By default pings are disabled on the 220v, you need to access the GUI and click Advanced on the top left side, then Advanced again, go to System on the menu down the left and then Remote Access and tick the Ping box and that will allow pings through.
By default pings are disabled on the 220v, you need to access the GUI and click Advanced on the top left side, then Advanced again, go to System on the menu down the left and then Remote Access and tick the Ping box and that will allow pings through.