Universal Robots UR3 Service Manual page 110

C50A31 The other safetySYS
do not initialize
C50A40 Wrong voltage from
PSU1
C50A41 Wrong voltage from
PSU2
C50A42 Voltage will not
disappear from PSU
C50A43 Warning, waiting for
CB2 type answer
from primary
processor
C50A50 Processor A 3.3V
supply voltage out of
bounds
C50A51 Robot voltage below
threshold
C50A52 Robot voltage above
threshold
C50A53 58V generator
deviation error
C50A54 5V regulator too low
C50A55 5V regulator too high
C50A56 -4V generator too
low
C50A57 -4V generator too
high
C50A80 Last CPU reset
caused by Low-
Power-Reset
C50A81 Last CPU reset
caused by Window-
Watchdog-Reset
C50A82 Last CPU reset
caused by
Independent-
Watchdog-Reset
C50A83 Last CPU reset
caused by Software-
Reset
UR3
The Control Board was
reset on explicit request.
104
7. Troubleshooting
Service Manual