Haier AP242ACAAA Technical Manual page 39

(4) Warm start (avoid of cool air at the beginning of heating , applies to cooling and heating model )
At the just beginning of heating, indoor fan motor will delivery air as follows:
if indoor coiled temperature 28 ,start low fan speed;
if indoor coiled temperature
change to setting fan speed.
(5) Indoor fan motor control at heating stopped state (applies to cooling and heating model)
At heating state, if only compressor stops, fan motor will stop after a run of 30S at low speed.
(6)Defrost control (applies to cooling and heating model )
Defrost starting condition:
a. When machine starts heating and after 35 minutes continuous operation of compressor;
b. Accumulated heating time of compressor is 45 minutes and compressor
run continuously more than 5 minutes;
If one of the above conditions is meet and maintain 2 minutes below curve in
the following figure, defrost will start .
-3
-4
-5
-6
-7
-8
-9
-10
-11
-12
-13
-14
-15
-16
-17
-18
-19
-20
-21
-14 -13 -12 -11 -10 -9 -8
Termination condition of defrost:
When outdoor coiled temperature is equal to or more than 14
original heating state will be returned.
Note: defrosting order:
Compressor
Indoor fan motor
Outdoor fan motor
4-way valve
38 or operation of compressor
-7 -6
ON
OFF
ON
OFF
ON
OFF
ON
OFF
55s
1min
-5 -4 -3 -2 -1
or defrosting time exceeds 12 minutes,
12 minutes
20S
55s
1min
29
4 minutes,
3 4 5 6
1 2
Start on cold
air proof condition