3. Operating temperature range 
3.1 For HDU-50HT03/H (T3 climate) 
Temp.                Mode  Rated  Maximum  Minimum 
DB  ℃ 
29 32  18 
Indoor 
WB  ℃ 
19 23  14 
DB  ℃ 
46 52  10 
 
Cooling 
Outdoor 
WB  ℃ 
24 31  6 
DB  ℃ 
20 27  15 
Indoor 
WB  ℃ 
14.5 ---  -- 
DB  ℃ 
7 24  -7 
 
Heating 
Outdoor 
WB  ℃ 
6 18  --- 
 
3.2 For other units 
Temp.                Mode  Rated  Maximum  Minimum 
DB  ℃ 
27 32  15 
Indoor 
WB  ℃ 
19 23  14 
DB  ℃ 
35 43  10 
 
Cooling 
Outdoor 
WB  ℃ 
24 26  6 
DB  ℃ 
20 27  15 
Indoor 
WB  ℃ 
14.5 ---  -- 
DB  ℃ 
7 24  -7 
 
Heating 
Outdoor 
WB  ℃ 
6 18  --- 
 
3.3 Brief Introduction for T1、T2、T3  working condition 
 
Climate type 
Type of Air 
Conditioner 
T1 T2 T3 
Cooling Only   
18 ℃~43℃ 10℃~35℃ 21℃~52℃ 
Heat pump 
-7℃~43℃ -7℃~35℃ -7℃~52℃ 
Electricity Heating 
~43℃ ~35℃ ~52℃ 
Operating temperature range