ABB IRC5 Operating Manual page 207

Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The cooling fans may be faulty or the air flow may be obstructed.
The ambient temperature may be too high or the system may
be running with a too high load for extended periods.
Recommended actions
Check that the fans are running and that the air flow is not
obstructed. Check that the ambient temperature does not
exceed the cabinet rating. If the system contains additional
axes then check that motors are not too large for the drive units.
If possible, rewrite the user program to reduce the amount of
hard acceleration.
39477, Rectifier Temperature Error
Description
The temperature in the rectifier unit connected to drive
communication link arg in drive module arg has reached a too
high a level.
Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The cooling fans may be faulty or the air flow may be obstructed.
The ambient temperature may be too high or the system may
be running with a too high load for extended periods.
Recommended actions
Check that the fans are running and that the air flow is not
obstructed. Check that the ambient temperature does not
exceed the cabinet rating. If the system contains additional
axes then check that motors are not too large for the drive units.
If possible, rewrite the user program to reduce the amount of
hard acceleration.
39478, Internal Motor PTC Temperature Error
Description
The temperature in one or more robot motors connected to
drive module arg is has reached a too high a level.
Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
Probable causes
The motor may have stalled (possibly due to a collision), the
motor may be overloaded or the ambient temperature may be
higher than the rated level for the robot.
Recommended actions
Check that the robot has not collided. Check that the ambient
temperature does not exceed the robot rating. Allow the robot
to cool down, and then run the system again. Replace any
motors damaged by the excessive heat. If possible, rewrite the
user program to reduce the amount of hard acceleration.
39479, External Motor PTC Temperature Error
Description
One or more additional axis motors connected to drive module
arg is has reached a too high a level.
Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The motor may have stalled (possibly due to a collision), the
motor may be overloaded or the ambient temperature may be
higher than the rated level for the robot.
Recommended actions
Check that the additional axis has not collided. Check that the
ambient temperature does not exceed the rating. Allow the
motor to cool down, and then run the system again. Replace
any motors damaged by the excessive heat. If possible, rewrite
the user program to reduce the amount of hard acceleration.
39482, Mains Voltage Too High
Description
The mains voltage detected in drive module arg is too high.
Consequences
The robot cannot be operated.
Probable causes
The mains transformer may be incorrectly wired or the external
supply voltage may be too high.
Recommended actions
Measure the incoming mains voltage at the main contactor in
the drive module. Make sure it is within the range specified for
this module. Check the wiring of the mains transformer as
detailed in the robot Product Manual.
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