(129) Down Lamp Power(Exhaust, xx.x, xx.x) and (17x) Errors

The above referenced error code occurs when the projection lamp is overheating in the projector.  It usually indicates that the external exhaust fan is off, blocked or non-functional.  This error will cause the projector to self protect and shut down.

From NEC service documents:

This error is often accompanied by:

(172) OverTemp.Exhaust(75.0)

​

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