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Power
N-595
Power problems are related to AC and/or DC. Table 5 lists recommended actions
to power problems.
Condition
Battery Low indicator
lights steadily while
N-595 is connected to
AC and battery is not
discharged.
The N-595 generates an
error code when
disconnected from AC
power.
Battery Low indicator on
during DC operation and
an alarm is sounding.
Table 5: Power Problems
Recommended Action
•
Ensure that the N-595 is plugged into an
operational AC outlet and the AC indicator is on.
•
Check the fuses. The fuses are located in the
Power Entry Module as indicated in Fuse
Replacement on page 64. Replace if necessary.
•
Open the monitor as described in Monitor
Disassembly on page 65. Verify the power
supply's output to the battery while on AC.
Disconnect the battery leads from the battery and
connect a DVM to them. The voltage measured
should be 6.65 to 6.95 VDC and the current
should be 320 to 480 mA. Replace power supply
if above values are not met.
•
Check the harness connection from the bottom
enclosure to the User Interface PCB, as instructed
in User Interface PCB Removal/Replacement on
page 76. If the connection is good, replace the
User Interface PCB.
The battery may be discharged. To recharge the battery,
refer to Battery Charge on page 12. 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 15 or fewer minutes of usable charge left on the
N-595 battery before the instrument shuts off. At this
point, if possible, cease use of the N-595 on battery power,
connect it to an AC source and allow it to recharge
(approximately 14 hours). The N-595 may continue to be
used while it is recharging. (A full recharge of the battery
while the monitor is being used takes 18 hours.)
Troubleshooting
53
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