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It is apparently a bogus error code, however if the unit is not running something else is wrong, if you can send me a clear, well focused, well lit photo of the units wiring diagram I might be able to help you diagnose it. So far I suspect its a tripped high or low pressure switch, or possibly a temperature sensor clipped to the cooling coil that is the problem.
Use the paper clip icon at the right end of the tool bar above to send the photo.