Centrex air conditioner keeps cutting out and...

Question

I have a centrex 6 KW spit unit air conditioner which often just cuts out the green power light starts to flash and then the unit turns off it happens more often on the cooling cycle but still does it on the heating. Does anyone have the same problem or knows what is wrong with my unit..Any help would be great.I'm i better to just buy a new unit.Thank you.