QD-ENG-68 Rev0 7/12/16
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OPERATING THE CONTROLLER
1. When connected to power the temperature controller’s version number (1.20 or later) will be shown on the LCD display
for two seconds.
2. Next, the system will now test the temperature sensors. There are two temperature sensors in Ice Qube TMS: The
temperature sensor A is located in the internal return air section and measures the enclosure air temperature; and
temperature sensor B
.
Sensor B is not used for this application. If sensor A is abnormal, the controller will display
+
+
+‘---’; if sensor B is abnormal, it shows
+
+
+‘---’ and the audible alarm will also be activated.
3. If temperature sensors pass the test, fan testing will follow. The fans in the Ice Qube TMS are numbered as follows:
1: Internal Fan 1
3: External Fan 1
NOTE: Depending on the product model, the number of operating internal and external fans may vary. Detection
only works for the operating fans for each specific model.
If the fan speed is abnormal, the controller will display
and
and the audible alarm will be activated.
NOTE: If the fans do not pass the test, the detection will stop with an alarm. Press any button to exit self-detection.
The initial test procedure will take less than 60 seconds and varies based on the number of fans in the unit. After the initial
test procedure, the TMS will start its normal operation. The internal circulation fan(s) will start to operate. This fan will run
continuously so that the controller can monitor the enclosure’s internal temperature. The enclosure temperature will be
displayed on the face of the controller. When the temperature inside the enclosure is higher than the factory setting 80°F
(27°C),
will be displayed. This signifies that the cooling system has begun operation to remove heat and from the
enclosure. The system may take 20 to 30 minutes before it reaches full capacity.
If the heat load within the enclosure is less than the cooling capacity of the cooling system, the temperature on the digital
display will begin to decrease. When the temperature inside the enclosure decreases 7 degrees Fahrenheit below the
“Cooling on” set point, the outside fan(s) will cycle off. The cool air fan(s) will continue to operate at low speed, circulating
air within the enclosure. The controller has a factory programmed 7 degrees Fahrenheit (4 degrees Celsius) cooling
differential. Example: “Cooling on” @ 80°F (27°C); “Cooling off” @ 73°F (23°C).
The cooling capacity of the Ice Qube TMS can be adjusted through the fan speed. The external fan speed is at its lowest
when the temperature inside the enclosure is equal to the Cool-on set point (80°F per factory settings) and reaches its
maximum when the temperature inside the enclosure reaches the factory setting of 98°F. The system reaches its largest
cooling capacity when fan(s) operate at their highest speed. Refer to "Programming the Controller". When the temperature
inside the enclosure is in the 80°F (27°C) to 98°F (37°C) range, the external fan speed will be in a linear relationship with
the enclosure temperature.
The internal circulating fan speed also changes with the enclosure temperature. The fan will be at its full speed when the
cooling starts or heating starts. When cooling or heating is not required, the internal fan will operate at low speed. The
controller monitors the fan speeds and if anything abnormal is observed regarding the fan speeds, two icons
and
will appear on the controller display.
The Ice Qube TMS also offers a heating feature. If the enclosure temperature is below the factory heating set point of 50ºF
(10°C), the heat status icon
will be shown on the controller display. This indicates the heat circuit has been energized
and is providing heat to the enclosure. When the temperature of the enclosure rises 7 degrees Fahrenheit (4 degrees
Celsius) above the set point, the controller will cycle the heater circuit off.
NOTE: Review the cooling and heating set points to assure both cooing and heating modes will not be
active simultaneously. A minimum of 8 deg. F is required between the cooling start temperature and the
heating start temperature.
