# Rectifying errors

Rotary laser display indicator | Laser receiver display indicator | Problem | Corrective measure
--- | --- | --- | ---
| − | Automatic shut-down (empty rechargeable/non-rechargeable battery) | Change the rechargeable or non-rechargeable battery as necessary.
| − | Automatic shut-down (operating temperature exceeded) | Adjust the measuring tool to the ambient temperature before switching it on. Then check the measuring accuracy and calibrate the measuring tool if required.
| −/PNK | Unsuccessful attempt to connect to the remote control (40) or the laser receiver (41) | Briefly press the button to close the error message. Start the connection process again. If it is not possible to establish a connection, please contact a Bosch customer service agent.
| − | Failed to establish a connection to the smartphone | Briefly press the button to close the error message. Start the connection process again see Remote control via Bosch Levelling Remote App. If it is not possible to establish a connection, please contact a Bosch customer service agent.
| − | Measuring tool is at a slant of more than 8.5 % or is not in the correct horizontal or vertical position. | Reposition the measuring tool so that it is in either the horizontal or vertical position. The re-levelling will start automatically.
| − | Maximum levelling time is exceeded | Reposition the measuring tool so that it is in either the horizontal or vertical position. Briefly press the button to restart the levelling.
| − | Change between the horizontal and vertical position without switching the measuring tool on/off | Briefly press the button to restart the levelling.
| ERR | Unsuccessful calibration of the X-axis | Cancel the calibration with by pressing the button. Ensure that the reception area of the laser receiver is perpendicular to the corresponding axis (X/Y) of the measuring tool. Restart the calibration.
| ERR | Unsuccessful calibration of the Y-axis
| − | Unsuccessful calibration of the Z-axis | Cancel the calibration with by pressing the button. Check that the measuring tool is aligned correctly. Restart the calibration.
| ERR | Unsuccessful CenterFind mode in relation to the X-axis | Press any button to close the error message. Check whether the measuring tool and laser receiver have been set up correctly. The laser receiver must be situated within the pivoting range of ±8.5 % of the measuring tool. Restart the mode.
| ERR | Unsuccessful CenterFind mode in relation to the Y-axis
GRL 650 CHVG:
| ERR | Unsuccessful CenterLock mode in relation to the X-axis | Press any button to close the error message. Check whether the measuring tool and laser receiver have been set up correctly. The laser receiver must be situated within the pivoting range of ±8.5 % of the measuring tool. Restart the mode.
| ERR | Unsuccessful CenterLock mode in relation to the Y-axis