Datex-Ohmeda Anesthesia Delivery Unit S/5 Technical Reference Manual page 298

Troubleshooting A-FGC1
% of Which valves What is being
agent are operated tested
delivery
test
10-19 O Test valve is Checks that the
2
open. scavenger valve is
opened and
verifies that the
Scavenging valve
Inlet valve is not
is opened
leaking.
partially during
the test.
B-72
Description of test
Measures the counter pressure and by-pass flow. After
opening up the scavenging valve, the unit checks that the
Cassette pressure is at least 30mmHg lower than the counter
pressure and that the by-pass flow has not decreased by more
than 100 ml/min. If scavenging valve fails will 14% be stored in
the system check error history. If the inlet valve test fails will
17% be stored in the system check error history.
Technical suggested actions
If failed at 14%
Check cassette pressure sensor
calibration on the A-FGC1 diagnostic page
by verifying that cassette pressure minus
install pressure = equal to counter
pressure (+30mmHg). If not equal
calibrate Cassette pressure sensor, Agent
flow and repeat the test
Scavenging valve does not open. Check
valve in the A-FGC1 diagnostic page.
Replace scavenging valve.
If failed at 17%
Indicates that the Inflow close valve leaks,
Replace inflow close valve.
Document No. 8502854