1. Introdución
This manual provides essential information for the safe and efficient operation of your COTEK SP-3000-212 High Frequency Pure Sine Wave Inverter. This device is designed to convert 12VDC battery power into 230VAC pure sine wave electricity, suitable for a wide range of sensitive electronic equipment. Please read this manual thoroughly before installation and use to ensure proper function and to prevent damage to the unit or connected devices.

Image 1.1: Front-top view of the COTEK SP-3000-212 Pure Sine Wave Inverter, showcasing its blue and gray casing con reixas de ventilación.
2. Información de seguridade
Observe sempre as seguintes precaucións de seguridade para reducir o risco de descarga eléctrica, incendio ou lesións:
- A instalación só debe ser realizada por persoal cualificado.
- Garantir unha ventilación adecuada ao redor do inversor para evitar o sobreenriquecido.
- Non expoña o inversor á auga, á choiva ou a humidade excesiva.
- Verify that the input DC voltage matches the inverter's specifications (12VDC).
- Connect the inverter to a properly grounded electrical system.
- Non abra o inversor casing; non hai pezas no interior que o usuario poida reparar.
- Aviso: This product may contain materials cautioned by California Proposition 65.
3. Características clave
The COTEK SP-3000-212 Inverter incorporates advanced features for reliable power conversion:
- Saída de onda sinusoidal pura: Proporciona enerxía limpa e estable axeitada para electrónica sensible.
- Capacidade de control remoto: Features a Power ON / OFF remote control terminal (Green Terminal) for convenient operation.
- Input & Output Isolation: Ensures safety and prevents interference between input and output circuits.
- Temperature & Load Controlled Cooling Fan: Automatically adjusts fan speed based on internal temperature and load to optimize cooling and reduce noise.
- Interface fácil de usar: Deseñado para facilitar o seu uso.
- Selectable Output Frequency: Output frequency (50/60 Hz) can be selected via DIP switches.
- Selectable Output Voltage: Vol. De saídatage can be selected via DIP switches.
- Modo de aforro de enerxía: Adjustable via a variable resistor to conserve battery power.
- Construción duradeira: Housed in a robust aluminum casing.
- Indicadores de estado: Features 3-color LED indicators for operational status.
- Protección integral: Includes input protection (Reverse Polarity with fuse, Under Voltage, Over Voltage) and output protection (Short Circuit, Overload, Over Temperature).
- Certificacións: E13 / UL / CE / FCC approved.
4. Configuración e instalación
Proper installation is crucial for the inverter's performance and safety. Ensure the installation environment is dry, well-ventilated, and free from flammable materials.
4.1 Montaxe
Mount the inverter securely on a stable, non-combustible surface. Allow sufficient clearance around the unit for airflow, especially around the cooling fan vents.
4.2 Conexión de entrada de CC
Connect the 12VDC battery bank to the DC input terminals on the rear of the inverter. Ensure correct polarity: positive to positive (red) and negative to negative (black). Use appropriately sized cables to minimize voltagcae.

Image 4.1: Rear panel of the inverter, showing the hardwire AC output terminal, power switch, DIP switches, and remote control port.

Image 4.2: Rear panel of the inverter, showing the DC input terminals (red for positive, black for negative), ground lug, and cooling fan grilles.
4.3 Conexión de saída de CA
Connect your AC loads to the hardwire AC output terminal. Ensure all AC wiring complies with local electrical codes and standards. The inverter provides 230VAC output.
4.4 Conexión a terra
Connect the inverter's chassis ground terminal to a reliable earth ground. This is essential for safety and to prevent electrical noise.
4.5 Control remoto (opcional)
If using a remote control unit (e.g., CR-8 or CR-16A, sold separately), connect it to the designated remote control port on the inverter's rear panel.

Image 4.3: Mechanical drawings providing detailed dimensions of the COTEK SP-3000-212 Inverter for installation planning.
5. Instrucións de funcionamento
5.1 Acendido/Apagado
To power on the inverter, switch the main power switch on the rear panel to the 'ON' position. The LED indicators will illuminate to show the operational status. To power off, switch the main power switch to 'OFF'. If a remote control is connected, it can also be used to power the unit on or off.
5.2 Output Frequency and Voltage Selección
The inverter's output frequency (50Hz or 60Hz) and voltage can be configured using the DIP switches located on the rear panel. Refer to the product specifications or the label on the unit for the correct DIP switch settings for your desired output.
5.3 Modo de aforro de enerxía
The power saving mode can be adjusted via a variable resistor. This feature allows the inverter to reduce its power consumption when no load or a very light load is detected, extending battery life. Consult the detailed specifications for adjustment procedures.
5.4 indicadores de estado LED
The inverter features 3-color LED indicators that provide visual feedback on its operational status, including normal operation, warnings, and fault conditions. Refer to the specifications table for a detailed explanation of each indicator's meaning.
6. Mantemento
The COTEK SP-3000-212 Inverter is designed for minimal maintenance. However, regular checks can ensure its longevity and optimal performance:
- Limpeza: Keep the inverter's exterior clean and free from dust and debris. Ensure ventilation openings are not obstructed. Use a dry cloth for cleaning.
- Conexións: Periodically check all DC and AC connections to ensure they are tight and free from corrosion. Loose connections can cause overheating and poor performance.
- Ventilación: Ensure the cooling fans are operating correctly and that there is adequate airflow around the unit. The fans are temperature and load controlled, so they may not always be active.
- Ambiente: Confirm the operating environment remains within the specified temperature and humidity ranges.
7 Solución de problemas
The inverter is equipped with various protection features to safeguard itself and connected equipment. If the inverter is not operating as expected, check the following:
- Sen potencia de saída: Comprobe o vol de entrada de CCtage. Ensure the battery is charged and connections are secure. Verify the main power switch is in the 'ON' position.
- Protección contra sobrecarga: If the connected load exceeds the inverter's capacity (3000W continuous, 6000VA surge), the inverter will shut down. Reduce the load and restart the inverter.
- Protección contra sobretemperatura: If the internal temperature becomes too high, the inverter will shut down. Ensure adequate ventilation and clear any obstructions from the cooling vents. Allow the unit to cool down before restarting.
- Under/over Voltage Protección: The inverter will shut down if the input DC voltage is too low or too high. Check the battery voltage sistema de carga.
- Protección contra curtocircuítos: If a short circuit occurs on the AC output, the inverter will shut down. Disconnect the load, resolve the short circuit, and then restart the inverter.
- Indicadores LED: Observe the 3-color LED indicators for specific fault codes or warnings. Refer to the specifications for interpretation.
If the issue persists after performing these checks, contact qualified service personnel.
8. Especificacións
Detailed technical specifications for the COTEK SP-3000-212 Inverter:

Image 8.1: Comprehensive table detailing the electrical, environmental, safety, and mechanical specifications for the COTEK SP-3000 series, including the SP-3000-212 model.
| Característica | Especificación |
|---|---|
| Marca | COTEK |
| Número de modelo | SP-3000-212 |
| Nome do modelo | Serie SP3000 |
| Nome do tipo de elemento | Inversor |
| Fonte de enerxía | Alimentado por batería |
| Vol. De entradatage | 12 voltios DC |
| Vol. De saídatage | 230 voltios AC |
| Wattage (Continuo) | 3000 vatios |
| Potencia de saída (pico) | 6000 vatios (sobretensión) |
| Frecuencia | 50/60 Hz (Selectable) |
| Forma de onda de saída | Pura Sine Wave |
| Standby Power Shutoff | Alta Eficiencia |
| Peso do elemento | 19 libras (8.6 kg) |
| Cor | Azul |
| UPC | 688907812003 |
| Número de peza do fabricante | SP-3000-212 |
9. Garantía e soporte
9.1 Garantía do fabricante
The COTEK SP-3000-212 Inverter comes with a Garantía do fabricante de 2 anos. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by improper installation, misuse, unauthorized modifications, or natural disasters.
9.2 Soporte técnico
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact COTEK customer support. Contact information can typically be found on the manufacturer's official websitio web ou na embalaxe do produto.
9.3 Accesorios
Optional accessories, such as remote controllers (CR-8, CR-16A) and by-pass switches (TR-40), are sold separately and can enhance the functionality of your inverter. Refer to the COTEK product catalog for more details.