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ACS550-02/U2 User’s Manual
Diagnostics
• digital input
• serial communication.
When the fault has been corrected, the motor can be started.
History
For reference, the last three fault codes are stored into parameters 0401, 0412,
0413. For the most recent fault (identified by parameter 0401), the drive stores
additional data (in parameters 0402…0411) to aid in troubleshooting a problem. For
example, parameter 0404 stores the motor speed at the time of the fault.
The Assistant Control Panel provides additional information about the fault history.
See section
Fault Logger mode
on page
85
for more information.
To clear the fault history (all of the
Group 04: FAULT HISTORY
parameters):
1. Using the control panel in the Parameters mode, select parameter 0401.
2. Press EDIT (or ENTER on the Basic Control Panel).
3. Press UP and DOWN at the same time.
4. Press SAVE.
Correcting alarms
The recommended corrective action for alarms is:
• Determine if the alarm requires any corrective action (action is not always
required).
• Use the table in section
Alarm listing
below to find and address the root cause of
the problem.
Alarm listing
The following table lists the alarms by code number and describes each.
Alarm
code
Display
Description
2001
OVERCURRENT
Current limiting controller is active. Check for and correct:
• Excessive motor load.
• Insufficient acceleration time (parameters 2202
ACCELER
TIME
1 and
2205
ACCELER
TIME
2).
• Faulty motor, motor cables or connections.
2002
OVERVOLTAGE
Overvoltage controller is active. Check for and correct:
• Static or transient overvoltages in the input power supply.
• Insufficient deceleration time (parameters 2203
DECELER
TIME
1 and
2206
DECELER
TIME
2).
2003
UNDERVOLTAGE
Undervoltage controller is active. Check for and correct:
• Undervoltage on mains.
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