be started again 3 minutes later after shutdown. 
There is no 2-minutes limit when changing the temperature setting or shutting off the machine through 
the remote controller, and the machine can be shut down immediately. 
Avoiding electrical shock: outlet air is available 2 seconds later after startup. 
Timer on, Timer off and sleep control are available. 
Control of 4-way valve: When the unit is started for the first time, the 4-way valve starts runnig 10 
seconds earlier than compressor does. After compressor stops runnig, the 4-way valve continues 
running for 2 minutes and 30 seconds then stops. If changing the unit from heating to cooling, the 
4-way valve is shut off 2 minutes later and compressor is started 3 minutes later. 
Cold blast avoidance mode: 
      (1)Compressor is interrupted during the defrosting operation and continues to run after defrosting is 
completed. When the indoor exchanging temperature is below 23℃, the indoor fan motor is off. 
When the indoor exchanging temperature is above 23℃, the indoor fan motor is running at 
weak speed. 
    (2)If the temperature of coil pipe can’t be above 38℃ 4 minutes later after startup, fan motor is 
running at the preset wind speed. 
      (3) If the temperature of coil pipe is above 38℃  in 4 minutes after start up, fan motor is running at 
the preset wind speed immediately. 
   (4)If coil pipe descends to the temp. lower than 38℃ from 38℃. fan motor still running at the 
preset wind speed. 
   (5)If the temperature sensor is off. Compressor stops runnig. If the temperature of coil pipe is 
above  23℃, fan motor enter breeze mode; and if the temperature of coil pipe is below 20℃, 
fan motor stops running. 
      (6)Shut down the unit and indoor fan motor stops running. 
High temperature protection and high temperature expiration protection: 
z  High temperature prevention: When the temp. of coil pipe is above 64℃, the outdoor fan motor 
stops.When the temp descends to 60℃, the outdoor fan motor is restarted and  fan speed 
invertage frequence is more than 45 seconds. High temperature expiration prevention: When 
the temp. of coil pipe is above 73℃,compressor and outdoor fan motor stop running 2 seconds 
later, and inlet air runs as the temp. sensor is off. When compressor stands by for 3 minute and 
the temp. of coil pipe is below 64℃, the unit can be started again. 
Current protection and current expiration protection: (Not detecting within 60 seconds after startup) 
z  Current protection: If current detected is above 
(HSU-12HV03/R2:5.8A;HSU-09HV03/R2:4.5A;HSU-07HV03/R2:4.2A) and lasts 10 
senconds continuously, outlet air stops. If current detected is below 
(HSU-12HV03/R2:5.2A;HSU-09HV03/R2:4.2A;HSU-07HV03/R2:3.8A) , outlet air is 
regained 。 Current peak expiration protection: If current detected is above 
(HSU-12HV03/R2:9.5A;HSU-09HV03/R2:8.5A;HSU-07HV03/R2:8.5A) , 3 seconds later the 
system enter current cross protection, compressor and air outlet stop and start again 3 minuts 
later, and air inlet runs as the temperature sensor is off.(different mode has the different CT 
value) 
Overcooling protection: 
          One and a half minute later after compressor starts, if the temperature of coil pipe is below -4℃, 
compressor and air outlet stop, and air inlet runs according to the temp. setting. Compressor can be 
Air Conditioner