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CardioQuip Modular Cooler-Heater Operator/Service Manual
System Test
On startup, the MCH enters TESTING mode and runs a system test to verify proper operation of
all internal components. Onscreen indicator lamps display the status of control and feedback
signals for the various internal systems, and the "Test Status" column (far right) displays the test
results. If any test fails, its "Test Status" will display a red "X" symbol and the FAILURE screen
will appear (see the System Failure section). Touching the "Retry" button will retry the system
test. The MCH will not enter operational mode if any internal system test fails.
System mode indicator
Audible alarm indicator
Temperature differential
Operational indicators
Control buttons
Once the system test has successfully completed, the operator must press the "Standby" control
button to enter Standby mode.
CAUTION: At the end of a system test, the audible alarm will sound once. The
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operator must verify that the alarm is audible within the operating environment.
This symbol is the Temperature Differential indicator. When displayed onscreen,
it indicates that the measured temperature differential between the MCH's two
internal temperature controllers is greater than 2.5˚C. This is usually caused by
blocked or impeded water flow. Check the water path to be sure connectors are
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fully seated, hoses are not kinked, valves are fully open, and the internal
recirculation valve (if so equipped) is fully in either the NORMAL or
INTERNAL position. If the MCH runs in this condition for more than ten
seconds, it will automatically cease operation and display a FAILURE screen.
indicator
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Retry button
Test status indicators
Indicator lamps
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