Ambient temperature too high.

Ensure that the ambient temperature of the projector is within spec.

Insufficient cooling of phosphor wheel motor

• 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 phosphor wheel module. See "Laser Phosphor Light Source".

Malfunction temperature sensor.

Replace the LCB. See service procedure "Replacement of the Laser Control Board".

Malfunction LCB

Replace the LCB. See service procedure "Replacement of the Laser Control Board".