ACS550 User’s Manual 247
Diagnostics
24 OVERSPEED Motor speed is greater than 120% of the larger (in magnitude) of 2001
MINIMUM SPEED or 2002 MAXIMUM SPEED. Check for and correct:
• Parameter settings for 2001 and 2002.
• Adequacy of motor braking torque.
• Applicability of torque control.
• Brake chopper and resistor.
25
RESERVED Not used.
26
DRIVE ID Internal fault. Configuration Block Drive ID is not valid. Contact your local
ABB representative.
27
CONFIG FILE Internal configuration file has an error. Contact your local ABB
representative.
28
SERIAL 1 ERR Fieldbus communication has timed out. Check for and correct:
• Fault setup (3018
COMM FAULT FUNC and 3019 COMM FAULT TIME).
• Communication settings (Group 51: EXT COMM MODULE or Group 53:
EFB PROTOCOL as appropriate).
• Poor connections and/or noise on line.
29
EFB CON FILE Error in reading the configuration file for the embedded fieldbus.
30
FORCE TRIP Fault trip forced by the fieldbus. See the fieldbus User’s Manual.
31
EFB 1 Fault code reserved for the embedded fieldbus (EFB) protocol application.
The meaning is protocol dependent.
32
EFB 2
33
EFB 3
34
MOTOR PHASE Fault in the motor circuit. One of the motor phases is lost. Check for and
correct:
• Motor fault.
• Motor cable fault.
• Thermal relay fault (if used).
• Internal fault.
35
OUTP WIRING Possible power wiring error detected. When the drive is not running it
monitors for an improper connection between the drive input power and the
drive output. Check for and correct:
• Proper input wiring – line voltage is NOT connected to drive output.
• The fault can be erroneously declared if the input power is a delta
grounded system and motor cable capacitance is large. This fault can be
disabled using parameter 3023
WIRING FAULT.
36
INCOMPATIBLE
SW
The drive cannot use the software.
• Internal fault.
• The loaded software is not compatible with the drive.
• Call support representative.
37
CB OVERTEMP Drive control board is overheated. The fault trip limit is 88 °C. Check for and
correct:
• Excessive ambient temperature.
• Fan failure.
• Obstructions in the air flow.
Not for drives with an OMIO control board.
38
USER LOAD
CURVE
Condition defined by parameter 3701 USER LOAD C MODE has been valid
longer than the time defined by 3703
USER LOAD C TIME.
Fault
code
Fault name in
panel
Description and recommended corrective action
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