Codan 6725-W/E-AC/EX-CE - Figure 17: BUC Fault Diagnosis Chart 2

Maintenance and fault finding
88 Block Up Converter Systems 6700/6900 series User Guide
Figure 17: BUC fault diagnosis chart 2
BUC fault
diagnosis chart 2
Is
Tx Power
Alarm
OK?
Check the IF level
(Test D)* and the
output power alarm
threshold and adjust
as required.
Is
BUC Temp
OK?
Check faults using
VFS command.
Does
BUC have
a fan?
See BUC fault
diagnosis chart 3.
See BUC fault
diagnosis chart 4.
* Refer to test
procedures
Reset latched
faults using RLF
command.
Wait for BUC to cool
down. Ensure air flow
around BUC is not
restricted.
No
Yes
No
Yes Yes
No