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Connect a shielded, 2 core, twisted pair control cable from the C225 / C325F2 to the 2 & 3 terminals in the Fujitsu FCU
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1️⃣ iZone C225 module: Ensure the correct C325 module is connected for the AC unit make it is controlling
2️⃣ 2 / 3: Connect the 2 /3 cable from the Fujitsu FCU to here. Polarity is critical
3️⃣ Shielded cable: Shielded, 2 core, twisted pair cable must be used and is not supplied by iZone