Question about Daikin RXYMQ48MVJU, VRV-S Air Cooled Eight Zone Outdoor Inverter Heat Pump -

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Code u 4 - Daikin model Rxymq48mvju - Daikin RXYMQ48MVJU, VRV-S Air Cooled Eight Zone Outdoor Inverter Heat Pump -

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U4 Is a communication error between indoor and outdoor units.
usually means one of the PC boards is faulty. If unit has been freshly installed check wiring between indoor and outdoor 1,2,3 are the same colours on both boards.

Posted on May 17, 2014

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Posted on Jan 02, 2017

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