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Lancelot52
22-11-2016, 05:05 PM
Hey guys...

We have a Fujitsu AOU24RML1 with two evaporators, and each one gives us the code: Operation light: off Timer light blinks 2 times and the other lights on the front panel off.
In the trouble shooting it says: Serial reverse transfer error. The wiring is hooked up properly, the boards in the condensing unit are brand new, any idea ??

thanks a lot and you all have a good day !!!

Brian_UK
22-11-2016, 07:07 PM
What about the boards in the evaporators?

You say that the hooked up correctly but have you checked the integrity of the wiring?

Lancelot52
22-11-2016, 09:00 PM
What about the boards in the evaporators?

You say that the hooked up correctly but have you checked the integrity of the wiring?

Thanks Brian. So far the boards seems to be ok, we' ll pursue our investigations. What I find strange though, is that the two boards are giving me the same error code . So I think it must come from the outdoor unit ???
The wiring is brand new. Thanks again man