Haier AS12TA2HRA-TH2 Service Manual

Functions and control18 Domestic air conditioner2 centigrade after 1 hours operation and will fall 2 centigrade 1 hour later. 3 hours after the precedingoperations, the set temperature will be raised for 1 centigrade and the system will keep this status for3 hours and then close down.2.3 During the dormant time, except the change of the system mode or a new press on the dormantsetting keys, the timing of the 8 hours dormancy will take the first timing as the start time, any presseson other keys will not affect the original timing.2.4 Indoor fan control under the dormant operation.If the indoor fan is at the high speed before the dormant operation setting, the speed will be turned tomedium after the setting. If the fan is at the medium speed before the dormant setting, the speed willbe turned to low after the setting. If the fan is at the low speed before the dormant setting, the speedwill not change.7.1.10 Urgent on/off inputPress the urgency button the buzzer will ring. The system will enter the automatic mode if you dontpress the button for more than 5 seconds.Under the system off mode, if you press the urgency key for 5 to 10 seconds, the system will start thetest operation.Under the system off mode, if you press the urgency key for 10 to 15 seconds, the display screen willshow the resume of the last malfunction.If the system is under operation, the press on the urgency key will stop it.Under the system off mode, the display screen will show automatic running sign.Under the system off mode, the system will not receive the remote control signal if the press on theurgency key doesnt last for 15 seconds or if the key is loosened.Urgency operation: If you press the urgency key for less than 5 seconds, the buzzer will ring when youpress the on/off key. The system will enter the urgency operation when the urgency key is loosened.The urgency operation is fully automatic.Test operation.The inlet temperature sensor doesnt work, the indoor fan and the indoor air direction board motorworks synchronically. High speed airflow, cooling, outdoor system on, etc, will send the ambienttemperature 30 centigrade and coil temperature 16 centigrade information to the outdoor system.Test operationThe defrost protection of the evaporator doesnt work.The temperature control doesnt work.The test operation will be finished in 30 minutes.The test operation can be stopped by the relative commands from the remote control.7.1.11 Low load protection controlIn order to prevent the frosting of the indoor heat interaction device, the outdoor system will bestopped if the indoor heat interaction temperature is below zero centigrade for 5 minutes, but the fanwill continue to operate. The outdoor system will be started again when the heat interactiontemperature is above 7 centigrade and the system has been stopped for 3 minutes. The malfunctionwill be stored in the malfunction resume and will not be revealed