274 ACS550-02/U2 User’s Manual
Diagnostics
The message reappears after a few seconds if the control panel is not touched and
the fault is still active.
Flashing green – Alarms
For less severe errors, called alarms, the diagnostic display is advisory. For these
situations, the drive is simply reporting that it had detected something “unusual.” In
these situations, the drive:
• flashes the green LED on the drive (does not apply to alarms that arise from
control panel operation errors)
• flashes the green LED on the control panel (if attached to the drive)
• sets an appropriate bit in an Alarm Word parameter (0308 or 0309). See Group
03: FB ACTUAL SIGNALS on page 134 for the bit definitions
• overrides the control panel display with the display
of an alarm code and/or name in the Fault mode
(figures on the right).
Alarm messages disappear from the control panel
display after a few seconds. The message returns
periodically as long as the alarm condition exists.
Correcting faults
The recommended corrective action for faults is:
• Use the table in section Fault listing below to find and address the root cause of
the problem.
• Reset the drive. See section Fault resetting on page 279.
Fault listing
The following table lists the faults by code number and describes each. The fault
name is the long form shown in the Fault mode of the Assistant Control Panel when
the fault occurs. The fault names shown (for Assistant Control Panel only) in the
Fault Logger mode (see page 85) and the fault names for parameter 0401 LAST
FAULT may be shorter.
Fault
code
Fault name in
panel
Description and recommended corrective action
1
OVERCURRENT Output current is excessive. 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.
00:00
PANEL LOSS
ALARM
LOC
ALARM 2008
LOC
FWD
A2008
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