Comtech EF Data XTD-750C-B1 Operation And Installation Manual page 77

Fault Log
Engry
Tub ILOK TWT Thermal Interlock Fault
Twt Temp TWT Temperature Fault
Twt1 Tmp TWT Temperature Fault for
TWT 1 in dual tube units.
Twt2 Tmp TWT Temperature Fault for
TWT 2 i dual tube units.
UC Fault Upconverter Fault
VSWR FLT Factory Set Reverse RF Power
Fault
WgArc 1 Waveguide Arc Fault 1 on a
multi-waveguide arc
configuration.
MNC-0400-048
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Table 1 TWT Fault Log Troubleshooting
Description
13 of 14
Operation, TWTA ODU Amplifier
Possible Cause of
Fault
The TWT Check cooling
temperature has system for air
exceeded that blockage and
manufacturer's max properly operating
level. fans.
The measured TWT Check cooling
temperature system for air
exceeds the set blockage and
limit. properly operating
fans.
The measured TWT Check cooling
temperature system for air
exceeds the set blockage and
limit. properly operating
fans.
The measured TWT Check cooling
temperature system for air
exceeds the set blockage and
limit. properly operating
fans.
The block- Check that the
upconverter is reference signal is
reporting a fault. connected and at
the right power leel.
The RF output Check for properly
power has connected
exceeded the waveguide, and a
manufacturer's properly terminated
power limit. load.
A waveguide arc Check for properly
was detected before connected
the isolator. waveguide, and a
properly terminated
load.
Action Needed to
Clear Fault
Revision B