Extreme Networks ES8500A User Manual page 16

SYMPTOM
Show E0 Not equip Safety key
Show E1 Speed feedback equipment err
Show E2 Motor or Motor drive err
Show E3 The error of Speed over limit
CAUSE SOLUTION
Please equip the Safety key
1.Please check Speed feedback equipment
and 10-pin cable or contact special service
2.caused by overload of the user weight,3 lights
display at the same time on the controller. Please
switch off the power,and restart in 30 seconds.
Please check PIN cable or contact special
service
Adjust Speed feedback
contact special service
equipment or