Hill-Rom Advanta P1600, Service Manual

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ZoneAire® Sleep Surface Software Theory of Operation
Chapter 3: Theory of Operation
Advanta™ Bed Service Manual (man168ra) Page 3 - 37
3
Upon reset, the following sequence occurs:
• The operating mode is read from the Neuron’s internal EEPROM. This is
the state the air system was in before the reset occurred.
• Relay is turned on. This supplies power to the pressure sensing circuit
located in the mattress. It also supplies 24V AC power to the manifold
valve assembly drive circuitry.
• Messages are sent to the footboard control panel to light the appropriate
LEDs.
• Any errors present are cleared.
• The sensor calibration constants are read from the EEPROM located on the
pressure sensor circuit. These constants are stored in multiple locations. If
the constants in these multiple locations are not consistent, an error is set.
• The present pressure is read and stored for reference for use in the comfort
mode.
• Normal operating sequence is initiated in the appropriate mode.
ZoneAire® Sleep Surface Operating Modes
The air system operates in one of the following possible modes:
• Off
• Pressure management (pressure relief)
• Heel management 1 (heel relief 1)
• Heel management 2 (heel relief 2)
• Heel management 3 (heel relief 3)
• Auto firm
• CPR