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System function introduction
E02A INTEGRATED RACK TYPE AIR CONDITIONER
UM.ICUBE2.0-IRTAC.SG.0822 August 2022 www.eaton.com
4.3 Component control mode
1. Control modern of internal fane:
The inner fan runs in normal speed when system runs normally.
2. Control mode of external fane:
Air circulation mode: the external fan stops.
Cooling mode: The speed of the external fan depends on the temperature of the condenser. The higher the
temperature of the condenser, the faster the speed of the external fan; The lower the temperature of the
condenser, the slower the speed of the external fan.
3. Control mode of compressore:
Air circulation mode: Compressor stops Cooling mode: The speed of the
compressor depends on the temperature difference between the return air temperature and the set value; The
greater the temperature difference, the faster the speed; The smaller the temperature difference, the slower
the speed the compressor speed is; the lower the difference is, the lower the compressor speed is.
4.4 Unit sequencing control (option)
The equipment is connected to functions such as time switching, disturbance switching, high
temperature switching.
4.4.1 Time Switching
The two air conditioners switch operation according to the set time.
4.4.2 Temperature switch
1. When cabinet temp reach the setting point cooling point only one air-conditioner will work. When the
temperature is lower than the cooling stop point, the air-conditioner stops working.
2. When cabinet temperature reaches the setting point of high temperature point, the two-air-conditioners will
work together. When the temperature is lower than (high temperature point-sensivity), one air-conditioner stops
working. Only one air-conditioner will work.
4.4.3 Both working with high temperature
When one air-conditioner is triggered with a high temperature alarm, the other air-conditioner will continue to
work. If high temperature alarm is cleared, one air conditioner will be closed.
4.4.4 Disturbance switching
1. When one air conditioner has a problem, the other will start immediately.
2. If the fault that occurs during the switching time is cleared, do not switch to the other, until the time
switch is completed.
3. If the fault is not cleared, the other will work all the time.
4.5 Self testing
The unit provides the self testing function for on site test and it will automatically goes to self-testing procedure. If
choosing the choosing self-testing function in the system function menu, the procedures are as below:
1. If the compressor doesn’t stop, stop the compressor.
2. The internal fan runs for 60 seconds.
3. The external fan runs for 60 seconds.
4. The compressor runs for 60 seconds with low limit speed, meanwhile the external fan runs with 50% full speed.
5. The compressor runs for 60 seconds with upper limit speed, meanwhile the external fan runs with full speed.
6. If configured with heater, starts heater and runs for 120s.
