Does anyone know if the 2008 Tucson CRDi AWD has a Single or Dual Speed radiator fan (lo/hi)?

I noticed that my coolant reservoir dried up last summer and this time again, akala ko kulang lang talaga last year... i noticed the fan works only if the AC is ON. So it looks like the cooling system is boiling-out the coolant.

Before I actually did not notice if it is working on two speeds. Ngayon ko lang in-obeserve kasi nga nawalan na naman ng coolant sa reservoir

Even if the engine is hot and the AC dis-engages(cabin cold temperature is reached) - the fan turns off.

I always knew from other cars that there is always a 2nd (Hi) speed on fans which works if engine temp is high... is this supposed to be the same for my Tucson? or it really has single speed (with AC ON only)...

Kung single speed nga lang talaga, then I have another problem why my coolant is drying up so quickly during summers..

Thanks guys.. i hope I can remedy this soon...