Error 91
Error Message Displayed to user
•
E91
•
Notify Maintenance Mechanical Brake Error
Keep error on screen until
OK
button pressed.
Condition
Error sent by the Motor Controller when it detects the mechanical brake has failed which is detected when the Motor
Controller has the brake locked but RPM's / movement is detected and it shouldn’t be.
Cause
• Jammed mechanical Brake
• Worn mechanical brake
• Cable
• Motor Controller
• Encoder
Remedy
• Check / reseat brake cable. Repair / replace as needed.
• Check for brake jamming or slippage. Repair / replace as needed.
• Check brake and encoder securement to shaft. Repair / replace as needed.
• Check encoder for damage. Replace as needed.
• Replace Motor Drive Board
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