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).

Blocked filters.

Check the projector filters. Clean filthy filters or replace with new ones.

Cooler module isn't cooling properly.

• Check the cooling liquid reservoir. Fill it up if necessary.

• If error persists, replace the Light Source. See "Laser Phosphor Light Source".

Malfunction anode fan or cathode fan.

Check the speed and voltage of the anode and cathode fan. Replace any malfunctioning fan.