Fresh Gas Display Pcb - Dräger Medical Fabius Tiro Technical & Service Manual

Replacement Procedure
21 Fresh Gas Display
PCB
Dräger Medical AG & Co. KGaA
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Access to the fresh gas display PCB requires removal of the
Bezel Assembly. Figure 27
details. For clarity, other sub-assemblies are not shown in the illustration.
NOTE
If the Core Unit is wall mounted, refer to the
Procedure prior to performing the following step.
1. Disconnect all pipeline hoses and set the System Power switch to 'ON'.
2. Close all cylinder valves except the O2 valve.
3. Set the oxygen flow to 5 l/min.
4. Open the other gas flow control valves to deplete the pressure from the
system.
5. Close the O2 cylinder valve and close the flow control valves. Press the
O2 Flush valve to deplete oxygen pressure from the system.
6. Set the System Power switch to 'OFF' and disconnect AC power from the
machine.
7. Detach the cylinder supply from the yoke.
8. Loosen the screws securing the bezel assembly (refer to the
Bezel Assembly instructions) and bring the assembly forward.
9. Remove the two screws securing the flow sensor sub-assembly to the
bezel assembly, and move the sub-assembly aside for access to the
fresh gas display PCB. (Refer to the
Assembly instructions.)
10. Disconnect the cables from the fresh gas display PCB where shown in
Figure 27.
11. Remove the PCB mounting screws and lock washers, and remove the
PCB.
12. Install the replacement fresh gas PCB, with the insulator in place using
the hardware that was previously removed.
13. Reconnect the cables to the PCB.
14. Reinstall the flow sensor sub-assembly.
15. Reinstall the flow meter bezel assembly in the machine (refer to the
Meter Bezel Assembly
16. Reconnect the pipeline and cylinder supplies and restore power to the
machine.
17. Perform the PMS procedure.
6020.002
shows the cable connections and PCB mounting
Wall Mount Service Access
Fresh Gas Flow Sensors and Filter
instructions).
Revision B Released
Fabius Tiro
Flow Meter
Flow Meter
Flow
197