Daikin EBLA11DAV3 - U3-00 - under Floor Heating Screed Dry out Function Not Completed Correctly; U4-00 - Indoor;Outdoor Unit Communication Problem

2 | Troubleshooting
Service manual
59
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Possible cause: Faulty outdoor unit fan motor.
4 Perform a check of the main PCB. See "3.14Main PCB"[4171].
Possible cause: Faulty main PCB.
5 Perform a check of the noise filter PCB. See "3.15Noise filter PCB"[4194].
Possible cause: Faulty noise filter PCB.
6 Wait until the compressor restarts.
Possible cause:
▪ Momentary drop of voltage,
▪ Momentary power failure.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.71 U3-00 – Under floor heating screed dry out function not completed correctly
Trigger Effect Reset
Under floor heating
screed dry-out is
interrupted.
Unit will stop operating. Manual reset via user
interface.
To solve the error code
1 Check if the power supply is conform with the regulations. See "4.1Electrical
circuit"[4284].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.72 U4-00 – Indoor/outdoor unit communication problem
Trigger Effect Reset
Communication failure
between outdoor and
indoor unit.
Unit will stop operating. Power reset via outdoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check if the power supply is conform with the regulations. See "4.1Electrical
circuit"[4284].