How to Connect Mitsubishi Electric Air Conditioning to Tuya

This guide helps installers, distributors and system integrators connect a confirmed Mitsubishi Electric indoor unit to Tuya Smart or Smart Life using AcmeLink ME. Choose the ordered configuration first: WiFi setup, Zigbee gateway setup and Modbus integration have different requirements.

Check the Mitsubishi Electric model and CN105 connector

CN105 is the physical connection on a compatible indoor-unit control board. For AcmeLink ME it carries both power and communication, so the module does not need a separate power adapter. CN105 is not a wireless protocol: WiFi, Zigbee and Modbus describe the control configuration you order.

ACMELEC confirms completed compatibility testing for the listed PEFY, PEY and SEZ models across all five ME configurations. Use the manufacturer-tested PEFY, PEY and SEZ model table and the product's illustrated model list to check the full suffix. A matching series name or connector alone does not confirm an unlisted model.

1. Record the complete indoor-unit model from its nameplate, including the suffix.
2. Provide a clear CN105 connector photo and the original controller model. Include any adapter already connected to the indoor unit.
3. State which controls you need to retain and which new commands or status readings the project requires.
4. Confirm the ME configuration and connection arrangement with ACMELEC before ordering the sample.

ME is the Mitsubishi Electric version; AcmeLink DK is the Daikin version. Mitsubishi Heavy Industries requires a separate compatibility check. Keep these brand and interface routes distinct when preparing an equipment schedule.

For the board-photo checklist, see how to check the CN105 connection. Use the English project enquiry checklist to send the complete model, selected configuration and integration requirements together.

Which AcmeLink ME configuration should you choose?

On a small screen, scroll the table horizontally to compare all columns.

WiFi and Zigbee versions use the same indoor-unit wiring but different Tuya modules. Modbus configurations add two RS485 communication wires, A and B. WiFi + Zigbee and the three-protocol combination are not available; a software setting does not turn a WiFi unit into a Zigbee unit.

For Modbus projects, send the host or BMS model and required points, including command and feedback requirements. Request the register addresses, read/write definitions and serial settings for the ordered version before programming. For combined versions, agree how the wireless and wired controls will be used and verify their interaction in the sample installation.

Choosing a Tuya alternative to a Mitsubishi Electric WiFi interface

If you are researching MAC-567IF-E, MAC-587IF-E, MAC-597IF-E or MAC-577IF-E for an existing installation, start with the indoor-unit model and the control platform you want to use. AcmeLink ME offers a Tuya-based route for confirmed compatible units. The original adapter reference helps identify the installation; it does not establish that ME is a direct replacement with identical functions.

1. Identify the existing hardware. Record the full indoor-unit model, original WiFi interface model and any controller that will remain connected. Include photographs of the labels and CN105 connection.
2. Choose the app ecosystem. Specify whether the project needs Tuya Smart / Smart Life or must retain its existing Mitsubishi Electric app. Do not assume ME will sign in to MELCloud or MELCloud Home. For Tuya scenes, list the other devices and the actions you want to automate.
3. Separate required commands from feedback. List power, mode, temperature setpoint, fan speed and the status information needed by the user or host. Verify the required functions on the exact sample installation.
4. Compare the complete project cost. Request a quotation for the selected ME configuration and quantity. Include a Zigbee gateway where required, installation work and any BMS engineering in the comparison.

Review the original WiFi interface references and ME selection checks, then match the indoor unit against the ME tested-model table. Compatibility information for an original Mitsubishi Electric interface does not extend the ME tested list.

WiFi or Zigbee for smart-home projects?

Choose the WiFi version when the installation is designed around the available 2.4 GHz WiFi network and Tuya app control. Choose the separate Zigbee version when the project uses a matched Tuya Zigbee gateway. Confirm supported scenes and device combinations before rollout. These are separate hardware configurations; ordering a WiFi unit does not include a switchable Zigbee mode.

Planning Mitsubishi Electric CN105 control with Modbus and a BMS

For wired integration, request the Modbus, WiFi + Modbus or Zigbee + Modbus version. A WiFi connection by itself is not a Modbus interface. ME Modbus configurations add RS485 A/B wiring; obtain the register map and serial settings for the ordered version before writing the host program.

On a small screen, scroll the table horizontally to read all columns.

This is an integration checklist, not a register specification or a promise that every requested point is supported. For a custom requirement, agree the development scope, sample test and acceptance criteria before a bulk order. Use the ME sample-validation checklist to record the result.

Pair the WiFi version with Tuya Smart or Smart Life

These steps apply to WiFi and WiFi + Modbus. Have qualified HVAC personnel isolate power and connect the confirmed harness according to the supplied manual before app setup.

1. Prepare a 2.4 GHz WiFi network, install Tuya Smart or Smart Life and sign in. Enable phone Bluetooth for assisted discovery.
2. With the correctly installed module powered, press and hold RESET until the green indicator flashes.
3. Open the app and add the discovered device, or use the automatic scan shown in the manual.
4. Select the 2.4 GHz WiFi network and enter its password. Wait for the app to finish adding the device.
5. Check the required power, mode, setpoint, available fan speeds and status feedback on the confirmed indoor unit.

See illustrated WiFi instructions, pages 6–11. Bluetooth assists discovery here; it is not another orderable control version. App wording can vary by version.

Add the Zigbee version through its gateway

These steps apply to Zigbee and Zigbee + Modbus. First set up the appropriate Tuya Zigbee gateway, then add the ME module as a sub-device.

1. Follow the gateway's own instructions to add it to the app. The WiFi-connected gateway illustrated in the ME manual uses a 2.4 GHz WiFi network.
2. Open the online gateway in the app and choose Add subdevice.
3. Press and hold RESET on the installed ME module until its green indicator flashes, then start discovery.
4. Complete addition and check the required controls and status with the confirmed indoor unit.

The ME module communicates with the gateway using Zigbee. Entering WiFi credentials in the illustrated gateway setup does not make the ME Zigbee module a WiFi device. See illustrated Zigbee instructions, pages 12–16.

What should you check if pairing or control fails?

The WiFi module does not appear in the app

Check that you ordered a WiFi version, the green indicator is flashing, phone Bluetooth is enabled for assisted discovery, and the intended network is 2.4 GHz. Check the password and coverage at the installation position.

The Zigbee module cannot be found

Check the gateway model and that it is online. Start Add subdevice from the gateway, then confirm the ME green indicator is flashing. Use the Zigbee instructions rather than direct WiFi pairing.

The device appears online but a command does not work

Record the complete indoor-unit model, ME configuration, command sent and observed response. Send connection photos and the existing-controller details for review. App discovery alone does not verify every control function.

The BMS cannot read or write the required points

Check that the supplied version includes Modbus and that the host configuration matches its documentation. Request review of the A/B wiring, serial settings, register addresses and read/write requirements. Wireless pairing instructions do not supply a Modbus register map.

Use the CN105 installation and control demonstration for an overview of the connection. Use the written instructions above and the revised manual for pairing.

Prepare an international sample or project enquiry

For a distributor or installation project in any market, send the destination country, indoor-unit models and quantities, required ME configuration, app or BMS, original-controller details and required functions. Add sample quantities, rollout timing and branding or documentation needs.

Confirm the sample's required commands, feedback and retained controls before repeating the installation. Applicable product documents are checked against the exact model and destination market. Prices, supply terms and any non-standard requirements are confirmed through B2B quotation.

Request an ME compatibility and configuration review

Manual and product references

• AcmeLink ME specifications and manufacturer-tested model list
• Revised English manual: WiFi and Zigbee setup (16 pages, approximately 20.2 MB) (PDF · 16 pages · 20.2 MB)
• Samples, MOQ and OEM/ODM terms
• Guía de AcmeLink ME para instaladores en España

Common buyer questions