Measurement circuit temperature

What does A5EA mean?

A problem has been detected with an internal temperature measurement circuit within the drive. The auxiliary code (format XXXY YYZZ) specifies the exact location of the issue: 'Y YY' indicates the BCU control unit channel (000 for a ZCU control unit), and 'ZZ' specifies the location (e.g., 1: U-phase IGBT, 2: V-phase IGBT, 3: W-phase IGBT, 4: Power unit INT board, 5: Brake chopper, 6: Air inlet, 7: Power supply board, 8: du/dt filter, FAh: Air in temp).

• A faulty or disconnected temperature sensor at the specified internal location.
• Internal wiring damage or loose connections within the drive's temperature measurement paths.
• Localized overheating at a particular component or board exceeding its designed temperature limits.
• Malfunction of the internal temperature measurement circuit itself.

Click steps to track your progress.

1. 1

   Identify the exact location of the temperature measurement problem by carefully interpreting the auxiliary code (e.g., 'ZZ' values like 1 for U-phase IGBT, 6 for Air inlet).

2. 2

   Visually inspect the identified area or component within the drive for any signs of overheating, discoloration, or physical damage.

3. 3

   Verify the drive's overall cooling system (main fans, auxiliary fans, heatsinks) is functioning correctly and is free from obstructions.

4. 4

   Allow the drive to cool down completely to ambient temperature, then power cycle and observe if the warning clears.

5. 5

   If the warning persists after cooling and external cooling issues are ruled out, contact ABB support, providing the complete auxiliary code for internal diagnosis.