7-12
the panel of the instrument and the
backplane (backplane socket position: J6
socket on the left).
3. If the problem persists, replace the status
screen control board (refer to 11.1.5).
Aux O2/AIR
Comm Stop
High
The CPU board lost
communication with
the auxiliary O2/air
module for 10s.
1. Restart the auxiliary O2/air module.
2. If the problem persists, remove the
auxiliary electrical outlet (refer to 8.1.2) and
service door (refer to 8.1.1), reconnect the
cable between the auxiliary O2/air module
and the backplane (backplane socket
position: "O2Air" socket on the right).
3. If the problem persists, replace the
auxiliary O2/air module (refer to 11.1.4).
HFNC Module
Comm Stop
High
The CPU board lost
communication with
the HFNC module
for 10s.
1. Restart the HFNC module.
2. If the problem persists, remove the
auxiliary electrical outlet (refer to 8.1.2) and
service door (refer to 8.1.1), reconnect the
cable between the HFNC module and the
backplane (backplane socket position:
"O2Air" socket on the right).
3. If the problem persists, replace the HFNC
module (refer to 11.1.4).
7.3.3 Power Board Runtime Alarms
Power System
Comm Stop
High
The CPU board fails
to communicate with
the power board for
10s.
1. Restart the anesthesia machine.
2. Open the display cable cover (refer to
8.1.7), reconnect the display cable, open the
service door (refer to 8.1.1), and reconnect
the cable between the backplane and display
(J5 socket at the lower left part of the
backplane).
3. If the problem persists, open the service
door (refer to 8.1.1), disconnect the internal
battery cable at the lower left part on the
rear of the cart. Restart the machine 5
minutes after the power board is powered
off.
4. Select Setup > Service > Data
Monitors > Power System and check
whether valid data is available for the A/D
channel. (If data is invalid, "---" is
displayed.) If yes, a software error has
occurred. In this case, upgrade the software
(refer to Chapter 6).
5. If the problem persists, replace the
DC-DC power board (refer to 11.1.11).
6. If the problem persists, replace the cable
between the backplane and display.
7. If the problem persists, replace the CPU