Kegel FLEX 17-5801 Operator's Manual page 157

Whisker errors are generated when the whisker is already pulled away from the switch when
the machine is started.
A whisker or switch that is damaged or just out of adjustment can cause this error. Input
109 is for the 7 pin and input 110 is for the 10 pin.
Normally this Walker error screen appears when Input 1CH 06 fails to receive a signal within
1.5 seconds of the 7-pin Approach Motor starting. On the following page are the possible
causes that can produce an APPROACH 7 PIN error.
In a pinch you may bypass the sensor temporarily in order finish conditioning the lanes. If
the machine is powered down, it will reset back to normal operating mode.
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