Mindray A8 - Page 240

7-16
Message
Priority
Cause
Solution
O2 Branch Flow
Not Achieved
Low
The O2 flow exceeds
the target flow by 10%
or 0.2 L/min, whichever
is larger.
1. Check whether O2 is supplied
normally. The gas supply pressure on
the O2 pipeline should be within the
range of 280- 600kPa (40-87PSI),
and the cylinder pressure should be
within the range of 6.9-20.0MPa
(1000-2900PSI).
2. Check whether the sensor or valve
is faulty by referring to 7.6.5.1.
3. If the sensor is faulty, replace the
flow sensor (refer to 11.3.1).
4. If the valve is faulty, replace the
electronic flowmeter (refer to
11.1.14).
Balance Gas
Branch Flow Not
Achieved
Low
The balance gas flow
exceeds the target flow
by 20% or 0.4 L/min,
whichever is larger.
1. Check whether the balance gas is
supplied normally. The gas supply
pressure on the AIR pipeline should
be within the range of 280- 600kPa
(40-87PSI), and the cylinder pressure
should be within the range of
6.9-20.0MPa (1000-2900PSI). The
gas supply pressure on the AIR
pipeline should be within the range of
280- 600kPa (40-87PSI), and the
cylinder pressure should be within the
range of 4.2-6.0MPa(600-870PSI).
2. Check whether the sensor or valve
is faulty by referring to 7.6.5.1.
3. If the sensor is faulty, replace the
flow sensor (refer to 11.3.1).
4. If the valve is faulty, replace the
electronic flowmeter (refer to
11.1.14).
Flowmeter Comm
Stop
Med
The CPU board fails to
communicate with the
electronic flowmeter
board for 10s, or
the EFCS CPU fails to
communicate with the
EFCS-PM or VCM for
10s.
1. Restart the machine.
2. If the status screen has a
communication stop alarm, or
encounters the black or blank screen
error, rectify the fault of the status
screen first (refer to 7.2.1).
3. If the problem persists, open the
service door (refer to 8.1.1), and
reconnect the cable between the
backplane and the flowmeter
assembly. (For the cable position,
refer to 8.12.)
4. If the problem persists, replace the
electronic flowmeter board (refer to
8.11).
Total Flow Sensor
Self Test Time Out
Total Flow Sensor
Self Test Time Out
Med
The EFCS CPU and
EFCS-PM fail to
communicate with the
EFCS for 10s.
1. Restart the machine.
2. If the problem persists, reconnect
the cable of the flow sensor (refer to
8.13).