ABB ACQ80, Firmware Manual

Page: 323 / 390

Fault tracing 323
2310 Overcurrent Output current has
exceeded internal fault
limit.
In addition to an actual
overcurrent situation,
this fault may also be
caused by an earth fault
or supply phase loss.
Check motor load.
Check acceleration times in
parameter group
23 Speed
reference ramp
(speed control) or
28 Frequency reference chain
(frequency control). Also check
parameter
46.03 Torque scaling
.
Check motor and motor cable
(including phasing and delta/star
connection).
Check there are no contactors
opening and closing in motor
cable.
Check that the startup data in
parameter group 99 corresponds
to the motor rating plate.
Check that there are no power
factor correction capacitors or
surge absorbers in motor cable.
Check for an earth fault in motor
or motor cables by measuring the
insulation resistances of motor
and motor cable. See chapter
Electrical installation
, section
Checking the insulation of the
assembly
in the
Hardware manual
of the drive.
2330 Earth leakage
Programmable fault:
31.20 Earth fault
Drive has detected load
unbalance typically due
to earth fault in motor or
motor cable.
Check there are no power factor
correction capacitors or surge
absorbers in motor cable.
Check for an earth fault in motor
or motor cables by measuring the
insulation resistances of motor
and motor cable.
Try running the motor in scalar
control mode if allowed. (See
parameter
99.04 Motor control
mode
.)
If no earth fault can be detected,
contact your local ABB
representative.
Code
(hex)
Fault / Aux. code
(
aux code visible only on
assistant control panel
and drive composer)
Cause What to do