What does f-1 mean on the digital pad - KitchenAid Microwave Ovens

There is a transformer which powers the front panel. Normally attached to the front panel bord. If the transformer is faulty the such problems can occur.
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• 1.8 CF Oven Cavity
• Electronic Touch Controls
• 950 Watts
• Display On/Off Yes (option pad)
• Add 30 Seconds Instant-On
• Cooking System CircuWave®
• Defrost - Auto / Time / 1 lb. Quick Defrost
• Delay Start
• Express Cook Instant-on 1-6 minutes
• Instant On Controls
• Micro / Time Cook I & II
• 10 Power Levels
• Wire Oven Rack
• Cooktop Lighting - Bright/Night/Off
• Demo Mode
• Interior Oven Light - Halogen
• Night Light (option pad)
• Child Lockout
• Easy Mount Installation
• Exhaust Fan 3 Speed Plus Boost (315 CFM)
• Cooking Complete Reminder
• Timer (On/Off)
• Reminder (24 hr)
• Sound Volume Control - 4 levels
• Sensor Controls
• Beverage Instant-On
• Popcorn Instant-on
• Potatoes Instant-on
• Reheat Instant-On
• Sensor Controls
• Vegetables Instant-on, 3 pads (canned, frzn, fresh)
• SmartControl System
• Clock Plus AM/PM pad
• Concurrent Programming
• Custom Pad
• Electronic Scrolling Digital Display - 2 line
• Help Pad
• Variable Scroll Speed - 5 Speeds (Options Pad)
• 14.25 " Turntable - Glass Recessed
• Turntable On / Off
• 2 Wire Oven Racks; 2 Positions
• Recirculating Charcoal Filter Kit JX81B

If the keypad is not working, chances are that the keypad had got faulty, some cases it can be failure of the membrane carbon tracks. other wise it can be moisture build up or even a connector fault of the key pad. You can try and remove the pad and PCB and use a hair dryer to warm the pads and the pcb. if you notice any insects or coakroaches inside , then it can also be due to secretion damage on the pcb which means that the touch pad must be replaced.

"SE" error means you have a shorted membrane keypad.

You would need to have either the membrane keypad itself replaced, or the control panel frame assembly which comes with a new keypad, or the whole controller.

Part numbers and prices will of course depend on the model number.

The only way possible to see if the touch pads are working is to test the voltage of the control pads when it contacts. The input of the Microprocessor should be checked for the pad control impulse to come in. If there is no trigger voltage to the mP this can be the control pad problem.
The mP must be checked for the working voltage and also the frequency oscillation at the crystal leads. If so the mP is working with a suspected control pads which are not able to set the program or timing.
There is no way but to remove the sticker pad and replace, One difficult way to have a chance is to remove the carbon sticker pads and check continuity , You can use a carbon pen to line the tracks so that the multi-meter reads a continuity. With this you can have a temporary fix

You can set the clock to a 12 or 24 hour system.
For 12 hour - Touch clock pad once Enter the time using the number digits (1:00-12:59) Touch clock pad again
For 24 hour - Touch clock pad twice Enter the time using the number digits (0:00-23:59) Touch clock pad again

According to the manual:
Press "Clock" pad once to set clock for 12 hour time clock
and
Press "Clock" pad twice to set the time for Military time.

I'm not sure what you mean by "goes to" military time.
Is that after you've already set it for a 12 hour time clock?

Did someone perhaps clean the pad with a wet rag or spray cleaner on it? This will make it inoperable and will sometimes self correct with time. Most times not and the pad has to be replaced.
Eric

Key panel (touch pad) shorted(f-3)

This code will occur if a shorted key panel is detected continuously over 60 seconds. Replace key panel (also called touch pad).

A hard reset, that is, removing the unit from the electric source and restarting it after a few seconds, solved the problem.