Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your RISWEKFW MT15V Digital Programmable Weekly Timer Relay. This device is designed to control electrical circuits based on a programmable weekly schedule, offering precise timing for various applications. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Safety Information
Warning: Electrical installation should only be performed by qualified personnel. Incorrect wiring can lead to electric shock, fire, or damage to the device and connected equipment.
- Always disconnect power before installing or servicing the timer relay.
- Ensure the voltage and current ratings of the timer match your application requirements.
- Do not expose the device to moisture or extreme temperatures.
- Ensure all connections are secure and properly insulated.
Product Overview
The RISWEKFW MT15V is a compact digital timer relay designed for DIN rail mounting. It features an LCD display for time and program settings, along with several buttons for configuration. An indicator light shows the operational status.

Figure 1: Front view of the RISWEKFW MT15V Digital Programmable Weekly Timer Relay.

Figure 2: Detailed view of the control panel with labeled buttons and LCD screen.
Components:
- LCD Screen: Displays current time, day, and programming status.
- Working Indicator: LED light indicating operational status.
- Clock Button: Used to set the current time and day.
- Timer Button: Used to enter and exit program setting mode.
- D+ (Day+): Adjusts the day of the week.
- H+ (Hour+): Adjusts the hour.
- M+ (Minute+): Adjusts the minute.
- Manual Button: Toggles between ON, AUTO, and OFF modes.
- Reset Button: Resets all settings to factory defaults.
- Terminals (1, 2, 3, 4, 5): For power input and load connection.
Specifications
| Feature | Specification |
|---|---|
| Brand | RISWEKFW |
| Model Number | MT15V |
| Operating Voltage | AC 220V-240V |
| Rated Current | 16A |
| Mounting Type | DIN Rail |
| Product Dimensions (L x W x H) | 3 x 2 x 1 cm |
| Item Weight | 91 grams |
| Programmable Cycles | Weekly, Multiple ON/OFF programs |

Figure 3: Physical dimensions of the MT15V timer relay.
Setup
1. Mounting
The MT15V timer relay is designed for standard 35mm DIN rail mounting. To mount, align the clips on the back of the device with the DIN rail and press firmly until it clicks into place. Ensure it is securely fastened.

Figure 4: The MT15V timer relay shown mounted on a DIN rail.
2. Wiring
Refer to the wiring diagram below for correct connections. Ensure all power is disconnected before wiring. The terminals are typically labeled as follows:
- Terminals 1 & 2: Power input (AC 220V-240V).
- Terminals 3, 4, 5: Output contacts for controlling the load. Terminal 4 is typically the common (COM), Terminal 3 is normally closed (NC), and Terminal 5 is normally open (NO). Connect your load to Terminal 4 (COM) and Terminal 5 (NO) for standard operation.

Figure 5: Example wiring diagram for connecting the timer relay to a load.

Figure 6: Close-up view of the input and output terminals.
Operating Instructions
1. Initial Power-up and Reset
- After connecting power, the LCD screen should illuminate.
- Press the Reset button (usually a small recessed button) with a pointed object (e.g., a pen tip) to clear all previous settings and ensure a fresh start. The display will show 00:00.
2. Setting Current Time and Day
- Press and hold the Clock button.
- While holding Clock, press D+ to set the current day of the week (e.g., Mo, Tu, We, Th, Fr, Sa, Su).
- While holding Clock, press H+ to set the current hour (24-hour format).
- While holding Clock, press M+ to set the current minute.
- Release the Clock button to save the settings.
3. Programming ON/OFF Cycles
The timer allows for multiple ON/OFF programs. Follow these steps to set a program:
- Press the Timer button once. The display will show "1 ON". This is for the first ON time.
- Press D+ to select the day(s) for this program. You can choose individual days, weekdays, weekends, or all days.
- Press H+ to set the desired ON hour.
- Press M+ to set the desired ON minute.
- Press the Timer button again. The display will show "1 OFF". This is for the first OFF time.
- Repeat steps 2-4 to set the OFF day(s), hour, and minute.
- Continue pressing the Timer button to cycle through subsequent ON/OFF programs (e.g., "2 ON", "2 OFF", etc.) and set them as needed.
- Once all programs are set, press the Clock button to exit programming mode and return to the current time display.
4. Manual Override (ON/AUTO/OFF)
Press the Manual button to cycle through the operating modes:
- ON: The output is continuously ON, overriding all programs.
- OFF: The output is continuously OFF, overriding all programs.
- AUTO: The timer operates according to the programmed ON/OFF cycles. Ensure the timer is in AUTO mode for scheduled operation.
Maintenance
The RISWEKFW MT15V timer relay requires minimal maintenance.
- Periodically check all wiring connections to ensure they are secure.
- Keep the device clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Do not use abrasive cleaners or solvents.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display is blank | No power supply or incorrect wiring. | Check power connections to terminals 1 and 2. Ensure power is ON. |
| Load does not turn ON/OFF as programmed | Timer is not in AUTO mode. Incorrect program settings. Incorrect load wiring. | Press Manual button until "AUTO" is displayed. Review and correct program settings. Verify load wiring to terminals 4 and 5. |
| Time is incorrect | Time not set or power interruption. | Reset and set the current time and day as per instructions. |
| Buttons are unresponsive | Device malfunction. | Try pressing the Reset button. If the issue persists, contact support. |
Warranty and Support
Specific warranty information is not available in this document. Please refer to your purchase documentation or contact the retailer for details regarding warranty coverage.
For technical support or further assistance, please contact RISWEKFW customer service through the vendor's contact information provided at the point of purchase.