NM2B TROUBLESHOOTING GUIDE (continued)
3.2 Battery
While the machine is operating from an AC line, the battery voltage at full
charge should be within the range of 12.83 to 14.18 VDC. Battery voltage can
be measured between J7-3(+) and J7-4(-). During battery operation, the low
battery cutoff voltage should be within the range of 9.79 to 10.82 VDC.
3.3 Troubleshooting Guides
Table 3-2 lists common failure modes and symptoms (excluding simultaneous
multiple faults) for the monitoring and display devices in the NARKOMED 2B.
Each failure mode or symptom is keyed to a troubleshooting guide flow chart
on the following pages to assist in locating a problem. These flow charts
assume that the machine is plugged into an AC outlet with the correct voltage,
and the machine is not running on its backup battery.
TABLE 3-2: NARKOMED 2B FAILURE MODE AND SYMPTOM LIST
FAILURE MODE / SYMPTOM CORRECTIVE ACTION
Loss of O
2
Monitor Guide 1
Loss of Breathing Pressure Monitor Guide 2
Loss of Respiratory Volume Monitor Guide 3
No Audio Alarms Guide 4
Vitalink Failure Guide 5
Incorrect Display Guide 6
No Oxygen Ratio Monitor Alarms Guide 7
No Oxygen Supply Pressure Alarms Guide 8
Display Screens Blank Upon System Power-up Guide 9
No Keypanel Response Guide 10
Rev. A
3-3
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