Received a replacement panel for my Hunter PC-300 controller (circa 2001). After installation the new panel would not recognize stations on an expansion module. Called the Sprinkler Supply Store and was referred to a Hunter procedure to reset the gray expansion module. However, this procedure was not appropriate for my controller. So, I unplugged the controller, waited and then plugged it back in. The controller recognized the expansion module stations and I completed the installation & programming. Either the Supply Store should include appropriate instructions with the replacement panel to cover this situation or get Hunter to write appropriate instructions for this 526200 replacement panel.