# LED Indicator Flash Patterns

Apart from the LED flash patterns determined by the controller, there are a number of standard flash patterns for the tool LED indicators.

The table below provides an overview of the standard flash patterns.

LED indicator | Light behavior | Status
--- | --- | ---
All indicators | All flashing | Tool has started.
Battery level | All flashing white: high frequency flashes | Tool is running on the backup battery.
Battery level | One flashing red | Battery is empty.
Alarm | Flashing: one flash per second | Invalid configuration of tool WLAN settings in ToolsTalk Service 2.
Alarm | Flashing: high frequency flashes | Battery software outdated. It is not allowed to operate the tool with batteries running outdated software.
Radio connection | Blue | Radio connection established / ToolsTalk Service 2 connection established.
Radio connection | Flashing | Start request not received in time by the tool, due to bad connection.
Tightening direction | Both directions flashing: high frequency flashing, 3/s. | Software update is ongoing (takes up to 7 minutes).
Tightening direction | Both directions flashing: high frequency flashes followed by steady light. | Indicates one of the following: Invalid data on SD-card Error during tool software update SD card is missing
Tightening direction | Both direction flashing: low frequency, 1/s. | Tool is connected via USB cable and is waiting for ToolsTalk Service 2 to connect.