Daikin Altherma EBLQ011CA3V3 - Extension PCB; Hydro PCB Mismatch Error

1 Troubleshooting
Service manual
22
EBLQ+EDLQ011~016CAV3+W1 + EBLQ+EDLQ011~016CA3V3+W1
+ EK(2)CB07CAV3 + EKMBUHCA3V3+9W1
Daikin Altherma – Monobloc
ESIE18-04 – 2019.02
Possible cause: Faulty wiring between the hydro PCB and
extension PCB.
2 Check if the power supply is conform with the regulations. See
"3.1Power supply"on page91.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
page58.
Possible cause: Faulty hydro PCB.
4 Perform an electrical check of the extension PCB. See
"2.12Extension PCB"on page56.
Possible cause: Faulty extension PCB.
5 Perform a check of the current loop PCB. See "2.10 Current
loop PCB"on page53.
Possible cause: Faulty current loop PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
1.4.62 UA-21 – Extension PCB / hydro PCB
mismatch error
Trigger Effect Reset
Communication
abnormality between
hydro PCB and
extension PCB after
communication was
already made.
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.
INFORMATION
In case of preferential kWh rate, the indoor unit also needs
a power reset.
1 Check the wiring between the hydro PCB and the extension
PCB. See "3.1Power supply"on page91.
Possible cause: Faulty wiring between the hydro PCB and
extension PCB.
2 Check if the power supply is conform with the regulations. See
"3.1Power supply"on page91.
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance
>10%),
▪ Power drop,
▪ Short circuit.
3 Perform a check of the hydro PCB. See "2.14 Hydro PCB"on
page58.
Possible cause: Faulty hydro PCB.
4 Perform an electrical check of the extension PCB. See
"2.12Extension PCB"on page56.
Possible cause: Faulty extension PCB.
5 Check for applicable ESV.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.