Service manual

72 Infant Flow
®
SiPAP
675-120 Revision D May 2005
Removal and Fitting of PA Solenoid Valve
The PA Solenoid Valve is replaced by replacing the Valve/Sensor PCB
Removal
1 Remove the case.
2 Remove the Valve/Sensor PCB.
Fitting
1 Install the new Valve/Sensor PCB.
2 Carry out an Oxygen Leak check (see Appendix A - Oxygen Leak Test) and
functional check of the IFSD and calibrate the fuel cell.
Firmware Reload/Upgrade
The firmware reload/upgrade uses a Software Download Utility (P/N 675-821) and a
download cable (P/N 675-819). Please contact Technical Support for Security
Password. To reload/upgrade the firmware:
1 Remove the case from the IFSD.
2 Connect the Download Cable to the COM port on the PC (running Windows 95
or later) and to the pin strip plug PL4 on the Main Processor PCB. Cable should
only be connected/disconnected with unit turned OFF.
3 Switch on the PC and insert the CD into the disk drive on the PC.
4 Run the download program (Downloader.exe).
5 Select the Serial Port and Baud rate as appropriate.
Note
Auto baud rate may fail for 115200 bps on some PC’s. If this happens, manually
select 57600 bps.
6 If necessary, edit the path and file name of the hardware BSL file name and
Firmware file name. Make sure that the BSL file name matches.
7 Enter the serial number for the target unit (in the range 1 to 65535).
8 Switch on the IFSD. Switch to Diagnostics Mode.
Note
The audible alarm sounds continuously.
9 Click on the Check File button and check that the firmware file checksum and
image checksum are the same.