Introduction
The ASHATA STW5023 is a 5.25-inch bay computer temperature monitor and fan controller designed to provide real-time system temperature monitoring and fan speed management. This device helps maintain optimal operating temperatures for your CPU, HDD, and other system components, preventing overheating and potential hardware damage. It features an LCD display for clear information and user-friendly controls for adjustments.
Safety Information
- Ensure your computer is powered off and unplugged from the wall outlet before installation.
- Handle electronic components with care to avoid electrostatic discharge.
- Do not force connectors. Ensure proper orientation before plugging in cables.
- Keep the device away from liquids and excessive moisture.
- If you are unsure about any installation step, consult a qualified technician.
Package Contents
Verify that all the following items are included in your package:
- ASHATA STW5023 Temperature Monitor and Fan Controller
- Mounting Screws
- Temperature Sensor Cables
- Fan Power Cables
- Power Supply Cable

Image: The ASHATA STW5023 unit, four mounting screws, and a yellow adhesive strip are shown on a white background.
Setup
1. Physical Installation
- Open your computer case.
- Locate an available 5.25-inch drive bay.
- Slide the ASHATA STW5023 unit into the 5.25-inch drive bay from the front of the case.
- Secure the unit with the provided mounting screws on both sides of the drive bay.

Image: A person's hands are shown inserting the ASHATA STW5023 unit into an empty 5.25-inch drive bay on the front of a computer case.
2. Cable Connections
- Power Connection: Connect the 4-pin Molex power connector from the STW5023 to an available 4-pin Molex connector from your computer's power supply unit (PSU).
- Fan Connections: Connect your case fans to the fan headers on the STW5023. The unit supports up to three fans.
- Temperature Sensor Connections: Attach the temperature sensor probes to the components you wish to monitor (e.g., CPU heatsink, HDD, system area). Connect the other end of the sensor cables to the corresponding ports on the STW5023.

Image: A close-up view of a black 4-pin Molex power connector, typically used for older peripherals or fan controllers.
Operating Instructions
1. Display Overview
The LCD screen displays various system parameters. Refer to the diagram below for an explanation of each indicator:

Image: The ASHATA STW5023 LCD display is shown with various labels indicating the function of each displayed element, such as alarm clock symbol, date, time, fan symbol, alarm display, temperature switch, hard disk running display, power display, fan speed level display, temperature rating, computer temperature, fan speed control, and C/F conversion.
2. Button Functions
- MODE Button: Cycles through different display modes or settings.
- ALARM C/F Button: Used to set the alarm temperature and switch between Celsius and Fahrenheit temperature units.
- SPEED Button: Adjusts the fan speed manually or switches between automatic and manual fan control modes.
3. Setting Alarm Temperature
The alarm temperature can be set manually within a range of 40°C to 90°C. If the computer temperature exceeds this set range or a fan becomes stuck, the alarm will activate automatically to alert you to potential overheating issues.
4. Fan Speed Control
- Automatic Mode: The device intelligently detects computer temperature. When the CPU temperature or a detection point temperature is too high, it automatically increases fan speed. When the computer is idle or temperatures are within the standard range, fan speed is automatically reduced to minimize noise.
- Manual Mode: You can manually adjust the fan speed up or down using the SPEED button to suit your preferences.

Image: The ASHATA STW5023 display shows temperature readings and fan speed indicators, illustrating the manual adjustment capability for computer temperature control.
Maintenance
- Regularly check the temperature sensors to ensure they are securely attached and providing accurate readings.
- Keep the LCD screen clean by gently wiping it with a soft, dry cloth. Avoid abrasive cleaners.
- Ensure proper airflow around the unit within the computer case.
Troubleshooting
- No Display/No Power:
Solution: Check all power connections, especially the 4-pin Molex connector, to ensure it is firmly seated. Verify that your computer's PSU is functioning correctly. - Fan Not Spinning/Incorrect Speed:
Solution: Ensure the fan cables are correctly connected to the STW5023. Check if the fan itself is operational by connecting it directly to a known working power source. If in automatic mode, verify that the temperature sensors are properly placed and reading temperatures. Try switching to manual mode to test fan control. - Alarm Sounds Frequently:
Solution: Check the set alarm temperature. It might be set too low for your system's normal operating conditions. Verify that all temperature sensors are correctly installed and not dislodged. Ensure your computer's cooling system (case fans, CPU cooler) is adequate and clean. - Inaccurate Temperature Readings:
Solution: Ensure the temperature sensor probes are making good contact with the components they are monitoring. Avoid placing sensors near heat sources that do not represent the component's actual temperature.
Specifications
| Feature | Description |
|---|---|
| Brand | ASHATA |
| Model | STW5023 |
| Installation Size | 5.25 Inch Drive Bay |
| Display Type | LCD |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Alarm Temperature Range | 40°C to 90°C |
| Operating Temperature | Up to 40°C (104°F) |
Warranty and Support
This ASHATA STW5023 unit comes with a manufacturer warranty for 90 days from the date of purchase. Please retain your proof of purchase for warranty claims.
For technical support or warranty inquiries, please contact your retailer or the ASHATA customer service department. Refer to the product packaging or the retailer's website for specific contact details.