A7™ Service Manual 046-006272-00 1 - 3
Theory of Operation Introduction
When the A7 uses AC power supply, the A7 power management system supplies power for its main
system while charging its internal battery. In case of an AC power failure, the A7 operates on battery
power, two new batteries supporting normal running in a minimum of 90 minutes. The main system
switch can power on and off the system. The four auxiliary AC sockets on the A7 at the rear of the
machine operate independent of the main system switch.
NOTE: The warmer for the patient breathing circuit system does not operate
when the A7 is working on battery power.
NOTE: If the main switch is set to OFF, the O2 supply is turned off.
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