P.O.S.C. failed

I have used V6II few times successfully with my Fuji XT-20 and Cactus RF60X flash until today V6II started to show P.O.S.C. failed Err:0x09D561 message when I power on the system. LED is blinking green/orange/red. Battery reset does not help. What should I do?


  • Hi @Harri, that message means there's a problem with the circuit board / internal wiring. Please return the unit to the dealer you purchased with for service.

    Thank you.
    Antonio Lao
    Brand Manager

    To help us better help you, always state the exact firmware version installed on your Cactus device(s), such as: "1.1.013", "NIK.A.001", "v.103", or "A06".

    TTL or HSS not working on Cactus V6 II and V6 IIs? Be sure to check hot shoe connectivity by doing the <CAMERA INFO> check.

    Feel free to suggest an improvement or share product ideas. Contact us directly at info@cactus-image.com.  At Cactus, we listen. 
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