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Thread: Daikin 51e/140
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14-01-2022, 06:42 AM #1
Daikin 51e/140
Hello guys
iam new here, we have problem whit: A3 Malfunction of drain level control system.
this came after change of indoor module.
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14-01-2022, 08:34 AM #2
Re: Daikin 51e/140
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
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14-01-2022, 01:11 PM #3
Re: Daikin 51e/140
thx, i will check this first.
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25-01-2022, 02:56 PM #4
Re: Daikin 51e/140
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
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25-01-2022, 08:31 PM #5
Re: Daikin 51e/140
Looks like a refrigerant shortage
https://www.google.co.uk/url?sa=t&so...QVuC8dmtXCGsV9
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26-01-2022, 09:54 AM #6
Re: Daikin 51e/140
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.
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26-01-2022, 09:56 AM #7
Re: Daikin 51e/140
Look at the top of page 3 of the link I have posted U0-04 Refrigerant Shortage or Blockage
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26-01-2022, 02:56 PM #8
Re: Daikin 51e/140
hmm.. yes i see
how to solve this U4 issue, any thoughts?
it has new cards(pcb) in outdoor and indoor unit.
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26-01-2022, 09:19 PM #9
Re: Daikin 51e/140
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.
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27-01-2022, 06:11 AM #10
Re: Daikin 51e/140
thanks ill have to check the wiring this weekand.
What about U0-04?
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27-01-2022, 06:26 AM #11