Error
codes
Description
Solution
21
Temporary EEprom problem
Repeat pairing and re-enter the customer settings
120
HI alert - Unit Height changed
Check laser beam elevation
130
Mechanical Limit during Axis Alignment or Grade
Match
Re-align the closer to the alignment point; check if existing
slope is above +/-25%
131
Rake Angle Limit
Pre-tilt the unit closer to the alignment point
140
Laser beam blocked
Make sure there are no obstacles between the transmitter
and the HL750 or SF601
141
Time Out - Alignment could not be completed in the
allowed time
Check radio operating range/ connection; check stable laser
setup
150
No receiver - Receiver not available for single axis
automatic function
Make sure the receiver is on and paired
151
No receivers - Both receivers are not available for
automatic alignment function
Make sure both receivers are on and paired
152
No receiver - The laser searched for the receiver but
could not find it
Check the operating range for auto function and restart the
auto alignment
153
Lost Receiver - The laser searched and found the
receiver but then lost it
Check the operating range for auto function and restart the
auto alignment
160
X,Y or Z level sensor defect
Contact service center
Any error message can be deleted with a short press of
button 4 (OK).
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 Messages
