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NOTE
The BiPAP AVAPS and S/T have experienced significant design changes. Philips Respironics began
manufacturing a “2.XX” and “3.XX” version of the devices. These versions are manufactured with
hardware components that are not compatible with the previously-designed version. “2.XX/3.XX”
refers to the firmware version of the device. Devices that are not marked “2.XX/3.XX” require the use of the
previously-designed components (refer to the Repair and Replacement section of this manual for further
clarification.) To differentiate these devices from the previously-designed version, note the “2.XX” or “3.XX”
annotation on the serial number label located on the bottom of the device, as follows:
If the “2.XX” annotation is present on the device’s serial number label, then the following components are
different from the previously-designed version of the device and are not backwards compatible.
• PCA,
• Blower,
• Blower Cap,
• Air Inlet Seal,
• Sound Abatement Foam, and
• Top Cover.
If the “3.XX” annotation is present on the device’s serial number label, then the components listed in the
RP Kit Listing section 6.0 of Repair and Replace Chapter showing (3.XX) follow the “3.XX” format. These
components are not backwards compatible.
RP kits for both the previous design and the “2.XX/3.XX” version of the device will be available as long as
parts are available from Philips Respironics suppliers.
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