Blocked high density filter at the front side of the projector.

Replace the front high density filter with a new one. See servicemanual chapter Replacement of the dust filter on the front side.

Ambient temperature too high.

Check the ambient temperature at the air inlets of the projector.Make sure that the ambient temperature does not exceed 35°C (95°F).

Malfunction air extraction system.

Check the condition of the air extraction system. The air extractionsystem must be capable of removing minimum 6,65 m³/min or 235CFM per installed DP-2000/DP-1500 digital projector.