1. Product Overview
The Walfront TB-388 is a heavy-duty 24-hour mechanical timer switch designed for controlling electrical loads such as lamps, lighting systems, and other home appliances. It features a robust mechanical design, a 24-hour time range, and a minimum setting unit of 15 minutes, allowing for precise scheduling of up to 96 ON/OFF cycles per day. This timer is equipped with a removable battery to maintain timekeeping during power outages.
Key Features:
- 24-hour mechanical timing with power failure backup.
- Minimum setting unit: 15 minutes.
- Up to 96 ON/OFF settings per day.
- Removable battery for time retention.
- Suitable for AC220V, 10A applications.
Figure 1: Front view of the Walfront TB-388 Mechanical Timer Switch, showing the 24-hour dial, control pins, and the included backup battery.
2. Specifications
| Parameter | Value |
|---|---|
| Model | TB-388 |
| Electric Shock Capacity | AC220V 10A |
| Time Range | 24 hours |
| Minimum Setting Unit | 15 minutes |
| Maximum Setting Times | 96 times / 15 minutes |
| Battery Type | 100mAh battery (removable) |
| Power Consumption | 5W |
| Item Weight | 9.2 ounces |
3. Installation and Setup
3.1 Safety Precautions
- Ensure power is disconnected at the main circuit breaker before any installation or wiring.
- Installation should be performed by a qualified electrician if you are unfamiliar with electrical wiring.
- Verify the voltage and current ratings of your load do not exceed the timer's specifications (AC220V 10A).
3.2 Battery Installation
The timer includes a removable 100mAh battery to maintain timekeeping during power interruptions. Install this battery before initial use.
- Locate the battery compartment or connection point, typically on the side or back of the timer.
- Connect the provided battery to the designated connector. Ensure correct polarity.
Figure 2: The removable 100mAh battery for the Walfront TB-388 timer, used for power backup.
Figure 3: Detail of the battery connection port on the Walfront TB-388 timer, located near the dial.
3.3 Wiring Instructions
The timer is designed for fixed installation. Refer to the wiring diagram on the unit or consult a qualified electrician for proper connection.
- Identify the input terminals (L1, N) and output terminals (S1, S2, or Load). For a simple load, L1 is typically Live In, N is Neutral In, and the output would be Switched Live and Neutral to the load.
- Connect the main power supply (AC220V) to the designated input terminals.
- Connect your appliance or lighting system to the output terminals.
- Ensure all connections are secure and insulated.
Figure 4: The wiring terminals (S1, S2, L1) at the bottom of the Walfront TB-388 timer for electrical connections.
4. Operating Instructions
4.1 Setting the Current Time
- Rotate the 24-hour dial clockwise until the "PRESENT TIME" arrow points to the current time. The dial is marked from 1 to 24 hours.
- Ensure the time is set accurately for proper scheduling.
Figure 5: The main dial of the Walfront TB-388 timer, indicating the "PRESENT TIME" arrow and the 24-hour markings.
4.2 Programming ON/OFF Times
The timer uses small pins around the dial to set ON and OFF periods. Each pin represents a 15-minute interval.
- To set an ON period, push the corresponding pins OUTWARD (away from the center of the dial).
- To set an OFF period, leave the corresponding pins INWARD (towards the center of the dial).
- You can set up to 96 ON/OFF cycles within a 24-hour period.
Figure 6: The time-set pins on the Walfront TB-388 timer. Pins pushed outward correspond to ON times, while inward pins correspond to OFF times.
4.3 Operating Mode Switch
The timer features a three-position switch for selecting the operating mode:
- OFF: The connected appliance will remain off, overriding any programmed settings.
- AUTO: The timer will operate according to the programmed ON/OFF settings.
- ON: The connected appliance will remain on, overriding any programmed settings.
5. Maintenance
5.1 Cleaning
- Disconnect power before cleaning.
- Wipe the exterior of the timer with a soft, dry cloth.
- Do not use liquid cleaners or abrasive materials.
5.2 Battery Replacement
The internal 100mAh battery provides backup power for timekeeping. If the timer loses time during power outages, the battery may need replacement.
- Disconnect the main power supply to the timer.
- Carefully access the battery compartment or connection point.
- Disconnect the old battery and replace it with a new 100mAh battery of the same type.
- Ensure correct polarity when connecting the new battery.
- Secure the battery compartment.
6. Troubleshooting
- Timer not turning ON/OFF at programmed times:
- Check if the "PRESENT TIME" is set correctly.
- Ensure the ON/OFF pins are pushed in/out correctly for the desired schedule.
- Verify the operating mode switch is set to "AUTO".
- Confirm the timer is receiving power.
- Appliance not receiving power:
- Check the main power supply to the timer.
- Ensure the wiring connections are secure.
- Test the appliance by plugging it directly into a working outlet.
- Verify the timer's operating mode switch is not set to "OFF".
- Timer loses time during power outages:
- The internal backup battery may be depleted or faulty. Refer to Section 5.2 for battery replacement.
- Ensure the battery is correctly installed.
7. Support
For further assistance or technical support, please contact Walfront customer service. Refer to the product packaging or the Walfront official website for contact information.
You can also visit the Walfront Store on Amazon for more product information.
