I am not familiar with your coachspecifically, but it is probably indicating that the LP gas is not lighting for your water heater. From your picture it looks like you have both LP gas on and 110VAC heater on for the hot water. Does the fault light go out when you shut off the LP gas switch? If you cycle the LP gas switch it should retry starting the water heater. If your LP gas does not start in the water heater, it is time to check out the reason why.
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