Connector of the temperature sensor is disconnected

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

Disconnected wiring 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 wiring of the temperature sensor.

1. Repair the wiring.

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

Defect temperature sensor.

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