Drager Savina 5.0 Manual

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 1
Repair Procedures
Repair Procedures
The following repair procedures are described:
−Opening the unit
−Power pack
−O2 valve block
−Motor Drive PCB
−Fan
−O2 Diaphragm PCB
−Bypass valve V1
−Expiratory valve V3
−Replacing the EEPROM
−Control PCB
−Pressure measuring unit
−Internal battery

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 2
Repair Procedures Opening the unit
Opening the unit
As required, (see also Figure "Front view with front panel and Control PCB folded away" and
Figure "Rear view of Savina with rear panel removed" in the "Schematics and Diagrams" section)
Savina can be opened at the control unit and/or at the rear panel.
Before opening the unit, observe the following warnings:
For maintenance procedures according to PMS procedure, see Repair Instructions
"Maintenance Procedures".
Hazardous voltage. Touching live components can lead to serious injury or death.
Before opening the unit, unplug the power plug from the socket-outlet and remove
the fuse (Rear view of the unit, fuse/1).

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 3
Repair Procedures Opening the unit
• Carefully pry the fuse (Rear view of the unit, fuse/1) off its holder using a small screwdriver or a
similar tool.
Fig.1 Rear view of the unit, fuse
−Opening the operator control panel
−Removing the rear panel
Electrostatic discharge may damage electrostatic sensitive devices. When
handling electrostatic sensitive devices use a static-dissipative mat and a wrist
strap.

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 4
Repair Procedures Opening the unit
Opening the operator control panel
• Carefully pry the fuse (Rear view of the unit, fuse/1) off its holder using a small screwdriver or a
similar tool.
Fig.2 Rear view of the unit, fuse
Hazardous voltage. Touching live components can lead to serious injury or death.
Before opening the unit, unplug the power plug from the socket-outlet and remove
the fuse (Rear view of the unit, fuse/1).

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 5
Repair Procedures Opening the unit
• Switch off the device.
• Unplug power plug from socket-outlet.
• Disconnect the O2compressed gas supply.
• Slacken the screws (Opening the operator control panel/1).
Fig.3 Opening the operator control panel
• Remove the frame of the operator control.
Electrostatic discharge may damage electrostatic sensitive devices. When
handling electrostatic sensitive devices use a static-dissipative mat and a wrist
strap.

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 6
Repair Procedures Opening the unit
• Remove the screws (Folding away the control unit/1) (one on the left and one on the right side).
Fig.4 Folding away the control unit
• Fold down the operator control panel forwards.

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R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 7
Repair Procedures Opening the unit
If necessary, for example to access the connectors of the power pack, the Control PCB can also be
folded away. Fold away the Control PCB as described in the following.
• Remove the screws (Folding away the Control PCB/1).
Fig.5 Folding away the Control PCB
• Fold away the Control PCB.

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 8
Repair Procedures Opening the unit
Removing the rear panel
• Carefully pry the fuse (Rear view of the unit, fuse/1) off its holder using a small screwdriver or a
similar tool.
Fig.6 Rear view of the unit, fuse
Hazardous voltage. Touching live components can lead to serious injury or death.
Before opening the unit, unplug the power plug from the socket-outlet and remove
the fuse (Rear view of the unit, fuse/1).

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 9
Repair Procedures Opening the unit
• Switch off the device.
• Unplug power plug from socket-outlet.
• Disconnect the O2compressed gas supply.
• Squeeze the filter clamps (Filter cover/1) and remove the filter cover.
Fig.7 Filter cover
Electrostatic discharge may damage electrostatic sensitive devices. When
handling electrostatic sensitive devices use a static-dissipative mat and a wrist
strap.

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 10
Repair Procedures Opening the unit
• Remove the screws (Removing the rear panel/1).
Fig.8 Removing the rear panel
• Remove rear panel.

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Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 11
Repair Procedures Opening the unit
Fig.9 Position of hoses
When mounting the rear panel, make sure the hoses point to the left. Otherwise the
hoses could buckle (which could lead to error message "O2 measurement").

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Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 12
Repair Procedures Power pack
Power pack
General information about the power pack
In case of repair, replace complete power pack.
Identification of the power pack's hardware version
For identification, the power pack needs to be removed from the unit.
Fig.10 Rear view of the unit, power pack pulled out a short way

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Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 13
Repair Procedures Power pack
The following illustrations show the labels of the power pack. The power pack with the Dräger part
number 8413606 (SW version of power pack: "H-L") has been installed in all Savina units
manufactured until approx. March 2003. As of April 2003, the power pack with Dräger part number
8414132 (as of SW version of power pack: "P") will be installed in Savina.
Fig.11 Power pack labels; left-hand illustrations shows SW version L, right-hand illustration
shows SW version P (as of April 2003)
As of Savina software version 2.0 the software version of the power
pack can be read out in DrägerService mode, test step 29.
Dräger part number
SW version of the power
pack

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R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 14
Repair Procedures Power pack
Measuring the supply voltages
The power pack delivers the following supply voltages:
The +48 V are fed directly from the power pack to the Motor Drive PCB. The remaining voltages
are fed to the Control PCB and from there to the other PCBs and component devices.
The voltages can be measured on the Control PCB (except the +48 V). The control unit must be
opened to access the measuring points (see "Opening the operator control panel"). The voltages
are also displayed in DrägerService Mode, "Test Step 4".
+5 V) —15 V) +15 V) +24 V) +48 V)
Voltage Pin assignment, connector X1 Test point
+5 V) 2/4 T43
DGND 1/3 T44
—15 V) 11/12 T41
+15 V) 8/9 T16
AGND 7/10 T39
+24 V) 6 T625
AGND 5 T626

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Repair Procedures Power pack
Fig.12 Detail of the Control PCB, voltage test points
Battery The battery voltage must be measured directly at the battery (see Maintenance
Procedure, chapter "Replacing the internal rechargeable batteries"). It can also be
measured between the battery fuse and the external voltage supply connection
(see also "Repair Information/Error Events", chapter "Starting aid for charging of
internal battery").
Voltage Pin assignment, connector X1 Test point

Observe protection mark DIN 34. Copyright reserved.
R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 16
Repair Procedures Power pack
Replacing the power pack
1. Switch off the device.
2. Unplug the power plug of the device from the socket-outlet.
3. Disconnect the connector of the (optional) external battery from the device.
4. Carefully pry the fuse "F3" (see Fig: Rear view of the unit, fuse "F3")off its holder using a
small screwdriver or a similar tool.
Fig.13 Rear view of the unit, fuse "F3"

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Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 17
Repair Procedures Power pack
5. Squeeze the filter clamps (Rear view of the unit, filter cover/1) and remove the filter cover.
Fig.14 Rear view of the unit, filter cover

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R5664900T04.fm 26.03.03
Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 18
Repair Procedures Power pack
6. Remove the screws (Rear view of the unit; rear panel/1).
Fig.15 Rear view of the unit; rear panel
7. Remove the rear panel and put it aside.

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Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 19
Repair Procedures Power pack
8. Remove the screw (see Fig: Rear view of the unit; power pack).
Fig.16 Rear view of the unit; power pack

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Dräger Medical AG & Co. KGaA Repair Procedures Savina Version 5.0 Page 20
Repair Procedures Power pack
9. Using an Allen key (size 3 mm) loosen the Allen screw (Bottom view of the control unit;
mounting of the front frame/1) on the front frame a few turns (Note: older units have
slotted-head screws!).
Fig.17 Bottom view of the control unit; mounting of the front frame
The screws of the front frame are secured with Loctite.