Wire unit (reference 1image "Anode fan connections") of the Anode Fan is disconnected.

Remove the left side cover of the projector and check the connection of the Anode Fan.

Wire unit (reference 3 image "Anode fan connections") of the fan units is disconnected from the Signal Backplane.

Remove the front cover and front dust filter from the projector and check if the wire unit (reference 53 image "Anode fan connections") is inserted in the Signal Backplane.

Blocked Anode Fan (reference 2 image "Anode fan connections").

Check if the Anode Fan is not blocked. Ensure that the Anode Fan can turn freely.

Damaged wire unit.

Check if the wire unit of the Anode Fan is not damaged. Repair if possible, otherwise replace with new one.

Malfunction Fan Control board.

Replace the Fan Control board. See "Removing a board in the card cage".

Anode fan (reference 2 image "Anode fan connections") end of life.

Replace the Anode Fan.