Ductless commissioning
A planning and verification checklist for qualified technicians. Every numerical limit and required procedure comes from the installed equipment’s instructions.
Split or monoblock?
A conventional mini-split has separate indoor and outdoor units connected by refrigerant piping. Ephoca / INNOVA AIO and Olimpia Splendid Unico equipment have the circuit inside one cabinet. Apply only the checklist steps relevant to the actual design.
Ephoca / INNOVA reference →1. Identify the entire system
Record indoor and outdoor models, approved combination, controllers, branch equipment, refrigerant and serials. Select the correct regional and refrigerant edition of installation and service documents. Inventory optional sensors, adapters, pumps and mitigation equipment.
2. Confirm placement and airflow
Check mounting, clearances, service access and room airflow against the manual. Cassettes and concealed ducted heads need their own drain and static-pressure requirements. A monoblock needs correctly installed wall sleeves, grilles and outdoor air paths; it does not need a field refrigerant lineset.
3. Match power and communication
A qualified technician verifies supply, grounding, protective devices and terminal functions from the actual diagram. Some systems power a head from outside; others require separate supplies. Isolate every source and follow manufacturer DC-bus discharge verification before internal work. Never infer terminal functions from numbers or wire colors.
4. Prove the water path
Verify gravity slope, insulation, traps or venting only as the manual specifies, pump operation where fitted, and a documented drain test. For monoblocks, select the required condensate arrangement for climate and mode; evaporators, nebulizers and drain connections are accessory-specific.
5. Prepare the sealed circuit correctly
For field-installed split piping, qualified personnel follow the manufacturer’s pressure-test, evacuation, joint and leak-test requirements using equipment appropriate to the nameplate refrigerant. Approved quick-connect systems have their own connection procedure. Determine any added charge from the exact line-length and weight instructions. A conventional charge-to-subcooling rule is not a generic inverter commissioning method.
6. Verify zones and controls
Confirm indoor models, connected-capacity limits, port-to-room mapping and electrical addressing where required. Run the documented test mode and verify each room responds to its own demand. Explain shared heating/cooling mode priority on systems that require it; a waiting head is not automatically defective.
7. Verify protective functions and record results
Use the model’s required startup and protective-function checks, including A2L detection or mitigation where applicable. Record room and outdoor conditions, operating mode, model-authorized readings, drain results and fault history. Compare performance using the manufacturer’s stated conditions rather than a fixed temperature-drop target. Restore panels and settings, explain filter care and provide the documentation.