1. Introduction
The Cerhot CR-MN2 WiFi Smart Switch is a high-power smart device designed for remote control and energy monitoring of electrical appliances. It supports a maximum load of 30A and operates on AC 90-250V. This smart switch integrates with popular smart home platforms like Tuya App, Smart Life App, Amazon Alexa, and Google Assistant, offering convenient voice control and mobile remote management. Its features include real-time power monitoring, various timing functions, and group control capabilities, making it an ideal solution for optimizing energy usage in various applications.
Figure 1: Cerhot CR-MN2 WiFi Smart Switch overview.
2. Safety Information
- Ensure the power supply is disconnected before installation or maintenance to prevent electric shock.
- Installation should be performed by a qualified electrician or in accordance with local electrical codes.
- Do not exceed the maximum load of 30A. Overloading can cause damage to the device and pose a fire hazard.
- Keep the device away from water and high humidity environments.
- Do not attempt to disassemble or repair the device yourself. Contact qualified personnel for service.
- Ensure proper grounding if required by your electrical system.
3. Specifications
| Feature | Specification |
|---|---|
| Model | CR-MN2 |
| Type | Moulded Case Smart Switch |
| Rated Voltage | AC 90-250V |
| Max Load Current | 30A |
| Wireless Connectivity | WiFi 2.4GHz (IEEE 802.11 b/g/n) |
| Product Dimensions | 88 x 60 x 30 mm (3.46 x 2.36 x 1.18 inches) |
| Smart Device | Yes |
| Certifications | CE, FCC, RoHS, UL, WEEE |
| Origin | Mainland China |
4. Setup and Installation
4.1 Package Contents
- Cerhot CR-MN2 WiFi Smart Switch
- User Manual (this document)
4.2 Wiring Diagram
Follow the wiring diagram carefully. Ensure all connections are secure and correctly aligned with the input and output terminals. Incorrect wiring can damage the device or connected appliances.
Figure 2: Dimensions and Wiring Diagram.
- Disconnect Power: Before starting, turn off the main power supply at the circuit breaker to avoid electric shock.
- Identify Wires: Identify the Live (L) and Neutral (N) wires for both the input power supply and the appliance you wish to control.
- Connect Input: Connect the incoming Live (L) wire to the 'Input L' terminal and the incoming Neutral (N) wire to the 'Input N' terminal on the smart switch.
- Connect Output: Connect the appliance's Live (L) wire to the 'Output L' terminal and the appliance's Neutral (N) wire to the 'Output N' terminal on the smart switch.
- Secure Connections: Ensure all wires are firmly secured in their respective terminals.
- Restore Power: Once all connections are verified, restore power at the circuit breaker. The indicator light on the switch should illuminate.
4.3 App Pairing
- Download App: Download and install the 'Tuya Smart' or 'Smart Life' app from your smartphone's app store.
- Register/Login: Open the app and register for an account or log in if you already have one.
- Add Device: Tap the '+' icon or 'Add Device' in the app.
- Enter Pairing Mode: Press and hold the learning key on the smart switch (refer to Figure 2 for location) until the indicator light starts blinking rapidly.
- Select Device Type: In the app, select the appropriate device category (e.g., 'Electrical' -> 'Switch (Wi-Fi)').
- Connect to Wi-Fi: Confirm the indicator light is blinking rapidly and follow the in-app instructions to connect the switch to your 2.4GHz Wi-Fi network.
- Device Added: Once successfully paired, the device will appear in your app, and the indicator light will stop blinking.
5. Operating Instructions
5.1 Mobile App Control
Once paired, you can control the smart switch from anywhere using the Tuya Smart or Smart Life app. The app allows you to:
- Turn the connected appliance ON/OFF remotely.
- View the real-time status of the switch (ON/OFF).
- Access energy consumption statistics.
- Set schedules and timers.
- Configure relay status after power failure.
Figure 3: Remote control via smartphone app.
5.2 Voice Control
Integrate your smart switch with Amazon Alexa or Google Assistant for hands-free control.
- Link Account: In the Alexa or Google Home app, enable the 'Tuya Smart' or 'Smart Life' skill/service and link your account.
- Discover Devices: Ask Alexa or Google Assistant to discover new devices.
- Voice Commands: Use commands like:
- "Alexa, turn on the [device name]."
- "Hey Google, turn off the [device name]."
Figure 4: Voice control with smart speakers.
5.3 Timing and Scheduling
The app offers flexible timing options to automate your appliances:
- Appointment Timing: Set specific ON/OFF times for individual days or a recurring schedule.
- Cycle Timing: Configure the switch to cycle ON and OFF at regular intervals.
- Countdown: Set a countdown timer for the switch to turn ON or OFF after a specified duration.
Figure 5: Timing/Countdown Function in the app.
5.4 Power Monitoring
The smart switch provides real-time electricity statistics, allowing you to track and optimize power consumption. This feature helps in understanding energy usage patterns and potentially reducing electricity bills.
Figure 6: Electricity statistics display.
5.5 Relay Status Setting
You can configure the switch's state after a power outage. This ensures your appliances behave as desired when power is restored.
- OFF: The switch will remain OFF after power is restored.
- ON: The switch will turn ON after power is restored.
- Remember Last Status: The switch will return to its state prior to the power outage.
Figure 7: Relay status setting options.
5.6 Group Control and Sharing
- Group Control: Combine multiple smart switches into a single group within the app to control them simultaneously with one command. This is useful for controlling multiple lights or appliances in a room or area.
- Device Sharing: Share control of your smart switch with family members or other users through the app, allowing multiple people to manage the connected devices.
Figure 8: Group control function for multiple devices.
Figure 9: Multi-user and multi-device control capabilities.
5.7 Product Demonstration Video
Video 1: A brief demonstration of the Cerhot CR-MN2 WiFi Smart Switch, showcasing its physical appearance and basic functionality.
6. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Firmware Updates: Regularly check the Tuya Smart or Smart Life app for available firmware updates to ensure optimal performance and security.
- Environmental Conditions: Ensure the device is used within its specified operating temperature and humidity ranges.
7. Troubleshooting
- Device not powering on: Check the main power supply and ensure wiring connections are secure.
- Cannot connect to Wi-Fi:
- Ensure your Wi-Fi network is 2.4GHz. The device does not support 5GHz Wi-Fi.
- Verify your Wi-Fi password is correct.
- Move the smart switch closer to your Wi-Fi router.
- Reset the device by holding the learning key until the indicator light blinks rapidly, then try pairing again.
- Voice control not working:
- Ensure your Tuya Smart/Smart Life account is correctly linked to Alexa or Google Assistant.
- Check the device name in the smart home app and use that exact name in your voice commands.
- Verify your smart speaker has an active internet connection.
- Inaccurate power monitoring: Ensure the device is correctly wired and the load does not exceed 30A.
8. User Tips
- For outdoor applications, ensure the smart switch is installed in a waterproof enclosure to protect it from elements.
- Utilize the timing functions for energy-intensive appliances like water heaters or irrigation pumps to run during off-peak hours or for specific durations, saving energy.
- Regularly review the electricity statistics to identify power-hungry devices and adjust usage habits accordingly.
- When setting up voice control, use simple, memorable names for your devices to make commands easier.
9. Warranty and Support
Cerhot products are designed for reliability and performance. For warranty information, please refer to the terms and conditions provided at the time of purchase or contact your retailer. For technical support, troubleshooting assistance, or further inquiries, please contact Cerhot customer service through the official website or your purchase platform.