Mindray WATO EX-55Pro, Service Manual

Page: 345 / 474

8-91
Failure
Description
Possible Cause Judgment Method Recommended
Action
The alarm
Heating
Module Failure
is generated at
startup and the
circuit does not
heat.
The heater is in
poor condition. Measure the resistances of pins 1 and
2 and pins 3 and 4 of the connector
that connects to the thermistor under
the workbench by using a multimeter.
If the difference between the
measured resistances exceeds 300
ohms, the heater is faulty. Replace the
heater.
The power board
is in poor
condition. If the difference between the
measured resistances is small, the
power board is faulty. Replace the
power board.
During the
switching of
the
bag/mechanical
ventilation
switch, the
ventilation
mode
displayed in
the upper left
of the screen
does not
change. The material of
the
bag/mechanical
ventilation switch
is in poor
condition. Power off the anaesthesia machine,
open the cover plate of the
workbench, test pins 1 and 2 of the
interconnection terminal of the
bag/mechanical ventilation switch by
using the conduction position of the
multimeter, and turn the
bag/mechanical ventilation switch. If
the conduction of pins 1 and 2 does
not change, the material of the
bag/mechanical ventilation switch is
in poor condition. If the conduction
changes, proceed with the analysis. Replace the
bag/mechanical
ventilation
switch.
The cable is not
connected
properly. Power on the anaesthesia machine,
test the voltage of pins J8-12 of the
VCM by using the multimeter. The
voltage should be 0-0.4 V in bag
ventilation mode and be 3.0-3.6 V in
mechanical ventilation mode. If the
measurement value is beyond the
normal range, the cable is not
connected properly. If the
measurement value is within the
normal range, proceed with the
analysis. Replace the cable
of the VCM.
The VCM is in
poor condition. If the fault cannot be identified by
using the preceding two methods, the
VCM is abnormal. Replace the
VCM.
The
anaesthesia
machine The cable is not
connected
properly. Check whether the two connectors of
the display data cable are connected
properly. If so, proceed with the Connect the cable
properly.