To load the custom functions first download the files to the phone or laptop. Connect the phone or laptop to the programmer, select the load function menu and upload the function file. Then click on the select function menu and load the custom function into the timer. Download both H1 and H2 files if you are unsure about the hardware version 1 or 2.
Timer Custom Functions
This page provides a list of custom functions available for the 5 amp timer and 10 amp timer.