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F1 - is either a stuck keypad or an open relay problem
This the standard check -
Determine if problem is with the Key Panel or Control by:1. Pushing CLEAR/OFF pad.2. Disconnecting Ribbon Cable from control and waiting at least 32 seconds to see if Code recursIf code recurs, problem is in the control. Replace control.If code does not recur, problem is with the Key Panel.
Let me know if you would like more information. Please post the model number from the cabinet for more specifics.