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.