1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your Gree Multi21+ Dual-Zone Mini Split Air Conditioner and Heat Pump system. Please read this manual thoroughly before operating the unit and retain it for future reference. Proper installation and maintenance are crucial for optimal performance and longevity of the system.
2. Safety Information
Important Safety Instructions:
- Installation must be performed by a qualified and certified HVAC technician in accordance with all local and national electrical and safety codes.
- Do not attempt to repair or service the unit yourself. Refer all servicing to qualified personnel.
- Ensure the power supply is disconnected before any maintenance or cleaning procedures.
- Use only the specified refrigerant (R410A) and ensure proper handling to prevent environmental harm.
- Keep children and pets away from the outdoor unit during operation.
- Do not block the air intake or outlet of either the indoor or outdoor units.
3. Product Overview
3.1 System Components
The Gree Multi21+ Dual-Zone system consists of an outdoor condenser unit, two indoor wall-mounted units, and two remote controls.
Image 3.1.1: Complete Gree Multi21+ Dual-Zone Mini Split System. This image displays the outdoor condenser unit, two indoor wall-mounted units, and two handheld remote controls, illustrating the full system configuration.
3.2 Key Features
- Dual-Zone Comfort: Independently control two separate indoor zones.
- G10 Inverter Technology: Provides energy savings, reduced noise, and stable temperature control.
- Built-In Wi-Fi: Allows for remote control and monitoring via a smartphone application.
- Heating & Cooling: Operates as both an air conditioner and a heat pump.
- High SEER Rating: SEER 21 for efficient operation.
Image 3.2.1: Icons representing key features of the Gree Multi21+ system, including a 5-year limited parts warranty, Wi-Fi readiness, heating and cooling capabilities, ETL listing, G10 Inverter Technology, AHRI certification, and Energy Star rating.
3.3 Specifications
| Specification | Value |
|---|---|
| Model Number | MULTI18CLIVV200 |
| Outdoor Unit Model | MULTI18HP230V1CO |
| Indoor Unit Model (x2) | LIVV09HP230V1AHW |
| Total Cooling/Heating Capacity | 18,000 BTU |
| SEER (Seasonal Energy Efficiency Ratio) | 21 |
| Voltage | 208/230V |
| Refrigerant | R-410A |
| Noise Level (Outdoor Unit) | 59 Decibels |
| Room Coverage | 600 - 1,000 sqft |
Image 3.3.1: A table detailing the width, height, and depth measurements for various BTU sizes of LIVV Gen 3 Multi indoor and outdoor units. This specific system uses 9,000 BTU indoor units and an 18,000 BTU outdoor unit.
4. Setup and Installation
Professional Installation Required: Due to the complexity of refrigerant lines, electrical connections, and system charging, professional installation by a certified HVAC technician is mandatory for this unit. Improper installation can lead to system damage, safety hazards, and void the warranty.
4.1 Site Selection
- Indoor Units: Select locations that allow for even air distribution within the designated zones. Ensure sufficient clearance around the unit for airflow and maintenance.
- Outdoor Unit: Choose a location with good airflow, away from direct sunlight or heat sources, and on a stable, level surface. Ensure adequate clearance for service access and proper ventilation.
Image 4.1.1: An illustrative floor plan demonstrating potential placements for indoor and outdoor mini-split units to achieve multi-zone climate control within a home, showing different temperature settings in various rooms.
4.2 Line Set Requirements
This system requires two 1/4" x 3/8" line sets (not included) to connect the indoor units to the outdoor unit. The length of the line sets will depend on the installation layout.
5. Operating Instructions
Your Gree Multi21+ system is controlled primarily via the wireless remote control or the built-in Wi-Fi feature.
Image 5.0.1: The remote control for the Gree Mini Split System, featuring an LCD display and buttons for mode selection, fan speed, swing, sleep, timer, and other functions.
5.1 Remote Control Functions
- POWER Button: Turns the unit ON or OFF.
- MODE Button: Cycles through operating modes: Auto, Cool, Dry, Fan, Heat.
- FAN Button: Adjusts fan speed (Auto, Low, Med, High).
- TEMP ▲/▼ Buttons: Adjusts the desired temperature setting.
- SWING Button: Controls the vertical louver movement for air distribution.
- SLEEP Button: Activates sleep mode for energy-efficient and quiet operation during sleep.
- TIMER ON/OFF: Sets a timer for the unit to turn ON or OFF automatically.
- I FEEL Button: Activates the 'I Feel' function, which senses the temperature at the remote control's location for more precise comfort.
- X-FAN Button: Activates the X-Fan function to dry the indoor coil after cooling operation, preventing mold and mildew.
5.2 Operating Modes
- COOL Mode: Provides cooling. Set desired temperature.
- HEAT Mode: Provides heating. Set desired temperature.
- DRY Mode: Dehumidifies the room.
- FAN Mode: Circulates air without heating or cooling.
- AUTO Mode: The unit automatically selects the appropriate mode (Cool, Heat, or Fan) based on the room temperature and your set temperature.
5.3 Wi-Fi Connectivity
The indoor units feature built-in Wi-Fi, eliminating the need for a separate Wi-Fi kit. Refer to the dedicated Wi-Fi setup guide (usually provided separately or available online) for instructions on connecting your unit to your home network and controlling it via the Gree+ app.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your Gree Multi21+ system. Always disconnect power before performing any maintenance.
6.1 Indoor Unit Filter Cleaning
The air filters in the indoor units should be cleaned every two weeks or more frequently depending on usage and air quality.
- Open the front panel of the indoor unit.
- Remove the air filters.
- Clean the filters with a vacuum cleaner or wash them with lukewarm water and mild detergent. Allow them to dry completely before reinstallation.
- Reinstall the dry filters and close the front panel.
6.2 Outdoor Unit Cleaning
The outdoor unit's coils and fins should be kept free of dirt, leaves, and other debris. Periodically inspect and gently clean the outdoor unit with a soft brush or water hose. Avoid bending the fins.
Image 6.2.1: A detailed view of the Gree Multi21+ outdoor condenser unit, highlighting its protective grille and fan assembly, which requires periodic cleaning to maintain efficiency.
6.3 Professional Servicing
It is recommended to have your system professionally inspected and serviced by a qualified technician annually to ensure optimal performance, check refrigerant levels, and clean internal components.
7. Troubleshooting
Before contacting service, review the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not start | No power; remote control batteries dead; circuit breaker tripped. | Check power supply, replace remote batteries, reset circuit breaker. |
| Insufficient cooling/heating | Dirty air filters; blocked outdoor unit; wrong mode selected; temperature setting incorrect. | Clean filters, clear obstructions from outdoor unit, select correct mode, adjust temperature. |
| Unusual noise | Loose parts; debris in fan; refrigerant flow noise (normal). | Inspect for loose parts or debris. If persistent or loud, contact service. |
| Water leakage from indoor unit | Clogged drain pipe; improper installation. | Contact a qualified technician for inspection and repair. |
If the problem persists after attempting these solutions, or if you encounter an error code, please contact a qualified HVAC technician for assistance.
8. Warranty Information
The Gree Multi21+ system comes with a 5-year limited parts warranty. For specific terms, conditions, and registration details, please refer to the warranty card included with your product or visit the official Gree website. Keep your proof of purchase for warranty claims.
9. Customer Support
For further assistance, technical support, or to locate a certified service provider, please visit the GREE Store on Amazon or the official Gree website.
