Fault tracing 303
0022
STO2 LOST Safe torque off function is
active, ie, safety circuit
signal 2 connected
between X6:2 and X6:4 is
lost while the drive is at
stopped state and
parameter 46.05 STO
DIAGNOSTIC setting is
Alarm or No.
Check safety circuit connections.
For more information, see the
appropriate drive Hardware
manual.
0023
STO MODE
CHANGE
Error in changing the Safe
torque off supervision, ie,
parameter 46.05 STO
DIAGNOSTIC setting
could not be changed to
value Fault.
Contact your local ABB
representative.
0024
INTBOARD
OVERTEMP
Interface board (between
power unit and control unit)
temperature has exceeded
the internal fault limit.
Let the drive cool down.
Check for excessive ambient
temperature.
Check for cooling fan failure.
Check for obstructions in the air
flow.
Check the dimensioning and
cooling of the cabinet.
0025
BC MOD
OVERTEMP
Input bridge or brake
chopper temperature has
exceeded the internal fault
limit.
Let the drive cool down.
Check for excessive ambient
temperature.
Check for cooling fan failure.
Check for obstructions in the air
flow.
Check the dimensioning and
cooling of the cabinet.
0026
AUTOPHASING Autophasing routine (see
section Autophasing for
permanent magnet
synchronous motors on
page 167) failed.
Try other autophasing modes (see
parameter 99.10 IDRUN MODE), if
possible.
0028
PS COMM 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.
0029
IN CHOKE TEMP Temperature of internal AC
choke excessive.
Check the cooling fan.
Code Fault Cause What to do
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