Question about Cfm Daikin R410a Split System Air Conditioner
U4 System transmission between indoor and outdoor units Daikin
Failure of transmission between indoor and outdoor unit. Need details of possible causes and ways to fix
Sounds like an interconnecting wiring error. Check wiring connection i.e. wires are connected in right order 1 to1 2 to 2 etc. from indoor terminal board to outdoor terminal board. Also check for slack or loose connections.
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Posted on Jun 28, 2010
Have you found the problem with ya A/C yet PD with the U4 code, if so what was it.
Posted on Jul 27, 2010
Daikin air condition outdoor unit pcb.how to repair
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Posted on Mar 01, 2012
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Posted on Jan 02, 2017
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