How old is my Senville mini split?

Serial number age decoder for Senville mini splits: 1 format era, the decode rule in plain English, transcribed tables, and the official lookup.

Senville's official lookup at senville.com returns warranty / registration lookup.

Format eras

era not stated PARTIAL
######################digits 17-18 (= 5th and 6th from the right) as YY -> 2012 (building-center reading)

How to read the serial

era not stated formatPARTIAL

Shape ###################### · example 3407399160691290120139 · confidence low

Year: digits 17-18 (= 5th and 6th from the right) as YY -> 2012 (building-center reading)
Week or month: not given

Documented but not evaluated by the decoder: week/month position not parseable from prose: 'not given'.

Trap: LOW CONFIDENCE: the page's headline example is 24 digits (340739991606912901220058) while the chart example is 22; the MrCool page reads the identical Midea barcode shape as Y/M/DD at positions 12-15, which would make this unit Jan 2019. Prefer the printed date on the label (style 2).

Where the data plate is on a mini split

Two plates: one on the side of the outdoor unit, one on the indoor head (lift the front cover or look under the unit). The two serials differ; decode the outdoor unit for the system age.

General guidance, not brand-specific: the owner's manual or the installer can point to the exact spot. See the data plate guide.

Official lookup: the authority

Open the official Senville lookup takes serial number; returns warranty / registration lookup; URL verified live

This site is a reference built from published tables. The manufacturer's own lookup wins whenever the two disagree.

What we could not confirm

The era not stated format is only partially confirmed (PARTIAL (conflicting readings)).
The era not stated format is documented but not decodable here: week/month position not parseable from prose: 'not given'.
building-center says: 22-digit all-numeric barcode serial, year = 5th and 6th digits from the RIGHT (3407399160691290 12 0139 = 2012); newer labels print the date directly. The same shape decoded the MrCool way gives 2019-01-29 (positions 12-15 = 9,1,29). Unresolved. senville.com/warranty-registration/ = 200.

Sources

https://www.building-center.org/senville-hvac-equipment/
img: Senville.png
https://senville.com/warranty-registration/official