Haier D Series Service Manual page 18

*Defrosting function: preventing the frosting on the indoor heat exchanger (when cooling or
dehumidifying). When the compressor works continuously for 6 minutes and the temperature of the
indoor coils has been below 1
will be recorded in the malfunction list. The indoor system will continue to run. When the temperature
of the indoor coil is raised to 9 , the compressor will be restarted again (the requirement of 3 minutes'
delay should be satisfied.)
* Coil protection (synchronic overheating protection) are installed for the four directions latch
malfunctions when dehumidifying.
* Timing system on/off function.
* Dormant control functio n.
7.1.4 Heating operation mode.
* temperature control range: 16---30
* temperature difference:
* control feature: the temperature compensation is automatically added and the system will send the
heating signals to the outdoor system.
If Tr+0.5 dTs, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode.
If Tr>Ts+1.5 , the outdoor system is turned off, the indoor fan will be at the heat residue sending
mode.
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr<Ts, high speed.
When Ts”Tr”Ts+2 , medium speed.
When Tr> Ts+2 , low speed.
When the airflow speed has no delay from the high to low switching, the speed should be delayed for
3 minutes (remain at high speed for 3 minutes.) before the next switch.
*Airgate location control: the location for the airgate can be set according to your needs.
Coldair proof operation
1. The fan control functions as below:
37
for 10 seconds, the compressor will be stopped and the malfunction
r1
set
medium speed
low speed
35
weak speed
25
stop
3 7
35
25
16
16
Functions and control
Domestic air conditioner