Daikin 51e/140

[Pirre]

Hello guys

iam new here, we have problem whit: A3 Malfunction of drain level control system.
this came after change of indoor module.

[frank]

Check that the drain level sensor is connected correctly to the new pcb board.
Look for the wiring diagram on the inside of the indoor electrical cover and it will reference the sensor wiring and the X?? connector on the pcb

[Pirre]

thx, i will check this first.

[Pirre]

Hello. I did check the drain lvl sensor and i found a missing bridge connector.
Now its trowing another fault U0-04. its how does i reset this one?

best regards

[frank]

Looks like a refrigerant shortage
https://www.google.co.uk/url?sa=t&source=web&rct=j&url=https://www.ultimateair.co.uk/downloads/documents-and-guides/Daikin/Fault-Codes-Indications/DAIKIN-Fault-Codes-Sky-subcodes-BRC1E.pdf&ved=2ahUKEwjvmMj73s31AhUHYcAKHfL-DAkQFnoECAMQAQ&usg=AOvVaw3KLdxe3KQVuC8dmtXCGsV9

[Pirre]

hi again, thx for input.
i have checked the instruction manual and here is no U0-04
The nearst is U4: Wiring error between indoor and outdoor unit. Or indoor and outdoor printed circuit board failure.

[frank]

Look at the top of page 3 of the link I have posted U0-04 Refrigerant Shortage or Blockage

[Pirre]

hmm.. yes i see
how to solve this U4 issue, any thoughts?
it has new cards(pcb) in outdoor and indoor unit.

[frank]

U4 is a failure of data transmisson between the indoor and outdoor pcbs

Check the wiring and make sure terminal's 1, 2 and 3 are correctly terminated at each end to rule out mis-wiring. Also check the wiring in any local isolators and high limit switch if you have an indoor condensate pump.

[Pirre]

thanks ill have to check the wiring this weekand.
What about U0-04?

[frank]

thanks ill have to check the wiring this weekand.
What about U0-04?
Unfortunately you will need someone with the correct tools and knowledge to solve that one