Troubleshooting
Any error message can be deleted with a short press of button E. The table shows the related description
and possible solutions.
The next service center should be contacted if a different error message as shown at the table will be
displayed.
Error
Description
codes
21
Temporary EEprom problem
120
HI alert - Unit Height changed
130
Mechanical Limit during Grade Match / PlaneLok
140
Laser beam blocked
141
Time Out - Alignment could not be completed in
the allowed time
No receiver – HL760/HL760U Receiver not
150
available for single axis automatic function
152
No receiver - The laser searched for the receiver
but could not find it
153
Lost Receiver - The laser searched and found the
receiver but then lost it
More than two paired receivers are available
155
during automatic alignment function.
160
X or Y level sensor defect
Solution
Press the E button to deletet the error message
Check laser beam elevation
Check if existing slope is above +/-9%
Make sure there are no obstacles between the
transmitter and the HL760/HL760U
Check radio operating range/ connection; check stable
laser setup
Make sure the HL760/HL760U is on and paired
Check the operating range for auto function and restart
the auto alignment
Check the operating range for auto function and restart
the auto alignment
Make sure only two HL760/HL760U receivers are
turned on.
Contact service center
28