supply of microprocessor controllermicroprocessor controller,microprocessor controller for roof mounted ac package unit for lhb coaches conforming to rdso spec no. rdso/pe/spec/ac/0139-2009 (rev. 1) or latest. accepted make brand : amit, pvr controls, sidwal and similar note:- on supply of material at every piece ,supplier shall have to paste vin yl stickers of suitable size bearing qr code containing information as per format attached in documents. backend information of qr code should be stored at railway?s server/ google drive as directed by railway administration. [ warranty period: 30 months after the date of delivery ] ]