Bio-Rad Peelable Foil Heat Seal - Manual (Page 18)

12
Replacing Fuses
Fuses will blow in the case of an electrical fault or a severe power surge. This process
protects the user and instrument from electrical hazards. Although fuses should never
need to be replaced, some institutions prefer to replace fuses on a regular basis to
maintain uninterrupted operation.
If the PX1 does not turn on, first confirm the power cord is in a functioning power
source within the instrument specifications. If the cord and AC power source
are fully functional, use the directions below to determine if the fuses are intact.
WARNING! To prevent electrical shock, always turn off and unplug the
instrument before checking the fuses.
WARNING! The fuses and other protection features have been designed not
to fail over the life of the instrument. If the fuses fail more than once, there may
be an electrical fault in the instrument. If this occurs, contact Bio-Rad customer
support for assistance.
Directions to Replace a Fuse (Figure 18)
1. Turn off and unplug the instrument. Remove power cord from the instrument.
2. Use a sturdy blunt object to gently pry open the fuse cover (A).
3. Use a small coin to unseat the fuse carrier (B).
4. Remove both fuses from the fuse carrier and inspect. If the wire is no longer intact,
the fuse is blown (C).
5. If either fuse is blown, install two new fuses (8 A, 250 V, 5 x 20 mm, Fast Blow) into
the fuse carrier (see Table 2).
6. Reinstall the fuse carrier using firm pressure to ensure it is fully seated.
7. Close the fuse cover.
8. Reconnect the power cord and turn on the instrument.
Fig. 18. Replacing the fuse.
A B C
Chapter 4 — Error Messages and Replacing Fuses