Haier 2HUM18HC03/R2 Service Manual

Also see for 2HUM18HC03-R2: Installation manual Installation manual Operation manual Installation manual

2HUM18HC03/R2(DB)-SM Wiring diagrams16Domestic air conditioner* timing system on/off function.* Dormant control function.5.1.4 Heating operation mode.* temperature control range: 16---30ć* temperature difference: r1ć* control feature: the temperature compensation is automatically added and the system will sendthe heating signals to the outdoor system.If TrdTs, 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 sendingmode.If Trmode.*Indoor fan controlmanual control: You can choose high, medium, low and automatic speed control.Automatic: When TrWhen Ts=ć, medium speed.When Tr> Ts+2ć, low speed.When the airflow speed has no delay from the high to low switching, the speed should bedelayed 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 operation1. The indoor operation within 4 minutes after the start up is as the following diagram, the airspeed can be raised only after the speed has reached a certain level.2. 4 minutes after the start up of the indoor fan, the light airflow and the low airflow will be turnedto 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 highspeed’ 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 alight 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 willstop and the indoor temperature display won’t change. At the time, any indoor coil malfunctionswill be neglected. When the outdoor defrosting finishes, the coil malfunction will still be neglectedHeat start temp 1Heat start temp 2Heat start temp 3Heat start temp 4Set speedLow speedLight speedFan/offFan/offKeep the highspeed. The fandoesn’t stop