Led Indicators And Fuse On Safety Control Board; Led Indicators On Safety Control Board; Fuse - Universal Robots e Series Manual

6. Troubleshooting

6.4. LED indicators and Fuse on Safety Control Board

6.4.1. LED Indicators on Safety Control Board

The below LEDs are "power" LEDs. They are either on or off.
LED for power
• Green color permanent = Power on
• No color permanent = Error or no power
Below are "communication" LEDs. They flash in different patterns, depending on the status.
LED for Safety A and Safety B
Green fast flash = Bootloader
Green slow flash = Normal communication
Red permanent = Error (Red flash can happen during bootup/power on, this is normal.)
LED for FPGA
Green/Red permanent = Normal communication
Green slow flash = No communication/trying to establish communication

6.4.2. Fuse

Fuse is a 10A fast-acting mini blade fuse.
Service Manual 93 e-Series