Root Chapter 9: Service and Maintenance
www.masimo.com 88 Masimo
Replacing the Fuses
Should a power-related problem cause one or both of the fuses to fail, the
fuse(s) will need to be replaced. The fuses are 1 amp, metric, fast-acting,
5x20mm, 250V.
The fuses can be removed by hand or with a 5-millimeter or 3/16-inch
screwdriver.
To replace the fuse(s)
1. Power Off Root completely. Do not put in Standby Mode. See
Standby and Power Off on page 65.
2. Remove the AC power cord from the Power Entry Module in the
back panel.
3. Remove the fuse holder by pulling it forward from the Power Entry
Module.
4. Remove a fuse by gently pulling the top of the fuse away from the
center and then pulling up. The fuse should easily be removed. Do
not force.
5. Place a new fuse in the fuse holder.
6. If replacing both fuses, repeat steps 4 and 5 for the second fuse.
7. Slide the fuse holder back into the Power Entry Module and press
firmly to make sure it is secure.
Root is ready to be reconnected to AC power. If the fuses fail shortly after
replacement, Root requires service. See Repair Policy on page 90.
Power-On Self Test
To conduct a Power-On Self Test
1. Connect Root to AC power, and verify that the AC Power Indicator is
illuminated.
2. Power On Root. Within five (5) seconds, all available indicators will
illuminate, the device will emit a tone, and the Masimo logo will
display.
Nurse Call Setting Connections
For maximum flexibility, either normally open or normally closed signals are
available. During an alarm condition or a low Signal IQ event, depending on
the configuration of the device output, the normally open pin will be
connected to the common pin and the normally closed pin will be