ABB IRC5 Operating Manual page 167

Probable causes
Communication problem between drive units and the axis
computer.
Recommended actions
Check that all cables are properly connected. Check that the
drive units have logic power. Check/replace Ethernet cables.
Check for other hardware event log messages. Check the event
log for power supply unit error messages. Check the cabling
between the power supply unit and the drive unit. Check the
24V output from the power supply unit.
34202, Lost communication with drive unit
Description
In drive module arg, the axis computer has lost communication
with the drive unit at unit position arg.
Consequences
No operation will be possible until the fault is corrected. The
system goes to Motors Off state with zero torque.
Probable causes
Communication problem between the drive unit and the axis
computer.
Recommended actions
Check that all cables are properly connected. Check that the
drive unit has logic power. Check/replace Ethernet cables.
Check for other hardware event log messages. Check the event
log for power supply unit error messages. Check the cabling
between the power supply unit and the drive unit. Check the
24V output from the power supply unit.
34203, Motor current too high
Description
The motor current is too high for joint arg, connected to drive
module arg with the drive unit at unit position arg and node arg.
Consequences
No operation will be possible until the fault is corrected. The
system goes to Motors Off state.
Probable causes
The motor configuration is incorrect. The axis load may be too
high or the motor may have stalled (maybe due to a collision).
The motor is too small for the drive unit. Short circuit between
motor phases or ground.
Recommended actions
Check that the motor configuration is correct. Check that the
robot has not collided. If possible, reduce the speed of the user
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
program. Check that the axis load is not too high for the motor.
Verify that the maximum motor current is not too small
compared to the maximum current of the drive unit. Check the
motor cable and motor by measuring their resistance
respectively. Disconnect before measuring.
34251, Incoming mains phase missing
Description
In drive module arg, the rectifier unit at drive unit position arg
has detected a power loss in one phase.
Consequences
The system may stop with DC link too low voltage.
Probable causes
Incoming mains voltage loss of one phase. Some malfunction
in cabling or internal 3-phase components. The rectifier unit is
faulty.
Recommended actions
Check all incoming mains phases to the cabinet. Check all
internal 3-phase components (main switch, mains filter, fuse,
contactors) and cabling in the drive module.
34252, Incoming mains missing
Description
In drive module arg, the rectifier unit at drive unit position arg
has detected a mains voltage loss.
Consequences
No operation will be possible until the fault is corrected. The
system goes to Motors Off state.
Probable causes
Incoming mains voltage loss. Some malfunction in the cabling
or in internal 3-phase components. The rectifier unit is faulty.
Recommended actions
Check the incoming mains voltage. Check all the internal
3-phase components (main switch, mains filter, fuse, contactors)
and cabling in the drive module.
34255, Rectifier temperature error
Description
In drive module arg, the rectifier unit at drive unit position arg
has reached a too high temperature level.
Consequences
No operation will be possible until the rectifier has cooled down.
The system goes to Motors Off state.
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5 Troubleshooting by event log
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