4 Troubleshooting Troubleshooting Guide
72
MSL-related problems
Symptoms Possible Causes of Failure Failure Isolation and Remedy
Measurement Server does
not start up (no LEDs
active), no INOP or
prompt displayed
No Power
Check MSL cable and replace if
necessary
Check MSL connector board and
replace if necessary
Measurement Server does
not start but LEDs are
normal
Communication lines in MSL cable
or MSL connector broken
Check MSL cable and MSL
connectors
MSL connector board defective
Check MSL connector board and
replace if necessary
MSL Power High INOP is
issued
Note: if this condition
persists for longer than 15
minutes, the INOP MSL
Power Off will appear (see
below)
Attached devices drawing too much
power from the monitor. Too many
FMS and MMS connected to the
monitor
Reduce to a limit of 1 FMS and 1
MMS connected to the monitor
MSL Power Off INOP is
issued
Attached devices drawing too much
power from the monitor. Too many
FMS and MMS connected to the
monitor
Disconnect all FMS and MMS
from the monitor
Cycle power to restore power to
the MSL devices.
If the message disappears,
reconnect FMS and MMS one at
a time, waiting 15 minutes
between each device to see if
message reoccurs. If yes, the
respective MMS or FMS is faulty.
See Multi-Measurement Server or
Flexible Module Server for
troubleshooting tasks. If no, add
front-end modules one at a time,
waiting 15 minutes between each
module to see if message
reappears, Replace module if
faulty.
Note: If an individual defective
device is connected the MSL
Power High or MSL Power
Overload INOPs will appear
initially. The MSL Power Off
INOP will not occur for at least
15 minutes.
MSL Power Overload
INOP is issued
Short Circuit within MSL system Disconnect all MSL connections
including Measurement Server
Mount, 2nd MSL interface, 1st
MSL interface. Reconnect devices
one at a time. If message persists,
replace main board.
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