Haier HSU09 VHG(DB)-G&W Service Manual

Contents

HSU-09VHG(DB)-SM Funcitions and Control19Domestic Air Conditioner5.1.10 Urgent on/off inputPress the urgency button the buzzer will ring. The system will enter the automatic mode if you don’tpress 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 doesn’t 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 doesn’t 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 doesn’t work.The temperature control doesn’t work.The test operation will be finished in 30 minutes.The test operation can be stopped by the relative commands from the remote control.5.1.11 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.5.1.12 High load protection controlThe outdoor system will be stopped if the coil temperature is above 65ć for 2 minutes. The indoorfan will be controlled by the thermostat. The outdoor system can be restarted when the coiltemperature is below 42ć and the system has been stopped for 3 minutes. The malfunction will bestored in the malfunction resume and will not be revealed.