GE Aestiva 5 Service Manual

							1006-0939-0004-1
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TO PREVENT FIRES:
•Use lubricants approved for anesthesia or O
2 equipment, such as Krytox®1.
•Do not use lubricants that contain oil or grease. They burn or explode 
in high O
2 concentrations.
•All covers used on the system must be made from antistatic (conductive) 
materials. Static electricity can cause fires.
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Obey infection control and safety procedures. Used equipment may 
contain blood and body fluids.
In this sectionRepair policy  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Manifold maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Expiratory valve maintenance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Receiver maintenance (active gas scavenging only)  . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Flow sensor maintenance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Breathing circuit maintenance   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Bellows maintenance  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Bellows tests  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
O
2 sensor calibration - 21% O2  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
O
2 sensor calibration - 100% O2  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Flow sensor calibration   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
How to prevent water build-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25
1.® Krytox is a registered trademark of Dupont de Nemours E.I. & Company Inc
4 User Maintenance 
						

							Aestiva
4-21006-0939-000
4-2
Repair policy
Do not use malfunctioning equipment. Make all necessary repairs or have the 
equipment serviced by an authorized Datex-Ohmeda service representative. After repair, 
test the equipment to ensure that it is functioning properly, in accordance with the 
manufacturer’s published specifications.
To ensure full reliability, have all repairs and service done by an authorized Datex-
Ohmeda service representative. If this cannot be done, replacement and maintenance 
of those parts listed in this manual may be undertaken by a competent, trained 
individual having experience in the repair of devices of this nature.
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No repair should ever be attempted by anyone not having experience in the 
repair of devices of this nature.
Replace damaged parts with components manufactured or sold by Datex-Ohmeda. 
Then test the unit to ascertain that it complies with the manufacturer’s published 
specifications.
Contact the Datex-Ohmeda Customer Service Center for service assistance. In all cases, 
other than where Datex-Ohmeda’s warranty is applicable, repairs will be made at Datex-
Ohmeda’s current list price for the replacement part(s) plus a reasonable labor charge. 
						

							4 User Maintenance
1006-0939-0004-34-3
Manifold maintenance
Step 1
Complete the basic 
disassembly (Refer to the 
Cleaning and Sterilization 
section).
Step 2 
(APL valve)
1
Remove the diaphragm. 
Replace it if:
•The disk, cage, or 
diaphragm is damaged.
•The diaphragm looks 
worn.
•The diaphragm fits over 
the rim.
Step 3
(Seals)
Loosen the thumbscrew and 
remove the plate.
• Replace the seal if 
damaged or worn.
AB.23.094
AB.23.069
AB.23.070 
						

							Aestiva
4-41006-0939-000
4-4
Step 4
(Seals con.)
Loosen the thumbscrews.
Step 5
(Seals con.)
Open the manifold (top 
middle, and bottom parts).
Step 6
(Seals con.)
Replace the parts if they are 
damaged or worn.
AB.23.073
AB.23.074
Side
TopBottom
AB.23.071 
						

							4 User Maintenance
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Step 7
(Bag/Vent)2
Replace the parts if they are 
damaged or worn.
Step 8
Put the parts together 
•Make sure all gaskets are 
fully seated.
•Fully tighten the 
thumbscrews.
1.When you turn the APL knob, you change the pressure that is necessary to push the disk up and permit gas 
to exit.
2. The Bag/Vent switch pushed down plungers to close the other path. In the Bag position, the vent path is 
closed, etc.
Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.
AB.23.077
AB.23.075 
						

							Aestiva
4-61006-0939-000
4-6
Expiratory valve maintenance
Disassemble the manifold and examine the seals at 12 autoclave cycles. 
These conditions indicate a possible leak in the exhalation valve:
•A decrease in airway pressure during the inspiratory pause in the volume control 
mode of ventilation.
•Alarms for low tidal volume.
•The ventilator circuit has a leak, but the bellows pass the bellows tests in this 
section.
Step 1
Remove the exhalation valve 
(Cleaning and Sterilization 
section).
Step 2
Remove the top cover.
AB.23.089
AB.23.093 
						

							4 User Maintenance
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Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.
Step 3
Unscrew the lock ring (one 
quarter turn) and remove the 
cap.
Step 4
Put the parts together 
•Align the dimples in the 
cap with the valve seat.
•To install the top, align it 
with the base and push 
down.
AB.23.072
Dimples
AB.23.021 
						

							Aestiva
4-81006-0939-000
4-8
Receiver maintenance (active gas scavenging only)
A blocked filter decreases flow through the scavenging system. In extreme cases this can 
open the high-pressure relief valve and vent to room air.
Note: Passive gas scavenging does not require maintenance.
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This system operates correctly at the electrical interference levels of IEC 
601-1-2. Higher levels can cause nuisance alarms that may stop 
mechanical ventilation.
•Always make sure that the rear cover is installed.
•Completely tighten the thumbscrew.
Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.
Step 1
Remove the receiver:
•Loosen the thumbscrew.
•Remove the rear cover. 
•Pull out and up on the 
receiver.
Step 2
Replace the filter (friction fit 
with gasket).
AB.23.091
AB.23.092
Filter 
						

							4 User Maintenance
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Flow sensor maintenance
Before you use the system, complete the preoperative test procedure. Refer to 
"Appendix - Preoperative Tests" section of Part 1 of the Operation Manual.
Step 1
Remove the flow sensor 
module (Cleaning and 
Sterilization section).
Push in the tab and remove 
the cover.
Step 2
Install the new sensor with 
the arrows up. 
Keep the tubes straight.
Step 3
Slide on the cover. Do not 
pinch the tubes.
AA.96p.037
AA.96p.039 AA.96p.038 
						

							Aestiva
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4-10
Breathing circuit maintenance
Disassemble the patient circuit module to replace check valves or seals. 
Step 1
Remove the patient circuit 
module (Cleaning and 
Sterilization section).
Step 2
Hold in the tab.
Step 3
Remove the rear cover.
Note: The rear seal is keyed 
to fit a specific module.
AA.96p.017
AA.96p.041
AA.96p.042