Code 5284: “ambient- temperature sensor open” (Error)

Situation

Solution

Wire unit of the temperature sensor disconnected from the powerbackplane. To access the power backplane you have to remove the Input& Communication unit.

Check the connection (reference B ).

Damaged wire unit of the ambient temperature sensor (referenceA ) causing an open circuit.The ambient temperature sensor is located in the air channel behindthe compartment of the Input & Communication unit.

  1. Repair the wire unit.

  2. If not repairable, replace the hole wire unit and temperaturesensor.

Defect temperature sensor (reference A ).

Replace the temperature sensor.

Malfunction Fan & Motor Control board.

Replace the Fan & Motor Control board.

Malfunction Power Backplane.

Replace the Power Backplane.

A

Ambienttemperature sensor.

B

Ambienttemperature sensor connection with the power backplane.