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 and cooler filters. Clean filthy filters or replace with new ones.

Cooler module isn't cooling properly.

• Check the tube connections between both LCMs and the projector. Make sure the tubes are properly connected.

• Check the air filters on the Laser Cooler Module. Clean or replace them if necessary. See service procedure "Replacement of a Cooling Unit Filter".

• If error persists, replace the diffusor wheel module. 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.