1. Product Overview
This manual provides essential information for the installation, operation, and maintenance of the Daikin DRCH-R5 EC11073 monitoring circuit board for air conditioners. This component is designed to integrate with compatible Daikin air conditioning systems to provide monitoring functionalities.

Figure 1: Daikin DRCH-R5 EC11073 Monitoring Circuit Board
2. Safety Information
Always observe the following safety precautions to prevent personal injury and damage to the product or air conditioning system:
- Installation and servicing should only be performed by qualified and authorized personnel.
- Ensure the main power supply to the air conditioning unit is disconnected before attempting any installation, maintenance, or inspection.
- Wear appropriate personal protective equipment (PPE) such as safety glasses and gloves.
- Do not touch live electrical components.
- Verify all connections are secure and correct before restoring power.
- This board is an electronic component; handle with care to avoid electrostatic discharge (ESD) damage.
3. Installation
The DRCH-R5 EC11073 is an internal component of a Daikin air conditioning system. Specific installation steps will vary depending on the exact model of the air conditioner. Refer to the service manual of your specific Daikin air conditioning unit for detailed installation instructions.
General Guidelines:
- Power Disconnection: Ensure the main power supply to the air conditioner is completely shut off and locked out.
- Access: Carefully open the air conditioner's control panel or housing to access the existing monitoring board or designated installation slot.
- Removal (if replacing): If replacing an existing board, carefully disconnect all wiring harnesses and mounting screws. Note the orientation and connection points for each wire.
- Installation: Align the new DRCH-R5 EC11073 board with the mounting points and secure it with appropriate fasteners.
- Wiring: Connect all wiring harnesses to their corresponding ports on the new board. Ensure all connections are firm and correctly seated. Refer to the wiring diagram provided in your air conditioner's service manual.
- Inspection: Double-check all connections and ensure no loose wires or foreign objects are present.
- Closure: Close the air conditioner's control panel or housing.
- Power Restoration: Restore power to the air conditioning unit.

Figure 2: Detailed view of the circuit board connections
4. Operation
The Daikin DRCH-R5 EC11073 monitoring board functions as an integral part of your Daikin air conditioning system. Its operation is typically seamless and managed by the main air conditioner's control system. There are no direct user controls on the board itself.
Monitoring data and status indicators, if available, will be displayed through the air conditioner's primary user interface or diagnostic tools. Consult your air conditioner's user manual for information on accessing monitoring data or diagnostic codes.
5. Maintenance
The DRCH-R5 EC11073 monitoring board is designed for long-term reliability and generally requires minimal maintenance. However, periodic checks as part of overall air conditioner maintenance are recommended.
- Visual Inspection: During routine air conditioner servicing, visually inspect the board for any signs of damage, corrosion, or loose connections.
- Cleaning: If dust accumulation is observed, gently clean the board using a soft brush or compressed air. Do not use liquids or abrasive cleaners.
- Environmental Conditions: Ensure the air conditioner's internal environment remains within specified operating conditions (temperature, humidity) to prevent damage to electronic components.
6. Troubleshooting
If your air conditioning system experiences issues that you suspect are related to the monitoring board, consider the following general troubleshooting steps. Always consult a qualified technician for complex diagnostics and repairs.
- No Power/Functionality:
- Check if the main power supply to the AC unit is on.
- Verify all wiring connections to the board are secure.
- Inspect the board for any visible signs of damage (e.g., burnt components, swollen capacitors).
- Error Codes:
- If the air conditioner displays an error code, refer to your air conditioner's service manual for the meaning of the code and recommended actions.
- Some error codes may directly indicate a fault with the monitoring or control board.
- Intermittent Operation:
- Check for loose connections or intermittent power supply.
- Ensure the board is securely mounted and not subject to excessive vibration.
If troubleshooting steps do not resolve the issue, contact a certified Daikin service technician.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | EC11073 (DRCH-R5) |
| Type | Air Conditioning Fitting / Air Conditioner Parts |
| Application | Home Air Conditioning Systems |
| Electric | No |
| High-concerned chemical | None |
| Certification | CE |
| Origin | Mainland China |
| Package Dimensions (Approx.) | Length: 25 cm, Width: 18 cm, Height: 5 cm |
| Package Weight (Approx.) | 1.1 kg |
8. User Tips
- Always ensure compatibility with your specific Daikin air conditioner model before installation.
- When handling the circuit board, avoid touching the electronic components directly. Hold it by the edges to prevent damage from static electricity or oils from your skin.
- Keep the area around the air conditioner's control board clean and free from dust to ensure optimal performance and longevity.
9. Warranty and Support
This product is typically covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or contact the seller directly.
Support Information:
- Customer Help: Assistance is available for product inquiries.
- Return Service: Information regarding returns for any quality problems.
For technical support or service inquiries, please contact your authorized Daikin service provider or the seller, "Shop1100008016 Store".





