ABB ACS880 Firmware Manual page 517

Code
Fault
(hex)
4991 Safe motor
temperature 1
(Editable message text)
4992 Safe motor
temperature 2
(Editable message text)
4993 Safe motor
temperature 3
(Editable message text)
5080 Fan
Programmable fault:
Main fan fault function
5081 Auxiliary fan not
running
Programmable fault:
Aux fan fault function
5090 STO hardware failure
5091 Safe torque off
Programmable fault:
STO indication run/stop
5092 PU logic error
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Cause
The thermistor protection
module installed in slot 1
indicates overtemperature.
The thermistor protection
module installed in slot 2
indicates overtemperature.
The thermistor protection
module installed in slot 3
indicates overtemperature.
Cooling fan feedback missing.
31.35
An auxiliary cooling fan
(connected to the fan
connectors on the control unit)
31.36
is stuck or disconnected.
Safe torque off hardware
failure.
Safe torque off function is
active, i.e. safety circuit
31.22
signal(s) connected to
connector XSTO is broken
during start or run.
Power unit memory has
cleared.
Fault tracing 517
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 (page 498).
See A582 Auxiliary fan not running
498).
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 31.22 STO indication run/stop
(page 272).
Cycle the power to the drive. If the
control unit is externally powered, also
reboot the control unit (using parameter
96.08 Control board boot) or by cycling
its power. If the problem persists, contact
your local ABB representative.
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