Senville codes: the same characters mean different things by series
Senville Aura, Leto, and older series do not share one code table. Learn why the series matters more than the code and where to confirm it.
What this means
Senville publishes different code tables for its Aura, Leto, and earlier series, and the same two characters can describe unrelated conditions between them. The series therefore has to be established before the code is looked up, and the model prefix on the data plate is what establishes it.
Equipment and model context
Senville ductless mini-split systems across the Aura, Leto, and earlier series documented in Senville support
- Aura series
- Leto series
- SENA and SENL model prefixes
Senville systems are identified by model prefix rather than by the name printed on the front panel, and the same series name has covered more than one generation. The support document that matches your exact model number is the reference, and a chart labelled only with the brand is not.
What you may notice
- A two-character code appears on the indoor display and operation has stopped.
- A code chart found online gives a meaning that does not match what the system is doing.
- One head on a multi-zone installation reports a code while the others operate.
Likely causes
- Signalling between the indoor and outdoor units can be interrupted by a cable fault, a terminal problem, or a board condition.
- Sensing elements on either unit can leave the range the control will act on.
- Outdoor protections stop the system and are reported through the indoor display, which is the only display present.
Diagnostic paths
The chart you found does not match the behaviour
A code lookup returns a meaning that has nothing to do with what the system is actually doing, such as a sensor entry on a system that will not begin a cycle at all.
Stop and check the model prefix on the data plate against the series the chart was written for. A mismatch between behaviour and entry is the usual sign of the wrong table.
The system will not start at all
No operation occurs at any setting, with the code appearing shortly after each attempt rather than after a period of running.
Note that nothing runs. A fault at the point of starting is a different group from one reached after operation, whichever series the equipment belongs to.
It stops after running for a period
Cooling or heating is produced for minutes or hours and the system then shuts down with the code displayed.
Time the run before each stop. Conditions reached after operation point at protections and measurements rather than at signalling or startup.
A brand is a name on a box; a series is a control platform with its own firmware and its own table. Two units wearing the same badge can run different code assignments entirely, and only the model number separates them.
- Brand nameShared across everything sold
- Series nameNarrower, but reused across generations
- Model prefixIdentifies the platform precisely
- Code tableBelongs to that platform alone
| Source | Reliability | Why |
|---|---|---|
| Model prefix on the data plate | High | Identifies the series and generation |
| Name on the front panel | Partial | A series name has covered more than one generation |
| Manual supplied with the unit | High | Written for that equipment |
| General brand chart | Low | Series differences are flattened away |
How a wrong lookup survives scrutiny
Mismatched code charts cause trouble precisely because nothing about them looks wrong. Two characters match, an entry is returned, and it describes a plausible fault on a mini-split. Nothing announces that the entry was written for different firmware, and the reader proceeds confidently toward a component that was never involved.
The check that catches it costs nothing: compare what the entry claims against what the system is actually doing. An entry describing a sensor on a system that will not start at all, or a startup condition on one that ran for an hour first, is a signal that the table does not belong to this equipment.
Model prefixes outlive marketing names
Series names are marketing, and they are reused. A manufacturer can carry a name across a generation change that alters the control board, the firmware, and the code assignments, and nothing on the front panel says so. Model prefixes track the engineering rather than the branding, which is why every page on this site keeps asking for them.
Photographing both data plates at the start of any fault takes a minute and removes this entire class of problem. It also gives a technician something to work from before they arrive, rather than a two-character code and a brand name. The model number guide explains where each plate is fitted on an indoor and an outdoor unit, and the Senville EH 02 page covers one specific published entry scoped to the series it was written for.
What to give the technician
Provide both full model numbers from the data plates, the code photographed from the display, whether the failure is at startup or after running, and how long the system ran beforehand.
Safe homeowner checks
- Photograph the data plates on the indoor and outdoor units and read the full model numbers from the images.
- Photograph the displayed code before interrupting power for any reason.
- Note whether the system fails at startup or after a period of running, since that alone separates two groups of conditions.
Is a reset appropriate?
Interrupting power clears a displayed code and lets the system re-evaluate, so one restart distinguishes a latched report from a live condition. Capture the code and the model numbers before doing it.
When to call a technician
- Testing the interconnecting cable, sensing elements, and boards requires casings that carry mains voltage to be opened, which is qualified work.
- Conditions reached after a period of operation involve the refrigerant circuit on this equipment, and that is certified activity rather than an owner check.
Questions people ask about this
Do Senville error codes mean the same across all models?
No. Aura, Leto, and earlier series carry their own tables, and the same two characters can describe unrelated conditions. The model prefix on the data plate decides which table applies.
How do I know which Senville series I have?
The model prefix on the data plate identifies the platform, which the name on the front panel does not, because series names have been carried across generation changes.
The chart says a sensor but nothing starts. Why?
That mismatch between the entry and the behaviour is the usual sign of a chart written for different firmware. Confirm the model prefix before acting on anything the entry suggests.
Evidence recordHow this page was checked
official manufacturer support article · checked 2026-09-15
Every technical claim above was written from primary documentation held in the HVAC Bench evidence record: Senville technical literature. Where a source limits a definition to certain models, test conditions, or product classes, that limit is repeated here rather than generalised.
- Documentation class
- official manufacturer support article
- Scope of the definition
- Senville ductless mini-split systems across the Aura, Leto, and earlier series documented in Senville support
- Last checked
- 2026-09-15