1. Sarrera
This manual provides essential information for the safe and efficient operation of your COTEK SD3500-112 GFCI Pure Sine Wave Inverter. The SD3500 series offers advanced features such as parallel connectivity, an integrated AC circuit breaker, and an automatic transfer switch (ATS) for a reliable and secure power supply. Please read this manual thoroughly before installation and use to ensure proper functionality and to prevent damage to the unit or connected devices.
2. Segurtasun informazioa
Beti jarraitu segurtasun neurri hauek deskarga elektriko, sute edo lesio arriskua murrizteko.
- Segurtasun elektrikoa: Ez ireki inbertsorearen casing. Ez dago erabiltzaileak konpondu beharreko piezarik barruan. Konponketa guztiak langile kualifikatuen esku utzi.
- Aireztapena: Ziurtatu aireztapen egokia dagoela inbertsorearen inguruan. Ez blokeatu aireztapen-irekidurak.
- Ingurumena: Install the inverter in a dry, cool, and well-ventilated area, away from flammable materials, corrosive chemicals, and direct sunlight.
- Bateria konexioa: Connect the inverter directly to a 12V DC battery bank using appropriate gauge cables. Ensure correct polarity (+ to + and - to -). Reverse polarity will damage the inverter.
- Lurreratzea: Properly ground the inverter chassis to a reliable earth ground.
- Karga-gaitasuna: Do not exceed the inverter's rated output power (3500W continuous). Overloading can cause damage and fire hazards.
- GFCI babesa: The integrated GFCI outlets provide protection against ground faults. Test the GFCI regularly as per local electrical codes.
3. Produktuaren ezaugarriak
The COTEK SD3500-112 GFCI Inverter is designed with advanced functionalities for robust performance:
- Uhin sinusoidal hutsaren irteera: Korronte alterno garbi eta egonkorra eskaintzen du, elektronika sentikorrerako egokia.
- Parallel Redundancy Design: Allows for power expansion and enhanced reliability by connecting multiple inverters.
- Automatic Master Mechanism: Optimizes reliability and eliminates single points of failure in multi-inverter setups.
- Built-in Automatic Transfer Switch (ATS): Seamlessly switches between grid power and battery power for uninterrupted supply.
- Integrated AC Circuit Breaker: Provides protection for the AC output.
- Remote Control & Monitoring: Supports optional remote control (CR-10) and internet connectivity via built-in Ethernet for control from anywhere.
- Selectable Output Voltage/Power Saving Mode: Configurable via DIP switches or remote control.
- Babes integralak: Includes reverse polarity (fuse), under/over voltage, short circuit, overload, over temperature, and over voltagbabesa
- Zabala DC Sarrera Voltage Barrutia: Accommodates various applications and extreme conditions.
4. Produktua amaitu daview
Familiarize yourself with the components and connections of your SD3500-112 GFCI inverter.

4.1 irudia: Goiko aurrealdea view of the COTEK SD3500-112 GFCI Inverter, showing the main casing and output receptacles.

Figure 4.2: Rear panel of the inverter, detailing the DC input terminals, AC input/output, GFCI outlets, RS-232 remote port, and circuit breaker.

4.3. irudia: Aldea view showing the cooling fans, essential for maintaining optimal operating temperature.
5. Konfigurazioa eta instalazioa
Instalazio egokia ezinbestekoa da inbertsorearen errendimendu eta segurtasunerako.
- Muntaketa: Choose a secure, dry, and well-ventilated location. Ensure sufficient clearance for airflow around the inverter, especially near the cooling fans.
- DC sarrerako konexioa:
- Connect the positive (+) terminal of the 12V battery bank to the positive (+) DC input terminal on the inverter.
- Connect the negative (-) terminal of the 12V battery bank to the negative (-) DC input terminal on the inverter.
- Erabili tamaina egokiko kableak bolumena gutxitzekotage drop and ensure safe operation. Refer to electrical guidelines for cable sizing based on current and distance.
- Ziurtatu konexio guztiak estu eta seguru daudela.
- Lurreratzea: Connect the inverter chassis to a reliable earth ground using a suitable grounding wire.
- Korronte alternoko irteerako konexioa:
- Plug your AC appliances directly into the GFCI outlets on the inverter.
- For hardwired applications, consult a qualified electrician to connect to the AC output terminals.
- AC Input Connection (for ATS function): If using the automatic transfer switch, connect a reliable AC power source (e.g., shore power, generator) to the AC input terminals.
- Urruneko kontrola (aukerakoa): If using a remote control unit (e.g., CR-10), connect it to the designated RS-232 port.
Garrantzitsua: Always ensure the inverter is OFF before making any connections.
6. Funtzionamendua
Follow these steps to operate your COTEK SD3500-112 GFCI inverter:
- Piztu: Ensure all DC and AC connections are secure. Switch the inverter's main power switch to the "ON" position.
- Egoeraren Adierazleak: Observe the LED indicators on the inverter (if present) for status such as power, fault, or overload. Refer to the full manual for detailed indicator meanings.
- Kargak konektatzea: Plug your AC appliances into the GFCI outlets. Ensure the total wattagKonektatutako etxetresna elektrikoen potentzia ez da 3500W-tik gorakoa.
- GFCI proba: Periodically press the "TEST" button on the GFCI outlets to ensure they are functioning correctly. Press "RESET" after testing.
- Energia aurrezteko modua: If configured, the inverter may enter a power-saving mode when no load or a very light load is detected, reducing quiescent current draw.
- Automatic Transfer Switch (ATS): If an AC input source is connected, the inverter will automatically switch to that source when available, prioritizing it over battery power. When the AC input is lost, it will switch back to inverter (battery) power.
- Itzali: Disconnect all AC loads, then switch the inverter's main power switch to the "OFF" position.
7. Mantentzea
Mantentze-lan erregularrak zure inbertsorearen iraupena eta funtzionamendu fidagarria bermatzen ditu.
- Garbiketa: Keep the inverter clean and free from dust and debris. Use a dry cloth to wipe the exterior. Do not use liquid cleaners.
- Aireztapena: Ensure cooling vents are clear and unobstructed. Periodically check for dust buildup in the fan areas.
- Konexioak: Periodically check all DC and AC connections for tightness. Loose connections can cause overheating and poor performance.
- Bateria osasuna: Monitor the health of your battery bank. A weak battery can affect inverter performance.
- GFCI proba: Test the GFCI outlets monthly to ensure proper function.
8. Arazoak
Atal honek zure inbertsorearekin izan ditzakezun arazo ohikoenak jorratzen ditu.
| Arazoa | Kausa posiblea | Irtenbidea |
|---|---|---|
| AC irteerarik ez | Inverter OFF, low battery voltage, overload, internal fault, tripped AC breaker. | Ensure inverter is ON. Check battery voltage. Reduce load. Reset AC breaker. If fault persists, contact support. |
| Overload alarm/shutdown | Konektatutako kargak inbertsorearen etengabeko edo goranzko potentzia-balorazioa gainditzen du. | Disconnect some appliances. Restart inverter. Ensure total load is within specifications. |
| Bateria baxuaren alarma/itzaltzea | Bateria boltage baxuegia da. | Recharge batteries. Check battery connections and health. |
| Inbertsorearen gainberotzea | Poor ventilation, excessive ambient temperature, prolonged high load. | Ensure clear airflow around vents. Reduce ambient temperature. Reduce load. |
| GFCI maiz bidaiatzen du | Ground fault in connected appliance or wiring. | Disconnect appliances one by one to identify the faulty device. Inspect wiring for damage. |
For issues not listed here or if troubleshooting steps do not resolve the problem, please contact COTEK customer support.
9. Zehaztapenak
Technical specifications for the COTEK SD3500-112 GFCI Pure Sine Wave Inverter.
| Ezaugarri | Xehetasuna |
|---|---|
| Marka | COTEK |
| Ereduaren izena | SD Series (SD3500-112 GFCI) |
| Sarrera boltage | 12 Volts DC |
| Irteera boltage | 120 Volt AC |
| Irteerako etengabeko potentzia | 3500 Watt |
| Surge Potentzia | 6000 VA |
| Irteerako uhin forma | Sine Wave Pure |
| Irteerako maiztasuna | 60 Hz |
| Karga osoan eraginkortasun maximoa | %90 |
| Funtzionamendu-tenperatura-tarte normala | -20 °C eta 60 °C (-4 °F eta 140 °F) |
| Biltegiratze-tenperatura-tartea | -40 °C eta 70 °C (-40 °F eta 158 °F) |
| Elementuaren pisua | 26.5 kilo |
| Neurriak | 11.14" x 5.04" x 19.53" |
| Gomendatutako Erabilerak | Ibilgailua |
| Energia iturria | Bateriaren bidez |
10. Bermea eta Laguntza
The COTEK SD3500-112 GFCI Pure Sine Wave Inverter comes with a 2 urteko fabrikatzailearen bermea.
For technical assistance, warranty claims, or further information, please contact COTEK customer support through their official website or authorized distributors. Please have your model number (SD3500-112 GFCI) and purchase details ready when contacting support.