Error Message Levels; Fault Handling - ABB ACS5000 User Manual

ABB
10.3.2

Error message levels

Alarm
Fault
Alarm / fault messages
10.3.3

Fault handling

5k A UM
Two error message levels are used in the drive:
An alarm does not shut down the drive. If the condition causing the alarm
is not corrected, a persisting alarm can often lead to a fault. An alarm
cannot be reset manually. The alarm message is deleted from the display
as soon as the alarm condition has been corrected.
A fault shuts down the drive. The type of shutdown depends on the origin
of the fault.
Depending on the type of fault, the main circuit breaker (MCB) is opened
by the drive or stays closed:
■ Class 1 faults (FC 1) open the MCB
■ Class 2 faults (FC 2) do not open the MCB
Since the MCB is controlled and monitored entirely by the drive, no
external opening command must be given to the MCB when a fault
condition occurs.
A fault condition must be corrected and the fault be manually reset before
the drive can be started again.
If an alarm or a fault occurs, a specific message is saved in the fault buffer
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 has number 1.
■ The first fault entered has the highest number.
Information on the fault classification (eg, 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
2. +Fault PPCS Communication
3. +Fault AMC: Fault Class 1
4. +Fault DC Undervoltage
In the above example:
■ 4. +Fault DC Undervoltage is the reason for the failure of the drive,
as it occurred first.
■ 3. +Fault AMC: Fault Class 1 classifies the fault.
3BHS221906 ZAB E01 Rev. D
Chapter 10 - Preventive and corrective maintenance
2008-01-08 16:58:24.3770
2008-01-08 16:58:24.3760
2008-01-08 16:56:02.1170
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