IRNSS-1A Satellite had gone through all electrical checks and was ready for propellant filling with the PSLV-C22 vehicle fully integrated and undergoing electrical checks.
But, during the electrical checks, an anamoly was observed in one of the electro-hydraulic control actuators in the second stage, Indian Space Research Organisation said in a statement.
It has been decided to replace the actuator, it said, adding, that it needs two weeks of activity at the Launch Pad and the Vehicle Assembly Area.