# Errors and Warnings LED Indicators

The MTRwrench 85 Error/Warning LED indicator, along with the Progress LEDs, shows the operator of detected errors or damages.

LED indicators | Diagnosis | Corrective actions
--- | --- | ---
Warning LED blinking red |  | Minor transducer overload (120 to 150% of nominal torque) | Place the wrench into the cradle to perform a zero adjustment.
Progress LEDs all blinking red + Warning LED steady red | + | Wrench locked due to major transducer overload (>150% of nominal torque) | Stop running tightening operations and contact Atlas Copco Customer Service.
Progress LEDs blinking white + Warning LED blinking red | + | Zero adjustment failed due to wrench moving or to load being applied to the transducer. | Remove the wrench and place it again into the cradle to start a new zero adjustment.
Progress LEDs steady red + Warning LED blinking red | + | Zero adjustment failed due to wrench moving or to load being applied to the transducer for a second time during the zero adjustment. | Remove the wrench and place it again into the cradle to start a new zero adjustment.
Progress LEDs off + Warning LED blinking red | + | Calibration or mechanical service required. | Send wrench to service

Relevant Information

- Performing a Zero Adjustment