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12-30 Cabinet maintenance operations
Procedure 12-6 (continued)
Adjusting the load sharing for replacement rectifiers
Step
2
Table 12-12
Rectifier load sharing adjustments
If the RFA LED
And the number
indication is
of rectifiers
that
installed is
Only one
two
RFA LED
illuminated
GREEN
Only two
three
RFA LEDs
illuminated
GREEN
All installed
any number of
rectifier RFA
rectifiers
LEDs
illuminated
GREEN
3
4
AccessNode 323-3001-210 Issue 1.0
Action
Perform the load sharing adjustment steps shown in Table 12-12.
Note: Table 12-12 lists the RFA LED indications and the associated steps to
coarsely adjust the load sharing of multiple rectifiers.
Then the indication
means
that the rectifier with the
GREEN RFA LED is
floating slightly too high
that the rectifier with the
RED RFA LED is floating
slightly too low
that the rectifiers are
sharing the load closely
Repeat from step 1 until all rectifiers RFA LED are illuminated GREEN.
Examine and compare the display of the ammeters on the rectifiers.
Note: Nortel Networks recommends that the ammeters of all installed
rectifiers read within 0.1 V dc of each other for proper load sharing.
—continued—
Then perform
these steps
slowly and very slightly adjust the FLT
potentiometer of the rectifier that has
the RFA LED illuminated GREEN
counterclockwise until the RFA LEDs
of at least one of the other rectifiers
illuminate GREEN.
Go to step 3.
slowly and very slightly adjust the FLT
potentiometer of the rectifier that has
the RFA LED illuminated RED
clockwise until the RFA LED
illuminates GREEN.
Go to step 3.
go to step 4.
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