Emerson FB2100 Field Replacement Manual page 13

FB2100/FB2200 Flow Computer 30W Solar Panel Field Replacement Guide
D301824X012
November 2020
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With the thumb and index finger on your other hand, twist the other end of the fuse holder
counterclockwise to separate the two halves of the fuse holder.
Pull out the old fuse and discard it.
Put the new fuse in the holder and put the two ends of the holder together.
Twist the threaded end clockwise until the fuse holder is closed.