GE PFSS9PKY Technical Service Manual page 66

The "S/W Version" displays the code which tells you the software versions of the main and LCD boards.
The "HMI Test" allows for calibration of the touch screen. This callibration defi nes the touch zones of the
buttons on the screen. You will be prompted to touch different areas of the screen to calibrate the zones..
Once you have entered the standard diagnostic mode, you can enter an extended developer mode to run
forced functions for the sealed system and defrost. If you tap the bottom corners of the screen, starting on
the left and then right seven times, you will enter developer mode.
A
A-B-A-B-A-B-A
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B