ABB ACS880 Firmware Manual page 659

Code Event name /
(hex) Aux. code
4993 Safe motor
temperature 3
5080 Fan
5081 Auxiliary fan
not running
5090 STO hardware
failure
5091 Safe torque
off
5092 PU logic error
5093 Rating ID
mismatch
Cause
The thermistor protection module
installed in slot 3 indicates
overtemperature.
Cooling fan feedback missing.
An auxiliary cooling fan (connected to
the fan connectors on the control unit)
is stuck or disconnected.
Safe torque off hardware failure.
Safe torque off function is active, i.e.
safety circuit signal(s) connected to
connector XSTO is broken during start
or run.
Power unit memory has cleared.
The hardware of the drive does not
match the information stored in the
memory unit. This may occur eg. after
a firmware update or memory unit
replacement.
Fault tracing 659
What to do
Check the cooling of the motor.
Check the motor load and drive
ratings.
Check the wiring of the temperature
sensor. Repair wiring if faulty.
Measure the resistance of the sensor.
Replace sensor if faulty.
See A581 Fan.
See A582 Auxiliary fan not
Contact your local ABB representative,
quoting the auxiliary code. The code
contains location information,
especially with parallel-connected
inverter modules.
When converted into a 32-bit binary
number, the bits of the code indicate
the following:
31...28: Number of faulty inverter
module (0...11 decimal). 1111: STO_ACT
states of control unit and inverter
modules in conflict
27: STO_ACT state of inverter modules
26: STO_ACT state of control unit
25: STO1 of control unit
24: STO2 of control unit
23...12: STO1 of inverter modules 12...1
(Bits of non-existing modules set to
1)
11...0: STO2 of inverter modules 12...1
(Bits of non-existing modules set to
1)
Check safe torque off circuit
connections.
For more information, see appropriate
drive hardware manual and
description of parameter
indication run/stop (page
Cycle the power to the drive. If the
control unit is externally powered, also
reboot the control unit (using
parameter 96.8 Control board
or by cycling its power. If the problem
persists, contact your local ABB
representative.
Cycle the power to the drive.
Check the auxiliary code (format
0X0Y).
"X" indicates the first faulty PU
channel in hexadecimal (1...C) (With a
ZCU control unit, "X" can be 1 or 2 but
this is irrelevant to the fault).
running.
31.22 STO
370).
boot)