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climatec
28-01-2012, 07:01 PM
Hello all. Ducted air conditioner on this I get the error indicating failure U4 PCBs communication between internal and external, and I found that it is the PCB that sends external signal. Someone could send me the service manual or suggest which component of the electronic PCB is to be replaced?
Thank you all and forgive my English is not that much of the translation google translate.

install monkey
28-01-2012, 07:32 PM
got an rzq manual
https://rapidshare.com/files/1884538377/rzq.pdf;

climatec
28-01-2012, 09:53 PM
:) thank , very useful