The Lamp Power Supply was triggered to switch off the lamp due to an error.

Check the projector log files for other listed errors and solve these errors first. See "Log files".

Malfunction Lamp Power Supply (LPS).

Replace the Lamp Power Supply unit. See service manual chapter "Lamp Power Supply (LPS)".

Lamp House not correctly installed.

Check if the Lamp House is properly installed. Make sure that both fixation screws at the base of the Lamp House are fastened. See service manual chapter "Installation of the Lamp House".

Fan problems.

Check for Fan errors/warnings (Cold Mirror Fan, Lamp Anode Fan, Lamp Cathode Fan, ...) in the projector log files and try to solve them.