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34
Basic Function Test
The outlet should match the voltage, frequency and capacity listed on the MCH nameplate.
3. Turn on the mains power switch. Ensure that the unit runs through a successful system test.
4. Ensure that the cabinet fan located under the system is operational.
5. Check the attached hoses to be sure there are no kinks, closed valves, etc. that would block
water flow through the hose loop.
6. Touch the "Prime" button. The pump should turn on and the valve should switch from cool to
recirculation mode approximately every ten seconds (check for ten-second bursts of water
flow in the ice tank).
7. After priming, ensure the water level in the ice tank does not drop below 4 inches.
Temperature Control System Test
1. From the STANDBY screen, set the temperature at 0°C, touch the "Run" button, and ensure
the system enters cooling mode (water flows into ice tank, temperature control status reads
"COOLING"). Note that the output temperature will only decrease to the nominal water
temperature in the tank.
2. Set the temp at 42°C and ensure the system enters heating mode (no water flow in ice tank,
temperature control status reads "HEATING").
3. Set the system to various temperatures throughout the scale and allow time for stabilization.
Check each setpoint temperature, at the water output, with a reliable temperature standard, to
ensure that the temperature displayed is within ± 0.5°C of the actual output water
temperature. Note that ice must be added to the cold water tank in order to achieve setpoints
below nominal water temperature.
Alarm Tests
1. From the RUN screen, set the temperature at 42°C. Once the temperature has stabilized at
42°C, check the actual output water temperature with a reliable temperature standard, to
ensure that the temperature does not exceed 42°C (±0.5°C). Add hot water (not more than
60°C) to the cold water tank. Adjust the temp setting to 30°C to cause the system to pull from
the cold water tank. Carefully monitor the system and ensure that the Overtemp Alarm
activates at 42.5°C (±0.5°C). The OVERTEMP screen should appear, an audible alarm should
sound, and the pump should stop.
CardioQuip Modular Cooler-Heater Operator/Service Manual
1. MCH-1000(i): Move the internal recirculation
valve to the INTERNAL position and add
approximately three gallons (12 liters) of water
to the ice tank.
MCH-1000(m): Connect a loopback hose to the main hose
connectors, and add approximately one gallon (4 liters) of water to the
ice tank.
2. With the front panel mains power switch in the OFF position, plug
the power connector into a dedicated "hospital grade" power outlet.
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