1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your NJOY Aten Pro 3000 Uninterruptible Power Supply (UPS). Please read this manual thoroughly before installing or operating the unit. Keep this manual in a safe place for future reference.
The Aten Pro Series is a commercial online tower UPS designed for various market segments, specifically for business electronics. It is a powerful UPS featuring multiple technical characteristics required in its segment. The 1 to 3 kVA tower units are single-phase with a power factor of 0.9 and high efficiency up to 95% for commercial power supply applications. This UPS series is recommended for network devices, PCs (found in environments such as offices, schools, educational laboratories, sales counters), small servers, and industrial configurations.
2. Important Safety Information
WARNING: Failure to follow these safety instructions can result in fire, electric shock, or serious injury.
- This UPS contains hazardous voltages. Do not attempt to disassemble the unit. Servicing should only be performed by qualified personnel.
- Do not connect non-computer-related items such as medical equipment, life support equipment, microwave ovens, or vacuum cleaners to the UPS.
- Ensure the UPS is connected to a grounded AC power outlet.
- Do not block the ventilation openings of the UPS. Ensure adequate airflow around the unit.
- Do not expose the UPS to rain, water, or excessive humidity.
- Position the UPS away from direct sunlight, heat sources, and flammable materials.
- In case of emergency, press the OFF button and disconnect the power cord from the AC power supply to disable the UPS.
- Battery replacement should only be performed by qualified service personnel.
3. Product Overview
3.1 Package Contents
Carefully unpack the UPS and inspect its contents. The package should include:
- NJOY Aten Pro 3000 UPS Unit
- User Manual
- USB Cable
- RS232 Cable
- Power Cord(s)
3.2 Unit Features
The NJOY Aten Pro 3000 UPS offers advanced features for reliable power protection:
- Online (VFI) Double Conversion Technology
- Pure Sine Wave Output
- High Output Power Factor (0.9)
- High Efficiency (up to 95%)
- LCD Display for real-time status
- Multiple Communication Ports (USB, RS232, SNMP Slot)
- Eco Mode for energy saving
- Zero Transfer Time

Figure 1: NJOY Aten Pro 3000 Uninterruptible Power Supply. This image shows the main product unit, a black tower-style UPS with a prominent LCD screen and control buttons on the front panel.
3.3 Front Panel

Figure 2: Front panel of the NJOY Aten Pro 3000 UPS. The image highlights key specifications such as 3000 VA, 2700 W, 6x 12V@9Ah batteries, and its 'ON-LINE' operational status, indicating double conversion technology.
3.4 Rear Panel Connections

Figure 3: Rear panel of the NJOY Aten Pro 3000 UPS. The image clearly labels the various connection points: (1) RS232 Interface, (2) SCHUKO Outputs (4 ports), (3) Circuit Breaker, (4) SNMP Slot, (5) USB Interface, and (6) AC Input.
4. Setup and Installation
4.1 Unpacking
- Carefully remove the UPS from its packaging.
- Inspect the unit for any shipping damage. If damage is found, do not operate the unit and contact your dealer.
- Retain the packaging materials for future transport or storage.
4.2 Placement
- Place the UPS in a clean, dry, and well-ventilated area.
- Avoid locations with excessive dust, humidity, or extreme temperatures.
- Ensure there is sufficient clearance (at least 20 cm) around the unit for proper airflow.
- The UPS is heavy; ensure it is placed on a sturdy, level surface.
4.3 Initial Connection
- Connect to AC Power: Plug the UPS power cord into a grounded AC power outlet. The UPS will begin charging its internal batteries. For optimal performance, charge the batteries for at least 8 hours before initial use.
- Connect Equipment: Plug your critical equipment (computers, monitors, network devices) into the Schuko output receptacles on the rear panel of the UPS. Do not overload the UPS beyond its rated capacity.
- Communication Ports: Connect the USB or RS232 cable from the UPS to your computer for monitoring and management software functionality. An optional SNMP card can be installed in the SNMP slot for network monitoring.
5. Operating Instructions
5.1 Powering On/Off
- To Power On: Press and hold the 'ON/MUTE' button for approximately 2 seconds. The UPS will perform a self-test, and the LCD display will illuminate.
- To Power Off: Press and hold the 'OFF/ENTER' button for approximately 2 seconds. The UPS will shut down, and the LCD display will turn off.
5.2 LCD Display and Control Buttons
The LCD display provides real-time status information about the UPS, including input/output voltage, battery level, load level, and operational mode. Use the control buttons ('ON/MUTE', 'SELECT', 'OFF/ENTER') to navigate through the display menus and configure settings.
5.3 Runtime Information
The NJOY Aten Pro 3000 UPS provides varying backup times depending on the connected load. The graph below illustrates the approximate runtime at different load levels.

Figure 4: Running time on battery. This graph illustrates the approximate battery runtime of the NJOY Aten Pro 3000 UPS at various load levels. For example, at 100% load (2700W), the runtime is approximately 3 minutes, while at 25% load (675W), it extends to about 26 minutes.
6. Software Management
The NJOY Aten Pro 3000 UPS can be monitored and managed using dedicated software. This software allows for comprehensive control and oversight of your UPS system.

Figure 5: UPS Management Software Interface. This screenshot demonstrates the capabilities of the management software, which includes viewing the operational status, scheduling power on/off events, performing battery tests, and complete configuration of the UPS. The software supports various operating systems like Mac OS, Linux, and Windows.
Key functions of the management software include:
- Viewing operational status and real-time data.
- Scheduling power on/off events and battery tests.
- Complete configuration of UPS settings.
- Event logging and alarm notifications.
7. Maintenance
7.1 Battery Maintenance
- The UPS contains internal, sealed lead-acid batteries that are not user-serviceable.
- For optimal battery life, keep the UPS connected to AC power to ensure batteries remain charged.
- Avoid storing the UPS with discharged batteries for extended periods.
- Battery replacement should only be performed by qualified service personnel.
7.2 Cleaning
- Disconnect the UPS from AC power and all connected equipment before cleaning.
- Use a soft, dry cloth to wipe the exterior surfaces of the UPS.
- Do not use liquid or aerosol cleaners, as they may contain flammable substances or cause electric shock.
- Ensure ventilation openings are free from dust and debris.
8. Troubleshooting
This section provides solutions to common issues you might encounter with your UPS. If the problem persists after attempting these solutions, please contact customer support.
| Symptom | Possible Cause | Solution |
|---|---|---|
| UPS does not turn on | No AC input power; Low battery voltage | Check AC power connection; Charge batteries for at least 8 hours. |
| UPS beeps continuously | Overload; Battery low/fault | Reduce connected load; Allow batteries to charge or replace if faulty. |
| UPS switches to battery mode frequently | Unstable AC input power | Check AC power quality; Ensure input voltage is within specified range. |
| Connected equipment loses power | UPS overload; Battery discharged | Reduce load; Allow batteries to recharge. |
9. Technical Specifications
| Feature | Specification |
|---|---|
| Model | Aten Pro 3000 (PWUP-OL300AP-AZ01B) |
| Power Capacity | 3000 VA / 2700 W |
| Technology | Online (VFI) Double Conversion |
| Output Waveform | Pure Sine Wave |
| Output Power Factor | 0.9 |
| Nominal Input Voltage | 230 V |
| Input Voltage Range | 180 - 280 VAC |
| Input Frequency | 50 Hz / 60 Hz (Auto-sensing) |
| Nominal Output Voltage | 200/208/220/230/240 VAC (Configurable) |
| Outputs | 4 x Schuko Outlets |
| Batteries | 6 x 12 V 9 Ah (Internal, included) |
| Efficiency | Up to 95% |
| Display | LCD Display |
| Communication Ports | RS232, HID USB, SNMP Slot |
| Noise Level | <50 dB |
| Product Dimensions (L x W x H) | 42.1 x 19 x 31.8 cm |
| Weight | 33.1 kg |
10. Warranty and Support
10.1 Warranty Information
NJOY products are manufactured to the highest quality standards. This product is covered by a limited warranty from the date of purchase. Please refer to the warranty card included with your product or visit the official NJOY website for detailed warranty terms and conditions.
10.2 Customer Support
If you encounter any issues or have questions regarding your NJOY Aten Pro 3000 UPS that are not addressed in this manual, please contact NJOY customer support. Contact information can typically be found on the NJOY website or on your product packaging.





