ABB ACS2000 User Manual page 98

98 A C S 2 0 0 0 , 4 K V U S E R M A N U A L
The display message can be saved and viewed in
the fault log of the drive when a PC with the
DriveWindow, DriveDebug or DriveMonitorTM tool
is connected to the drive. The fault log can also be
called up on the CDP control panel.
Error message levels
Two error message levels are used in the drive:
Alarm/warning
An alarm does not shut down the drive. However, a
persisting alarm condition can often lead to a fault
if the condition causing the alarm is not corrected.
An alarm cannot be reset manually. The alarm
message will be deleted from the display as soon
as the alarm condition has been corrected.
Fault
A fault always shuts down the drive. The type of
shutdown depends on the origin of the fault.
Depending on the type of fault, the MV switchgear
is opened by the drive or stays closed:
• Class 1 faults (FC 1) open the MV switchgear
• Class 2 faults (FC 2) do not open the MV
switchgear
Since the MV switchgear is controlled and
monitored entirely by the drive, no external
opening command must be given to the MV
switchgear when a fault condition occurs.
In general, a fault condition must be corrected and
the fault be manually reset before the drive can be
started again.
Alarm/fault handling
In the event of an alarm or a fault, a specific
message is saved in the fault log of the drive.
Information on the 64 most recent fault
and alarm events are saved.
The faults are entered into the fault buffer as they
occur and are numbered; the last fault entered
always has number 1 assigned to it and the first
fault always has the highest number in the fault
buffer.
Information of the fault classification (e.g. FC 1 or
FC 2) is also saved when the first fault of the fault
class is active. Date and time stamps facilitate fault
tracing, especially when a fault leads to several
subsequent faults.
Example:
1. +Fault AMC: Fault Class 2
2011-01-08 16:58:24.3770
2. +Fault PPCS Communication
2011-01-08 16:58:24.3760
3. +Fault AMC: Fault Class 1
2011-01-08 16:56:02.1170
4. +Fault DC Undervoltage
2011-01-08 16:56:02.1170
In the above example:
• 4. +Fault DC Undervoltage is the reason for the
failure of the drive, as it occurred first
• The message 3. +Fault AMC: Fault Class 1
classifies the fault
• The message 2. +Fault PPCS Communication
occurred 2 min 22 seconds later than the first
fault due to another fault in the drive
• The message 1. +Fault AMC: Fault Class 2 informs
about the pending fault class
For further information on alarms and
faults, see:
• Appendix M - Signal and parameter table,
located on the CD
• Appendix N - Troubleshooting guide,
located on the CD
Standard troubleshooting procedure
Recommended procedure if a malfunction shuts
down the drive:
1. Do not switch off the auxiliary voltage or try to
reset a fault message before all essential
information at the time of the occurrence of the
fault condition has been saved.
2. Call up the Fault History Display on the CDP
control panel.
See Chapter CDP control panel if further
information is required.
Do not clear the fault buffer of the drive now!
3. Identify the fault and make a log book entry.
Note the fault message displayed on the
CDP control panel and look up the fault
message in Appendix N - Troubleshooting
guide, located on the CD, for further
information.
4. Save the content of the data log when a PC is
available that has the DriveWindow tool installed.
The data log provides useful information (e.g.
waveforms of voltage, current, torque, etc.) for
efficient troubleshooting.