A5/A3â„¢ Service Manual 046-001141-00 3 - 17
Periodic Maintenance Functional Tests
3.8.3 Gas Module Verification
1. Remove and re-insert the AG Module into the module rack.
2. Touch the screen to start the manual ventilation mode and make sure that the gas test screen
and CO2 waveform and parameter area are displayed on the screen and that the prompt
message External AG Loaded Successfully is displayed at the top of the screen.
3. After the AG module is inserted, remove the watertrap, make sure that the alarm AG No
Watertrap is available. After the watertrap is connected to the module, make sure that the
alarm disappears.
4. Wait until the AG module warmup is finished and then use your hand or other objects to
completely block the gas inlet of the AG module. An alarm message AG Airway Occluded will
appear on the screen.
5. Block the gas inlet for another 30 s. If the alarm message does not disappear, it indicates that the
module does not leak.
3.8.4 Gas Delivery System Tests
3.8.4.1 O2 Flush Verification
1. Using a breathing hose, connect the bag arm to the expiratory port.
2. Put the Manual/Auto lever to the manual position and set the APL valve to 75.
3. Connect a flow meter to the inspiratory port.
4. Verify that the O2 flush flow is between 35 to 50 L/min when pressing the O2 flush valve.
3.8.4.2 O2:N2O Ratio System
1. Set the O2 and N2O Flow Control Valves to minimum.
2. Turn on the N2O flow control and adjust N2O flow to maximum.
3. Adjust O2 flows according to the following table.
4. Verify that the corresponding N2O flows are according to the following table.
5. Lower the N2O flow to minimum.
6. Lower the O2 flow to minimum.
O2 Flow Setting N2O Flow
0 L/min 0 L/min
0.3 L/min ≤ 1.0 L/min
0.8 L/min between 2.0 L/min and 2.5 L/min
1.0 L/min between 2.5 L/min and 3.2 L/min
2.0 L/min between 4.9 L/min and 6.3L/min
3.0 L/min between 7.4 L/min and 9.5 L/min
4.0 L/min ≤ 12.7 L/min
5.0 L/min ≤ 15.8 L/min
6.0 L/min ≤ 19.0 L/min
0 L/min 0 L/min
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