Power - Nellcor OxiMax N-600x Service Manual

Power

O M N-600x Service Manual
XI AX
Power problems are related to AC and/or DC. Table 7 lists recommended actions
to power problems.
Symptoms
Low Battery indicator
lights steadily while
N-600x is connected to
AC and the battery is not
discharged.
The N-600x generates an
error code when dis-
connected from AC
power, and the monitor is
powered up.
Low Battery indicator on
during DC operation and
an alarm is sounding.
Table 7: Power Problems
Recommended Actions
• Ensure the N-600x is plugged into an operational
AC outlet and the AC indicator is lit.
• Check the fuses. The fuses are located in the
Power Entry Module as indicated in Replacing
the Fuse on page 84. Replace if necessary. Open
the monitor as described in Disassembling the
Monitor on page 85. Install a new battery and
verify the charging voltage output to the battery
while on AC power when first turning on the
monitor. The charging voltage increases to 7.05 -
7.35 volts if the battery is good, the charging
voltage decreases over time. Replace the power
supply if the above charging values are not met.
• Check the harness connection from the bottom
enclosure to the Main Board PCB, as instructed
in Main Board PCB Replacement on page 97. If
the connection is good, replace the Main Board
PCB.
The battery may be discharged. To recharge the battery,
refer to Battery Charge on page 16. The monitor may be
used with a less than fully charged battery but with a
corresponding decrease in operating time from that charge.
The battery may be defective.
There are less than 15 minutes remaining of usable charge
left on the N-600x battery before the instrument shuts off.
At this point, if possible, cease use of the N-600x on
battery power, connect it to an AC source and allow it to
recharge (approximately eight hours). The N-600x may
continue to be used while it is recharging. (A full recharge
of the battery while the monitor is being used takes 12
hours.)
Troubleshooting
65