1. Introduktion og overview
This manual provides essential information for the installation, operation, and maintenance of your Gree Multi21+ Dual-Zone Concealed Duct Mini Split Air Conditioner Heat Pump. This system is designed to provide efficient heating and cooling for two distinct zones within a building.
The Multi21+ system utilizes Gree's G10 inverter-driven compressor technology and eco-friendly R410A refrigerant. The concealed duct indoor units are designed for discreet installation above suspended ceilings or within closet spaces, delivering conditioned air through ductwork and grilles.
Nøglefunktioner omfatter:
- Dual-zone capability for independent temperature control.
- Concealed duct indoor units for aesthetic integration.
- G10 Inverter Technology for energy efficiency and stable temperatures.
- Heating and cooling functionality.
- Stille betjening.
2. Sikkerhedsoplysninger
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation and operating instructions thoroughly before installing or servicing this equipment.
- Installation and servicing must be performed by a qualified, licensed HVAC technician.
- Sørg for, at alle elektriske forbindelser overholder lokale og nationale elektriske forskrifter.
- Do not attempt to repair or modify the unit yourself. Contact a qualified service professional.
- Afbryd altid strømmen til enheden, før du udfører vedligeholdelse eller rengøring.
- Refrigerant R410A is under high pressure. Only trained personnel should handle refrigerant.
3. Produktkomponenter
The Gree Multi21+ system consists of the following main components:
- Udendørs kondensatorenhed: Houses the compressor and outdoor coil.
- Indoor Concealed Duct Units (x2): Installed within ceilings or walls, connected to ductwork.
- Fjernbetjeninger (x2): For individual zone control.

Figur 3.1: Overview of the Gree Multi21+ Dual-Zone Mini Split System, showing the outdoor condenser unit, two concealed duct indoor units, and two remote controls.

Figure 3.2: A single Gree concealed duct indoor unit, designed for hidden installation within a ceiling or wall cavity.

Figure 3.3: The Gree outdoor condenser unit, featuring the GREE logo and inverter technology label.

Figure 3.4: Two remote controls for operating the Gree Multi21+ system, each controlling an individual indoor unit.
4. Opsætning og installation
The installation of the Gree Multi21+ Dual-Zone Concealed Duct Mini Split Air Conditioner Heat Pump is complex and requires specialized knowledge and tools. It is mandatory that installation be performed by a state-licensed HVAC contractor to ensure proper function, safety, and warranty eligibility.
Vigtige overvejelser ved installationen omfatter:
- Proper sizing and placement of indoor and outdoor units.
- Installation of refrigerant line sets (1/4" x 1/2" line set x2 required, not included).
- Electrical wiring according to local codes (208/230V).
- Ductwork design and installation for concealed indoor units.
- Condensate drainage system setup.
- System evacuation and refrigerant charging.
Refer to the separate detailed installation manual provided with the product for specific instructions, diagrams, and safety precautions for licensed professionals.
5. Betjeningsvejledning
Each indoor unit is controlled independently by its dedicated remote control. Familiarize yourself with the remote control functions for optimal comfort.
5.1 Grundlæggende betjening
- Tænd/sluk: Press the 'On/Off' button to start or stop the unit.
- Valg af tilstand: Use the 'Mode' button to cycle through operating modes: Cool, Heat, Fan, Dry, Auto.
- Temperaturjustering: Use the 'Up' and 'Down' arrow buttons to set your desired temperature.
- Blæserhastighed: Adjust fan speed using the 'Fan' button (Auto, Low, Medium, High).
5.2 avancerede funktioner
- Timer funktion: Indstil enheden til at tænde eller slukke automatisk på et bestemt tidspunkt.
- Sove mode: Optimizes temperature and fan speed for comfortable sleep.
- Swing funktion: Adjusts the airflow direction.

Figure 5.1: The system provides both cooling (left) and heating (right) capabilities for year-round comfort.
6. Vedligeholdelse
Regular maintenance ensures the longevity and efficient operation of your Gree Multi21+ system. Always disconnect power to the unit before performing any maintenance.
6.1 Rengøring af luftfilter
The indoor units are equipped with air filters that should be cleaned regularly (typically every 2-4 weeks, depending on usage and air quality). Refer to the indoor unit's specific instructions for filter access and cleaning procedures.
- Fjern forsigtigt luftfiltrene.
- Rengør filtrene med en støvsuger eller vask med lunkent vand og et mildt rengøringsmiddel.
- Lad filtrene tørre helt, før de monteres igen.
6.2 Vedligeholdelse af udendørsenhed
The outdoor unit's coils can accumulate dirt and debris, reducing efficiency. Periodically inspect and clean the outdoor coil. This task is best performed by a qualified technician.
6.3 Professionel inspektion
It is recommended to have a licensed HVAC technician perform a professional inspection and tune-up of your system annually. This includes checking refrigerant levels, electrical connections, and overall system performance.
7. Fejlfinding
Før du kontakter service,view følgende almindelige problemer og løsninger:
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Enheden tænder ikke | No power, remote control batteries low, circuit breaker tripped. | Kontroller strømforsyningen, udskift fjernbetjeningens batterier, nulstil afbryderen. |
| Utilstrækkelig køling/opvarmning | Snavsede luftfiltre, blokeret udendørsenhed, forkert indstilling af tilstand, lavt kølemiddelniveau. | Clean air filters, clear obstructions from outdoor unit, verify mode, contact technician for refrigerant check. |
| Usædvanlig støj | Loose parts, foreign objects, compressor issue. | Inspect for loose parts, remove foreign objects, contact technician if noise persists. |
| Vandlækage | Blocked condensate drain, improper installation. | Clear drain line, contact technician for inspection. |
If the problem persists after attempting these solutions, contact a qualified HVAC service technician.
8. Specifikationer
The following table outlines the general specifications for the Gree Multi21+ Dual-Zone Concealed Duct Mini Split Air Conditioner Heat Pump, Model MULTI24CDUCT205:
| Specifikation | Værdi |
|---|---|
| Mærke | GRØT |
| Modelnummer | MULTI24CDUCT205 |
| Kapacitet | 2 tons (24,000 BTU) |
| Sæsonbestemt energieffektivitetsforhold (SEER) | 21 |
| Voltage | 230 volt |
| Støjniveau (udendørsenhed) | 50 decibel |
| Kølemiddel | R410A |
| Installationstype | Split System (Concealed Duct) |
| Materiale Type | Stål |
| Speciel funktion | Air Purification Filter |
| Vægt (udendørsenhed) | 153 pund |
| Produktmål (udendørsenhed) | 17 x 38 x 31 tommer |
8.1 enhedsdimensioner

Figure 8.1: Dimensions for various BTU capacities of Gree Duct-A indoor and outdoor units. Refer to this table for specific measurements relevant to your 18,000 BTU indoor units and 24,000 BTU outdoor unit.
9. Garanti og support
Gree provides a manufacturer's warranty for this product:
- 5 år på reservedele
- 7 Years on Compressor
Please Note: To be eligible for the manufacturer's warranty, installation must be performed by a state-licensed HVAC contractor.
For technical support, service inquiries, or warranty claims, please contact your installing HVAC contractor or refer to the official Gree webhjemmeside for kontaktoplysninger til kundeservice.





