1. Introduction
Thank you for choosing the LEADZM 12000 BTU 115V 19 SEER Mini Split AC/Heating System. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your unit. Please read this manual thoroughly before installation and use, and retain it for future reference.
Safety Precautions
- Always ensure the unit is properly grounded.
- Do not attempt to repair or modify the unit yourself. Contact qualified service personnel.
- Ensure the power supply voltage matches the unit's specifications (115V).
- Keep the indoor and outdoor units clear of obstructions to ensure proper airflow.
- Turn off the power supply before performing any maintenance or cleaning.
2. Product Components
The LEADZM Mini Split AC/Heating System package includes the following main components and accessories:
- Indoor Unit (Evaporator)
- Outdoor Unit (Condenser)
- Multifunctional Remote Control
- 16.4 ft Line Kit (Refrigerant Lines and Communication Cable)
- Drain Hose
- Insulation Tape
- Power Cable (for indoor unit)

Image 2.1: Overview of the LEADZM Mini Split AC/Heating System components, including the indoor unit, outdoor unit, remote control, and installation accessories.
3. Installation Guide
Important: Professional installation of this system is required. Improper installation can lead to refrigerant leakage, electric shock, fire, or other hazards. This guide provides general information; always refer to local codes and professional HVAC practices.
3.1 Pre-Installation Checks
- Voltage Confirmation: Verify that your electrical supply is 115V/60Hz, matching the unit's requirements.
- Area Assessment: Ensure the recommended area for the 12000 BTU unit (450-750 sq.ft.) is suitable for your space.
- Package Contents: Confirm all components listed in Section 2 are present. Note that units may be delivered in two separate packages on different days.
3.2 Unit Dimensions and Placement
Consider the following dimensions for proper placement and clearance:
- Indoor Unit (W x D x H): 31.92'' x 8.07'' x 11.49''
- Outdoor Unit (W x D x H): 28.66'' x 12.01'' x 21.65''

Image 3.1: Diagram illustrating the dimensions and weights of the indoor and outdoor units, along with the length of the copper wire.
3.3 Refrigerant Line and Electrical Connections
- The system comes pre-charged with R410A refrigerant for line lengths up to 25 feet. The included line kit is 16.4 feet.
- Connect the refrigerant lines between the indoor and outdoor units according to the manufacturer's instructions.
- Connect the electrical wiring, ensuring proper grounding and adherence to the wiring diagram.
3.4 System Vacuuming and Leak Testing
- After connecting the refrigerant lines, it is crucial to vacuum the system to remove all air and moisture. This step is essential for optimal performance and longevity.
- Perform a leak test on all connections using an appropriate leak detection method.
4. Operating Instructions
Your LEADZM Mini Split system is designed for user-friendly operation via the multifunctional remote control.
4.1 Remote Control Overview
The remote control allows access to all functions of your AC/Heating system. Familiarize yourself with the buttons and their corresponding indicators on the remote's display.

Image 4.1: The multifunctional remote control, highlighting various features such as timing, precise temperature regulation, ECO mode, powerful cooling/heating, and inverter system.
4.2 Basic Operation
- Power On/Off: Press the POWER button to turn the unit on or off.
- Temperature Adjustment: Use the TEMP UP/DOWN buttons to set your desired temperature (range: 61℉ - 88℉).
- Fan Speed: Press the FAN button to cycle through available fan speeds (e.g., Low, Medium, High, Auto).
4.3 Operating Modes
Press the MODE button to select from the following operating modes:
- Cool Mode: Provides rapid cooling for your space.
- Heat Mode: Provides efficient heating.
- Fan Mode: Circulates air without heating or cooling.
- ECO Mode: Optimizes energy consumption for efficient operation.
4.4 Special Functions
- Sleep Mode: Adjusts temperature and fan speed automatically for comfortable sleep and reduced energy consumption.
- Turbo Mode: Activates maximum fan speed and compressor output for rapid cooling or heating.
- Mute Mode: Operates the unit at its lowest noise level (as low as 17dB).
- 24 Hour Timer: Set the unit to turn on or off automatically at a specified time.
- Swing Function: Controls the vertical airflow direction. The unit features a 4-way swing for optimal air distribution.
- Display Button: Toggles the indoor unit's display on or off.

Image 4.2: The indoor unit operating in Mute Mode, emphasizing its ultra-quiet performance, ideal for undisturbed rest.

Image 4.3: The indoor unit demonstrating rapid cooling and heating capabilities, achieving desired temperatures quickly.
5. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your LEADZM Mini Split system. Always disconnect power before performing maintenance.
5.1 Air Filter Cleaning
- The indoor unit's air filters should be cleaned every two weeks or more frequently depending on usage and air quality.
- Open the front panel of the indoor unit and carefully remove the filters.
- Wash filters with lukewarm water and a mild detergent. Rinse thoroughly and allow them to air dry completely before reinstallation.
5.2 Outdoor Unit Cleaning
- Periodically check the outdoor unit for debris, leaves, or dirt that may obstruct airflow.
- Gently clean the coil fins with a soft brush or vacuum cleaner. Avoid bending the fins.
- Ensure the drainage holes at the base of the outdoor unit are clear.
5.3 Seasonal Checks
- Before the cooling season, check for any unusual noises or vibrations.
- Before the heating season, ensure the outdoor unit is clear of snow and ice.
- Consider scheduling a professional inspection annually to ensure all components are functioning correctly and refrigerant levels are adequate.
6. Troubleshooting
This section addresses common issues you might encounter. For problems not listed here or if solutions do not resolve the issue, contact qualified service personnel.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not start | No power supply Remote control batteries low | Check circuit breaker Replace remote control batteries |
| Insufficient cooling/heating | Dirty air filters Blocked outdoor unit Temperature setting incorrect Doors/windows open | Clean air filters Clear obstructions Adjust temperature Close doors/windows |
| Unusual noise | Loose parts Obstruction in fan | Contact service personnel Turn off unit and check for obstructions (if safe) |
| Water leakage from indoor unit | Clogged drain hose Improper installation | Clear drain hose Contact service personnel for inspection |
7. Specifications
Technical specifications for the LEADZM 12000 BTU 115V 19 SEER Mini Split AC/Heating System:
- Model: LZ-12K-115V-split
- Cooling/Heating Capacity: 12,000 BTU
- Voltage: 115V / 60Hz
- Seasonal Energy Efficiency Ratio (SEER): 19
- Recommended Area: 450-750 sq.ft.
- Noise Level (Indoor Unit): 27-42 dBa (as low as 17dB in Mute Mode)
- Wattage: 3517 watts
- Refrigerant: R 410A (Pre-charged for up to 25 ft line)
- Indoor Unit Dimensions (W x D x H): 31.92'' x 8.07'' x 11.49''
- Outdoor Unit Dimensions (W x D x H): 28.66'' x 12.01'' x 21.65''
- Installation Type: Split System
- Special Features: Inverter Technology, Eco-friendly, 4-way Swing, Sleep Mode, Turbo Mode, Mute Mode, 24 Hour Timer.
8. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided with your purchase or contact LEADZM customer service. Professional installation is required to ensure proper operation and may be a condition for warranty validity.





