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...

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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...

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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.