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

Page: 299 / 494

Troubleshooting A-FGC1
Document No. 8502854
B-73
20-29 The O
2
Test valve
is opened.
Scavenging valve
is closed and the
inlet valve is
opened.
Checks that the
scavenger valve
closes and that the
inlet valve is
opened.
For all agents except Desflurane, Is the counter pressure and
the cassette pressure compared, they should be within
30mmHg of each other.
The test for Desflurane is more rough and checks if the
difference between the cassette pressure and calculated vapor
pressure is larger than 500mmHg.
If the test fails will 28% be stored in the system check error
history.
If failed at 28%
ALADIN cassette leaks or the connection
between A-FGC1 and cassette. Verify on A-
FGC1 diagnostic page.
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
Recalibrate Cassette pressure sensor
board.
Scavenging valve leaks; replace valve.
30-39 The inlet valve
and the O
2
test
valve remain
open.
Checks for a leak
in the cassette.
If the bypass flow is 4% less than the previous test (10-14%)
indicates this a leak in the cassette. Repeats the previous
cassette pressure test (20-29%). If the leak test fails will 33%
be stored in the system check error history. If the pressure test
fails will 35% be stored in the system check error history.
If failed at 33%
Leakage in cassette or connection
between cassette and A-FGC1.
If failed at 35%
See suggestion at 28% 1-3
% of
agent
delivery
test
Which valves
are operated
What is being
tested
Description of test Technical suggested actions