ZyWALL 5/35/70 Series User’s Guide
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APPENDIX A
Removing and Installing a Fuse
This appendix shows you how to remove and install fuses for the ZyWALL.
If you need to install a new fuse, follow the procedure below.
" If you use a fuse other than the included fuses, make sure it matches the fuse
specifications in the product specifications chapter.
Removing a Fuse
" Disconnect all power from the ZyWALL before you begin this procedure.
1 Place the rear panel of the ZyWALL in front of you.
2 Remove the power cord from the back of the unit.
3 The fuse housing is located between the power switch and the power port. Use a small
flat-head screwdriver to carefully pry out the fuse housing.
4 A burnt-out fuse is blackened, darkened or cloudy inside its glass casing. A working fuse
has a completely clear glass casing. Pull gently, but firmly, to remove the burnt out fuse
from the fuse housing. Dispose of the burnt-out fuse.
Installing a Fuse
1 The ZyWALL is shipped from the factory with one spare fuse included in a box-like
section of the fuse housing. Push the middle part of the box-like section to access the
spare fuse. Put another spare fuse in its place in order to always have one on hand.
2 Push the replacement fuse into the fuse housing until you hear a click.
3 Firmly, but gently, push the fuse housing back into the ZyWALL until you hear a click.
4 Plug the power cord back into the unit.
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