ABB ACS850 - Page 302

302 Fault tracing
0021 STO1 LOST
(0x8182)
Safe torque off function is
active, i.e. safety circuit signal
1 connected between XSTO:1
and XSTO:3 is lost.
Check safety circuit connections. For
more information, see the appropriate
drive Hardware Manual, description of
parameter 30.07 (page 193), and
Application guide - Safe torque off
function for ACSM1, ACS850 and
ACQ810 drives (3AFE68929814
[English]).
0022 STO2 LOST
(0x8183)
Safe torque off function is
active, i.e. safety circuit signal
2 connected between XSTO:2
and XSTO:4 is lost.
0023 STO MODE CHANGE
(0xFF7A)
Error in changing Safe torque
off supervision, i.e. parameter
30.07 Sto diagnostic setting
could not be changed to value
Fault.
Contact your local ABB representative.
0024 INTBOARD
OVERTEMP
(0x7182)
Interface board (between
power unit and control unit)
temperature has exceeded
internal fault limit.
Let 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
(0x7183)
Input bridge or brake chopper
temperature has exceeded
internal fault limit.
Let 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
(0x3187)
Autophasing routine (see
section Autophasing on page
67) failed.
Try other autophasing modes (see
parameter 11.07 Autophasing mode) if
possible.
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.
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.
0030 EXTERNAL
(0x9000)
Fault in external device. (This
information is configured
through one of programmable
digital inputs.)
Check external devices for faults.
Check parameter 30.01 External fault
setting.
0031 SAFE TORQUE OFF
(0xFF7A)
Programmable fault:
30.07 Sto diagnostic
Safe torque off function is
active, i.e. safety circuit
signal(s) connected to
connector XSTO is lost during
start or run, or while drive is
stopped and parameter 30.07
Sto diagnostic
is set to 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]).
Code Fault
(fieldbus code)
Cause What to do