ABB ACSM1 - Page 319

Fault tracing
319
0026 AUTOPHASING
(0x3187)
Autophasing routine failed
because the estimated angle of
the rotor differs too much from
the measured angle of the rotor.
All other reasons for the
autophasing fault are explained
in section Autophasing on page
42.
Try other autophasing modes (see parameter
11.07 AUTOPHASING MODE) if possible.
In addition, repeat autophasing multiple times
and check the value in parameter 97.20 POS
OFFSET USER between separate runs (see
section Autophasing). The value should not
change between consecutive autophasing
runs.
Check that there is no slip in the encoder
connection to the motor axle. Because of the
slip the estimated and measured drive speed
may differ during fast accelerations/
decelerations.
0027 PU LOST
(0x5400)
Connection between the JCU
Control Unit and the power unit
of the drive is lost.
Check the connections between the JCU
Control Unit and the power unit.
If the JCU is powered from an external
supply, ensure that parameter 95.01 CTRL
UNIT SUPPLY is set to (1) External 24V.
0028 PS COMM
(0x5480)
Communication errors detected
between the JCU Control Unit
and the power unit of the drive.
Check the connections between the JCU
Control Unit and the power unit.
If the JCU is powered from an external
supply, ensure that parameter 95.01 CTRL
UNIT SUPPLY is set to (1) External 24V.
0029 IN CHOKE TEMP
(0xFF81)
Temperature of internal AC
choke excessive.
Check cooling fan.
0030 EXTERNAL
(0x9000)
Fault in external device. (This
information is configured
through one of programmable
digital inputs.)
Check external devices for faults.
Check setting of parameter 46.01 EXTERNAL
FAULT.
0031 SAFE TORQUE OFF
(0xFF7A)
Programmable fault: 46.07
STO DIAGNOSTIC
Safe Torque Off function is
active, i.e. safety circuit
signal(s) connected to
connector X6 is lost
- during drive start or drive run
or
- while drive is stopped and
parameter 46.07 STO
DIAGNOSTIC setting is (1)
Fault.
Check safety circuit connections. For more
information, see the appropriate drive
hardware manual and Application guide -
Safe torque off function for ACSM1, ACS850
and ACQ810 drives (3AFE68929814
[English]).
0032 OVERSPEED
(0x7310)
Motor is turning faster than
highest allowed speed due to
incorrectly set minimum/
maximum speed, insufficient
braking torque or changes in
load when using torque
reference.
Check minimum/maximum speed settings,
parameters 20.01 MAXIMUM SPEED and
20.02 MINIMUM SPEED.
Check adequacy of motor braking torque.
Check applicability of torque control.
Check need for braking chopper and
resistor(s).
Code Fault
(fieldbus code)
Cause What to do