You must check if there is power to the fan to confirm if there is failure of the fan motor. Since the FR display indicates there is possibility that the power is initiating.
If the remote unit is not powered from the main unit then it is possible that the main control section must be checked for failure in the control unit.
Check for faulty wiring to the remote unit-or a break in the wiring from the main unit. Check the received voltages on the remote unit.
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