ABB IRC5 Operating Manual page 209

Recommended actions
Make sure the power cable from the power supply unit to the
main drive unit is connected correctly. Check if the power supply
unit LED is red. The full meaning of all LED indications are
described in the Trouble Shooting Manual, IRC5.
39502, Logic Voltage to Rectifier Error
Description
The 24V to the rectifier in drive module arg is out of range.
Consequences
Probable causes
The cable between the drive unit and the rectifier may be badly
connected, or the power supply voltage to the drive unit may
be out of range.
Recommended actions
Check that the power cable between the power supply unit and
the rectifier unit has been connected correctly. Check the 24 V
voltage in the power cable to the drive unit.
39503, Power Supply Overtemperature
Description
The temperature in the drive module power supply of drive
module arg has reached a critical level.
Consequences
No operation will be possible until after correcting the fault. The
system goes to status SYS HALT.
Probable causes
The fan unit may be faulty, the cooling air flow may be
obstructed or the ambient temperature may be too high.
Recommended actions
NOTE! Do not try to restart the controller for approx. ten minutes
to let it cool down. Make sure the fans are running and that the
air flow is not obstructed. Make sure the ambient temperature
does not exceed the drive module rating. Make sure the power
supply connectors are correctly connected to the axis computer.
39504, Power Supply to Brakes Overload
Description
The brake power circuit in drive module arg draws too much
current.
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 brake power cable may be faulty (short circuit), or additional
axis motors with brakes consuming too much power may be
used. The fault may also occur if the cable from the power
supply unit is not correctly connected to the drive module.
Recommended actions
Make sure the power supply cable is correctly connected to the
drive module. Check the brake supply cable for short circuits.
Make sure the total current consumed by additional axes'
motors does not exceed the specification for the drive module.
Make sure the power supply connectors are correctly connected
to the axis computer. Make sure the 24 V BRAKE voltage is
within specified limits. See the circuit diagram in the Product
Manual, IRC5.
39505, Mains Voltage to Power Supply Lost
Description
The mains power supply to the power supply unit in drive
module arg is missing.
Consequences
No operation will be possible until after correcting the fault. The
system goes to system failure state.
Probable causes
The main power switch on the drive module may be turned off.
The incoming mains cable may be faulty (break), or the circuit
breaker for the power supply may have tripped. The fault may
also occur if the connector from the power supply unit is not
correctly connected to the axis computer.
Recommended actions
Check that the main power switch in turned on for the drive
module and restart the controller. Check that the connector
from the power supply unit is correctly connected to the axis
computer. Measure the voltage at the mains contactor to ensure
that the mains is present. Check that the power supply
fuses/circuit breakers in the drive module have not tripped.
39506, DC bus status not ok
Description
The DC bus off one or more drive units connected to drive
module arg has been unexpectedly switched off.
Consequences
System goes to status SYS HALT.
Probable causes
This may be due to bad cables or internal errors in the drive
unit.
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