User Interface
CoolMaster User Manual
16
www.coolautomation.com
© 2008 Cool Automation
Led Functions
5.2
The unit is equipped with 2 leds, as can be seen in the figure below.
Leds indicate whether there is a communication with the Air Conditioning system. When there is no
communication, the upper led is off. When the CoolMatser senses the communication from the Air
Conditioning system, the upper led starts blinking. The lower led is currently not functioning.
PC Connectivity
5.3
When the CoolMaster is connected to the air conditioning system it is suggested to check its
performance by connecting it to a PC or Laptop.
In order to do so the device has to be connected to the serial PC Port (RS232) or to USB port by using
a transformer cable RS232 to USB and appropriate driver.
After the connection, the “Hyper Terminal” program should be engaged, using the following sequence:
Start -> Programs -> Accessories -> Communications -> Hyper Terminal