Universal Robots UR5 Service Manual page 124

C55A52 5V, 3V3 or ADC error
(5V too low)
C55A53 5V, 3V3 or ADC error
(5V too high)
C55A90 Bootloader error,
robot voltage too low
or current too high
C55A91 Bootloader error,
robot voltage too high
C55A100 Safety violation
C55A101 Safety Channel Error
in Safety Control
Board
C55A102 Safety Channel Error
in Screen
C55A103 Safety Channel Error
in Euromap67
Interface
C55A109 Received fault
message from PC
C55A110 Safety State is
changing too often
C55A111 On/Off State is
changing too often
C55A112 Robot current sensors
readings differ
C55A120 Robot current is too
high while emergency
stopped
C55A121 Robot current is too
high while safeguard
stopped
UR5
Safety Control Board
hardware fault
Safety Control Board
hardware fault
118
7. Troubleshooting
a) Do a Complete rebooting
sequence as per section
5.3.7
b) If this happens more
than two times in a row,
replace Safety Control
Board
a) Do a Complete rebooting
sequence as per section
5.3.7
b) If this happens more
than two times in a row,
replace Safety Control
Board
User Manual