RUNRACE : Service & Maintenance Manual - rev. 2.0
Page 6.31
6.8. THE LCD SHOWS “GRADE MOVEMENT OUT OF ORDER”
The machine displays this error if it is unable to control the up-down motor.
"GRADE MOVEMENT OUT
OF ORDER"
Are 2 LEDs on the up-down
board both OFF?
Is the supply to the up-down
motor correct when the actuation
command arrives?
YES
NO
YES
1
2
A
Does the CPU board send the
correct control signal?
NO
NO
Replace the CPU board
Does the up-down board receive
the correct control signal?
NO
Check and/or replace
cable RN-2
YES
Replace the up-down
board
YES
3
5
B
Does the free connector CN1
receive the correct control signal?
4
NO
Check and/or replace
cable RN-1
YES
Continued on the following page.
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