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ALC1
02-03-2016, 03:45 PM
Hi Guys,
Have a prob with a U4 fault on this single unit, have 30vdc coming of outdoor unit comms to earth wire 2vdc of indoor unit.
Checked drain -all clear, powered down and up no joy.
Flaps opens and closes on indoor -power 230v ok
suspect indoor unit pcb, any advice would be welcome

frank
02-03-2016, 08:51 PM
I would run a temporary single core wire between terminal 3 of the indoor and outdoor units to see if that solved the problem

nike123
02-03-2016, 09:03 PM
Check that terminal 1 and 2 on indoor and outdoor are correctly wired ( not mixed)!

subcoolfm
13-03-2016, 06:47 PM
I may be your saviour.

Is the led lit on the outdoor pcb?

if not, unplug outdoor fan motor, is it now lit (blinking)

try the outdoor eev head too,

had this fault on many daikin units,