1. Introduction
Thank you for purchasing the Solight DT03 Digital Timer. This device is designed to automatically control the power supply to electrical appliances, helping you save energy and manage your home or office environment more efficiently. Please read this manual carefully before use to ensure proper operation and to maximize the timer's functionality.
2. Important Safety Instructions
- For indoor use only. Do not expose to rain or moisture.
- Ensure the timer is securely plugged into a grounded outlet.
- Do not exceed the maximum load rating of 230V / 16A. Overloading can cause damage to the timer and connected appliances, and may pose a fire hazard.
- Do not disassemble or attempt to repair the timer. Refer all servicing to qualified personnel.
- Keep out of reach of children. This device includes an integrated child safety feature.
- Unplug the timer from the wall outlet before cleaning. Clean only with a dry cloth.
3. Product Features
- Large LCD display for clear readability.
- Daily and weekly programming capabilities.
- Up to 8 ON/OFF switching cycles per day.
- 9 different repeat modes for flexible scheduling.
- Random circuit function for enhanced security.
- Integrated child safety mechanism.
- Minimum switching time of 1 minute.
- Manual override function (ON/AUTO/OFF).
4. Product Overview
Familiarize yourself with the components of your Solight DT03 Digital Timer:

Figure 1: Solight DT03 Digital Timer Front View
This image displays the white Solight DT03 Digital Timer. At the top, an LCD screen shows the time "10:38" and "TH" for Thursday, along with "AUTO" mode. Below the screen, a "MASTER CLEAR" button is visible. Further down, there are six control buttons arranged in two rows: "WEEK", "HOUR", "MINUTE", "RST/RCL" in the top row, and "CLOCK", "TIMER", "ON/AUTO/OFF", "RANDOM" in the bottom row. The lower half of the device features a European-style power socket with a central grounding pin and two power holes, labeled "16 250~".
4.1. Display and Buttons
- LCD Display: Shows current time, day, operating mode (AUTO, ON, OFF), and program settings.
- MASTER CLEAR: Resets all settings to factory defaults. Use a pointed object (e.g., pen tip) to press.
- WEEK: Sets the day of the week.
- HOUR: Sets the hour.
- MINUTE: Sets the minute.
- RST/RCL: Resets or recalls program settings.
- CLOCK: Enters or exits clock setting mode.
- TIMER: Enters or exits program setting mode.
- ON/AUTO/OFF: Selects operating mode (Always ON, Automatic, Always OFF).
- RANDOM: Activates or deactivates the random function.
5. Setup
5.1. Initial Power-Up and Reset
- Plug the timer into a standard wall outlet.
- The LCD display will light up. If the display is blank or shows garbled characters, press the MASTER CLEAR button using a pointed object to reset the unit. This will clear all memory and restore default settings.
- Allow the timer to charge for approximately 5-10 minutes before programming, as it contains a built-in rechargeable battery for memory backup.
5.2. Setting the Current Time
- Press and hold the CLOCK button.
- While holding CLOCK, press the WEEK button repeatedly until the correct day of the week is displayed.
- While holding CLOCK, press the HOUR button repeatedly until the correct hour is displayed.
- While holding CLOCK, press the MINUTE button repeatedly until the correct minute is displayed.
- Release the CLOCK button. The current time is now set.
6. Operating Instructions
6.1. Programming ON/OFF Times (8 Cycles)
The timer allows you to set up to 8 ON/OFF programs. Each program consists of an ON time and an OFF time.
- Press the TIMER button once. The display will show "1 ON".
- Press WEEK to select the desired day(s) for this program. You can choose a single day, a block of days (e.g., Mon-Fri), or all days. There are 9 repeat modes available.
- Press HOUR to set the desired ON hour.
- Press MINUTE to set the desired ON minute.
- Press the TIMER button again. The display will show "1 OFF".
- Repeat steps 2-4 to set the desired OFF day(s), hour, and minute for the first program. Note: The OFF day(s) will typically match the ON day(s) unless you want the program to span across midnight or specific days.
- Press the TIMER button to cycle through the remaining programs (2 ON, 2 OFF, ..., 8 ON, 8 OFF) and set them as needed. If you do not need all 8 programs, simply press CLOCK to exit programming mode.
- To exit programming mode at any time, press the CLOCK button.
6.2. Selecting Repeat Modes
When setting the program (step 6.1.2), pressing the WEEK button repeatedly will cycle through 9 different repeat modes:
- MO, TU, WE, TH, FR, SA, SU (Individual days)
- MO TU WE TH FR SA SU (All 7 days)
- MO TU WE TH FR (Weekdays)
- SA SU (Weekend)
- MO TU WE TH FR SA
- MO WE FR
- TU TH SA
- MO TU WE
- TH FR SA
6.3. Manual Override (ON/AUTO/OFF)
Press the ON/AUTO/OFF button to cycle through the operating modes:
- ON: The timer output is continuously ON, ignoring all programmed settings.
- AUTO: The timer operates according to the programmed ON/OFF settings. This is the standard operating mode.
- OFF: The timer output is continuously OFF, ignoring all programmed settings.
6.4. Random Function
The random function is designed to make your home appear occupied when you are away, by turning connected lights or appliances ON and OFF at irregular intervals.
- Press the RANDOM button to activate the random function. "RANDOM" will appear on the display.
- When activated, the timer will turn ON and OFF randomly within a specific time window (e.g., 6 PM to 6 AM, or based on your programmed times with added randomness). Refer to the display for specific indications.
- Press the RANDOM button again to deactivate the function.
7. Maintenance
- Cleaning: Unplug the timer from the wall outlet before cleaning. Use a soft, dry cloth to wipe the surface. Do not use liquid cleaners or abrasive materials.
- Storage: Store the timer in a cool, dry place when not in use.
- Battery: The internal rechargeable battery maintains settings during power outages. If the timer is unplugged for an extended period, it may require recharging and resetting the time.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank or garbled. | Low internal battery or system error. | Press the MASTER CLEAR button. Plug the timer into an outlet for 5-10 minutes to charge the internal battery. |
| Timer does not turn ON/OFF at programmed times. |
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| Connected appliance does not turn ON. |
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9. Specifications
| Model: | DT03 |
| Voltage: | 230V AC, 50Hz |
| Max Load: | 16A / 3680W |
| Minimum Setting Time: | 1 minute |
| Programs: | 8 ON/OFF programs |
| Repeat Modes: | 9 modes (daily, weekly, weekdays, weekend, etc.) |
| Dimensions (L x W x H): | 9 x 9.6 x 21.7 cm (approximate) |
| Weight: | 50 g (approximate) |
| Child Safety: | Integrated |
10. Warranty and Support
Solight products are manufactured to high-quality standards. For information regarding warranty terms, technical support, or service, please refer to the warranty card included with your purchase or contact your local Solight distributor or retailer. Keep your purchase receipt as proof of purchase.







