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Troubleshooting A-FGC1
N
O delivery test
2
Perce
Which valves are operated
ntage
of
test
0 - 10
O
test valve is opened. The N
2
proportional valve is energized. The
N
O needle valve has to be manually
2
opened to over 6 l/min.
11 - 40
The 02 test valve and the N
needle valve remain open. The N
proportional valve is closed.
41-50
The 02 test valve and the N
needle valve remain open. The N
proportional valve is reopened.
51-
The 02 test valve, the N
O
2
100
proportional valve and the N
needle valve remain open. The N
Air selection solenoid is placed in
the Air position.
B-70
What is being
tested
O
The N
O needle valve
2
2
and the N
O
2
proportional valve.
O
This test verifies that
2
O
the N
O proportional
2
2
valve can shut off the
flow of N
O.
2
O
This test verifies that
2
O
the N
O proportional
2
2
valve has reopened.
This test verifies that
O
selecting Air can shut
2
O/
off the N
O flow.
2
2
How test is done
Looks for a flow of greater than 6 l/min.
through the sidegas flow transducer. If it can
not deliver enough flow, it remains in this
test.
The sidegas flow transducer should indicate
a flow less than 60ml/min. If the test fails,
35% is stored in the system check error
history.
The sidegas flow transducer should indicate
a flow of at least 5 l/min. If the test fails,
48% is stored in the system check error
history.
The microprocessor in the Fresh Gas Control
unit de-energizes the N
O selection valve.
2
Looks for a flow through the sidegas
transducer. If there is still a flow, this
indicates that there is N
O flowing and it
2
has not switched to Air.
Suggested actions if test fails
Check O
and N
O pipeline pressure is
2
2
within specification.
O
test valve faulty.
2
Check flows with a Test device.
Check flows and N
O proportional valve
2
on diagnostic page.
2. Calibrate the A-FGC1.
Check the O
and side gas flows with a
2
Test device.
Calibrate the A-FGC1.
1 Check voltage to the N
O/Air solenoid
2
valve.
2. Replace the N
O/Air selection valve.
2
Document No. 8502854
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Table of Contents
Troubleshooting
