Mindray WATO EX-55Pro, Service Manual

Page: 259 / 474

8-5
Message
Alarm
Priority
Cause Solution
calibration.
4. Replace the VCM board and perform
calibration.
Calibrate Flow
Sensor and Insp
Valve
Low
1. The calibration table is not
found in the EEPROM.
2. The checksum of
Calibration table does not
match.
Perform maintenance calibration. Refer
to chapters related to the flow sensor
calibration.
Calibrate
Pressure Sensor
and PEEP Valve
Low
1. The calibration table is not
found in the EEPROM.
2. The checksum of
Calibration table does not
match..
Perform maintenance calibration. Refer
to chapters related to the pressure
sensor calibration.
Calibrate O2
Sensor
Low
1. The calibration table is not
found in the EEPROM.
2. The checksum of
Calibration table does not
match.
3. The AD difference between
the 100% and 21% O2
concentrations in the O2
sensor table is smaller than
79AD.
1. Calibrate the O2 sensor.
2. If the problem persists, replace the
O2 sensor.
Ventilator
Initialization
Error
Ventilator
Initialization:
Time out
High
After the machine is powered
on, the CPU board cannot send
the control parameter settings
to the VCM board.
1. Restart the anaesthesia machine.
2. Reconnect or replace the
communication line between the CPU
board and the VCM board.
3. If the problem persists, replace the
VCM board.
4. If the problem persists, replace the
CPU board.
Drive Gas
Pressure Low
High The drive gas pressure is low.
1. Check whether the gas supply is
normal.
2. Short circuit the pressure switch.
The alarm should disappear. If the
alarm does not disappear, the pressure
switch fails. Replace the pressure
switch. If the pressure switch does not
fail, check the connection between the
pressure switch and the VCM board.
3. If both of the preceding items are