1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the JFZTPVAK AHC15A/THC15A DIN Rail Digital Programmable Weekly Timer Switch. This device is designed for precise time control of electrical circuits, offering programmable ON/OFF cycles for various applications.
Figure 1: Front view of the AHC15A/THC15A Digital Programmable Weekly Timer Switch. This image displays the compact design suitable for DIN rail mounting, featuring a digital display and control buttons.
2. Safety Information
- Always disconnect power before installation or maintenance to prevent electric shock.
- Installation should be performed by a qualified electrician or competent person.
- Ensure the device is installed in a dry, well-ventilated area, away from direct sunlight, heat sources, and corrosive gases.
- Verify that the supply voltage matches the timer's specifications (12V, 24V, 110V, or 220V AC/DC).
- Do not exceed the maximum load capacity of 16A 250V AC.
3. Key Features
- Digital LCD Display: Clear indication of time and programming status.
- Weekly Programmable: Up to 28 ON/OFF programs per day or week.
- DIN Rail Mounting: Easy installation in standard electrical enclosures.
- Multiple Voltage Options: Available in 12V, 24V, 110V, and 220V AC/DC versions.
- Built-in Battery: Retains programs and time settings for up to 60 days during power outages.
- Manual Override: Allows temporary or permanent manual control.
- High Capacity Relay: 16A 250V AC switching capacity.
4. Technical Specifications
| Parameter | Value |
|---|---|
| Model | AHC15A / THC15A |
| Operating Voltage | 12V, 24V, 110V, 220V AC/DC (model dependent) |
| Switching Capacity | 16A 250V AC |
| Programs | Up to 28 ON/OFF per day or week |
| Timer Range | 1 minute to 168 hours |
| Minimum Interval | 1 minute |
| Power Consumption | 3 VA (MAX) |
| Time Error | Average 1s/24h (at 25°C) |
| Hysteresis | 2 seconds/day (at 25°C) |
| Power Black-out Memory | 60 days |
| Operating Temperature | -20°C to +50°C |
| Switching Contact | 1 changeover switch |
5. Installation and Wiring
5.1 DIN Rail Mounting
The timer switch is designed for standard 35mm DIN rail mounting. Simply clip the device onto the DIN rail in your electrical panel.
Figure 2: Side view of the timer switch, illustrating the integrated DIN rail mounting clip at the bottom. This clip allows for secure and easy installation onto a standard DIN rail.
5.2 Wiring Diagram
Refer to the wiring diagram below for correct electrical connections. Ensure all connections are secure and comply with local electrical codes.
- Terminals 1 (L) and 2 (N): Power supply input for the timer. Connect the live (L) and neutral (N) wires here, matching the timer's voltage rating.
- Terminals 3 (NO), 4 (COM), 5 (NC): Output relay contacts.
- COM (4): Common terminal for the switched load.
- NO (3): Normally Open contact. The circuit is closed when the timer is ON.
- NC (5): Normally Closed contact. The circuit is closed when the timer is OFF.
Figure 3: Detailed wiring diagram located on the side of the timer switch. It clearly labels the power input terminals (L, N) and the relay output terminals (NO, COM, NC) for proper electrical connection.
6. Operating Instructions
Figure 4: Front view of the timer with the protective cover open, revealing the LCD display and control buttons (D+, H+, M+, P, RESET, MANUAL C/R). These buttons are used for setting the time and programming ON/OFF cycles.
6.1 Initial Setup and Reset
- Upon first use or after a prolonged power outage, the display may be blank. Connect the timer to power.
- Press the RESET button using a pointed object (e.g., a pen tip) to clear all previous settings and initialize the timer. The display will show "00:00" and "MO".
6.2 Setting Current Time
- Press and hold the D+ button to set the current day of the week (MO, TU, WE, TH, FR, SA, SU).
- Press and hold the H+ button to set the current hour (00-23).
- Press and hold the M+ button to set the current minute (00-59).
- Release the buttons to save the time. The clock will start running.
6.3 Programming ON/OFF Cycles
The timer supports up to 28 ON/OFF programs. Each program consists of an ON time and an OFF time.
- Press the P button once. The display will show "1 ON" and "00:00". This is the first ON program.
- Press D+ to select the day(s) for this program. Options include individual days, weekdays, weekends, or all days.
- Press H+ to set the hour for the first ON time.
- Press M+ to set the minute for the first ON time.
- Press P again. The display will show "1 OFF" and "00:00". This is the first OFF program.
- Repeat steps 2-4 to set the day(s), hour, and minute for the first OFF time.
- Continue pressing P to cycle through "2 ON", "2 OFF", up to "28 ON", "28 OFF". Set desired programs. If fewer than 28 programs are needed, simply press P until the clock display returns.
- After setting all programs, press the clock button (usually labeled with a clock icon or simply return to the main display by not pressing P for a few seconds) to exit programming mode and return to the current time display.
6.4 Manual Override
The MANUAL C/R button allows you to manually control the output state, overriding the programmed settings.
- Press MANUAL C/R repeatedly to cycle through the following modes:
- ON AUTO: The output is currently ON, and will follow the next programmed OFF event.
- OFF AUTO: The output is currently OFF, and will follow the next programmed ON event.
- ON: The output is permanently ON, ignoring all programs.
- OFF: The output is permanently OFF, ignoring all programs.
- Select "ON AUTO" or "OFF AUTO" to resume automatic operation based on your programs.
7. Maintenance
- Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
- Do not use abrasive cleaners or solvents.
- Regularly check wiring connections for tightness and signs of wear.
- The internal battery is designed for long life and typically does not require replacement. If the display frequently goes blank during power outages, the battery may be weakening.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank. | No power supply; internal battery depleted. | Check power connections. If power is present, press the RESET button. The internal battery recharges when power is supplied. |
| Timer does not switch ON/OFF as programmed. | Incorrect programming; manual override active; incorrect current time. | Verify program settings. Check if the manual override is set to "ON" or "OFF" (not "ON AUTO" or "OFF AUTO"). Ensure the current time is set correctly. |
| Output is always ON or always OFF. | Manual override set to permanent ON/OFF. | Press the MANUAL C/R button until "ON AUTO" or "OFF AUTO" is displayed. |
| Time is inaccurate. | Normal drift (minor); significant error indicates a fault. | The timer has an average error of 1s/24h. If error is significant, reset the device and re-set the time. If problem persists, contact support. |
9. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation provided at the time of purchase or contact your retailer.
For technical support or inquiries, please contact the manufacturer or your authorized dealer. When contacting support, please have your product model (AHC15A/THC15A) and purchase information available.
