1. Product Overview
The Midea KJRH-120H/BMK-E wired controller is designed for seamless integration with Midea Central Air Conditioning systems, providing intuitive control over your indoor climate. This manual provides essential information for the proper installation, operation, and maintenance of your controller.
Figure 1: Front view of the Midea wired controller, displaying the LCD screen and control buttons.
2. Safety Information
- Always disconnect power to the air conditioning unit before installation or maintenance.
- Installation should be performed by a qualified technician in accordance with local electrical codes.
- Do not expose the controller to water or excessive humidity.
- Do not attempt to open or repair the controller yourself. Refer to qualified service personnel.
3. Installation and Setup
3.1 Mounting the Controller
- Choose a suitable location on an interior wall, away from direct sunlight, heat sources, or drafts, and at an average height (e.g., 1.5 meters from the floor).
- Carefully detach the back plate from the controller unit.
- Use the back plate as a template to mark the drilling points on the wall.
- Drill holes and insert wall anchors if necessary.
- Secure the back plate to the wall using appropriate screws.
Figure 2: Back plate of the controller, indicating mounting screw locations.
3.2 Wiring Connections
Ensure power to the central air conditioning unit is OFF before proceeding with wiring.
- Connect the communication wires from your Midea central air conditioning unit to the corresponding terminals on the controller's PCB. The terminals are typically labeled E, Y, X, B, R, G. Refer to your specific Midea AC unit's wiring diagram for exact connections.
- Ensure all connections are secure and properly insulated.
Figure 3: Internal view of the controller showing the PCB and wiring terminals (E, Y, X, B, R, G).
- Once wiring is complete, carefully attach the controller unit to the mounted back plate.
- Restore power to the central air conditioning unit.
4. Operating Instructions
The controller features an intuitive interface with an LCD display and several buttons for easy operation.
4.1 Button Functions
- Power Button: (Located on the top right of the control panel, typically marked with a circle and vertical line icon) Turns the air conditioning unit ON or OFF.
- Menu Button: (Located on the top left of the control panel, typically marked with three horizontal lines icon) Accesses the main menu for advanced settings and modes.
- Up/Down Arrows: (Up arrow above 'OK', Down arrow below 'OK') Adjusts temperature, navigates menu options, or changes settings.
- OK Button: (Central button) Confirms selections or enters sub-menus.
- Back/Return Button: (Located on the bottom left, typically marked with a curved arrow icon) Returns to the previous screen or cancels an action.
- Lock Button: (Located on the bottom right, typically marked with a padlock icon) Locks or unlocks the controller to prevent unauthorized changes.
4.2 Basic Operation
- Power On/Off: Press the Power button to turn the unit on or off.
- Adjusting Temperature: Use the Up and Down arrow buttons to set your desired temperature.
- Selecting Operating Mode: Press the Menu button, navigate to "Mode" using the arrow buttons, press OK, then select your desired mode (e.g., Cool, Heat, Fan, Auto) and confirm with OK.
- Adjusting Fan Speed: From the Menu, navigate to "Fan Speed", press OK, select your preferred speed (e.g., Low, Medium, High, Auto), and confirm with OK.
- Locking the Controller: Press the Lock button to prevent accidental changes. Press it again to unlock.
5. Maintenance
Regular maintenance ensures optimal performance and longevity of your wired controller.
- Cleaning: Gently wipe the controller's surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or excessive moisture, as these can damage the display or internal components.
- Inspection: Periodically check the wiring connections for any signs of wear or looseness. Ensure the controller is securely mounted to the wall.
6. Troubleshooting
If you encounter issues with your controller, try the following basic troubleshooting steps:
- No Display/No Power:
- Check if the central air conditioning unit has power.
- Ensure all wiring connections to the controller are secure.
- Verify the circuit breaker for the AC unit has not tripped.
- Controller Not Responding:
- Check if the controller is in "Lock" mode. Press the Lock button to unlock it.
- Try turning the AC unit off and then back on from its main power source.
- Incorrect Temperature Readings:
- Ensure the controller is not exposed to direct sunlight or other heat/cold sources that could affect its internal temperature sensor.
If problems persist after attempting these steps, contact a qualified service technician or Midea customer support.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | KJRH-120H/BMK-E 17317100005575 |
| Brand | Midea |
| Use | Air Conditioner |
| Wireless Communication | Wire Control |
| Frequency | 433 MHz (Internal component) |
| Channel | 1 |
| Support APP | No |
| High-concerned chemical | None |
| Certification | None |
| Dimensions (L x W x H) | Approx. 20 cm x 20 cm x 2 cm |
| Weight | Approx. 0.2 kg |
| Origin | Mainland China |
Figure 4: Side view with product label, showing model and serial information.
8. User Tips
- Compatibility Check: Before purchasing or installing, always verify that this controller model (KJRH-120H/BMK-E) is compatible with your specific Midea central air conditioning unit or heat pump model. Compatibility issues can arise even within the same brand group.
- Wiring Diagrams: Always consult the wiring diagram provided with your specific Midea AC unit for precise terminal connections, as these can vary.
9. Warranty and Support
For warranty information, please refer to the terms and conditions provided at the time of purchase or contact your seller directly. For technical support or service inquiries, please reach out to Midea customer service or your authorized Midea service provider.
