ABB ACQ80 Firmware Manual page 323

Fault / Aux. code
Code
( aux code visible only on
(hex)
assistant control panel
and drive composer
2310 Overcurrent
2330 Earth leakage
Programmable fault:
31.20 Earth fault
Cause
)
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.
Drive has detected load
unbalance typically due
to earth fault in motor or
motor cable.
Fault tracing 323
What to do
Check motor load.
Check acceleration times in
parameter group
23 Speed
(speed control) or
reference ramp
28 Frequency reference chain
(frequency control). Also check
parameter
46.03 Torque
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
Checking the insulation of the
Hardware manual
assembly in the
of the drive.
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.
scaling.
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