UMAY U50 - Ⅶ. Trouble Shooting

VII. Trouble Shooting
Error Code
Reason
How to solve
NO DISPLAY
A) electricity not
connected
Connect the electricity
B) Power switch not turn
on
Turn on power switch
C) PCB no power or
broken
Press over-load protector or change new pcb
D)signal wire not
connected
Re-connect signal wire or change new one
E) computer broken
Change new computer
F) background light broken
Check background light wire or change new one
E-01
Poor connection between
the display and controller.
Check each joint, change a new line if it is
broken.
E-02
Over current protection
Turn off and re-start machine, if still has
problem, need to check motor or main PCB if
they are broken
E-03
Over-load protection
Turn off and re-start machine, if still has
problem, need to check motor or main PCB if
they are broken
E-10
Main PCB Over-heating
protection
Turn off and re-start machine, if still has
problem, need to check motor or main PCB if
they are broken
E-12
Over-voltage protection
Check the input voltage is normal or not, then
turn off and re-start machine. If still has
problem, change the main PCB.