Hi. I have attached the tech sheet for you as well as the wiring diagram. The F70 error code is a communication error between the main control and U.I. Refer to page 9 of the tech sheet for the f70 error code. The tech sheet does not have a test procedure to find out which one is faulty. Try resting the unit and checked your connections at the board and console. Check for any visual damage to each. If you have buttons or lights that are not functioning this would be a sign that the console is faulty.
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