Haier AB092FDAHA User Manual - Page 2

Contents Safety cautions 1 Indoor unit installation 2-7 Refrigerant piping 8-9 Electrical wiring & Application control 10-14 Trial operation 15 Troubleshooting 16-17 Panel installation 18-21 Caution Auto Restart function for C-MRV models Haier Auto Restart function: when the unit power drops down suddenly, the unit microprocessor will store the previous working condition and when the power is on again, the unit will run as this memory. Auto Restart function is designed basically on the MRV whole system, but it is suitable for each indoor unit individually. If some of indoor units power cut down, but the outdoor unit and the other indoor units still work, maybe problems will happen such as freezing at cooling mode and overload protection at heating mode on those indoor units without power. Reason When one or some indoor units power drops down and the other indoor units are still work, the indoor units without the power, will keep the previous working condition before the power is off. And expansion valve keeps open at a kind of opening rate condition as the previous requirement, so there is refrigerant flowing in the exchanger, but the indoor fan stops working. If the units work at cooling mode, the indoor units without the power will maybe make freezing. If the unit works at heating mode, maybe the outdoor unit compressor will stop because of the pressure or temperature protection. This is our design basically on Auto Restart function currently. Haier, Herewith, solemnly informs our customers, installers, distributors, etc. when making installation, please make sure when the power is shut down whether artificially or accidentally, the whole system including outdoor unit and all the indoor units must be off. If you do not make the installation as our indication, Haier will not be responsible for any problem resulting from this. 21