Heating Operation Mode - Haier 2HUM18HC03/R2 Service Manual

* timing system on/off function.
* Dormant control function.
5.1.4

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 Ts, the outdoor compressor is turned on, the indoor fan will be at the cold air proof mode.
If Tr>Ts+, the outdoor system is turned off, the indoor fan will be at the heat residue sending
mode.
If Tr<Ts+, the outdoor system will be turned on again, the indoor fan will be at the cold air proof
mode.
*Indoor fan control
manual control: You can choose high, medium, low and automatic speed control.
Automatic: When Tr<Ts, high 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 indoor operation within 4 minutes after the start up is as the following diagram, the air
speed can be raised only after the speed has reached a certain level.
Heat start temp 1
2
Heat start temp
3
Heat start temp
4
Heat start temp
2. 4 minutes after the start up of the indoor fan, the light airflow and the low airflow will be turned
to the set speed airflow.
3. In the cold air proof operation, the fan won't stop after the start up.
4. During the cold air proof operation, the indoor system will continuously send 'indoor high
speed' signals to the outdoor system.
* Residue heat sending. The indoor fan will send the residue heat at a low speed for 12 seconds.
If other conditions are satisified, when the compressor stops, the indoor system will operate at a
light speed. The indoor fan will stop when the coil temperature is below the 'heat start temp 4'.
* Defrosting. When the system receives the defrosting signal from outdoors, the indoor fan will
stop and the indoor temperature display won't change. At the time, any indoor coil malfunctions
will be neglected. When the outdoor defrosting finishes, the coil malfunction will still be neglected
2HUM18HC03/R2(DB)-SM
1
When Ts=<Tr=<Ts+2 , medium speed.
When Tr> Ts+2 , low speed.
Low speed
Light speed
Fan/off
Fan/off
Set speed
16
Wiring diagrams
Keep the high
speed. The fan
doesn't stop
Domestic air conditioner