Troubleshooting
Any error message at the RC402N 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
160
X or Y level sensor defect
Solution
Press the E button to deletet the error message
Check laser beam elevation
Contact service center
22