press "On/Off" for 2s to enter the Cooling Frequency Threshold Settings; 
press the Up/Down key to select the cooling frequency threshold, press 
"OK" to confirm; and press the "On/Off" for 2s to exit 
Indoor Target 
Frequency oT 
press  "ON/OFF"  for  2s  to  enter  the  Heating  Frequency  Threshold 
Settings;  press  the  Up/Down  key  to  select  the  heating  frequency 
threshold, press "OK" to confirm; and press "On/Off" for 2s to exit 
press "On/Off" for  2s to  enter  the Cooling  Temperature  Compensation 
Value Settings, the code displayed is  “Ch”, then press "OK" to send the 
Query  Cooling  Temperature  Compensation  Value  code;  press  the 
Up/Down  key  to  select  the  cooling  temperature  compensation  value, 
then press "OK"; and press "On/Off" for 2s to exit. 
press "On/Off" for 2s  to  enter the Heating Temperature Compensation 
Value Settings, the code displayed is  “Ch”, press "OK" to send the Query 
Heating Temperature Compensation Value code; press the Up/Down key 
to select the heating temperature compensation value, then press "OK"; 
and press "On/Off" for 2s to exit. 
press "On/Off" for 2s to enter the Max. Cooling Air Speed Settings, the 
code displayed is  “Ch”, press "OK" to send the Query Max. Cooling Air 
Speed code; press the Up/Down key to select the max. cooling air speed, 
then press "OK"; and press "On/Off" for 2s to exit. 
press "On/Off" for 2S to enter the Min. Cooling Air Speed Settings, the 
code displayed is  "Ch", press "OK"  to  send  the Query Min. Cooling  Air 
Speed code; press the Up/Down key to select the minimum cooling air 
speed and press "OK" to confirm; press "On/Off" for 2s to exit. 
press "On/Off" for 2s to enter the Max. Heating Air Speed Settings, the 
code displayed is "Ch", press "OK" to send the Query Max. Heating Air 
Speed code; press the Up/Down key to select the maximum heating air 
speed and press "OK" to confirm; press "On/Off" for 2s to exit. 
press "On/Off" for 2s to enter the Min.  Heating Air Speed Settings, the 
code displayed is  "Ch",  press "OK"  to  send  the Query Min. Heating Air 
Speed code; press the Up/Down key to select the minimum heating air 
speed and press "OK" to confirm; press "On/Off" for 2s to exit. 
In Channel 1~30 settings of the engineer mode, long press the On/off key to return the previous 
engineer mode. 
Exit of engineer mode: 
1)In engineer mode, press the key combination of “On/Off + Air speed” for 2s; 
2)The engineer mode will be exited if there are no valid key operations for continuous 60s.