# LED Indicators Overview

The MTRwrench 85 HMI is equipped with four LED indicators that show different wrench statuses, and along with a set of three LED indicators that communicate progress and results of operations.

An additional Front Projection LED is available to communicate the results of tightening operations in situations where the operator cannot fully see the HMI.

Position | Name | Main indications
--- | --- | ---
A | Progress LEDs | Tightening operations progress and results. Zero adjustment progress and result. Transducer overloaded. Firmware upgrade Battery charge level during recharge on cradle
B | Job Ready LED | Tightening program successfully sent to the wrench.
C | Front Projection LED | Tightening operation's result.
D | Battery Level LED | Low battery level. Empty battery.
E | Radio Communication LED | Status of the wireless communication
F | Error/Warning LED | Transducer overloaded. Zero adjustment error. Calibration required (date expired, maximum tightening performed)

In this Section

- Battery Level LED Indicator
- Radio Communication LED Indicator
- Job Ready LED Indicator
- Zero Adjustment LED Indicators
- Charging LED Indicators
- Tightening Operations LED Indicators
- Errors and Warnings LED Indicators