Invacare MicroAIR MA50 User Manual
Page 21
4 OPERATION
21
Power Button
1.
To turn the control unit on or off, press and release the Power button (
).
Static/Alternating Pressure Button
1.
Press the Alternating Pressure button (
) to select between Static Mode and one of four Alternating Pressure Times.
Adjusting the Minimum Pressure Setting (A/P Low)
The minimum pressure setting during Alternating Pressure is set to 0 (2 mmHg) at the factory. This means that the mattress will deflate as much as
possible during the deflation time when using 10, 15 or 20 minute Alternating Pressure times. The setting can be changed so the mattress will only
deflate to 50% of the selected pressure setting.
1.
Ensure the Standby LED is lit.
2.
Perform one of the following:
Once the unit is plugged in, an Amber led on the control unit is lit indicating that the system is in stand by mode. Once the
Power button is pressed and released, a green led illuminates indicating that the control unit is on.
If the power comes on after a power outage, the control unit will go through its system initialization routine for a few
seconds and then resume the desired function.
The alternating pressure times indicate the frequency of deflation or inflation of half of the air cushions (even or odd
numbered). For example, 10 minutes is selected. In this example, the even numbered air cushions in the mattress will
deflate, while the odd numbered cushions remain at constant pressure. When 10 minutes has elapsed, the even numbered
air cushions will inflate while the odd numbered cushions remain at constant pressure. When 10 minutes has elapsed again,
the odd numbered air cushions deflate while the even numbered cushions remain at constant pressure. The air cushions
continue to inflate or deflate like this as long as an alternating pressure time has been selected. At all times, half of the air
cushions remain at a constant pressure when an alternating pressure time has been selected.
In Static Mode, all air cushions in the mattress are maintained at constant pressure. The Static LED is illuminated Green.