Diagnostics and maintenance
371
ACH550-01 User's Manual
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 status 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
for bit
definitions.
•
overrides the control panel display with the display of an
alarm code and/or name.
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:
1.
Use the
Fault listing
table on page
371
to find and address
the root cause of the problem.
2.
Reset the drive. See section
Fault resetting
on page
380
.
Fault listing
The following table lists the faults by code number and
describes each. The fault name is the long form shown on
the control panel display when the fault occurs. The fault
names shown in the Fault logger mode (see page
92
) and
the fault names for parameter 0401
LAST
FAULT
may be
shorter.
Fault
code
Fault name in
the 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.
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