# Tightening Operations LED Indicators

During tightening operations, the MTRwrench 85 LED Indicators give the operator a visual feedback on the progress and result of the ongoing tightening operation:

Operation stage | LED indicators behavior | Meaning
--- | --- | ---
Tightening program sent to wrench | Job Ready LED steady on |  | Wrench received the tightening program
Tightening in progress | Progress LED 1 blinking white |  | 10-25% of torque reached or Loosening detected
Tightening in progress | Progress LED 1 steady white |  | 25% of click torque reached
Tightening in progress | Progress LED 1 steady white Progress LED 2 blinking white |  | 40% of click torque reached
Tightening in progress | Progress LED 1 steady white Progress LED 2 steady white |  | 55% of click torque reached
Tightening in progress | Progress LED 1 steady white Progress LED 2 steady white Progress LED 3 blinking white |  | 70% of click torque reached
Tightening in progress | Progress LED 1 steady white Progress LED 2 steady white Progress LED 3 steady white |  | 85% of click torque reached
Tightening completed successfully | All Progress LEDs blink off |  | 100% of click torque reached
Tightening result | All Progress LEDs steady green + Projection LED steady green | + | Result OK
Tightening result | All Progress LEDs blinking red + Projection LED steady red | + | Result Not OK Possible causes according to tightening strategy: Max torque exceeded. Max Angle exceeded. Time out. Accidental loosening. Wrong location. Rehit. Fast tightening. Torque drop.

Relevant Information

- Errors and Warnings LED Indicators