1. Operation Mode 
  
1. Automatic operation  
When the system is under the automatic operation option, the appropriate operation mode will 
be decided according to the differences between the preset temperature and the indoor temperature 
after the system starts up. Then, the system will operate according to the chosen mode. In the 
following conditions, Tr stands for indoor temperature and Ts stands for outdoor temperature. 
The system will choose the operation mode according to the following conditions when entering 
into the automatic operation option for the first time. 
Tr≥Ts-3℃            Choose the cooling mode 
Tr<Ts-3℃            Choose the warming mode 
Under the automatic option, the system will switch between the cooling and warming modes 
according to the change of the indoor temperature. If the air conditionic is under the cooling mode, 
when the preset temperature for stopping the compressor is reached, the compressor will be stopped. 
The indoor temperature will be tested again 15 minutes after the stop of the compressor. At the 
moment, if the tested temperature is under the Tr<Ts-3℃  condition, the system will be switched into the 
warming mode. If not, the system will remain in the cooling mode. If the air conditionic is under the warming mode, 
when the preset temperature for stopping the compressor is reached, the compressor will be stopped. 
The indoor temperature will be tested again 15 minutes after the stop of the compressor. At the 
moment, if the tested temperature is under the Tr>Ts+8℃  condition, the system will be switched into the 
cooling mode. If not, the system will remain in the warming mode.   
 
2. Cooling operation mode 
Temperature control range:  16℃---30℃ 
Temperature difference: ±1℃ 
* Control features: When Tr(input airflow)>Ts(set temperature)℃, the outdoorunit will be 
opened,the indoor fan will operate at the set speed and the mode signal will be sent to the outdoor 
system. When Tr(input airflow)< Ts(set temperature)℃, outdoorunit will be closed,the indoor 
fan will operate at the set speed and the mode signal will be sent to the outdoor system. The system 
will keep the original status if Tr= Ts. 
Airflow speed control: (temperature difference 1℃) 
Automatic: When Tr>=Ts+3℃, high speed. 
         When Ts+1℃=<Tr<Ts+3℃, medium speed 
         When Tr<Ts+1℃, low speed 
         When the sensor is off, low speed 
When the airflow speed has no delay from the high to low switching, the speed should be delayed 
for 3 minutes (remain at high speed for 3 minutes.) before the next switch. 
 
Manul: When the system is operating, you can set the high, medium or low speed manually. ( When 
the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.) 
*Airgate location control: the location for the airgate can be set according to your needs. 
*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or 
demoisture). When the compressor works continuously for 5 minutes (adaptable in EEPROM) and the 
temperature of the indoor coils has been below zero centigrade for 10 seconds, the compressor will 
Air Conditioner