Wire unit (reference 2 image) 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 1 image) units between Signal Backplane and temperature sensor in the air outlet channel of the projector.

Check the connection between the wire units. To access this connection you have to remove the inner cover plates of the Light Processor compartment. See "Open the sealed compartment".

Damaged wire unit of the temperature sensor (reference 3 image).

1. Repair the wire unit.

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

Defect temperature sensor (reference 3 image).

Replace the temperature sensor.