Troubleshooting Guide
D255/D256/M281/M282 6-120 SM
Flowchart to determine parts to replace when SC672 occurs.
Parts How to determine the cause
USB cable
LED on controller blinks once every second
Operation panel
LED on controller blinks once every second
Controller LEDs on controller blink constantly
Flowchart to determine which parts to replace when no display on Operation Panel.
Parts How to determine the cause
USB cable
LED on controller blinks once every second
Operation Panel
LED on controller blinks once every second
BiCU Fuse 1 on the BiCU
Controller LED on controller does not blink
Rev. 02/09/2017
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