Question about Fujitsu 24C1 Air Conditioner

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System will not start up.

We have a three pipe fujitsu heat pump system running 7 indoor units. 6 ceiling cassettes and 1 wall mount. All ceiling units seem to operate ok however the wall mount is flashing the power led constantly (red) and the green and yellow flash three times together then stop then three more times and so on. The outdoor unit does not come on.(A090MPBMF). We have power to the outdoor unit. We have tried a restart,by shutting down the whole system then starting the outdoor unit and then the indoor units with the same results. We have checked for phase reversal. The machine is less than a year old and was not installed by ourselves. The indoor units are all remote controled. Firstly can you tell us what the fault code is flashing and secondly any suggestions as to the cause and how to rectify. Many thanks.

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This is a signal fault between the indoor and outdoor first make sure the dip switches are set start with the unit closest to the condensor set as unit 1 then next unit as 2 and so on the dip switches are inside the indoor unit on the pc board if you check the manual it will tell you which swithes to set, if this wasnt done when the units where installed they would have never worked i would also check the signal wiring between the wallmount and the splitter box / bc box and make sure there isnt a loose connection when you have ruled this out id say more than likely it is a faulty indoor board on the wallmounted unt

Posted on Apr 08, 2009

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