Stryker PneumoSure, Service Manual, Page: 45 / 76

Replacing Components and Modules
43
EN
6.3 Uninstalling/Installing Low Pressure Unit LPU
In case of malfunction of the pressure regulator and/or unacceptable flow reduc-
tion, the pneumatic unit LPU must be replaced.
DANGER!
Disconnect device from power supply.
1. Open the device as described in chapter 3.6 Opening the Device .
2. Remove the ST1 plug /cable
(2)
from the PCU board
(3)
by pulling up.
3. Remove the ST3 plug /cable
(4)
and ST5/cable
(5)
from the PCU board by
pulling towards side.
4. Remove the high pressure tube as depicted by item
(7)
and the low pressure
tube as depicted by item
(9)
(see also Fig. 4-5 High pressure unit HPU).
5. Use a SW 4 socket wrench to remove the four fastening nuts
(6)
and lift out
the entire unit by pulling straight up.
6. Follow these steps in reverse for assembly.
The following tests/updates must be performed after installing a new low pres-
sure unit LPU:
• Software update via Global Services.net
• Testing the Low Pressure Unit LPU for Leaks
• Basic function test
• Safety test (see chapter 4.1 Safety Test)
Fig. 6-6 Position of low pressure unit
LPU
(1)
Low pressure unit (LPU)
(2)
ST1 plug/flat ribbon cable
(3)
PCU board
(4)
Plug ST3/cable leading to high
pressure sensor
(5)
Plug ST5/cable leading to heater
(6)
4 x fastening nuts M4/toothed
washer
(7)
High pressure tube HPT connec-
tion
(8)
High pressure tube HPT
(9)
Low pressure tube LPT connection
(1)
(2)
(5) (3) (4)
(6)
(9) (6) (8) (7)