1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Hilitand XH-3002 Electronic Temperature Controller. This device is designed for precise temperature regulation in various applications such as aquariums, incubation systems, home brewing, and more. Please read this manual thoroughly before use to ensure proper function and safety.

Image 1.1: Overview of the Hilitand XH-3002 Electronic Temperature Controller highlighting its LED display, accurate measurement, auto temperature regulation, and high-quality material.
2. Safety Information
- Ensure the power supply matches the controller's specifications (110-220V for this model).
- Do not expose the device to water or excessive humidity.
- Disconnect power before making any wiring connections or performing maintenance.
- Keep out of reach of children.
- If the device appears damaged, do not use it.
3. Product Features
- Wide Range of Use: Suitable for automatic irrigation, aquariums, fish tanks, home, and industrial applications.
- Accurate Temperature Control: Control range of -50℃ to 110℃ with 0.1℃ precision.
- Auto Start/Stop Function: Automatically regulates heating or cooling based on set temperatures.
- Easy Installation: Compact design (60x45x31mm) with M4 mounting holes.
- Durable Construction: Solid ABS shell, LED display, and 10K temperature probe.
4. Package Contents
The package includes:
- 1 x Hilitand XH-3002 Electronic Temperature Controller
- 1 x Temperature Probe (integrated)
Note: Other accessories shown in product images are not included unless specified.
5. Specifications
| Parameter | Value |
|---|---|
| Model | XH-3002 |
| Input Voltage | 110-220V |
| Power Output | 1500W |
| Measuring Range | -50℃ to 110℃ |
| Control Precision | 0.1℃ |
| Temperature Sensor | 10K NTC Probe |
| Output Type | 10A Relay |
| Mounting Hole | M4 (4mm) |
| Dimensions | 60mm x 45mm x 31mm |
| Material | ABS + Electronic Components |

Image 5.1: Physical dimensions of the XH-3002 controller, showing measurements of 60mm, 45mm, and 73mm (including mounting tabs), with M4 bore diameter mounting holes.
6. Setup and Wiring
Before connecting, ensure the power source is disconnected. The controller has three sets of wires: Input, Output, and Probe.
- Power Input: Connect the two red/black wires labeled 'INPUT' to your 110-220V AC power supply.
- Load Output: Connect the two yellow/black wires labeled 'OUTPUT' to the device you wish to control (e.g., heater, cooler). Ensure the load's power consumption does not exceed 1500W.
- Temperature Probe: The black wire labeled 'PROBE' is the temperature sensor. Place the metal tip of the probe in the environment where temperature needs to be measured.

Image 6.1: Wiring connections for the XH-3002 controller, showing input power, output load, and temperature probe connections.
7. Operating Instructions
The controller features an LED display and three buttons: SET, Up (▲), and Down (▼).

Image 7.1: Front panel of the XH-3002 controller, indicating the display, output indicator light, SET button, Up button (short press to display 'start temp'), and Down button (short press to display 'stop temp').
7.1. Viewing Current Temperature Settings
- Short press the ▲ (Up) button to display the starting temperature (P0).
- Short press the ▼ (Down) button to display the stopping temperature (P1).
7.2. Setting Temperature Parameters (P-Codes)
To enter the parameter setting mode, press and hold the SET button for approximately 3 seconds. The display will show 'P0'. Use the ▲ and ▼ buttons to navigate through the P-codes (P0-P3). Press SET again to select a P-code and adjust its value using ▲ and ▼. Press SET again to confirm the setting and exit, or wait a few seconds for it to auto-save and exit.
- P0: Starting Temperature
- Range: -50℃ to 110℃
- Factory Setting: 25℃
- This is the temperature at which the controller will activate the output (e.g., turn on a heater or turn off a cooler).
- P1: Stopping Temperature
- Range: -50℃ to 110℃
- Factory Setting: 40℃
- This is the temperature at which the controller will deactivate the output (e.g., turn off a heater or turn on a cooler).
- P2: Temperature Calibration
- Range: -10℃ to 10℃
- Factory Setting: 0℃
- Use this to fine-tune the temperature reading if there is a known offset with a reference thermometer.
- P3: Delay Start
- Range: 0 to 10 minutes
- Factory Setting: 0 minutes
- This sets a delay before the output activates after the temperature condition is met. Useful for protecting compressors in cooling systems.
7.3. Heating and Cooling Modes
- Heating Mode: Set P0 (Start Temp) < P1 (Stop Temp). The output will activate when the temperature drops below P0 and deactivate when it reaches P1.
- Cooling Mode: Set P0 (Start Temp) > P1 (Stop Temp). The output will activate when the temperature rises above P0 and deactivate when it reaches P1.
8. Maintenance
- Cleaning: Wipe the controller's surface with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Probe Care: Ensure the temperature probe is clean and free from debris for accurate readings. Avoid bending or damaging the probe cable.
- Inspection: Periodically check all wiring connections to ensure they are secure.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is off | No power supply or incorrect wiring. | Check power connections and ensure correct voltage. |
| Temperature reading is inaccurate | Damaged probe or incorrect calibration (P2). | Check probe for damage. Adjust P2 setting if necessary. |
| Output not activating/deactivating | Incorrect P0/P1 settings, P3 delay, or faulty wiring. | Verify P0 and P1 settings for heating/cooling mode. Check P3 delay. Inspect output wiring. |
| "LLL" or "HHH" displayed | Probe error (open circuit or short circuit) or temperature out of range. | Check probe connection. Replace probe if damaged. Ensure temperature is within -50℃ to 110℃. |
10. Warranty and Support
For warranty information and technical support, please refer to the product's purchase documentation or contact the seller directly. Hilitand is committed to providing quality products and customer satisfaction.