ABB IRC5 Operating Manual page 203

Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The user program may contain too much hard braking or too
high a payload of the manipulators. This is more likely if the
system contains additional axes.
Recommended actions
Rewrite the user program to reduce the amount of hard braking.
39450, Faulty Fan Unit Power Supply
Description
The power supply for the fan unit in drive module arg is not
within its allowed voltage limits.
Consequences
Probable causes
The main fan power supply unit may be faulty or the supply to
this power supply unit may not be within its allowed voltage
limits.
Recommended actions
Check the fan cable is correctly inserted. Check that all fans
are working. Check the input voltage to the main fan power
supply unit. Replace any faulty unit.
39451, Fan Unit Malfunction
Description
The fan unit in drive module arg has malfunctioned.
Consequences
Probable causes
The fan unit may be faulty, a loss of power supply or the fan
power cable may not be connected correctly.
Recommended actions
Make sure the fan cable is correctly connected. Make sure all
fans are working and that air flow is not obstructed. Measure
the output voltage from the drive unit supplying the fan. Replace
any faulty unit.
39452, Axis Computer Cooling Fan Malfunction
Description
The cooling fan for the axis computer in drive module arg has
malfunctioned.
Operating manual - Troubleshooting IRC5
3HAC020738-001 Revision: AA
Recommended actions
Check that the fan cable is correctly inserted. Replace the faulty
fan unit.
39453, Transformer Cooling Fan Malfunction
Description
The cooling fan for the transformer supplying drive module arg
has malfunctioned.
Recommended actions
Check if fan cable is correctly inserted. Replace the faulty fan
unit.
39460, DC Link Voltage Too Low
Description
The DC link voltage is too low for the rectifier on drive
communication link arg, drive module arg.
Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The DC link bus bar may be incorrectly connected or the
three-phase mains power may be interrupted while the robot
is in the Motors ON state. The mains contactor may also have
been opened whilst the robot is in Motors ON state (breaking
the safety chain). The incoming main power supply may also
be too low.
Recommended actions
Make sure the DC link bus bar is correctly connected. Make
sure the mains supply has not been interrupted. Make sure the
safety chain has not been broken. Make sure the output voltage
of the drive module power supply is within acceptable limits as
specified in the Product Manual.
39461, DC Link Voltage Too High
Description
The DC link voltage is too high for the rectifier on drive
communication link arg, drive module arg.
Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The user program may contain too much hard braking of the
manipulators, which is more likely if the system contains
additional axes. The brake resistors may also be faulty.
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