Wire unit (reference 3 image "Lamp temperature sensor connection") of the temperature sensor is disconnected from the Signal Backplane.

Plug the wire unit of the temperature sensor into its socket on the Signal Backplane.

Disconnected wire (reference 2image "Lamp temperature sensor connection") units between Signal Backplane and temperature sensor in the air outlet channel of the projector.

Check the connection between the wire units. The connection is made behind the back cover.

Damaged wire unit of the temperature sensor (reference 1 image "Lamp temperature sensor connection").

1. Repair the wire unit.

2. If not repairable, replace the whole wire unit and temperature sensor.

Defect temperature sensor (reference 1 image "Lamp temperature sensor connection").

Replace the temperature sensor. Temperature sensor is visible through the air outlet on top of the projector.