Invacare MA65 Owners Manual - Page 20

microAIR® MA65 Series 5.1.2 Alternating Pressure Button 1. Press the Alternating Pressure button B to select between one of four alternating pressure times - 5, 10, 15 and 20 minutes. 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. 5.1.3 Adjusting the Minimum Pressure Setting (A/P Low) The minimum pressure setting during Alternating Pressure is set to 0 (8±4 mmHg) at the factory. This means that the mattress will deflate as much as possible during the deflation time when using 5, 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. Press and hold the Alternating Pressure B and Fowler F buttons. 3. Read the LCD Display. The LCD Display will show: • 0 if the current setting is 0 (8±4 mmHg). • 5 if the current setting is 50% of the selected pressure. The On and Standby LEDs will be lit. 4. Press the Soft D or Firm E buttons to toggle between the two settings. 5. Press the Power button A to save the setting. The control unit will exit this adjustment mode if no button is pressed for 30 seconds. 20 1148137-H