General Assist | Australia and New Zealand Technical Reference
(Fujitsu) General Model Code Guide
How to identify common indoor and outdoor model generations and their approximate sales eras
Important: A model prefix is an identification guide, not an exact manufacturing date. Product ranges overlapped, stock could remain available after a replacement range launched, and Australia and New Zealand did not always change models at the same time. Always confirm the complete model and serial number before selecting parts, manuals or technical data.
Quick rule: The broad outdoor-unit progression is AOT → AOTA / AOTB / AOTC → AOTG → AOTH. The letters after the capacity number are normally more useful for identifying the exact platform, refrigerant and matched indoor unit.
1. Quick outdoor-unit timeline
| AOT1980s to mid-2000s | AOTAEarly to late 2000s | AOTBMid-2000s to early 2010s | AOTCLate 2000s to mid-2010s | AOTGAbout 2010 to 2025 | AOTHAbout 2022 to current |
| Prefix | Approximate ANZ era | Typical context | Service guidance |
|---|---|---|---|
| AOT | 1980s to approximately 2005-2008 | Older fixed-speed and early inverter systems. This prefix covers many unrelated generations and refrigerant types. | Never identify a unit from AOT alone. The complete suffix is essential. |
| AOTA | Approximately 2002-2009 | Transitional Australian and New Zealand coding across selected residential, ducted and commercial families. | AOTA did not replace every plain AOT model at the same time. |
| AOTB | Approximately 2005-2012 | Later inverter and R410A-era product families, with overlap into AOTA and AOTC ranges. | Use the full suffix to distinguish refrigerant, electrical and matched-unit differences. |
| AOTC | Approximately 2008-2015 | Selected later-generation residential and light-commercial systems before AOTG became dominant. | AOTC appears in selected ranges rather than every product category. |
| AOTG | Approximately 2010-2025 | Long-running ANZ prefix used across R410A and R32 wall splits, multi systems, ducted, cassette and floor/ceiling products. | AOTG alone does not establish refrigerant, age or compatibility. |
| AOTH | Approximately 2022-current | Newer-generation coding, predominantly associated with current R32 residential and light-commercial products. | Commonly paired with newer ASTH, ARTH, AUTH and ABTH indoor models. |
Confidence note: AOTG and AOTH ranges can be supported comparatively well from product documentation and registrations. AOTA, AOTB and AOTC dates should be treated as broad service-era estimates because there was no universal cutover across all product categories.
2. How to read a model number
AOTG 54 L C T L
| AOTGOutdoor-unit family and market coding | 54Nominal capacity class | LSeries or refrigerant-era identifier | CPlatform or design variant | TLElectrical, configuration or revision detail |
Do not apply one universal suffix formula. The meaning of individual suffix positions changes between wall-mounted, multi, ducted, cassette and commercial product families.
3. Common indoor-unit prefixes
| Prefix family | Typical product type | Examples |
|---|---|---|
| AST / ASTA / ASTB / ASTG / ASTH | Wall-mounted indoor unit | ASTG09KMCAASTH18KMTD |
| ART / ARTA / ARTG / ARTH | Ducted indoor unit | ARTG45LHTAARTH54KMTAP |
| AUT / AUTA / AUTG / AUTH | Cassette indoor unit | Confirm the complete cassette and fascia model. |
| ABT / ABTG / ABTH | Floor/ceiling or ceiling-type indoor unit | Product description varies by generation. |
Capacity-number guide
Numbers such as 09, 12, 18, 24, 30, 36, 45 and 54 are nominal capacity classes derived from older BTU/h conventions. They are not the exact rated output in kW. A “24” class system is generally around the 7 kW class, but the actual rated output varies by model.
4. Examples by generation
| Example combination | What it indicates | Likely era |
|---|---|---|
| AST7RSCCW / AOT7RSCC | Older wall-mounted matched set using the plain AOT prefix. | Legacy generation |
| ART30RLC / AOT30RMBL | Legacy ducted combination. Similar capacity models are not automatically interchangeable. | Older R-series era |
| ASTG09KMCA / AOTG09KMCA | AOTG-era R32 wall-mounted system. | Late 2010s-2020s |
| ARTG45LHTA / AOTG45LBTA | AOTG-era ducted system from the R410A product period. | 2010s-early 2020s |
| ASTH18KMTD / AOTH18KMTD | Newer-generation R32 wall-mounted system. | 2020s |
| ARTH54KMTAP / AOTH54KBTA | Newer high-static R32 ducted matched system. | Mid-2020s |
5. Australia and New Zealand considerations
| 1 | The same core model may be sold in both countries, but launch dates and stock run-out periods can differ. |
| 2 | A joint Australia/New Zealand registration does not prove an identical retail launch date. |
| 3 | New Zealand may retain particular heating-focused models or variants longer than Australia. |
| 4 | Use the country-specific product manual, parts list and compatibility table where available. |
6. Correct identification workflow
| 1 | Record the complete indoor model, outdoor model and serial number from the rating labels. |
| 2 | Confirm the product type: single split, multi, ducted, cassette, floor/ceiling or commercial system. |
| 3 | Check the approved indoor/outdoor matched combination. |
| 4 | Confirm the refrigerant from the rating label. Never infer refrigerant solely from AOTG or AOTH. |
| 5 | Search the complete model number in General Assist or the applicable product-manual system. |
| 6 | Before ordering parts, confirm the exact production revision and any serial-number break. |
Warranty warning: Do not use the estimated model era to approve or decline warranty. Warranty eligibility must be assessed using proof of purchase, installation date, serial information and the applicable warranty terms.
Reference basis: These ranges are deliberately approximate and are intended for service identification. They reflect historical technical manuals, product catalogues and Australian/New Zealand product registrations. There is no single published Fujitsu General table assigning one universal start and finish date to every AOT-prefix generation across all product categories.