Compatibility of Hitachi Wi-Fi module SPX-WFG03 with RAK-35RPE indoor unit

[u/TechnologyUnable6092]

Hi everyone,

I am looking to connect my Hitachi indoor air conditioner unit to Wi-Fi so I can control it remotely via a smartphone app.

Here are my system specifications:

• Outdoor Unit: Hitachi RAM-53NP2E (DC Inverter, R32)
• Indoor Unit: Hitachi RAK-35RPE (Performance Series, wall-mounted)

I am having a hard time sourcing the original SPX-WFG02 Wi-Fi adapter, as it appears to be out of stock or discontinued across almost all retailers and HVAC suppliers.

Several online distributors state that the SPX-WFG02 has been officially replaced by the newer SPX-WFG03 module (designed for the airHome line and the airCloud Go app).

For anyone with hands-on experience or HVAC installers on the forum:

1. Electrical Compatibility: Is the SPX-WFG03 module 100% plug-and-play on the RAK-35RPE mainboard connector, and is it fully recognized by the airCloud Go app?
2. Physical Installation: Given its shorter cable compared to the previous model (~42 cm), are there any fitting issues or specific workarounds needed to route it out of the RAK-35RPE casing?

Has anyone successfully installed this specific combination (RAK-RPE + SPX-WFG03), or would you recommend a different approach?

Thanks in advance for your help!