Senville is a Canadian brand headquartered in Montreal that sells mini-splits directly to homeowners online. The equipment is built on Midea's platform, which is why the error codes match Midea's. The two lines most people own are LETO, the entry series, and AURA, the cold-climate series that Senville rates for heating down to −30°C.
Because the box arrives on a pallet in the driveway, most Senville systems are installed by the owner or a handyman. The equipment itself is rarely the problem. What we find is installation: flare joints made with a hardware-store tool, line sets opened to humid air and never evacuated, and interconnect cable that was whatever was in the garage.
Here is the line Ontario draws. You may mount the indoor head, set the outdoor unit on its pad or bracket and run the line set through the wall. Connecting, charging and recovering refrigerant requires a technician holding an ODP card, and the new circuit is electrical work under the ESA. Our answer on installing a mini-split yourself in Ontario sets out who may do what.
A commissioning visit from us covers the part you cannot legally do. We pressure-test the line set with dry nitrogen, pull a vacuum measured on a micron gauge, release the factory charge, add refrigerant by weight if the line set is longer than the pre-charge allows, verify the wiring and run the system in both modes. You keep an invoice showing a licensed technician did it, which Senville's warranty asks for.
Senville lines we install and service
The entry line, with model numbers beginning SENL. It is the unit most often bought for a garage, a workshop, a sunroom or a single bedroom. Senville lists a 5-year parts and 5-year compressor warranty on it.
The cold-climate line, with model numbers beginning SENA and a longer 10-year compressor warranty. AURA is the one to choose when the mini-split is the main heat for a space, such as a room over a garage or a century farmhouse wing with no ductwork.
One outdoor unit feeding two or more indoor heads. A display showing two dashes on a multi-zone system is a mode conflict, meaning one head is calling for heat while another calls for cooling. It is a settings issue, not a breakdown: put every head in the same mode.
Earlier units show short codes such as E1, EC and P4. Current LETO and AURA units show the longer format: EL 01, EL 0C and PC 04. The meanings carry over, and our Senville mini-split error codes guide lists both sets.
What goes wrong on Senville equipment
EC or EL 0C: the system lacks refrigerant
This is the signature fault of a self-installed Senville, and it often appears weeks after start-up, once a weeping flare has let enough charge out. Units with a refrigerant sensor can also show EH C1, a detected leak at the indoor head. We find the joint with a nitrogen test, cut and remake the flare with the correct tool and torque, evacuate and weigh the charge back in: $300–$800+ depending on access and how much refrigerant was lost.
A system that was never vacuumed or pressure-tested
Opening the service valves without evacuating traps air and moisture in the circuit. The unit runs, but capacity is poor, pressures run high and PC 03 pressure protection can trip on hot or cold days. Moisture also turns the oil acidic over time. The correction is to recover the charge, pressure-test, evacuate properly and recharge by weight, and we quote it in writing after we have gauges on the system.
E1 or EL 01: communication error from the wrong interconnect cable
The indoor and outdoor boards talk over the cable that also carries power between them. Undersized wire, solid instead of stranded conductors, a splice in the wall or two conductors landed on the wrong terminals will all produce this code. We check the cable against the gauge and conductor count in the installation manual and replace the run when it does not match.
P4 or PC 04: inverter compressor drive fault
The outdoor board could not drive the compressor. Causes run from a poor connection or low supply voltage to a failed inverter board or a damaged compressor, and the fault is more common on systems that ran undercharged or contaminated. Switch the unit off at the breaker. The board is an order-in Senville part, so diagnosis comes first and the repair price follows the part quote.
Senville warranty: what to know
- Senville's support site lists 5 years on parts and 10 years on the compressor for AURA, and 5 years on parts and 5 years on the compressor for LETO.
- The condition that catches people: to keep the warranty valid, a licensed technician must evacuate and pressure-test the line sets and release the refrigerant charge held in the outdoor unit. Senville states that failing to comply voids the warranty.
- Senville does not pay labour for repairs under any circumstances. A successful claim gets you the part; the diagnosis and the fitting are billed by whoever does the work.
- Keep three documents together: your order confirmation, the model and serial numbers of both units, and the commissioning invoice from the licensed technician. Claims go to Senville's support team directly, and we supply the pressure, vacuum and electrical readings they ask for.
Parts availability in the GTA
Senville parts are ordered from Senville and shipped; they are not sitting on a GTA wholesale counter, so plan on a courier wait for a board, a fan motor or a sensor instead of a same-day pickup. That is the trade-off for the price you paid online. What a Senville usually needs is not a Senville part at all: new flare nuts and properly made flares, a correctly sized stranded interconnect cable, line-set insulation, a disconnect and refrigerant of the type on the nameplate are all on the truck. We take the model numbers from both nameplates on the first visit so that any order goes in once.
Senville Mini-Split Error Codes Explained — what each one means and whether it is safe to keep running.
Common questions
Will you install or finish a Senville mini-split that I bought online?
Yes. You can mount the equipment yourself and call us for the refrigerant connection, pressure test, vacuum and start-up, or have us do the whole installation. We inspect any existing flares and wiring before we open the valves, and we will tell you if something has to be redone first. Book through our contact page with the model number handy.
Can I legally charge or connect the refrigerant lines myself in Ontario?
No. Handling refrigerant in Ontario requires an Ozone Depletion Prevention (ODP) card, and that covers connecting, charging and recovering it. Releasing refrigerant to the air is an offence. The mechanical mounting is yours to do if you wish, but the sealed-system work and the proof that it was done properly belong to a certified technician.
My Senville worked for a month and now shows EL 0C. What happened?
A slow leak, almost always at a flare joint. A flare that is slightly off-square or under-torqued can hold through start-up and weep for weeks until the charge drops far enough to trip the code. Turn the unit off. Adding refrigerant without remaking the joint only buys another month, and running it low risks the compressor.
Does a self-installed Senville qualify for Ontario heat pump rebates?
Do not count on it. Heat pump rebates run through the Home Renovation Savings Program, which requires a participating contractor and approval before the installation. A unit bought online and mounted by the owner generally sits outside that process. Read the conditions on our heat pump rebates in Ontario page before you order.
What does it cost to have a Senville commissioned professionally?
We quote it in writing once we know the line-set length, whether the flares need remaking, and whether the electrical circuit is in place and inspected. Nothing is charged beyond the $90–$150 diagnostic until you approve that figure. Commissioning a correctly mounted system is a short visit; correcting a contaminated one is a longer job and is priced accordingly.