Universal Robots UR5 Service Manual page 109

7. Troubleshooting
C44A2 Elbow
C44A3 Wrist 1
C44A4 Wrist 2
C44A5 Wrist 3
C44A6 Tool
C44A80 CRC Check failure
on primary bus.
C45A AD-Converter error
C46A Loose gearbox or
bad encoder
mounting
C47A AD-Converter hit low
limit
C49A RS485 receive
warning
C49A200 Secondary RS485
bus is down
C50A Robot powerup issue Electrical error control box
C50A1 Voltage detected at
24V rail before
startup
C50A2 Voltage present at
unpowered robot
C50A5 Powersupply voltage
too low
C50A6 Powersupply voltage
too high
C50A11 Voltage not detected
at 24V rail after
startup
C50A15 Warning, waiting for
SafetySYS2
Service Manual
Interference on the
communication field bus.
Mechanical problem in gear
related to encoder mounting
EMC issue external or
electronics internal
Bus for: Teach Pendant,
Processor A and Processor
B on Control Board
103
a) Do a Complete rebooting
sequence
b) If this happens more than
two times in a row, replace
joint
Check grounding and
shielding for EMC problems
Check TCP/IP-12V cable to
Teach Pendant
Remove all external
connections to I/O-interface
of Safety Control Board.
Check for short circuit
Check 48 V cable between
power supply and Control
Board
UR5