Varian XGS-600 Instruction Manual page 44

Problem
BDCOMM message appears on
one or more channels and stays
Display goes blank
4-8
XGS-600 Gauge Controller
Table 4-2 Troubleshooting (Continued)
Cause
A major EMI disturbance or
other anomaly has caused a
non-recoverable software error
A major EMI has caused a
display or software error
Action
Cycle AC (mains) power to the
unit OFF and ON again to
recover
Cycle AC (mains) power to
the unit OFF and ON again
to recover, or wait for the
automatic screen refresh
(every 20 minutes)