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Flow-Fault Alarm (Fig. 31)
Oxygen Flow LED (O
conjunction with an inhalation event. A FLOW-FAULT
ALARM indicates that an inhalation has been detected,
but that an adequate amount of oxygen has not been
delivered.
A FLOW FAULT ALARM typically means that either:
1. The oxygen cylinder valve is not open.
2. The oxygen supply line is pinched or disconnected.
3. The valve in the OPC unit has failed to operate.
A FLOW FAULT ALARM is not necessarily a low oxygen
pressure warning.
Low Battery-1 Alert (First Warning) (Fig. 32)
Battery Warning LED displays continuous single flashes.
From the time a LOW BATTERY-1 ALERT is first issued,
the OPC should continue to operate properly for about
another eight (8) hours (@ 77°F/25°C, and depending on
battery quality).
Low Battery-2 Alarm (Second Warning) (Fig. 33)
Battery Warning LED displays continuous double flashes.
From the time a LOW BATTERY-2 ALARM is first issued, the
OPC may continue to operate for about another two (2) hours.
•
REPLACE THE BATTERIES IMMEDIATELY if either of
the LOW BATTERY Warnings are received during the
PHODS PRE-FLIGHT CHECKLIST.
•
If operation continues beyond the Second Warning,
the batteries will ultimately deplete to the point where
the valve ceases firing. At this point, the OPC will no
longer be dispensing oxygen (see BATTERY LIFE
AND DEPLETION).
Fresh batteries should be installed prior to each mission.
) flashes rapidly for 2 seconds in
2
(Inhalation)
In
1 Sec
O
2
Figure 31
FLOW FAULT ALARM
coincides with inhalation independent of inhalation
occurs only at inhalation repeats until inhalation
indicates a problem with
oxygen supply (valve,
supply tubing, etc.)
1 Sec
2 Sec
3 Sec
O
2
Figure 32
BATTERY-1
1 Sec 2 Sec
3 Sec
O
2
Figure 33
BATTERY-2
19
2 Sec
APNEA ALARM
detected
indicates a problem with
oxygen delivery (outlet
tubing, cannula, etc.).
4 Sec
(repeats / 2 sec)
LOW
4 Sec
(repeats / 2 sec)
LOW
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