Mindray A8 - Page 280

7-56
Failure
Description
Cause Confirmation
Confirmation
Result
Solution
or HFNC module (refer to
11.1.4).
Failure to adjust
the total flow or
O2 concentration
of the auxiliary
O2/air or HFNC
module
Check whether the gas
supply is connected properly
(O2 supply is required for
the HFNC module), and is
sufficient.
The O2 supply
pressure is less than
280 kPa (40 psi).
Connect or replace the gas
supply.
Check whether the internal
airway is connected
properly. (Remove the
auxiliary outlet by referring
to 8.1.2.)
The internal
pipeline falls off or
leaks, with gas
leaking sound.
Reconnect or replace the
pipeline.
Reconnect the encoder cable
by referring to 8.54 (remove
the instrument panel by
referring to 8.1.5).
The parameters can
be adjusted after
the reconnection.
/
Exchange the total flow
encoder and O2
concentration encoder to
check whether the total flow
encoder malfunctions (refer
to 8.54).
After the exchange,
the original
abnormal
parameters can be
adjusted, but the
original normal
parameters cannot
be adjusted.
Replace the flow encoder
(refer to 11.1.5).
The original
abnormal
parameters still
cannot be adjusted
after the exchange.
Replace the auxiliary O2/air
or HFNC module (refer to
11.1.4).
Auto O2
concentration or
flow change of
the auxiliary
O2/air or HFNC
module, with
adjustment
failure
Check whether the two gas
supplies are connected
properly and are sufficient.
The O2 or air
supply pressure is
below 280 kPa (40
psi).
Connect or replace the gas
supply.
Both gas supplies
are insufficient.
(1) Reconnect the internal
pipeline.
(2) If the problem persists,
replace the auxiliary O2/air
or HFNC module (refer to
11.1.4).
No gas output of
the auxiliary
O2/air or HFNC
module
Check whether the gas
supply is sufficient.
The O2 or air
supply pressure is
below 280 kPa (40
psi).
Connect or replace the gas
supply.
The gas supply is
sufficient.
(1) Reconnect the internal
pipeline.
(2) If the problem persists,
replace the auxiliary O2/air
or HFNC module (refer to
11.1.4).