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Routine Maintenance
4. Perform the electrical safety tests detailed in Performance Verification section. If
the unit fails these electrical safety tests, do not attempt to repair. Contact Nellcor
Technical Services Department or your local Nellcor representative.
2.3 Functional Checks
The following checks should be performed at least every 2 years by a qualified service
technician.
1. If the monitor has been visibly damaged or subjected to mechanical shock (for
example, if dropped), perform the performance tests as described in Performance
Verification section.
2. Perform the electrical safety tests as described in Safety Tests section. If the unit
fails these electrical safety tests, refer to Troubleshooting section.
3. Inspect the fuses for proper value and rating (qty 2, 4.0 A, 250 volts).
2.4 Batteries
If the N5500 has not been used for a long period of time, the battery will need charging.
To charge the battery, connect the N5500 to an AC outlet as described in Paragraph
3.3.1 in this service manual or the Battery Operation section of the operator's manual.
Nellcor recommends replacing the instrument's battery every 2 years. When the N5500
is going to be stored for 2 months or more, it is recommended to remove the battery
prior to storage. To replace or remove the battery, refer to Disassembly Guide .
Note: Storing the N5500 for a long period without charging the battery may degrade the
battery capacity. The battery may require a full charge/discharge cycle to restore
normal capacity. Nellcor recommends that the N5500's sealed, Ni-MH batteries
be replaced at 2-year intervals. Refer to Disassembly Guide Section.
Note: The battery cannot be charged by an external DC power source.
2.5 Environmental Protection
Follow local governing ordinances and recycling plans regarding disposal or recycling
batteries and other device components.
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N5500 Service Manual
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Troubleshooting
