Universal Robots 2014350001, Service Manual, Page: 160 / 238

C274A3 Control box fan error Check Fan speed
C275A0
to
C275A6 Brake release Check payload settings.
Check for robot stuck.
C276A Uart between
microprocessor
C276A0
to
C276A14 Critical error A critical error occurred in
the UART driver a) Do a Complete rebooting
sequence
b) Update software
c) Contact your local
Universal Robots service
provider for assistance.
C277A1
to
C277A11 Memory Memory allocation Release some memory from
the programs or check
URCap or too much files in
the robot
C278A Servo in Joint A
processor
C278A0
to
C278A13 Critical error A critical error occurred in
the servo module a) Do a Complete rebooting
sequence
b) Update software
c) Contact your local
Universal Robots service
provider for assistance.
C279A Flash in joint
C279A0
to
C279A20 Critical error A critical error occurred in
the flash driver a) Do a Complete rebooting
sequence
b) Update software
c) Contact your local
Universal Robots service
provider for assistance.
C280A Real-time error
C280A0
to
C280A9 Critical error A critical real-time error
occurred a) Do a Complete rebooting
sequence
b) Update software
c) Check communication
between joints
d) Contact your local
Universal Robots service
provider for assistance.
C281A Robot State Machine
UR5 154 Service Manual
7. Troubleshooting
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