3BHS842007 E01 REV C
ACS6080
USER MANUAL
189/238
09 PREVENTIVE AND CORRECTIVE MAINTENANCE
9.3.2.3
Standard troubleshooting procedure
If a fault shuts down the drive, proceed as follows:
9.3.3
LEDs and switches on PCBs and I/O modules
This section provides an overview of the meaning of LEDs and switches of
the main circuit boards and I/O modules.
The LEDs can be checked easily while the auxiliary voltage is switched on
without having to remove covers first. The LEDs provide information on
the status of the devices and can be used for diagnostic purposes.
9.3.3.1
BCU-55 control unit
The BCU-55 is the control unit is connected to the assistant control panel
via fiber optic links.
Each control panel is connected to a separate BCU-55. A BCU-55 contains
integrated branching unit functionality for collecting and storing real-
time data from the converter modules to help fault tracing and analysis.
The data is stored in a secure data card.
Note:
For more information, see the "BCU-55 PP C932 A: Technical
Description" (3BHS813816 E01).
1) DO NOT switch off the auxiliary supply voltage or try to reset a
fault message before all information at the time of the
occurrence of the fault condition has been saved.
2) Select the fault history display on the control panel, but do not
clear the buffer now!
See “8 Operation” on page 163.
3) Identify the fault and make a logbook entry.
4) Save the content of the data logger when a PC is available
which has the Drive Composer/Startup tool installed.
The data logger provides information (eg, waveforms of
voltage, current, torque) for efficient troubleshooting.
5) Contact ABB service if a fault cannot be rectified.
When calling ABB service, it is recommended to have the
following data available at the time when the fault occurred:
• Operating, ambient and load conditions
• Unusual events
6) After the fault has been rectified, start the drive as described
