Error description 237-13821
Error message
13821 UM (FS.B): 3.3V(FS.A) voltage monitor below limit CC%2 %1
Cause of error
- The internal voltage monitor detected that the 3.3 V voltage of the FS.A is too low
Error correction
Restart the control; if the error occurs again, then:
- Check the X76 jumper plugs
- Replace device
- Inform your service agency