GE Aestiva 5 Service Manual

							4 User Maintenance
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Do the steps in the opposite order to assemble the module.
Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.
Step 4
Push in the tabs and remove 
the top cover.
Step 5
Remove the seals.
Turn and pull to remove the 
check valves.
AA.96p.043
AA.96p.044 AA.96p.045 
						

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Bellows maintenance
Step 1
Remove the bellows from the 
breathing system.
Step 2
Turn the housing 
counter-clockwise and lift.
Step 3
Remove the bottom edge of 
the bellows from the rim. 
AA.96p.023 AA.96p.051
AA.96p.052 
						

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wWW W W
AA A A
RR R R
NN N N
III I
NN N N
GG G G
Do not disassemble the pressure relief valve. This can damage the seat or 
diaphragm and cause injury to the patient.
Step 4
Remove the disk from the 
bellows.
Step 5
Remove the ring from inside 
the top of the bellows.
Step 6
Push the latch toward the 
center and remove the rim.
Step 7
Remove the pressure relief 
assembly. 
AA.96p.031
AA.96p.032
AA.96p.033
AA.96p.034 
						

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Do these steps in the opposite order to assemble the bellows. If you see a dust-like 
powder on the housing or the bellows, apply a thin layer of KRYTOX lubricant to the ribs 
of the bellows housing. Make sure the lubricant is applied smoothly and there are no 
lumps.
Make sure that:
•The arrow on the seal points up.
•You hear a double click when you install the rim.
•The rim is locked in position.
•The inner ring is correctly installed inside the top of the bellows.
•Only the bottom ring of the bellows fits over the rim.
•The housing is locked in position. You cannot lift it off.
Step 8
Push the latch towards the 
center and remove the 
locking tabs.
Step 9
Remove the seal.
AA.96p.035
AA.96p.036 
						

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Bellows tests
wWW W W
AA A A
RR R R
NN N N
III I
NN N N
GG G G
Objects in the breathing system can stop gas flow to the patient. This can 
cause injury or death:
•Do not use a test plug that is small enough to fall into the breathing 
system.
•Make sure that there are no test plugs or other objects caught in the 
breathing system.
wWW W W
AA A A
RR R R
NN N N
III I
NN N N
GG G G
The bellows assembly test does not replace the preoperative tests. Always 
complete the tests in the section Preoperative Tests before you use the 
system with a patient.
This test makes sure that all components are correctly assembled. It is not an alternative 
to a complete system checkout.
If the bellows operates correctly, install it in the system.
If there is a problem, disassemble the bellows. Look for and replace damaged parts.
Step 1
Hold the bellows assembly 
vertical and close the 
 ports (A and B).
A
B 
						

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Step 2
Invert the bellows. They must 
not fall more than 
100 mL/min.
If it does:
•The ports are not tightly 
sealed.
•The bellows is incorrectly 
installed.
•The seal inside the 
bellows is not correctly 
installed (with its groove 
pointed up).
•Parts are damaged.
Step 3
Remove the plugs from the 
ports. Permit the bellows to 
fully extend.
Step 4
Close port C.
AA.96p.124
C 
						

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If the result for all the bellows tests was “passed,” install it in the system.
Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.
Step 5
The bellows must not fall 
more than 100 mL/min.
 If it does:
•The port is not tightly 
sealed.
•The bellows or the 
pressure relief valve is 
not correctly installed.
•Parts are damaged.
  
						

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O2 sensor calibration - 21% O2
Note: The 21% O2 calibration must be done before the 100% O2 calibration. During O2 
calibration the screen replaces O
2 data with - - -. Mechanical ventilation must be off to 
perform calibration.
This procedure takes three minutes or less.
Step 1
Push the menu key.
Step 2
Turn the knob to select 
Setup/Calibration (highlight).
Step 3
Push the knob to show the 
next screen.
AB.29.013
AB29.002 AB.90.036
AB.90.037
AB.90.091 
						

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The screen shows “Calibrating. . .”, followed by the result (“Complete” or “Failure”).
Step 4
Turn, then push the knob to 
select O
2 Sensor Cal.
Step 5
Select 21%. Then, push the 
knob.
Step 6
Complete the steps shown on 
the screen.
• Remove the O
2 sensor from 
the circuit.
•Do not twist or stress the 
cable.
•Make sure the cable is 
connected.
Step 7
Select Start Cal.
Then, push the knob.
AB29.002
AB.29.012AB.90.048
AB.90.049
AB.48.080 
						

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If the calibration fails:
•perform the calibration again.
•do a 100% O
2 sensor calibration. If this passes, repeat the 21% O2 calibration.
If the calibration passes, install the O
2 sensor. If necessary, do the 100% O2 calibration.
Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.