Ambient temperature too high.

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

Insufficient cooling of phosphor wheel motor

• Check the Cooling fluid level. Add in cooling fluid to the light source if the level is too low. See procedure "Liquid cooling circuit".

• Clean the front filter or replace with new one. See "Maintenance procedures".

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

Malfunction temperature sensor.

Replace the LCB. See service procedure "Replacing the Laser Control Board (LCB)".

Malfunction LCB

Replace the LCB. See service procedure "Replacing the Laser Control Board (LCB)".