Maintenance
HELiOS Marathon
TM
H850 Portable Oxygen Unit Home Use Guide
39
Caution
Do not allow water into any of the controls, the fill
connector, or the oxygen supply connector.
Replacing the Reservoir Battery
A yellow light appears on the reservoir contents
indicator when the battery requires replacement.
Have the oxygen supply company change your
battery at their next visit or change the battery
yourself. To change the battery, use a coin to open
the battery door and replace the 9-volt alkaline
battery.
Figure 23.
Opening Battery Door with Coin
Figure 24.
Battery Replacement
