Homing KEY MASTER - Er11: Motor Sensor Failure

key master A2.5 Version Manual www.hominggame.com
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9、 When Er10 appears on the digital display it shows not connect with accounter .
As picture
9，10
9 10
Trouble shooting: Inserted the accounter lines or may be the accounter is broken.
10.When Er11 appears on the digital display it shows not find the left and right motors sensor
.
As picture 11