Stryker PneumoSure, Service Manual, Page: 44 / 76

42
EN
Replacing Components and Modules
If these functional elements malfunction and/or the cause of the detected flow
restriction has been determined, the component has to be replaced.
1. Open case as described under 3.6 Opening the Device .
2. Remove gas supply connection as described in chapter 6.1 Uninstalling/In-
stalling Gas Supply Connection .
3. Remove the gas tube from the HPU
(1)
and pull off plugs ST3 + ST5 from PCU
board (see also Fig. 6-6 Position of low pressure unit LPU).
4. Unscrew the four fastening screws from the rear panel (see Fig. 6-1 Position
of gas supply connection) and remove the HPU.
5. Follow these steps in reverse for assembly.
Perform the following tests/calibrations after installing a new HPU high pressure
unit:
• Testing the HPU for leaks (see 4.6.4 Checking High Pressure Unit HPU for Leaks)
• Offset calibration (see chapter 5.4 Offset Calibration)
• HIGH-pressure calibration (see chapter 5.6 HIGH Pressure Calibration)
6.2.1 Replacing the Heater/Temperature Sensor
To replace the heater/temperature sensor
(5)
, the high pressure unit HPU must
be removed. Heater and temperature sensor are combined in one component.
Remember the exact use and position of the associated insulating bush and in-
sulating disk when replacing these components. The associated SMD fuse is lo-
cated on the PU board and can be replaced there (see Fig. 4-8 Position of SMD
fuse).
Fig. 6-5 High pressure unit HPU (side
view)
(4)
High pressure safety valve
(5)
Heater/temperature sensor
(6)
Fastening screw/insulating bush
(7)
Insulating disk, silicone
(8)
High pressure regulator setting
screw
(9)
Adapter 01 for HPU (metal block)
(9)
(7)
(5)
(6)
(8)
(3)
(4)