Turbo Air TAS-18EHN Service Manual page 37

The anti-cold wind function is as below:
Auto fan action in heating mode.
For TAS-09EHN, TAS-12EHN, TAS-18EHN models:
For TAS-24EHN model:
8.4.3.4 Defrosting mode
Condition of defrosting:
----T4＞0℃,
When the units are running, if the following two items are satisfied, the units start defrosting:
The units run with T3＜3℃ for 40 minutes and T3 keeps lower than TCDI℃ for more than 3 minutes.
T1-Ts+¦ ¤ T
0.0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-6.5
T1-Ts
Low
2.5
2.0
Medium
1.5
1.0
37
L
(H+-L)*0.2+L
(H+-L)*0.4+L
(H+-L)*0.6+L
(H+-L)*0.8+L
H+
High