Indoor capacity class | EEV kit |
|---|---|
| 07 / 09 class | UTR-EV09XB |
| 12 / 14 class | UTR-EV14XB |
3. Service and replacement guidance
| 1 | Confirm the generation. V-II components, controls and addressing procedures must not be assumed interchangeable with V Series, V-III, VR-II, VR-III or J Series equipment. |
| 2 | Use the complete model number. Suffixes such as GALH, GBLH, GATH, GBTH and GACH identify different product arrangements and must be matched exactly. |
| 3 | Verify spare-parts availability. Production has ceased and availability varies by part. Confirm stock and supersession before committing to repair. |
| 4 | Readdress replacement PCBs. When replacing indoor or outdoor control boards, transfer DIP-switch settings and complete the applicable addressing and capacity-check process. |
| 5 | Plan replacement carefully. Existing R410A pipework and controls require engineering assessment before reuse with a newer VRF platform. |
Escalation information: Provide outdoor and indoor model numbers, serial numbers, controller type, refrigerant-system address, indoor-unit address, fault history, LED display, PCB part numbers and details of any recent component replacement.
Do not mix generations: A physical or electrical connector appearing similar does not establish compatibility. Use the V-II design, installation and service documentation for all selections and repairs.
This article is a practical overview based on the supplied V-II Series indoor-unit lineup. It does not replace the applicable design, installation, service or commissioning manuals. Maximum system values vary by outdoor model, combination and design conditions.