Technical Manual - Carpat Energy

9.7.4 Low outlet water temperature protection at COOL (Code: AL03)At cool mode, if ST≤AL01, all the compressors will be stopped, other parts will keep their original state. Acontinuous blink warning code AL03 will appear on the LCD, until ST≥AL01+AL02, the unit will turn to its normalwork.9.7.5 The outdoor side low outlet water temperature protection at HEAT (Code:AL04)When SF03=1, in heat mode working, if STO≤AL01, all the compressors will be stopped, other parts will keeptheir original state. A continuous blink warning code AL04 will appear on the LCD, until STO≥AL01+AL02, the unitwill turn to its normal work.9.7.6 High outlet water temperature protection at HEAT (Code: AL05)In heat mode, ST≥AL03, all the compressors will be stopped, other parts will keep their original state. Acontinuous blink code AL05 will appear on the LCD, until ST≤AL03+AL04, the unit will turn to its normal work.9.7.7 Water flow switch protection (Code: AL17)At normal working condition, if there is no signal from water flow switch within AL05 after starting the outdoorside water pump, a continuous blink warning code AL017 will appear on the LCD.During unit working, when check FS=OFF, all the compressors will be stopped, other parts will keep their originalstate, a continuous blink warning code AL017 will appear on the LCD.9.7.8 Low evaporate temperature protection (Code: AL20)The protection function will be valid at COOL mode as well as at HEAT mode when SF03=1During normal working, if ET≤AL08, all the compressors will be stopped, other parts will keep their original state,a continuous blink warning code AL20 will appear on the LCD.