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Electronic Theatre Controls Inc

Fan Fail Error on a Unison Smartlink DRd

Symptoms

The processor at the bottom of my Unison DRd says "Fan Fail." What does that mean?

Description/Explanation of Issue

The fan on your dimming engine is powered by 24VDC from the dimming engine. The dimming engine has a current sensing circuit built into it. If the fan is damaged and unable to run, that circuit can't sense the current—resulting in the Fan Fail error.